Investments - Net Investment Income (Details) - Consolidated Entity Excluding Variable Interest Entities (VIE) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Net Investment Income [Line Items]
Investment revenue	$ 5,754	$ 5,071	$ 16,391	$ 14,302
Investment expenses	(431)	(399)	(1,311)	(1,210)
Net investment income	5,323	4,672	15,080	13,092
AFS securities
Net Investment Income [Line Items]
Investment revenue	3,309	3,029	9,509	8,584
Trading securities
Net Investment Income [Line Items]
Investment revenue	150	90	414	198
Equity securities
Net Investment Income [Line Items]
Investment revenue	9	18	37	62
Mortgage loans
Net Investment Income [Line Items]
Investment revenue	1,615	1,397	4,747	3,782
Investment funds
Net Investment Income [Line Items]
Investment expenses	122	37	134	206
Funds withheld at interest
Net Investment Income [Line Items]
Investment revenue	255	232	692	741
Other Investments
Net Investment Income [Line Items]
Investment revenue	$ 294	$ 268	$ 858	$ 729

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Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

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Amount of expenses related to the generation of investment income.

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Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

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