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Consolidated Statement of Changes in Shareholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Series J Preferred Stock | Preferred Stock | Preferred Stock Series J Preferred Stock | Common Stock | Common Stock Issuable | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss), Net | Treasury Stock
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2022 |  | $ 25,318 |  | $ 2,011 |  | $ 90 | $ 1 | $ 10,002 | $ 15,754 | $ (790) | $ (1,750)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Total comprehensive income |  | 1,494 |  |  |  |  |  |  | 1,569 |  |
Preferred stock cash dividends | [1] | (50) |  |  |  |  |  |  | (50) |  |
Stock-based compensation transactions, net |  | 74 |  |  |  |  |  | (2) | (1) |  | 77
Common stock cash dividends |  | (435) |  |  |  |  |  |  | (435) |  |
Purchases of treasury stock |  | (600) |  |  |  |  |  |  |  |  | (600)
Ending balance at Jun. 30, 2023 |  | 25,801 |  | 2,011 |  | 90 | 1 | 10,000 | 16,837 | (865) | (2,273)
Beginning balance at Mar. 31, 2023 |  | 25,377 |  | 2,011 |  | 90 | 1 | 9,986 | 16,212 | (645) | (2,278)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Total comprehensive income |  | 647 |  |  |  |  |  |  | 867 |  |
Preferred stock cash dividends | [1] | (25) |  |  |  |  |  |  | (25) |  |
Stock-based compensation transactions, net |  | 19 |  |  |  |  |  | 14 | 0 |  | 5
Common stock cash dividends |  | (217) |  |  |  |  |  |  | (217) |  |
Ending balance at Jun. 30, 2023 |  | 25,801 |  | 2,011 |  | 90 | 1 | 10,000 | 16,837 | (865) | (2,273)
Beginning balance at Dec. 31, 2023 |  | 26,957 |  | 2,011 |  | 90 | 1 | 10,020 | 17,524 | (459) | (2,230)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Total comprehensive income |  | 1,094 |  |  |  |  |  |  | 1,186 |  |
Preferred stock cash dividends | [1] | (52) |  |  |  |  |  |  | (52) |  |
Issuance of Series J preferred stock (in shares) |  |  |  |  | 733 |  |  |  |  |  |
Issuance of Series J preferred stock |  |  | $ 733 |  |  |  |  |  |  |  |
Stock-based compensation transactions, net |  | 138 |  |  |  |  |  | (44) | (1) |  | 183
Common stock cash dividends |  | (446) |  |  |  |  |  |  | (446) |  |
Ending balance at Jun. 30, 2024 |  | 28,424 |  | 2,744 |  | 90 | 1 | 9,976 | 18,211 | (551) | (2,047)
Beginning balance at Mar. 31, 2024 |  | 27,169 |  | 2,011 |  | 90 | 1 | 9,976 | 17,812 | (589) | (2,132)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Total comprehensive income |  | 693 |  |  |  |  |  |  | 655 |  |
Preferred stock cash dividends | [1] | (27) |  |  |  |  |  |  | (27) |  |
Issuance of Series J preferred stock (in shares) |  |  |  |  | 733 |  |  |  |  |  |
Issuance of Series J preferred stock |  |  | $ 733 |  |  |  |  |  |  |  |
Stock-based compensation transactions, net |  | 84 |  |  |  |  |  |  | (1) |  | 85
Common stock cash dividends |  | (228) |  |  |  |  |  |  | (228) |  |
Ending balance at Jun. 30, 2024 |  | $ 28,424 |  | $ 2,744 |  | $ 90 | $ 1 | $ 9,976 | $ 18,211 | $ (551) | $ (2,047)
[1] | For the three-month and six-month periods ended June 30, 2024, dividends per share for Preferred Series E were $22.95 and $39.075, respectively. For the three-month and six-month periods ended June 30, 2023 dividends per share for Preferred Series E were $16.125 and $32.25, respectively. For the three-month and six-month periods ended June 30, 2024 and 2023, dividends per preferred share were: Preferred Series F - $128.125 and $256.25, respectively; Preferred Series G - $125.00 and $250.00, respectively; Preferred Series H - $0.3516 and $0.7031, respectively; and Preferred Series I - $87.50 and $175.00, respectively.

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