Federal Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal Income Taxes [Abstract]
Federal rate	21.00%	35.00%
Deferred tax impact from the Tax Cut and Jobs Act	$ (19)	$ (1,322)
Dividends-received deduction	84	264	$ 182
Deferred tax asssets tax credits	0	76
Net operating loss carryforwards	1,300
Valuation allowance	0
Unrecognized tax benefits, that, if recognized, would impact income tax expense and effective tax rate	16	11
Recognized interest and penalty expense related to uncertain tax positions	0	0	$ (3)
Accrued interest and penalty expense related to unrecognized tax benefits	$ 0	$ 0