Investments - Investments - ACL on Fixed Maturities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Beginning balance			$ 0
Reduction due to intent to sell	$ 0	$ 0	(5,000,000)	$ 0
Ending balance	(32,000,000)		(32,000,000)
Corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Beginning balance	(12,000,000)		0
Credit losses on fixed maturities where credit losses were not previously recorded	(23,000,000)		(35,000,000)
Reduction due to sales	2,000,000		2,000,000
Net increases (decreases) in allowance on fixed maturities that had an allowance in a previous period	1,000,000		1,000,000
Ending balance	$ (32,000,000)		$ (32,000,000)