| • | Revenue of $1,005.3 million decreased (1.2%) for the quarter, or (0.5%) in constant currency.  This compares to the guidance range of $995 to $1,005 million
                  that the Company provided in early February. | 
| • | Total organic revenue excluding COVID-19, the divested blood screening and SSI businesses, and the acquired Endomagnetics and Gynesonics businesses decreased
                  (1.4%), or (0.7%) on a constant currency basis. | 
| • | GAAP diluted EPS (loss) of ($0.08) for the quarter compared to $0.72 in the prior year period, and declined due to non-cash impairment charges on intangible
                  assets that totaled $220.9 million.  Non-GAAP EPS of $1.03 was flat compared to the prior year period, and at the high end of the guidance range of $1.00 to $1.03 that the Company provided in early February. | 
| • | Diagnostics revenue of $453.6 million increased 0.8%, or 1.5% in constant currency, primarily driven by higher molecular diagnostics sales, partially offset by
                  lower sales of COVID-19 assays. | 
| • | Excluding COVID-19 revenue, organic diagnostics sales grew 4.5%, or 5.2% on a constant currency basis. | 
| • | Molecular diagnostics revenue increased 1.0%, or 1.7% in constant currency, primarily driven by higher sales of the Company’s BV CV/TV and respiratory assays,
                  as well as Biotheranostics oncology testing. | 
| • | Excluding COVID-19 revenue, molecular diagnostics revenue grew 7.2%, or 7.8% on a constant currency basis. | 
| • | Breast Health revenue of $356.2 million decreased (7.4%), or (6.9%) in constant currency, primarily driven by lower sales of mammography capital equipment,
                  partially offset by increased service contract revenue and the inclusion of Endomagnetics revenue. | 
| • | Organic breast health revenue, which excludes sales from the divested SSI and acquired Endomagnetics businesses, decreased (9.7%), or (9.2%) in constant
                  currency. | 
| • | Surgical revenue of $162.5 million grew 4.2%, or 5.1% in constant currency, primarily driven by the addition of the acquired Gynesonics business and strong
                  international sales. | 
| • | Organic surgical revenue, which excludes sales from Gynesonics, increased 0.1%, or 1.1% in constant currency. | 
| • | The Company repurchased 3.0 million shares for $200 million in the second quarter of fiscal 2025. | 
|  GAAP | Non-GAAP | |||||||||||||||||||||||
| Q2’25 | Q2’24 | Change Increase (Decrease) | Q2’25 | Q2’24 | Change Increase (Decrease) | |||||||||||||||||||
| Revenue | $ | 1,005.3 | $ | 1,017.8 | (1.2%) |  | $ | 1,005.3 | $ | 1,017.8 | (1.2%) |  | ||||||||||||
| Gross margin | 37.5% |  | 53.3% |  | (1,580 bps) | 61.1% |  | 60.7% | 40 bps | |||||||||||||||
| Operating expenses | $ | 384.3 | $ | 331.9 | 15.8% |  | $ | 312.9 | $ | 307.6 | 1.7% | |||||||||||||
| Operating margin | (0.7%) |  | 20.7% |  | (2,140 bps) | 30.0% | 30.4% | (40 bps) | ||||||||||||||||
| Net margin | (1.7%) |  | 16.7% |  | (1,840 bps) | 23.2% | 24.0% | (80 bps) | ||||||||||||||||
| Diluted EPS | $  | (0.08) |  | $ | 0.72 | (111.1%) |  | $ | 1.03 | $ | 1.03 | 0.0% | ||||||||||||
| Increase (Decrease) | ||||||||||||||||||||||||||||
| $ in millions | Q2’25 | Q2’24 | Global  Reported  Change | Global Constant  Currency  Change | U.S. Reported  Change | International Reported Change | International Constant  Currency  Change | |||||||||||||||||||||
| Diagnostics | ||||||||||||||||||||||||||||
