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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Mar. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |
Provisional tax expense for the impact of remeasurement of deferred tax inventory |  | $ 84.3
US federal corporate tax rate | 21.00% |
Provisional transition tax liability net of foreign tax credits |  | 36.6
Unrecognized tax benefits | $ 5.5 | 7.1
Accrued interest and penalties related to uncertain tax positions | $ 1.7 | $ 2.7

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- Definition Tax cuts and jobs act of 2017 provisional transition tax on deemed repatriated earnings of foreign subsidiaries net of foreign tax credits. + References No definition available. + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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