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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2017 | Oct. 01, 2016 | Jan. 01, 2017
Income Tax Contingency [Line Items] |  |  |  |
Tax benefits |  | $ (68.4) |  |
Tax benefits, release of valuation allowances with respect to deferred tax assets of certain foreign subsidiaries |  | 28.7 |  |
Tax benefits, share-based compensation |  | 16.3 |  |
Redemption of the 2023 Notes |  | 7.5 |  |
Tax benefits, restructuring charges and various other items |  | $ 15.9 | $ 14.5 |
Consolidation of affiliate, revaluation gain |  |  | $ 30.3 |
U.S. federal statutory income tax rate |  | 35.00% | 35.00% |
Excess foreign tax credit | $ 300.0 | $ 300.0 |  |
Shanghai Lear Stec Automotive Parts Co Limited |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Consolidation of affiliate, revaluation gain | $ 54.2 |  |  |
Accounting Standards Update 2016-09 |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Deferred tax asset recognized |  |  |  | $ 54.5

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- Definition In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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