| Cytology and perinatal | $ | 118.5 | $ | 120.5 | (1.7 | %) | (0.6 | %) | 0.7 | % | (4.8 | %) | (2.4 | %) | ||||||||||||||
| Molecular diagnostics | $ | 326.0 | $ | 322.7 | 1.0 | % | 1.7 | % | 1.3 | % | (0.1 | %) | 3.1 | % | ||||||||||||||
| Blood screening | $ | 9.1 | $ | 6.9 | 31.9 | % | 31.9 | % | 31.9 | % | N/A | N/A | ||||||||||||||||
| Total diagnostics | $ | 453.6 | $ | 450.1 | 0.8 | % | 1.5 | % | 1.8 | % | (2.1 | %) | 0.8 | % | ||||||||||||||
| Organic diagnostics ex. COVID-19 | $ | 407.4 | $ | 390.0 | 4.5 | % | 5.2 | % | 6.6 | % | (1.3 | %) | 1.6 | % | ||||||||||||||
| Organic molecular ex. COVID-19 | $ | 288.9 | $ | 269.5 | 7.2 | % | 7.8 | % | 8.6 | % | 1.9 | % | 5.1 | % | ||||||||||||||
| Breast health | ||||||||||||||||||||||||||||
| Breast imaging | $ | 271.9 | $ | 306.7 | (11.3 | %) | (10.9 | %) | (10.9 | %) | (12.9 | %) | (10.9 | %) | ||||||||||||||
| Interventional breast solutions | $ | 84.3 | $ | 77.9 | 8.2 | % | 8.7 | % | 2.6 | % | 27.2 | % | 29.7 | % | ||||||||||||||
| Total breast health | $ | 356.2 | $ | 384.6 | (7.4 | %) | (6.9 | %) | (8.1 | %) | (5.1 | %) | (2.9 | %) | ||||||||||||||
| Organic breast health | $ | 346.2 | $ | 383.5 | (9.7 | %) | (9.2 | %) | (9.4 | %) | (10.8 | %) | (8.6 | %) | ||||||||||||||
| Organic interventional | $ | 74.6 | $ | 77.9 | (4.2 | %) | (3.7 | %) | (3.6 | %) | (6.4 | %) | (3.9 | %) | ||||||||||||||
| GYN surgical | $ | 162.5 | $ | 156.0 | 4.2 | % | 5.1 | % | 1.2 | % | 12.8 | % | 16.2 | % | ||||||||||||||
| Organic surgical | $ | 156.2 | $ | 156.0 | 0.1 | % | 1.1 | % | (1.8 | %) | 5.8 | % | 9.2 | % | ||||||||||||||
| Skeletal health | $ | 33.0 | $ | 27.1 | 21.8 | % | 22.9 | % | 13.4 | % | 33.2 | % | 35.5 | % | ||||||||||||||
| Total | $ | 1,005.3 | $ | 1,017.8 | (1.2 | %) | (0.5 | %) | (1.9 | %) | 0.8 | % | 3.5 | % | ||||||||||||||
| Organic revenue (definition above) | $ | 980.0 | $ | 1,009.8 | (3.0 | %) | (2.3 | %) | (3.2 | %) | (2.2 | %) | 0.4 | % | ||||||||||||||
| Organic revenue excluding COVID-19 | $ | 942.9 | $ | 956.6 | (1.4 | %) | (0.7 | %) | (1.3 | %) | (1.9 | %) | 0.8 | % | ||||||||||||||
| • | U.S. revenue of $744.9 million decreased (1.9%).  International revenue of $260.4 million increased 0.8%, or 3.5% in constant currency. | 
| • | GAAP gross margin of 37.5% decreased (1,580) basis points primarily due to impairment charges on intangible assets.  Non-GAAP gross margin of 61.1% increased 40
                  basis points primarily due to the accretive impact to gross margin from the inclusion of Endomagnetics and Gynesonics results. | 
| • | GAAP operating margin of (0.7%) decreased (2,140) basis points primarily due to impairment charges on intangible assets.  Non-GAAP operating margin of 30.0%
                  decreased (40) basis points, primarily due to expected margin dilution from the inclusion of Endomagnetics and Gynesonics results. | 
| • | GAAP net income (loss) of ($17.4) million decreased (110.2%), while non-GAAP net income of $232.9 million decreased (4.6%).  Adjusted earnings before interest,
                  taxes, depreciation and amortization (EBITDA) were $325.8 million, a decrease of (2.9%). | 
| • | COVID-19 revenue, which consisted of COVID-19 assay revenue of $10.5 million and other COVID-19 related revenue of $26.6 million, decreased (30.3%), or (29.6%)
                  in constant currency. | 
| • | Cash flow from operations was $169.5 million in the second quarter. | 
| • | The Company ended the quarter with cash and cash equivalents of $1.43 billion and an adjusted net leverage ratio (net debt over adjusted EBITDA) of 0.8 times. 
