Segment Reporting - Summary of Segment Financial Information (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues from external customers	$ 4,643.5	$ 4,526.4	$ 4,724.8	$ 4,662.9	$ 4,724.6	$ 4,330.3	$ 4,635.1	$ 4,521.4	$ 18,557.6	$ 18,211.4	$ 17,727.3
Segment earnings									1,427.2	1,186.8	929.2
Depreciation and amortization									378.2	347.8	310.9
Capital expenditures									528.3	485.8	424.7
Total assets	9,900.6				9,405.8				9,900.6	9,405.8
Operating segments
Segment Reporting Information [Line Items]
Segment earnings									1,727.3	1,461.4	1,211.8
Operating segments | Seating
Segment Reporting Information [Line Items]
Revenues from external customers									14,356.7	14,098.5	13,310.6
Segment earnings									1,136.0	907.0	655.2
Depreciation and amortization									258.1	239.3	199.8
Capital expenditures									341.6	317.2	268.9
Total assets	6,199.2				5,780.7				6,199.2	5,780.7
Operating segments | E-Systems
Segment Reporting Information [Line Items]
Revenues from external customers									4,200.9	4,112.9	4,416.7
Segment earnings									591.3	554.4	556.6
Depreciation and amortization									107.6	99.3	103.3
Capital expenditures									162.4	134.4	138.4
Total assets	1,675.9				1,572.9				1,675.9	1,572.9
Other
Segment Reporting Information [Line Items]
Revenues from external customers									0.0	0.0	0.0
Segment earnings									(300.1)	(274.6)	(282.6)
Depreciation and amortization									12.5	9.2	7.8
Capital expenditures									24.3	34.2	$ 17.4
Total assets	$ 2,025.5				$ 2,052.2				$ 2,025.5	$ 2,052.2