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Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Valuation allowances	$ 200	$ 207
Increase (decrease) in valuation allowance	(7)	(10)
Income from foreign sources	824
Income from domestic sources	432
Undistributed earnings of foreign subsidiaries	2,300
Unrecognized tax benefits	83
Decrease in unrecognized tax benefits	35
Income tax penalties and interest accrued	23	19
Income tax penalties and interest expense	3	(1)	$ 5
Due to former parent upon receipt from IRS	5	5
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance	$ 90	96	163
Federal Deferred Tax Asset
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance			(223)
Foreign Tax Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance		$ (17)	(152)
Other Net Deferred Tax Assets
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance			$ (71)

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