                  In addition, the Company had short-term investments of $192 million. | 
| • | Adjusted Return on Invested Capital (ROIC) was 13.7%, an increase of 30 basis points compared to the prior year period. | 
| Current Guidance | Previous Guidance | |||||||||
| Guidance $ | Reported %  Increase  (Decrease) | Constant  Currency %  Increase  (Decrease) | Organic %  Increase  (Decrease) | Organic  excluding  COVID-19 %  Increase  (Decrease) | Guidance $ | |||||
| Fiscal 2025 | ||||||||||
| Revenue | $4,050 - $4,100 | 0.5% to 1.7% | 0.8% to 2.1% | (0.7%) to 0.5% | 0.3% to 1.6% | $4,050-$4,100 | ||||
| GAAP EPS | $2.47 - $2.57 | (25.6%) to (22.6%) | $3.51-$3.61 | |||||||
| Non-GAAP EPS | $4.15 - $4.25 | 1.7% to 4.2% | $4.25-$4.35 | |||||||
|  | ||||||||||
| Q3 2025 | ||||||||||
| Revenue | $1,000 - $1,010 | (1.1%) to (0.1%) | (1.0%) to (0.0%) | (3.5%) to (2.5%) | (2.9%) to (1.8%) | |||||
| GAAP EPS | $0.85 - $0.88 | 3.7% to 7.3% | ||||||||
| Non-GAAP EPS | $1.04 - $1.07 | (1.9%) to 0.9% | ||||||||
| Three Months Ended | Six Months Ended | |||||||||||||||
| March 29, 2025 | March 30, 2024 | March 29, 2025 | March 30, 2024 | |||||||||||||
| Revenues: | ||||||||||||||||
| Product | $ | 792.7 | $ | 828.0 | $ | 1,610.6 | $ | 1,656.0 | ||||||||
| Service and other | 212.6 | 189.8 | 416.5 | 374.9 | ||||||||||||
| Total revenues | 1,005.3 | 1,017.8 | 2,027.1 | 2,030.9 | ||||||||||||
| Cost of revenues: | ||||||||||||||||
| Product | 305.0 | 308.6 | 606.1 | 615.7 | ||||||||||||
| Amortization of acquired intangible assets | 48.2 | 44.9 | 94.2 | 90.5 | ||||||||||||
| Impairment of intangible assets | 183.4 | 25.9 | 183.4 | 25.9 | ||||||||||||
| Service and other | 91.4 | 96.1 | 185.6 | 189.0 | ||||||||||||
| Gross profit | 377.3 | 542.3 | 957.8 | 1,109.8 | ||||||||||||
| Operating expenses: | ||||||||||||||||
| Research and development | 61.5 | 74.6 | 121.8 | 141.4 | ||||||||||||
| Selling and marketing | 154.4 | 144.2 | 320.5 | 293.1 | ||||||||||||
| General and administrative | 119.7 | 100.4 | 235.4 | 212.2 | ||||||||||||
| Amortization of acquired intangible assets | 3.8 | 5.7 | 8.5 | 19.0 | ||||||||||||
| Impairment of intangible assets | 37.5 | 0.9 | 37.5 | 5.2 | ||||||||||||
| Contingent consideration fair value adjustment | — | — | — | 1.7 | ||||||||||||
| Restructuring charges | 7.4 | 6.1 | 11.3 | 28.6 | ||||||||||||
| Total operating expenses | 384.3 | 331.9 | 735.0 | 701.2 | ||||||||||||
| Income (loss) from operations | (7.0 | ) | 210.4 | 222.8 | 408.6 | |||||||||||
| Interest income | 14.9 | 24.0 | 39.1 | 51.9 | ||||||||||||
| Interest expense | (29.1 | ) | (32.3 | ) | (59.6 | ) | (58.3 | ) | ||||||||
| Other income (expense), net | (7.3 | ) | 9.4 | 16.7 | 0.6 | |||||||||||
| Income (loss) before income taxes | (28.5 | ) | 211.5 | 219.0 | 402.8 | |||||||||||
| Provision (benefit) for income taxes | (11.1 | ) | 41.6 | 35.4 | (13.6 | ) | ||||||||||
| Net income (loss) | $ | (17.4 | ) | $ | 169.9 | $ | 183.6 | $ | 416.4 | |||||||
| Net income (loss) per common share: | ||||||||||||||||
| Basic | $ | (0.08 | ) | $ | 0.72 | $ | 0.81 | $ | 1.76 | |||||||
| Diluted | $ | (0.08 | ) | $ | 0.72 | $ | 0.80 | $ | 1.74 | |||||||
| Weighted average number of shares outstanding: | ||||||||||||||||
| Basic | 225,774 | 235,890 | 228,029 | 237,258 | ||||||||||||
| Diluted | 225,774 | 237,562 | 229,549 | 238,888 | ||||||||||||
