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Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
AOCI beginning balance |  |  | $ (8,268) |
Other comprehensive income (loss) before reclassifications | $ (410) | $ (1,518) | (1,853) | $ (345)
Amounts reclassified from AOCI into earnings | 243 | 240 | 420 | 443
Other comprehensive income (loss), net of tax | (167) | (1,278) | (1,433) | 98
AOCI ending balance | (9,701) |  | (9,701) |
Securities Available for Sale |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
AOCI beginning balance | (7,613) | (6,714) | (6,769) | (7,676)
Other comprehensive income (loss) before reclassifications | (184) | (888) | (1,028) | 74
Amounts reclassified from AOCI into earnings | 0 | 0 | 0 | 0
Other comprehensive income (loss), net of tax | (184) | (888) | (1,028) | 74
AOCI ending balance | (7,797) | (7,602) | (7,797) | (7,602)
Hedging relationships: |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
AOCI beginning balance | (1,903) | (1,781) | (1,493) | (2,182)
Other comprehensive income (loss) before reclassifications | (225) | (664) | (812) | (466)
Amounts reclassified from AOCI into earnings | 243 | 240 | 420 | 443
Other comprehensive income (loss), net of tax | 18 | (424) | (392) | (23)
AOCI ending balance | (1,885) | (2,205) | (1,885) | (2,205)
Foreign Currency Translation Adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
AOCI beginning balance | 13 | (7) | 26 | (20)
Other comprehensive income (loss) before reclassifications | (1) | 34 | (14) | 47
Amounts reclassified from AOCI into earnings | 0 | 0 | 0 | 0
Other comprehensive income (loss), net of tax | (1) | 34 | (14) | 47
AOCI ending balance | 12 | 27 | 12 | 27
Other: |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
AOCI beginning balance | (31) | (38) | (32) | (38)
Other comprehensive income (loss) before reclassifications | 0 | 0 | 1 | 0
Amounts reclassified from AOCI into earnings | 0 | 0 | 0 | 0
Other comprehensive income (loss), net of tax | 0 | 0 | 1 | 0
AOCI ending balance | (31) | (38) | (31) | (38)
Total |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
AOCI beginning balance | (9,534) | (8,540) | (8,268) | (9,916)
AOCI ending balance | (9,701) | (9,818) | (9,701) | (9,818)
Net investment hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Other comprehensive gain (loss) | $ 13 | $ (78) | $ 62 | $ (116)

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