| Consolidated Balance Sheets | |||||||||||||||||
| (dollars in millions) | |||||||||||||||||
| 9/30/2025 | 6/30/2025 | 9/30/2024 | |||||||||||||||
| Assets | |||||||||||||||||
| Loans | $ | 105,902 | $ | 106,389 | $ | 105,346 | |||||||||||
| Loans held for sale | 998 | 530 | 1,058 | ||||||||||||||
| Securities available for sale | 40,456 | 40,669 | 34,169 | ||||||||||||||
| Held-to-maturity securities | 7,509 | 6,914 | 7,702 | ||||||||||||||
| Trading account assets | 972 | 1,374 | 1,404 | ||||||||||||||
| Short-term investments | 13,334 | 11,564 | 22,796 | ||||||||||||||
| Other investments | 921 | 1,058 | 1,117 | ||||||||||||||
| Total earning assets | 170,092 | 168,498 | 173,592 | ||||||||||||||
| Allowance for loan and lease losses | (1,444) | (1,446) | (1,494) | ||||||||||||||
| Cash and due from banks | 1,938 | 1,766 | 1,276 | ||||||||||||||
| Premises and equipment | 606 | 599 | 624 | ||||||||||||||
| Goodwill | 2,752 | 2,752 | 2,752 | ||||||||||||||
| Other intangible assets | 13 | 18 | 34 | ||||||||||||||
| Corporate-owned life insurance | 4,428 | 4,423 | 4,379 | ||||||||||||||
| Accrued income and other assets | 8,803 | 8,654 | 8,323 | ||||||||||||||
| Discontinued assets | 221 | 235 | 277 | ||||||||||||||
| Total assets | $ | 187,409 | $ | 185,499 | $ | 189,763 | |||||||||||
| Liabilities | |||||||||||||||||
| Deposits in domestic offices: | |||||||||||||||||
| Interest-bearing deposits | 122,425 | 119,230 | 119,995 | ||||||||||||||
| Noninterest-bearing deposits | 28,340 | 27,675 | 30,358 | ||||||||||||||
| Total deposits | 150,765 | 146,905 | 150,353 | ||||||||||||||
| Federal funds purchased and securities sold under repurchase agreements | 10 | 20 | 44 | ||||||||||||||
| Bank notes and other short-term borrowings | 1,339 | 2,754 | 2,359 | ||||||||||||||
| Accrued expense and other liabilities | 4,276 | 4,273 | 4,478 | ||||||||||||||
| Long-term debt | 10,917 | 12,063 | 15,677 | ||||||||||||||
| Total liabilities | 167,307 | 166,015 | 172,911 | ||||||||||||||
| Equity | |||||||||||||||||
| Preferred stock | 2,500 | 2,500 | 2,500 | ||||||||||||||
| Common shares | 1,257 | 1,257 | 1,257 | ||||||||||||||
| Capital surplus | 6,002 | 5,971 | 6,149 | ||||||||||||||
| Retained earnings | 15,111 | 14,886 | 15,066 | ||||||||||||||
| Treasury stock, at cost | (2,619) | (2,629) | (4,839) | ||||||||||||||
| Accumulated other comprehensive income (loss) | (2,149) | (2,501) | (3,281) | ||||||||||||||
| Total equity | 20,102 | 19,484 | 16,852 | ||||||||||||||
| Total liabilities and equity | $ | 187,409 | $ | 185,499 | $ | 189,763 | |||||||||||
| Common shares outstanding (000) | 1,112,952 | 1,112,453 | 991,251 | ||||||||||||||
| Consolidated Statements of Income | |||||||||||||||||
| (dollars in millions, except per share amounts) | |||||||||||||||||
| Three months ended | |||||||||||||||||
| 9/30/2025 | 6/30/2025 | 9/30/2024 | |||||||||||||||
| Interest income | |||||||||||||||||
| Loans | $ | 1,466 | $ | 1,443 | $ | 1,516 | |||||||||||
| Loans held for sale | 18 | 11 | 18 | ||||||||||||||
| Securities available for sale | 408 | 411 | 298 | ||||||||||||||
| Held-to-maturity securities | 64 | 61 | 70 | ||||||||||||||
| Trading account assets | 11 | 16 | 15 | ||||||||||||||
| Short-term investments | 156 | 157 | 244 | ||||||||||||||
| Other investments | 8 | 8 | 14 | ||||||||||||||
| Total interest income | 2,131 | 2,107 | 2,175 | ||||||||||||||
| Interest expense | |||||||||||||||||
| Deposits | 748 | 730 | 887 | ||||||||||||||
| Federal funds purchased and securities sold under repurchase agreements | 4 | 4 | 1 | ||||||||||||||
| Bank notes and other short-term borrowings | 14 | 34 | 43 | ||||||||||||||