| March 29, 2025 | September 28, 2024 | |||||||
| ASSETS | ||||||||
| Current assets: | ||||||||
| Cash and cash equivalents | $ | 1,429.5 | $ | 2,160.2 | ||||
| Short-term investments | 191.5 | 173.4 | ||||||
| Accounts receivable, net | 644.4 | 600.4 | ||||||
| Inventory | 716.7 | 679.8 | ||||||
| Other current assets | 226.6 | 209.5 | ||||||
| Total current assets | 3,208.7 | 3,823.3 | ||||||
| Property, plant and equipment, net | 555.8 | 537.8 | ||||||
| Goodwill and intangible assets | 4,297.8 | 4,287.7 | ||||||
| Long-term investments | — | 96.4 | ||||||
| Other assets | 482.8 | 410.8 | ||||||
| Total assets | $ | 8,545.1 | $ | 9,156.0 | ||||
| LIABILITIES AND STOCKHOLDERS’ EQUITY | ||||||||
| Current liabilities: | ||||||||
| Current portion of long-term debt | $ | 56.2 | $ | 37.5 | ||||
| Accounts payable and accrued liabilities | 720.2 | 786.8 | ||||||
| Deferred revenue | 213.3 | 212.9 | ||||||
| Total current liabilities | 989.7 | 1,037.2 | ||||||
| Long-term debt, net of current portion | 2,461.3 | 2,497.1 | ||||||
| Deferred income taxes | 46.6 | 59.4 | ||||||
| Other long-term liabilities | 428.8 | 432.3 | ||||||
| Total stockholders’ equity | 4,618.7 | 5,130.0 | ||||||
| Total liabilities and stockholders’ equity | $ | 8,545.1 | $ | 9,156.0 | ||||
| Six Months Ended | ||||||||
| March 29, 2025 | March 30, 2024 | |||||||
| OPERATING ACTIVITIES | ||||||||
| Net income | $ | 183.6 | $ | 416.4 | ||||
| Adjustments to reconcile net income to net cash provided by operating activities: | ||||||||
| Depreciation | 47.4 | 52.6 | ||||||
| Amortization of acquired intangible assets | 102.8 | 109.5 | ||||||
| Stock-based compensation expense | 58.5 | 54.5 | ||||||
| Deferred income taxes | (82.2 | ) | (46.8 | ) | ||||
| Intangible asset impairment charges | 220.9 | 31.1 | ||||||
| Other adjustments and non-cash items | 1.3 | 24.7 | ||||||
| Changes in operating assets and liabilities, excluding the effect of acquisitions and dispositions: | ||||||||
| Accounts receivable | (45.4 | ) | (20.1 | ) | ||||
| Inventories | (41.8 | ) | (30.4 | ) | ||||
| Prepaid income taxes | (7.2 | ) | (115.3 | ) | ||||
| Prepaid expenses and other assets | 8.8 | (12.5 | ) | |||||
| Accounts payable | 5.2 | 26.7 | ||||||
| Accrued expenses and other liabilities | (93.7 | ) | 13.3 | |||||
| Deferred revenue | 0.5 | 8.7 | ||||||
| Net cash provided by operating activities | 358.7 | 512.4 | ||||||
| INVESTING ACTIVITIES | ||||||||
| Acquisition of businesses, net of cash acquired | (322.8 | ) | — | |||||
| Acquisition of intangible assets | (15.4 | ) | — | |||||
| Sale of business, net of cash disposed | — | (31.3 | ) | |||||
| Capital expenditures | (32.3 | ) | (35.5 | ) | ||||
| Increase in equipment under customer usage agreements | (39.5 | ) | (30.5 | ) | ||||
| Strategic investments | (15.0 | ) | (39.5 | ) | ||||
| Maturities of available-for-sale securities | 80.0 | — | ||||||
| Other activity | (1.3 | ) | (5.9 | ) | ||||
| Net cash used in investing activities | (346.3 | ) | (142.7 | ) | ||||
| FINANCING ACTIVITIES | ||||||||
| Repayment of long-term debt | (18.8 | ) | (268.8 | ) | ||||
| Payment of contingent consideration | — | (2.6 | ) | |||||
| Repurchases of common stock | (717.3 | ) | (676.8 | ) | ||||
| Proceeds from issuance of common stock under employee stock plans | 20.9 | 18.4 | ||||||
| Payment of minimum tax withholdings on net share settlements of equity awards | (21.9 | ) | (16.3 | ) | ||||
