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Segment Reporting - Summary of Segment Financial Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 27, 2015 | Jun. 28, 2014 | Jun. 27, 2015 | Jun. 28, 2014 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenues from external customers | $ 4,635.1 |  | $ 4,585.1 | $ 9,156.5 |  | $ 8,944.9 |
Segment earnings | 285.5 |  | 232.8 | 546.2 |  | 448.1 |
Depreciation and amortization | 84.9 |  | 78.2 | 169.4 |  | 152.7 |
Capital expenditures | 114.1 |  | 92.6 | 212.9 |  | 189.1 |
Total assets | 9,825.4 | [1] | 8,961.8 | 9,825.4 | [1] | 8,961.8 | $ 9,150.2
Operating segments | Seating |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenues from external customers | 3,577.7 |  | 3,443.6 | 7,062.7 |  | 6,669.5 |
Segment earnings | 214.5 |  | 164.2 | 410.6 |  | 316.4 |
Depreciation and amortization | 58.6 |  | 50.4 | 116.9 |  | 97.9 |
Capital expenditures | 85.4 |  | 55.6 | 156.9 |  | 129.5 |
Total assets | 6,302.5 |  | 5,415.4 | 6,302.5 |  | 5,415.4 |
Operating segments | Electrical |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenues from external customers | 1,057.4 |  | 1,141.5 | 2,093.8 |  | 2,275.4 |
Segment earnings | 141.9 |  | 138.3 | 278.9 |  | 276.6 |
Depreciation and amortization | 24.1 |  | 25.9 | 48.2 |  | 50.9 |
Capital expenditures | 23.5 |  | 35.7 | 48.8 |  | 57.4 |
Total assets | 1,657.7 |  | 1,797.5 | 1,657.7 |  | 1,797.5 |
Other |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenues from external customers | 0.0 |  | 0.0 | 0.0 |  | 0.0 |
Segment earnings | (70.9) |  | (69.7) | (143.3) |  | (144.9) |
Depreciation and amortization | 2.2 |  | 1.9 | 4.3 |  | 3.9 |
Capital expenditures | 5.2 |  | 1.3 | 7.2 |  | 2.2 |
Total assets | $ 1,865.2 |  | $ 1,748.9 | $ 1,865.2 |  | $ 1,748.9 |
[1] | Unaudited.

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