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Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
AOCI beginning balance | $ (8,268) |  |
Other comprehensive income (loss) before reclassifications | (1,846) | $ 666 | $ (10,400)
Amounts reclassified from AOCI into earnings | 828 | 982 | 110
Other comprehensive income (loss), net of tax | (1,018) | 1,648 | (10,290)
AOCI ending balance | (9,286) | (8,268) |
Securities Available for Sale |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
AOCI beginning balance | (6,769) | (7,676) | 297
Other comprehensive income (loss) before reclassifications | (801) | 881 | (7,980)
Amounts reclassified from AOCI into earnings | 26 | 26 | 7
Other comprehensive income (loss), net of tax | (775) | 907 | (7,973)
AOCI ending balance | (7,544) | (6,769) | (7,676)
Hedging relationships: |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
AOCI beginning balance | (1,493) | (2,182) | 118
Other comprehensive income (loss) before reclassifications | (1,029) | (268) | (2,404)
Amounts reclassified from AOCI into earnings | 802 | 957 | 104
Other comprehensive income (loss), net of tax | (227) | 689 | (2,300)
AOCI ending balance | (1,720) | (1,493) | (2,182)
Foreign Currency Translation Adjustments |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
AOCI beginning balance | 26 | (20) | (21)
Other comprehensive income (loss) before reclassifications | (23) | 46 | 1
Amounts reclassified from AOCI into earnings | 0 | 0 | 0
Other comprehensive income (loss), net of tax | (23) | 46 | 1
AOCI ending balance | 3 | 26 | (20)
Other: |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
AOCI beginning balance | (32) | (38) | (20)
Other comprehensive income (loss) before reclassifications | 7 | 7 | (17)
Amounts reclassified from AOCI into earnings | 0 | (1) | (1)
Other comprehensive income (loss), net of tax | 7 | 6 | (18)
AOCI ending balance | (25) | (32) | (38)
Total |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
AOCI beginning balance | (8,268) | (9,916) | 374
AOCI ending balance | (9,286) | (8,268) | (9,916)
Net investment hedges |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Other comprehensive gain (loss) | $ 169 | $ (126) | $ 305

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