| Payments under finance lease obligations | (1.6 | ) | (1.9 | ) | ||||
| Net cash used in financing activities | (738.7 | ) | (948.0 | ) | ||||
| Effect of exchange rate changes on cash and cash equivalents | (4.4 | ) | 2.6 | |||||
| Net decrease in cash and cash equivalents | (730.7 | ) | (575.7 | ) | ||||
| Cash and cash equivalents, beginning of period* | 2,160.2 | 2,755.7 | ||||||
| Cash and cash equivalents, end of period | $ | 1,429.5 | $ | 2,180.0 | ||||
| Three Months Ended | Six Months Ended | |||||||||||||||
| March 29, 2025 | March 30, 2024 | March 29, 2025 | March 30, 2024 | |||||||||||||
| Consolidated GAAP Revenue | $ | 1,005.3 | $ | 1,017.8 | $ | 2,027.1 | $ | 2,030.9 | ||||||||
| Less: Blood Screening revenue | (9.1 | ) | (6.9 | ) | (13.3 | ) | (14.9 | ) | ||||||||
| Less: SSI revenue | (0.2 | ) | (1.1 | ) | (0.5 | ) | (1.8 | ) | ||||||||
| Less: Endomagnetics | (9.7 | ) | — | (23.8 | ) | — | ||||||||||
| Less: Gynesonics | (6.3 | ) | — | (6.3 | ) | — | ||||||||||
| Organic Revenue | $ | 980.0 | $ | 1,009.8 | $ | 1,983.2 | $ | 2,014.2 | ||||||||
| Less: COVID-19 Assays | (10.5 | ) | (23.3 | ) | (27.4 | ) | (50.1 | ) | ||||||||
| Less: COVID-19 Related Revenue* | (26.6 | ) | (29.9 | ) | (53.3 | ) | (54.8 | ) | ||||||||
| Organic Revenue excluding COVID-19 | $ | 942.9 | $ | 956.6 | $ | 1,902.5 | $ | 1,909.3 | ||||||||
| Three Months Ended | Six Months Ended | |||||||||||||||
| March 29, 2025 | March 30, 2024 | March 29, 2025 | March 30, 2024 | |||||||||||||
| Gross Profit: | ||||||||||||||||
| GAAP gross profit | $ | 377.3 | $ | 542.3 | $ | 957.8 | $ | 1,109.8 | ||||||||
| Adjustments: | ||||||||||||||||
| Amortization of acquired intangible assets (1) | 48.2 | 44.9 | 94.2 | 90.5 | ||||||||||||
| Impairment of intangible assets (13) | 183.4 | 25.9 | 183.4 | 25.9 | ||||||||||||
| Product line discontinuance (12) | — | 4.4 | — | 7.1 | ||||||||||||
| Acquisition related expenses (2) (15) | 5.6 | — | 8.9 | — | ||||||||||||
| Non-GAAP gross profit | $ | 614.5 | $ | 617.5 | $ | 1,244.3 | $ | 1,233.3 | ||||||||
| Gross Margin Percentage: | ||||||||||||||||
| GAAP gross margin percentage | 37.5 | % | 53.3 | % | 47.2 | % | 54.6 | % | ||||||||
| Impact of adjustments above | 23.6 | % | 7.4 | % | 14.2 | % | 6.1 | % | ||||||||
| Non-GAAP gross margin percentage | 61.1 | % | 60.7 | % | 61.4 | % | 60.7 | % | ||||||||
| Operating Expenses: | ||||||||||||||||
| GAAP operating expenses | $ | 384.3 | $ | 331.9 | $ | 735.0 | $ | 701.2 | ||||||||
| Adjustments: | ||||||||||||||||
| Amortization of acquired intangible assets (1) | (3.8 | ) | (5.7 | ) | (8.5 | ) | (19.0 | ) | ||||||||
| Impairment of intangible assets (13) | (37.5 | ) | (0.9 | ) | (37.5 | ) | (5.2 | ) | ||||||||
| Acquisition related expenses (4) (15) | (22.1 | ) | (1.6 | ) | (25.5 | ) | (1.8 | ) | ||||||||
| Contingent consideration adjustment (7) | — | — | — | (1.7 | ) | |||||||||||
| Integration/consolidation costs (3) | (0.6 | ) | — | (10.2 | ) | — | ||||||||||
| Purchased research and development asset charge (14) | — | (10.0 | ) | — | (10.0 | ) | ||||||||||
| Restructuring charges (3) | (7.4 | ) | (6.1 | ) | (11.3 | ) | (28.6 | ) | ||||||||
| Non-GAAP operating expenses | $ | 312.9 | $ | 307.6 | $ | 642.0 | $ | 634.9 | ||||||||
| Operating Margin: | ||||||||||||||||
| GAAP income (loss) from operations | $ | (7.0 | ) | $ | 210.4 | $ | 222.8 | $ | 408.6 | |||||||
