Income Taxes - Components of the deferred income tax assets and liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Deferred reinsurance gain	$ 6	$ 7
Other assets	1	1
Total deferred tax assets	7	8
Life and annuity reserves	(253)	(223)
Unrealized net capital gains	(245)	(65)
Investments	(185)	(131)
DAC	(169)	(201)
Other liabilities	(49)	(51)
Total deferred tax liabilities	(901)	(671)
Net deferred tax liability	$ (894)	$ (663)