Derivative Instruments and Hedging Activities - Effect of Cash Flow Hedge Derivatives (Details) $ in Millions	3 Months Ended
Mar. 31, 2026 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 49,425
Balance at end of period	49,234
Interest rate swaps \| AOCI, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	49
Gain (loss) recognized in other comprehensive income	(225)
Realized (gain) loss reclassified from AOCI to interest revenue	18
Balance at end of period	$ (158)

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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+ Details