| Adjustments to gross profit as detailed above | 237.2 | 75.2 | 286.5 | 123.5 | ||||||||||||
| Adjustments to operating expenses as detailed above | 71.4 | 24.3 | 93.0 | 66.3 | ||||||||||||
| Non-GAAP income from operations | $ | 301.6 | $ | 309.9 | $ | 602.3 | $ | 598.4 | ||||||||
| Operating Margin Percentage: | ||||||||||||||||
| GAAP income (loss) from operations margin percentage | (0.7 | )% | 20.7 | % | 11.0 | % | 20.1 | % | ||||||||
| Impact of adjustments above | 30.7 | % | 9.7 | % | 18.7 | % | 9.4 | % | ||||||||
| Non-GAAP operating margin percentage | 30.0 | % | 30.4 | % | 29.7 | % | 29.5 | % | ||||||||
| Three Months Ended | Six Months Ended | |||||||||||||||
| March 29, 2025 | March 30, 2024 | March 29, 2025 | March 30, 2024 | |||||||||||||
| Pre-Tax Income (Loss): | ||||||||||||||||
| GAAP pre-tax earnings (loss) | $ | (28.5 | ) | $ | 211.5 | $ | 219.0 | $ | 402.8 | |||||||
| Adjustments to pre-tax earnings (loss) as detailed above | 308.6 | 99.5 | 379.5 | 189.8 | ||||||||||||
| Debt extinguishment loss (6) | — | — | — | 0.4 | ||||||||||||
| Unrealized losses (gains) on forward foreign currency contracts (8) | 7.4 | (6.8 | ) | (14.6 | ) | 5.8 | ||||||||||
| Non-GAAP pre-tax income | $ | 287.5 | $ | 304.2 | $ | 583.9 | $ | 598.8 | ||||||||
| Net Income (Loss): | ||||||||||||||||
| GAAP net income (loss) | $ | (17.4 | ) | $ | 169.9 | $ | 183.6 | $ | 416.4 | |||||||
| Adjustments: | ||||||||||||||||
| Amortization of acquired intangible assets (1) | 52.0 | 50.6 | 102.7 | 109.5 | ||||||||||||
| Impairment of intangible assets (13) | 220.9 | 26.8 | 220.9 | 31.1 | ||||||||||||
| Restructuring and integration/consolidation costs (3) | 8.0 | 6.1 | 21.5 | 28.6 | ||||||||||||
| Purchased research and development asset charge (14) | — | 10.0 | — | 10.0 | ||||||||||||
| Product line discontinuance (12) | — | 4.4 | — | 7.1 | ||||||||||||
| Debt extinguishment loss (6) | — | — | — | 0.4 | ||||||||||||
| Acquisition related expenses (2) (4) (15) | 27.7 | 1.6 | 34.4 | 1.8 | ||||||||||||
| Contingent consideration adjustment (7) | — | — | — | 1.7 | ||||||||||||
| Unrealized losses (gains) on forward foreign currency contracts (8) | 7.4 | (6.8 | ) | (14.6 | ) | 5.8 | ||||||||||
| Worthless stock deduction (5) | — | — | — | (107.2 | ) | |||||||||||
| Income tax related items (9) | 9.9 | 2.5 | 9.6 | 11.8 | ||||||||||||
| Income tax effect of reconciling items (11) | (75.6 | ) | (21.0 | ) | (86.6 | ) | (36.5 | ) | ||||||||
| Non-GAAP net income | $ | 232.9 | $ | 244.1 | $ | 471.5 | $ | 480.5 | ||||||||
| Net Income (Loss) Percentage: | ||||||||||||||||
| GAAP net income (loss) percentage | (1.7 | )% | 16.7 | % | 9.1 | % | 20.5 | % | ||||||||
| Impact of adjustments above | 24.9 | % | 7.3 | % | 14.2 | % | 3.2 | % | ||||||||
| Non-GAAP net income percentage | 23.2 | % | 24.0 | % | 23.3 | % | 23.7 | % | ||||||||
| Earnings (Loss) per Share: | ||||||||||||||||
| GAAP income (loss) per share - Diluted | $ | (0.08 | ) | $ | 0.72 | $ | 0.80 | $ | 1.74 | |||||||
| Adjustment to net income (loss) (as detailed above) | 1.11 | 0.31 | 1.25 | 0.27 | ||||||||||||
| Non-GAAP earnings per share – diluted (10) | $ | 1.03 | $ | 1.03 | $ | 2.05 | $ | 2.01 | ||||||||
| Adjusted EBITDA: | ||||||||||||||||
| Non-GAAP net income | $ | 232.9 | $ | 244.1 | $ | 471.5 | $ | 480.5 | ||||||||
| Interest expense (income), net | 14.2 | 8.3 | 20.5 | 6.4 | ||||||||||||
