Revenue from Contract with Customer (Disaggregation) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Revenues
Revenue from contracts with customers		$ 147	$ 149	$ 293	$ 292
Revenue from other sources	[1]	705	806	1,528	1,607
Total revenues		852	955	1,821	1,899
Receivables related to revenues from contracts with customers		53		53		$ 55
Policy and contract charges [Member]
Revenues
Revenue from contracts with customers		46	45	90	90
Policy and contract charges [Member] | Affiliated [Member]
Revenues
Revenue from contracts with customers		42	42	83	83
Policy and contract charges [Member] | Unaffiliated [Member]
Revenues
Revenue from contracts with customers		4	3	7	7
Other revenues: Administrative Fees [Member]
Revenues
Revenue from contracts with customers		16	17	31	31
Other revenues: Administrative Fees [Member] | Affiliated [Member]
Revenues
Revenue from contracts with customers		10	11	21	21
Other revenues: Administrative Fees [Member] | Unaffiliated [Member]
Revenues
Revenue from contracts with customers		6	6	10	10
Other revenues: Other fees [Member]
Revenues
Revenue from contracts with customers		85	87	172	171
Other revenues: Other fees [Member] | Affiliated [Member]
Revenues
Revenue from contracts with customers		84	86	170	169
Other revenues: Other fees [Member] | Unaffiliated [Member]
Revenues
Revenue from contracts with customers		1	1	2	2
Total [Member]
Revenues
Revenue from contracts with customers		$ 101	$ 104	$ 203	$ 202

[1] Amounts primarily consist of revenue associated with insurance and annuity products or financial instruments.