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Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
AOCI beginning balance | $ (8,268) |
Other comprehensive income (loss) before reclassifications | (1,443) | $ 1,173
Amounts reclassified from AOCI into earnings | 177 | 203
Other comprehensive income (loss), net of tax | (1,266) | 1,376
AOCI ending balance | (9,534) |
Securities Available for Sale |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
AOCI beginning balance | (6,769) | (7,676)
Other comprehensive income (loss) before reclassifications | (844) | 962
Amounts reclassified from AOCI into earnings | 0 | 0
Other comprehensive income (loss), net of tax | (844) | 962
AOCI ending balance | (7,613) | (6,714)
Hedging relationships: |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
AOCI beginning balance | (1,493) | (2,182)
Other comprehensive income (loss) before reclassifications | (587) | 198
Amounts reclassified from AOCI into earnings | 177 | 203
Other comprehensive income (loss), net of tax | (410) | 401
AOCI ending balance | (1,903) | (1,781)
Foreign Currency Translation Adjustments |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
AOCI beginning balance | 26 | (20)
Other comprehensive income (loss) before reclassifications | (13) | 13
Amounts reclassified from AOCI into earnings | 0 | 0
Other comprehensive income (loss), net of tax | (13) | 13
AOCI ending balance | 13 | (7)
Other: |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
AOCI beginning balance | (32) | (38)
Other comprehensive income (loss) before reclassifications | 1 | 0
Amounts reclassified from AOCI into earnings | 0 | 0
Other comprehensive income (loss), net of tax | 1 | 0
AOCI ending balance | (31) | (38)
Total |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
AOCI beginning balance | (8,268) | (9,916)
AOCI ending balance | (9,534) | (8,540)
Net investment hedges |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Other comprehensive gain (loss) | $ 49 | $ (38)

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