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Summary of Significant Accounting Policies - Additional information (Detail) $ in Millions	12 Months Ended
	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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Amount of recoverable preproduction engineering and design costs related to long term supply agreements capitalized during the reporting period.

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