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Income Taxes (Summary of Taxes on Financial Statements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
(Provision) Benefit for income taxes	$ (59)	$ (86)	$ 193
Shareholders' equity, foreign currency translation adjustment	1	(2)	6
Shareholders' equity, pension and post-retirement benefits	11	(14)	(27)
Shareholders' equity, changes in fair value of derivatives	2	3	0
Total income taxes	$ (45)	$ (99)	$ 172

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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