Deferred Policy Acquisition Costs, Value of Business Acquired and Other Policy-Related Intangibles (DAC and VOBA) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net [Abstract]
Beginning Balance of DAC	$ 3,870	$ 4,327	$ 4,518
Capitalizations of DAC	492	406	365
Net investment gains (losses) of DAC and net derivative gains (losses) of DAC	68	105	220
Other expenses of DAC	(179)	(776)	(586)
Total amortization of DAC	(111)	(671)	(366)
Unrealized investment gains (losses) of DAC	88	(192)	(190)
Ending Balance of DAC	4,339	3,870	4,327
Beginning Balance of VOBA	487	482	568
Net investment gains (losses) of VOBA and net derivative gains (losses) of VOBA	0	0	(1)
Other expenses of VOBA	6	(25)	(28)
Total amortization of VOBA	6	(25)	(29)
Unrealized investment gains (losses) of VOBA	19	30	(57)
Ending Balance of VOBA	512	487	482
Ending Balance of DAC and VOBA	$ 4,851	$ 4,357	$ 4,809