Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 0	$ 0
Interest income (expense)	0	0	$ 0
Income tax penalties expense	0	0	0
Accrued interest and penalties	0	0
Net deferred tax asset remeasurement	(6,000,000)	83,000,000
Net deferred tax asset remeasurement	6,000,000	(83,000,000)	0
Deferred tax liability on undistributed income related to a foreign subsidiary	0
Foreign tax expense (benefit) on income from continuing operations	(5,000,000)	1,000,000	(9,000,000)
Income (loss) from continuing foreign operations	22,000,000	39,000,000	51,000,000
Operating loss carryforwards	0
Valuation allowance	0	0
Federal Income Taxes
Income Tax Contingency [Line Items]
Related party transaction, amounts of transaction	$ 275,000,000	$ 127,000,000	$ 142,000,000