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Summary of Significant Accounting Policies - Additional information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($) Segment | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Quarterly interim reporting period duration | 91 days |  |
Allowance for doubtful accounts | $ 34.4 | $ 27.5 |
Inventory reserves | 101.3 | 95.1 |
Capitalized pre-production E&D costs | 193.7 | 232.3 |
Capitalized pre-production tooling costs related to customer-owned tools | 121.0 | 177.7 |
Cash collected related to E&D and tooling costs | 266.4 | 395.8 |
Depreciation expense | 295.3 | 277.2 | $ 251.1
Capital expenditures recorded in accounts payable | 117.7 | 112.8 | 98.9
Restructuring charges | 81.1 | 107.0 | 75.4
Fixed asset impairment charges | 1.8 | 2.1 | 1.9
New product development costs | 126.8 | 102.0 | 108.4
Foreign currency transaction gain (loss) | (28.5) | (32.1) | (28.3)
Pretax income (loss) related to intercompany transactions for which settlement is not planned or anticipated in the foreseeable future | $ (10.7) | (18.7) | 4.7
Number of reportable operating segments | Segment | 2 |  |
Designated as hedging instrument | Foreign exchange |  |  |
Significant Accounting Policies [Line Items] |  |  |
Pre-tax reclassification adjustments, derivative instruments and hedging activities | $ 38.6 | (8.2) | (32.2)
Asset impairments |  |  |
Significant Accounting Policies [Line Items] |  |  |
Restructuring charges | $ 3.9 | $ 0.5 | $ 9.2

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