Other Revenues and Other Expenses (Other Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Income and Expenses [Abstract]
Compensation	$ 85	$ 76	$ 247	$ 238
Contracted services and other labor costs	56	73	202	185
Transition services agreements	37	64	90	196
Establishment costs	19	13	72	85
Premium and other taxes, licenses and fees	11	15	37	35
Separate account fees	118	123	343	365
Volume related costs, excluding compensation, net of DAC capitalization	155	155	445	472
Interest expense on debt	47	49	139	144
Other	52	43	99	104
Total operating expenses	$ 580	$ 611	$ 1,674	$ 1,824