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	$ 13,446	$ 14,790	$ 15,570
Capitalization of DAC	2,718	3,013	3,358
Net investment gains (losses) of DAC and net derivative gains (losses) of DAC	(100)	(152)	(117)
Other expenses of DAC	(2,268)	(2,773)	(2,534)
Total amortization of DAC	(2,368)	(2,925)	(2,651)
Unrealized investment gains (losses) of DAC	811	(1,312)	(1,461)
Effect of foreign currency translation and other of DAC	(861)	76	(26)
Reclassified to assets held-for-sale (1)	(103)	(196)	0
Ending Balance of DAC	13,643	13,446	14,790
Beginning Balance of VOBA	2,943	3,043	3,325
Net investment gains (losses) of VOBA and net derivative gains (losses) of VOBA	0	(2)	0
Other expenses of VOBA	(187)	(233)	(245)
Total amortization of VOBA	(187)	(235)	(245)
Unrealized investment gains (losses) of VOBA	11	(4)	(4)
Effect of foreign currency translation and other of VOBA	(314)	139	(33)
Reclassified to assets held-for-sale (1)	(35)	0	0
Ending Balance of VOBA	2,418	2,943	3,043
Balance at December 31,	$ 16,061	$ 16,389	$ 17,833