Income Taxes (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Income Taxes [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	35.00%
Income tax remeasurement from tax rate change		$ 3	$ (271)
Unrecognized tax benefits	$ 14	15	14	$ 13
Unrecognized tax benefits that would impact effective tax rate if recognized	13	14
GILTI, tax expense	1
Unrecognized tax benefits, reasonably possible decrease within the next 12 months	$ 2
Number of state tax authorities that are in the process of auditing state income tax returns of various subsidiaries | item	4
Accrued interest and penalties	$ 2	$ 2	$ 2
Effective tax rate on loss from discontinued operations (as a percent)	11.50%	26.00%	37.90%
Valuation allowance for deferred tax assets	$ 12	$ 11
Deferred tax assets, net of valuation allowance, for federal and state net operating loss and capital loss carryforwards	5
Deferred tax assets, net of valuation allowance, for federal and state credit carryforwards	1
Cumulative undistributed earnings of the Company’s foreign subsidiaries		74
Cash associated with indefinitely reinvested foreign earnings	$ 35	$ 30