Investments (Net Inv Inc summary) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investment income on fixed maturities	$ 290		$ 344	$ 612		$ 697
Net realized gains (losses)	(3)	[1]	0	(22)	[1]	4
Affordable housing partnerships	(22)		(17)	(36)		(32)
Other	23		16	45		48
Consolidated investment entities	17		25	34		48
Net investment income	305		$ 368	633		$ 765
Allowance for Credit Loss	$ 28			$ 28			$ 4

[1] Includes the change in the allowance for credit losses of $(4) million and $(28) million for the three months and six months ended June 30, 2020, respectively.