Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	$ 41,243	$ 46,244
Other comprehensive income (loss)	(249)	(460)
Balance	40,414	41,350
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(2,341)	(1,864)
Other comprehensive income (loss)	(249)	(460)
Balance	(2,590)	(2,324)
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Tax	82	141
Securities and Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	832	171
Other comprehensive income (loss) before reclassifications, after-tax	(134)	104
Net amounts reclassified from AOCI to net income	34	17
Other comprehensive income (loss)	(100)	121
Balance	732	292
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income (loss), before reclassifications, tax	49	(39)
Reclassification adjustment, tax	(9)	(5)
Net long-duration insurance and contractholder liabilities measurement adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(2,038)	(971)
Other comprehensive income (loss)	(168)	(560)
Balance	(2,206)	(1,531)
Change in discount rate for certain long-duration liabilities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications, after-tax	(108)	(546)
Net amounts reclassified from AOCI to net income	(56)	0
Other comprehensive income (loss)	(164)	(546)
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income (loss), before reclassifications, tax	33	186
Reclassification adjustment, tax	16	0
Other Comprehensive Income (Loss), Tax	49	186
Change in instrument-specific credit risk for market risk benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications, after-tax	(4)	(14)
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income (loss), before reclassifications, tax	1	4
Translation of foreign currencies
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(198)	(149)
Other comprehensive income (loss) before reclassifications, after-tax	13	(26)
Balance	(185)	(175)
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income (loss), before reclassifications, tax	(6)	(2)
Postretirement benefits liability
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(937)	(915)
Net amounts reclassified from AOCI to net income	6	5
Balance	(931)	(910)
Other Comprehensive Income (Loss), Tax [Abstract]
Reclassification adjustment, tax	$ (2)	$ (3)