Segment Reporting - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Segment Reporting Information [Line Items]
Reportable operating segments			2
Restructuring charges			$ 86.6
Operating segments | Seating
Segment Reporting Information [Line Items]
Restructuring charges	17.0	10.9	68.8	29.8
Operating segments | Electrical
Segment Reporting Information [Line Items]
Restructuring charges	2.5	0.6	7.3	7.8
Corporate and regional headquarters and elimination of intercompany activity ("Other")
Segment Reporting Information [Line Items]
Restructuring charges	$ 1.5	$ 0.2	$ 10.5	$ 5.3