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Investments in Affiliates and Other Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified					3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011 TS Lear Automotive Sdn Bhd. (Malaysia)	Mar. 31, 2011 TS Lear Automotive Sdn Bhd. (Malaysia)	Mar. 30, 2013 International Automotive Components Group North America, LLC	Dec. 31, 2012 International Automotive Components Group North America, LLC	Dec. 31, 2011 International Automotive Components Group North America, LLC
Related Party Transaction [Line Items]
Investment in Affiliates	$ 172.0	$ 177.8
Due From Affiliates	74.2	45.4
Due to Affiliates	8.8	22.7
Percentage of ownership interest sold					22.88%
Proceeds from sale of equity investments					$ 49.6
Equity method investment ownership interest acquired				44.00%
Equity method investment ownership interest			90.00%			23.00%	23.00%

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