Income Taxes (Reconciliation of Statutory to Effective Income Tax Rate) (Details)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Statutory U.S. federal income tax rate	21.00%	35.00%
Increase (decrease) in rate due to:
Non-U.S. income tax differential	19.90%	1.20%
U.S. state and local income taxes, net of related U.S. federal income taxes	22.60%	0.10%
U.S. federal credits	(9.80%)	0.30%
Permanent adjustments	27.70%	0.60%
Foreign withholding taxes	75.90%	(2.00%)
Valuation allowance	143.50%	(4.40%)
Unrecognized tax benefits	48.40%	(3.90%)
Impact of foreign exchange	71.60%	(1.60%)
Impact of legislative changes	0.00%	(8.70%)
Goodwill impairment	0.00%	(36.00%)
Other	25.60%	(1.00%)
Consolidated effective income tax rate	446.40%	(20.40%)

Effective Income Tax Rate Reconciliation, Foreign Withholding Taxes

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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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