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Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Income before income taxes, foreign	$ 62	$ 71	$ 48
Undistributed earnings of foreign subsidiaries amount	726
Valuation allowance	43	$ 46
Federal Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1,217
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	994
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	15
Tax credit carryforward	$ 22		$ 26