Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 442	$ 905	$ 887	$ 1,154
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in net unrealized gain (loss) on fixed maturities	(1,592)	295	(3,474)	(630)
Changes in net gain on cash flow hedging instruments	25	(5)	24	0
Change in foreign currency translation adjustments	(8)	2	(8)	3
Changes in pension and other postretirement plan adjustments	(12)	(14)	(24)	(27)
Other comprehensive income (loss), net of tax	(1,563)	306	(3,434)	(600)
Comprehensive income (loss)	$ (1,121)	$ 1,211	$ (2,547)	$ 554