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Segment Reporting - Summary of Segment Financial Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 26, 2015 | Sep. 27, 2014 | Sep. 26, 2015 | Sep. 27, 2014 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenues from external customers | $ 4,330.3 |  | $ 4,232.7 | $ 13,486.8 |  | $ 13,177.6 |
Segment earnings | 302.6 |  | 224.5 | 848.8 |  | 672.6 |
Depreciation and amortization | 88.0 |  | 79.9 | 257.4 |  | 232.6 |
Capital expenditures | 114.8 |  | 91.7 | 327.7 |  | 280.8 |
Total assets | 9,638.7 | [1] | 8,691.2 | 9,638.7 | [1] | 8,691.2 | $ 9,150.2
Operating segments | Seating |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenues from external customers | 3,357.1 |  | 3,188.4 | 10,419.8 |  | 9,857.9 |
Segment earnings | 234.2 |  | 154.9 | 644.8 |  | 471.3 |
Depreciation and amortization | 60.2 |  | 50.8 | 177.1 |  | 148.7 |
Capital expenditures | 75.6 |  | 63.3 | 232.5 |  | 192.8 |
Total assets | 6,132.9 |  | 5,223.9 | 6,132.9 |  | 5,223.9 |
Operating segments | Electrical |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenues from external customers | 973.2 |  | 1,044.3 | 3,067.0 |  | 3,319.7 |
Segment earnings | 132.6 |  | 136.7 | 411.5 |  | 413.3 |
Depreciation and amortization | 25.4 |  | 27.1 | 73.6 |  | 78.0 |
Capital expenditures | 26.7 |  | 24.8 | 75.5 |  | 82.2 |
Total assets | 1,674.6 |  | 1,702.9 | 1,674.6 |  | 1,702.9 |
Other |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenues from external customers | 0.0 |  | 0.0 | 0.0 |  | 0.0 |
Segment earnings | (64.2) |  | (67.1) | (207.5) |  | (212.0) |
Depreciation and amortization | 2.4 |  | 2.0 | 6.7 |  | 5.9 |
Capital expenditures | 12.5 |  | 3.6 | 19.7 |  | 5.8 |
Total assets | $ 1,831.2 |  | $ 1,764.4 | $ 1,831.2 |  | $ 1,764.4 |
[1] | Unaudited.

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