| Long-term debt | 181 | 198 | 292 | ||||||||||||||
| Total interest expense | 947 | 966 | 1,223 | ||||||||||||||
| Net interest income | 1,184 | 1,141 | 952 | ||||||||||||||
| Provision for credit losses | 107 | 138 | 95 | ||||||||||||||
| Net interest income after provision for credit losses | 1,077 | 1,003 | 857 | ||||||||||||||
| Noninterest income | |||||||||||||||||
| Trust and investment services income | 150 | 146 | 140 | ||||||||||||||
| Investment banking and debt placement fees | 184 | 178 | 171 | ||||||||||||||
| Service charges on deposit accounts | 75 | 73 | 67 | ||||||||||||||
| Operating lease income and other leasing gains | 11 | 14 | 16 | ||||||||||||||
| Corporate services income | 72 | 76 | 69 | ||||||||||||||
| Cards and payments income | 86 | 85 | 84 | ||||||||||||||
| Corporate-owned life insurance income | 35 | 32 | 36 | ||||||||||||||
| Consumer mortgage income | 14 | 15 | 12 | ||||||||||||||
| Commercial mortgage servicing fees | 73 | 70 | 73 | ||||||||||||||
| Other income | 8 | 1 | (2) | ||||||||||||||
| Net securities gains (losses) | (6) | — | (935) | ||||||||||||||
| Total noninterest income | 702 | 690 | (269) | ||||||||||||||
| Noninterest expense | |||||||||||||||||
| Personnel | 742 | 705 | 670 | ||||||||||||||
| Net occupancy | 65 | 69 | 66 | ||||||||||||||
| Computer processing | 105 | 107 | 104 | ||||||||||||||
| Business services and professional fees | 44 | 48 | 41 | ||||||||||||||
| Equipment | 20 | 21 | 20 | ||||||||||||||
| Operating lease expense | 9 | 10 | 14 | ||||||||||||||
| Marketing | 22 | 24 | 21 | ||||||||||||||
| Intangible asset amortization | — | — | — | ||||||||||||||
| Other expense | 170 | 170 | 158 | ||||||||||||||
| Total noninterest expense | 1,177 | 1,154 | 1,094 | ||||||||||||||
| Income (loss) from continuing operations before income taxes | 602 | 539 | (506) | ||||||||||||||
| Income taxes | 112 | 116 | (95) | ||||||||||||||
| Income (loss) from continuing operations | 490 | 423 | (411) | ||||||||||||||
| Income (loss) from discontinued operations, net of taxes | (1) | 2 | 1 | ||||||||||||||
| Net income (loss) | 489 | 425 | (410) | ||||||||||||||
| Less: Net income (loss) attributable to noncontrolling interests | — | — | — | ||||||||||||||
| Net income (loss) attributable to Key | $ | 489 | $ | 425 | $ | (410) | |||||||||||
| Income (loss) from continuing operations attributable to Key common shareholders | $ | 454 | $ | 387 | $ | (447) | |||||||||||
| Net income (loss) attributable to Key common shareholders | 453 | 389 | (446) | ||||||||||||||
| Per common share | |||||||||||||||||
| Income (loss) from continuing operations attributable to Key common shareholders | $ | .41 | $ | .35 | $ | (.47) | |||||||||||
| Income (loss) from discontinued operations, net of taxes | — | — | — | ||||||||||||||
Net income (loss) attributable to Key common shareholders (a) | .41 | .35 | (.47) | ||||||||||||||
| Per common share — assuming dilution | |||||||||||||||||
| Income (loss) from continuing operations attributable to Key common shareholders | $ | .41 | $ | .35 | $ | (.47) | |||||||||||
| Income (loss) from discontinued operations, net of taxes | — | — | — | ||||||||||||||
Net income (loss) attributable to Key common shareholders (a) | .41 | .35 | $ | (.47) | |||||||||||||
| Cash dividends declared per common share | $ | .205 | $ | .205 | $ | .205 | |||||||||||
| Weighted-average common shares outstanding (000) | 1,100,830 | 1,100,033 | 948,979 | ||||||||||||||
Effect of common share options and other stock awards (b) | 9,845 | 7,177 | — | ||||||||||||||
Weighted-average common shares and potential common shares outstanding (000) (c) | 1,110,675 | 1,107,210 | 948,979 | ||||||||||||||