| Provision for income taxes | 54.6 | 60.2 | 112.5 | 118.3 | ||||||||||||
| Depreciation expense, not adjusted above | 24.1 | 23.0 | 47.4 | 45.4 | ||||||||||||
| Adjusted EBITDA | $ | 325.8 | $ | 335.6 | $ | 651.9 | $ | 650.6 | ||||||||
| (1) | To reflect non-cash expenses attributable to the amortization of acquired intangible assets. | 
| (2) | To reflect the fair value write-up of inventory sold during the period related to the Endomagnetics and Gynesonics acquisitions of $3.3 million and $4.0
                  million in the first and second quarters of fiscal 2025, respectively. | 
| (3) | To reflect restructuring charges, and certain costs associated with the Company’s integration and facility consolidation plans, which primarily include
                  severance, retention, and transfer costs as well as costs incurred to integrate acquisitions, including legal, tax and professional consulting services
                  and contract termination costs. | 
| (4) | To reflect expenses with third parties related to acquisitions prior to when such transactions are completed. These expenses primarily comprise legal,
                  consulting and due diligence fees. | 
| (5) | To reflect the discrete tax benefit related to a worthless stock deduction on the investment in one of the Company’s international subsidiaries. | 
| (6) | To reflect a debt extinguishment loss for the prepayment of principal under the Credit Agreement in first quarter of fiscal 2024. | 
| (7) | To reflect an adjustment to the estimated contingent consideration liability related to the Acessa Health acquisition, which was payable upon meeting defined revenue growth
                metrics. | 
| (8) | To reflect non-cash unrealized gains and losses on the mark-to market on outstanding forward foreign currency contracts, for which the Company has elected to
                  not designate for hedge accounting. | 
| (9) | To reflect the net impact of income tax reserves from the expiration of the statute of limitations, and non-recurring income tax charges and benefits. | 
| (10) | Non-GAAP earnings per share was calculated based on 226,991 and 229,549 weighted average diluted shares outstanding for the three and six months ended March
                  29, 2025, respectively, and 237,562 and 238,888 for the three and six months ended March 30, 2024, respectively. | 
| (11) | To reflect the tax effects of Non-GAAP reconciling items, excluding specific income tax related items and the worthless stock deduction.  Amounts are
                  calculated using the effective tax rate in the jurisdiction to which the adjustment relates, and the overall effective tax rate was 19.00% and 19.25% for the three and six months ended March 29, 2025, respectively, and 19.75% for the
                  three and six months ended March 30, 2024. | 
| (12) | To reflect the write-off of inventory and charges for non-cancellable purchase orders related to a product line discontinuance in the Diagnostics division. | 
| (13) | To reflect impairment charges related to the Acessa ($61.9 million),
                  Bolder ($64.5 million), Mobidiag ($39.0 million), and Diagenode ($38.6 million) acquisitions recorded during the second quarter of fiscal 2025 and BioZorb ($26.8 million), which was from the Focal acquisition, during the second quarter of
