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Segment Reporting - Summary of Segment Financial Information (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues from external customers	$ 4,724.6	$ 4,330.3	$ 4,635.1	$ 4,521.4	$ 4,549.7	$ 4,232.7	$ 4,585.1	$ 4,359.8	$ 18,211.4	$ 17,727.3	$ 16,234.0
Segment earnings									1,186.8	929.2	736.6
Depreciation and amortization									347.8	310.9	285.5
Capital expenditures									485.8	424.7	460.6
Total assets	9,405.8				9,113.1				9,405.8	9,113.1
Operating segments
Segment Reporting Information [Line Items]
Segment earnings									1,461.4	1,211.8	991.2
Operating segments | Seating
Segment Reporting Information [Line Items]
Revenues from external customers									14,098.5	13,310.6	12,018.1
Segment earnings									907.0	655.2	576.9
Depreciation and amortization									239.3	199.8	181.3
Capital expenditures									317.2	268.9	288.5
Total assets	5,780.7				4,855.6				5,780.7	4,855.6
Operating segments | Electrical
Segment Reporting Information [Line Items]
Revenues from external customers									4,112.9	4,416.7	4,215.9
Segment earnings									554.4	556.6	414.3
Depreciation and amortization									99.3	103.3	96.4
Capital expenditures									134.4	138.4	163.4
Total assets	1,572.9				1,609.9				1,572.9	1,609.9
Other
Segment Reporting Information [Line Items]
Revenues from external customers									0.0	0.0	0.0
Segment earnings									(274.6)	(282.6)	(254.6)
Depreciation and amortization									9.2	7.8	7.8
Capital expenditures									34.2	17.4	$ 8.7
Total assets	$ 2,052.2				$ 2,647.6				$ 2,052.2	$ 2,647.6

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.18)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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