Deferred Acquisition Costs, Deferred Sales Inducements and Value of Business Acquired - Roll Forward of DAC, DSI, and VOBA (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
DAC
Beginning balance			$ 3,274	$ 3,921
Additions			470	521
Deferred Policy Acquisition Cost, Amortization Expense, Assumption Change			(36)	(117)
Amortization			(175)	(637)
Impact of unrealized investment (gains) losses			(116)	(458)
Ending balance	$ 3,429	$ 3,230	3,429	3,230
DSI
Beginning balance			820	799
Additions			124	187
Deferred Sales Inducement Cost, Amortization Expense, Assumption Change			(13)	(9)
Deferred sales inducement amortization expense excluding unlocking			(24)	(29)
Amortization	(48)	(20)	(37)	(38)
Impact of unrealized investment (gains) losses			(45)	(141)
Ending balance	867	807	867	807
VOBA
Beginning balance			914	1,187
Additions			0	0
Present Value of Future Insurance Profits, Amortization Expense, Assumption Change			(11)	(24)
Amortization			(25)	(37)
Impact of unrealized investment (gains) losses			(14)	(203)
Ending balance	869	923	869	923
Total
Beginning balance			5,008	5,907
Additions			594	708
Unlocking			(60)	(150)
Amortization			(224)	(703)
Impact of unrealized investment (gains) losses			(175)	(802)
Ending balance	$ 5,165	$ 4,960	5,165	$ 4,960
Accounting Standards Update 2016-13 [Member]
DAC
Deferred Policy Acquisition Costs, Period Increase (Decrease)			12
DSI
Deferred Sales Inducements, Period Increase (Decrease)			5
VOBA
Present Value of Future Insurance Profits, Period Increase (Decrease)			5
Total
Additions			$ 22