Equity - Schedule of Other Comprehensive Income (Loss) Reclassification Adjustments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Other Comprehensive Income (Loss) Reclassification Adjustments
Other comprehensive income	$ 502	$ 1,847	$ 2,054	$ 7,484
AOCI Including Portion Attributable to Noncontrolling Interest
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	416	1,967	1,420	217
Less: Reclassification adjustments included in net income	(111)	(92)	(539)	(7,591)
Total other comprehensive income (loss), before of income tax expense (benefit)	527	2,059	1,959	7,808
Less: Income tax expense (benefit)	25	212	(95)	324
Other comprehensive income	502	1,847	2,054	7,484
Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which Allowance for Credit Losses Was Taken
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	0	45	(3)	98
Less: Reclassification adjustments included in net income	0	0	0	(42)
Total other comprehensive income (loss), before of income tax expense (benefit)	0	45	(3)	140
Less: Income tax expense (benefit)	0	8	(1)	20
Other comprehensive income	0	37	(2)	120
Unrealized Appreciation (Depreciation) of All Other Investments
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	461	1,514	875	(1,129)
Less: Reclassification adjustments included in net income	(102)	(84)	(515)	(8,867)
Total other comprehensive income (loss), before of income tax expense (benefit)	563	1,598	1,390	7,738
Less: Income tax expense (benefit)	16	249	(74)	92
Other comprehensive income	547	1,349	1,464	7,646
Change in Fair Value of Market Risk Benefits Attributable to Changes in Our Own Credit Risk
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	0	0	0	130
Less: Reclassification adjustments included in net income	0	0	0	(330)
Total other comprehensive income (loss), before of income tax expense (benefit)	0	0	0	460
Less: Income tax expense (benefit)	0	0	0	28
Other comprehensive income	0	0	0	432
Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	7	(12)	16	947
Less: Reclassification adjustments included in net income	0	0	0	1,583
Total other comprehensive income (loss), before of income tax expense (benefit)	7	(12)	16	(636)
Less: Income tax expense (benefit)	2	(58)	4	166
Other comprehensive income	5	46	12	(802)
Foreign Currency Translation Adjustments
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(52)	427	537	173
Less: Reclassification adjustments included in net income	0	0	0	88
Total other comprehensive income (loss), before of income tax expense (benefit)	(52)	427	537	85
Less: Income tax expense (benefit)	4	13	(30)	14
Other comprehensive income	(56)	414	567	71
Retirement Plan Liabilities Adjustment
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	0	(7)	(5)	(2)
Less: Reclassification adjustments included in net income	(9)	(8)	(24)	(23)
Total other comprehensive income (loss), before of income tax expense (benefit)	9	1	19	21
Less: Income tax expense (benefit)	3	0	6	4
Other comprehensive income	$ 6	$ 1	$ 13	$ 17