Investments (Net Inv Inc summary) (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investment income on fixed maturities	$ 344	$ 334	$ 697	$ 663
Net realized gains (losses)	0	5	4	11
Affordable housing partnerships	(17)	(14)	(32)	(25)
Other	16	43	48	89
Consolidated investment entities	25	51	48	77
Total	$ 368	$ 419	$ 765	$ 815