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Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Millions | Total | Preferred Stock [Member] | Common Stock | Additional Paid-in Capital | Retained Earnings | AOCI Attributable to Parent [Member] | Treasury Stock, Common | Share-based Payment Arrangement [Member] Treasury Stock, Common
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2022 |  |  |  | $ 1,895 | $ 17,058 | $ (3,841) | $ (1,773) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under incentive and stock compensation plans and other |  |  |  | (114) |  |  |  |
Stock-based compensation plans expense |  |  |  | 66 |  |  |  |
Net income | $ 535 |  |  |  | 535 |  |  |
Dividends declared on preferred stock |  |  |  |  | (5) |  |  |
Dividends declared on common stock |  |  |  |  | (134) |  |  |
Treasury stock acquired | (350) |  |  |  |  |  | (354) |
Issuance of shares under incentive and stock compensation plans from treasury stock and other |  |  |  |  |  |  |  | $ 132
Net shares acquired related to employee incentive and stock compensation plans |  |  |  |  |  |  | (49) |
Total other comprehensive income (loss) |  |  |  |  |  | 587 |  |
Ending balance at Mar. 31, 2023 | $ 14,340 | $ 334 | $ 3 | 1,847 | 17,454 | (3,254) | (2,044) |
Preferred Stock, Shares Outstanding, Ending Balance at Mar. 31, 2023 |  | 13,800 |  |  |  |  |  |
Common Shares Outstanding, beginning of period at Dec. 31, 2022 |  |  | 315,111,000 |  |  |  |  |
Shares Granted or Issued, Share-based Payment Arrangement [Abstract] |  |  |  |  |  |  |  |
Treasury stock acquired | (4,700,000) |  | (4,719,000) |  |  |  |  |
Issuance of shares under incentive and stock compensation plans and other |  |  | 2,005,000 |  |  |  |  |
Return of shares under incentive and stock compensation plans to treasury stock |  |  | (617,000) |  |  |  |  |
Common Shares Outstanding, at end of period at Mar. 31, 2023 |  |  | 311,780,000 |  |  |  |  |
Shares Granted or Issued, Share-based Payment Arrangement [Abstract] |  |  |  |  |  |  |  |
Cash dividends declared per common share | $ 0.425 |  |  |  |  |  |  |
Cash dividends declared per preferred share | $ 375.00 |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2023 | $ 15,327 |  |  | 648 | 19,007 | (2,849) | (1,816) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under incentive and stock compensation plans and other |  |  |  | (161) |  |  |  |
Stock-based compensation plans expense |  |  |  | 64 |  |  |  |
Net income | 753 |  |  |  | 753 |  |  |
Dividends declared on preferred stock |  |  |  |  | (5) |  |  |
Dividends declared on common stock |  |  |  |  | (141) |  |  |
Treasury stock acquired | (350) |  |  |  |  |  | (353) |
Issuance of shares under incentive and stock compensation plans from treasury stock and other |  |  |  |  |  |  |  | $ 211
Net shares acquired related to employee incentive and stock compensation plans |  |  |  |  |  |  | (79) |
Total other comprehensive income (loss) |  |  |  |  |  | (148) |  |
Ending balance at Mar. 31, 2024 | $ 15,468 | $ 334 | $ 3 | $ 551 | $ 19,614 | $ (2,997) | $ (2,037) |
Preferred Stock, Shares Outstanding, Ending Balance at Mar. 31, 2024 |  | 13,800 |  |  |  |  |  |
Common Shares Outstanding, beginning of period at Dec. 31, 2023 |  |  | 298,472,000 |  |  |  |  |
Shares Granted or Issued, Share-based Payment Arrangement [Abstract] |  |  |  |  |  |  |  |
Treasury stock acquired | (3,800,000) |  | (3,847,000) |  |  |  |  |
Issuance of shares under incentive and stock compensation plans and other |  |  | 3,004,000 |  |  |  |  |
Return of shares under incentive and stock compensation plans to treasury stock |  |  | (822,000) |  |  |  |  |
Common Shares Outstanding, at end of period at Mar. 31, 2024 |  |  | 296,807,000 |  |  |  |  |
Shares Granted or Issued, Share-based Payment Arrangement [Abstract] |  |  |  |  |  |  |  |
Cash dividends declared per common share | $ 0.470 |  |  |  |  |  |  |
Cash dividends declared per preferred share | $ 375.00 |  |  |  |  |  |  |

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