                  fiscal 2024. This also includes an impairment charge for an in-process research and development intangible asset acquired in the Mobidiag acquisition recorded during the second quarters of fiscal 2024 ($4.3 million) and 2025 ($16.9
                  million). | 
| (14) | To reflect the purchase of an intangible asset to be used in a research and development project that has no future alternative use. | 
| (15) | To reflect an aggregate charge of $22.4 million for the acceleration of unvested stock options in connection with the Gynesonics acquisition recorded in the
                  second quarter of fiscal 2025. | 
| Guidance Range | ||||||||||||||||
| Quarter Ending June 28, 2025 | Year Ending September 27, 2025 | |||||||||||||||
|  Low | High | Low | High | |||||||||||||
| GAAP Net Income Per Share | $ | 0.85 | $ | 0.88 | $ | 2.47 | $ | 2.57 | ||||||||
| Amortization of acquired intangible assets | $ | 0.20 | $ | 0.20 | $ | 0.84 | $ | 0.84 | ||||||||
| Impairment of intangible assets | — | — | $ | 0.97 | $ | 0.97 | ||||||||||
| Step-up of acquired inventory | — | — | $ | 0.03 | $ | 0.03 | ||||||||||
| Restructuring, integration and other charges | $ | 0.03 | $ | 0.03 | $ | 0.26 | $ | 0.26 | ||||||||
| Non-operating charges (benefits) | — | — | $ | (0.06 | ) | $ | (0.06 | ) | ||||||||
| Income tax related items | — | — | $ | 0.04 | $ | 0.04 | ||||||||||
| Tax impact of exclusions | $ | (0.04 | ) | $ | (0.04 | ) | $ | (0.40 | ) | $ | (0.40 | ) | ||||
| Non-GAAP Net Income Per Share | $ | 1.04 | $ | 1.07 | $ | 4.15 | $ | 4.25 | ||||||||
| Adjusted Return on Invested Capital (ROIC) Reconciliation of Net Income to ROIC: | ||||
| Trailing Twelve  Months Ended  March 29, 2025 | ||||
| Adjusted Net Operating Profit After Tax | ||||
| GAAP net income | $ | 556.6 | ||
| Adjustments to GAAP net income | 403.0 | |||
| Non-GAAP net income | $ | 959.6 | ||
| Non-GAAP provision for income taxes | 232.5 | |||
| GAAP interest expense | 123.4 | |||
| Non-GAAP other income | (101.5 | ) | ||
| Adjusted net operating profit before tax | $ | 1,214.0 | ||
| Non-GAAP average effective tax rate (1) | 19.5 | % | ||
| Adjusted net operating profit after tax | $ | 977.3 | ||
| Average Net Debt plus Average Stockholders’ Equity (2) | ||||
| Average total debt | $ | 2,534.6 | ||
| Less: Average cash and cash equivalents | (1,804.7 | ) | ||
| Average net debt | $ | 729.9 | ||
| Average stockholders’ equity (3) | 6,404.9 | |||
| Average net debt plus average stockholders’ equity | $ | 7,134.8 | ||
| Adjusted Return on Invested Capital | 13.7 | % | ||
| As of March 29, 2025 | ||||
| Net Leverage Ratio: | ||||
| Total principal debt | $ | 2,528.8 | ||
| Total cash and cash equivalents | $ | (1,429.5 | ) | |
| Net principal debt | $ | 1,099.3 | ||
| EBITDA for the last four quarters | $ | 1,313.9 | ||
| Net Leverage Ratio | 0.8 | |||
| Three Months Ended | Six Months Ended | |||||||||||||||
| March 29, 2025 | March 30, 2024 | March 29, 2025 | March 30, 2024 | |||||||||||||
| Geographic Revenues | ||||||||||||||||
| United States | 74.1 | % | 74.6 | % | 74.1 | % | 74.5 | % | ||||||||
| Europe | 14.6 | % | 13.5 | % | 14.6 | % | 13.8 | % | ||||||||
| Asia-Pacific | 5.9 | % | 6.3 | % | 5.9 | % | 6.3 | % | ||||||||
| Rest of World | 5.4 | % | 5.6 | % | 5.4 | % | 5.4 | % | ||||||||
| Total Revenues | 100.0 | % | 100.0 | % | 100.0 | % | 100.0 | % | ||||||||