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]
General and administrative expenses (1)	$ 541	$ 645	$ 1,673	$ 1,844
Pension, postretirement and postemployment benefit costs	8	26	25	78
Premium taxes, other taxes, and licenses & fees	105	66	297	219
Commissions and other variable expenses	445	462	1,367	1,357
Capitalization of DAC	(7)	(13)	(30)	(42)
Amortization of DAC and VOBA	244	84	331	144
Interest expense on debt	24	27	75	80
Total other expenses	1,360	1,297	3,738	3,680
Net change in cash surrender value of investments, net of premiums paid	$ (34)	$ (32)	$ (59)	$ (133)