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Summary of Significant Accounting Policies - Summary of Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Goodwill [Roll Forward] |  |
Beginning balance | $ 726.2 | $ 757.2
Acquisitions | 370.7 |
Foreign currency translation and other | (43.1) | (31.0)
Ending balance | 1,053.8 | 726.2
Seating |  |
Goodwill [Roll Forward] |  |
Beginning balance | 726.2 | 757.2
Acquisitions | 343.7 |
Foreign currency translation and other | (43.1) | (31.0)
Ending balance | 1,026.8 | 726.2
Electrical |  |
Goodwill [Roll Forward] |  |
Beginning balance | 0.0 | 0.0
Acquisitions | 27.0 |
Foreign currency translation and other | 0.0 | 0.0
Ending balance | $ 27.0 | $ 0.0

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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