Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Income before income taxes, foreign		$ 83	$ 62	$ 71
Foreign earnings repatriated	$ 135
Undistributed earnings of foreign subsidiaries amount	840	840
Federal Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	759	759
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	744	744
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 3	$ 3