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Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies - Schedule of Effective Income Tax Rate Reconciliation (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	21.00%	35.00%	21.00%	35.00%	35.00%
Difference between foreign statutory rate and U.S. statutory rate	1.00%	(1.60%)	1.20%	(1.70%)
Excess tax benefits recognized on share-based compensation	(0.60%)	(1.00%)	(1.20%)	(2.50%)
Tax on global intangible low-taxed income under the provisions of the Tax Reform Act	0.90%		1.00%
Updates to the provisional amount recognized for the one-time mandatory deemed repatriation of Canadian earnings required by the Tax Reform Act			(0.90%)
Other	1.50%	2.10%	1.40%	1.90%
Effective tax rate	23.80%	34.50%	22.50%	32.70%

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Effective income tax rate reconciliation tax cuts and jobs act of 2017 transition tax on accumulated foreign earnings percent.

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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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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 attributable to changes in the income tax rates.

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