Investments - Schedule of Investment Related Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Investments, All Other Investments [Abstract]
Gross realized gains on investment activity	$ 745	$ 1,521	$ 867	$ 2,232
Gross realized losses on investment activity	(422)	(142)	(1,060)	(377)
Net realized investment gains (losses) on AFS securities	323	1,379	(193)	1,855
Net recognized investment gains (losses) on trading securities	64	261	(181)	341
Net recognized investment gains (losses) on equity securities	1	36	(30)	51
Net recognized investment gains (losses) on mortgage loans	(588)	785	(1,344)	1,799
Net derivative gains (losses)	2,633	(1,075)	1,692	(2,587)
Provision for credit losses	(15)	(56)	(13)	(64)
Other gains (losses), net	571	(1,335)	980	(2,228)
Investment related gains (losses)	$ 2,989	$ (5)	$ 911	$ (833)
Derivative, gain (loss), statement of income or comprehensive income	Net gains (losses) from investment activities	Net gains (losses) from investment activities	Net gains (losses) from investment activities	Net gains (losses) from investment activities

Amount of increase (decrease) in allowance for credit loss of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Indicates line item in statement of income or comprehensive income that includes gain (loss) from derivative.

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Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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Amount of gain (loss) included in earnings for investments classified as other.

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Amount of realized gain (loss) on investment.

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