Other Revenues and Other Expenses (Other Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Income and Expenses [Abstract]
Compensation	$ 85	$ 73
Contracted services and other labor costs	53	61
Transition services agreements	30	36
Establishment costs	16	40
Premium and other taxes, licenses and fees	13	11
Volume related costs, excluding compensation, net of DAC capitalization	158	122
Interest expense on debt	17	17
Other	52	50
Total other expenses	$ 424	$ 410