Income Tax (Reconciliation of Income Tax Provision between US Statutory Rate and As Reported for Continuing Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income tax expense benefit continuing operations income tax reconciliation
Tax provision at statutory rate	$ (241)	$ 235	$ (567)
Excess loss account - Separation from MetLife (1)	0	(2)	1,088
Rate revaluation due to tax reform (2)	0	0	(696)
Dividend received deduction	(38)	(40)	(116)
Prior year tax	0	(1)	(4)
Tax credits	(29)	(24)	(29)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	0	(11)	0
Goodwill impairment	0	0	(288)
Sale of subsidiary	0	0	(136)
Other, net	(30)	(4)	10
Provision for income tax expense (benefit)	$ (338)	$ 153	$ (738)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	30.00%	14.00%	46.00%