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Parent Company Financial Statements Parent Company Financial Statements (Statements of Cash Flows) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items] |  |  |
Net income | $ 698 | $ 881 | $ 1,151
Net periodic defined benefit credit | (47) | (27) | (91)
Share-based compensation expense | 54 | 52 | 60
Benefit for deferred income taxes | (1) | (92) | (27)
Other, net | (183) | (5) | (614)
Net cash provided by operating activities | 601 | 1,251 | 638
Maturities and redemptions of investment securities available-for-sale | 2,213 | 2,485 | 2,511
Purchases of investment securities available-for-sale | 1,332 | 0 | 7,470
Net change in premises and equipment | (153) | (153) | (82)
Net cash provided by (used in) investing activities | 3,261 | 3,494 | (9,952)
Issuances and advances of medium- and long-term debt | 1,000 | 4,000 | 500
Cash dividends paid on preferred stock | 23 | 23 | 23
Repurchases of common stock | 100 | 0 | 36
Stock tendered for payment of withholding taxes on common stock | (14) | (17) | (7)
Cash dividends paid on common stock | (377) | (371) | (353)
Net cash used in financing activities | (6,560) | (1,525) | (7,083)
Interest paid | 1,892 | 1,449 | 130
Parent Company |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Net income | 698 | 881 | 1,151
Undistributed (losses) earnings of subsidiaries, principally banks | (554) | (228) | (105)
Net periodic defined benefit credit | 1 | 1 | 2
Share-based compensation expense | 20 | 18 | 22
Benefit for deferred income taxes | (8) | (2) | 0
Other, net | 21 | 28 | 24
Net cash provided by operating activities | 178 | 698 | 1,094
Maturities and redemptions of investment securities available-for-sale | 70 | 0 | 0
Purchases of investment securities available-for-sale | (103) | 0 | 0
Advance to subsidiary bank | (850) | 0 | 0
Capital transactions with subsidiaries | 0 | 150 | 0
Net change in premises and equipment | 0 | 0 | 2
Net cash provided by (used in) investing activities | (883) | 150 | 2
Maturities of medium- and long-term debt | 0 | (850) | 0
Issuances and advances of medium- and long-term debt | 1,000 | 0 | 0
Cash dividends paid on preferred stock | (23) | (23) | (23)
Repurchases of common stock | (100) | 0 | (36)
Stock tendered for payment of withholding taxes on common stock | 14 | 17 | (7)
Cash dividends paid on common stock | (377) | (371) | (353)
Issuances of common stock under employee stock plans | 22 | 18 | 28
Net cash used in financing activities | 508 | (1,243) | (391)
Net (decrease) increase in cash and cash equivalents | (197) | (395) | 705
Cash and cash equivalents at beginning of period | 1,415 | 1,810 | 1,105
Cash and cash equivalents at end of period | 1,218 | 1,415 | 1,810
Interest paid | $ 115 | $ 76 | $ 41

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