Income Taxes (U.S. Federal Statutory Rate) (Details)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. Federal statutory rate	21.00%	21.00%	35.00%
U.S. state and local income taxes—net of U.S. Federal income tax benefit	3.00%	2.30%	1.50%
Differences related to non-U.S. operations	3.00%	3.30%	(8.60%)
U.S. Tax Reform	0	(0.003)	0.174
Equity compensation	(1.30%)	(1.00%)	(2.60%)
Other	1.60%	0.30%	0.20%
Effective tax rate	27.30%	25.60%	42.90%

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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Percentage of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act.

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