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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |  |
Tax benefit adjustment to the provisional income tax expense | $ 5.3 |  |  |
Unrecognized net operating loss carryforwards, foreign | 7.1 | $ 11.5 | $ 5.4 |
Foreign jurisdictions income with tax holidays | 107.1 | 124.1 | 89.7 |
Income Taxes [Line Items] |  |  |  |
Valuation allowance for deferred tax assets | 350.4 | 402.2 |  |
Net decrease in valuation allowance | 51.8 |  |  |
Tax loss carryforwards | 1,800.0 |  |  |
Tax loss carryforwards with no expiration date | 1,500.0 |  |  |
Tax loss carryforwards with expiration date | 292.1 |  |  |
Tax credit carryforwards | 260.6 |  |  |
Deferred tax asset | 445.5 | 555.4 |  |
Retained earnings | 4,113.6 | 4,171.9 |  |
Unrecognized tax benefits | 36.7 | 33.2 | 29.5 | $ 30.4
Unrecognized tax benefits, interest and penalties | 11.8 | 9.9 |  |
Decrease in unrecognized tax benefits, reasonably possible during the next twelve months | 4.2 |  |  |
U.S. |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation allowance for deferred tax assets | 16.0 |  |  |
International jurisdictions |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation allowance for deferred tax assets | $ 334.4 |  |  |
Accounting Standards Update 2016-16 |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset |  | 2.3 |  |
Retained earnings |  | $ 2.3 |  |
Accounting Standards Update 2016-09 |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset |  |  | 52.9 |
Retained earnings |  |  | $ 52.9 |

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- Definition Tax Cuts And Jobs Act Of 2017, Measurement Period Adjustment, Income Tax Expense (Benefit) + References No definition available. + Details
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- Definition Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
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- Definition Amount 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 income exempt from income tax because of a tax holiday. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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