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Summary of Segment Financial Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 29, 2014 | Mar. 30, 2013 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from external customers | $ 4,359.8 |  | $ 3,947.1 |  |
Segment earnings | 215.3 | [1] | 174.2 | [1] |
Depreciation and amortization | 74.5 |  | 66.4 |  |
Capital expenditures | 96.4 |  | 98.7 |  |
Total assets | 8,998.2 | [2] | 8,824.2 |  | 8,330.9
Operating Segments | Seating |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from external customers | 3,225.9 |  | 2,911.7 |  |
Segment earnings | 152.2 | [1] | 141.4 | [1] |
Depreciation and amortization | 47.6 |  | 42.6 |  |
Capital expenditures | 73.9 |  | 67.5 |  |
Total assets | 5,417.5 |  | 4,744.1 |  |
Operating Segments | Electrical |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues from external customers | 1,133.9 |  | 1,035.4 |  |
Segment earnings | 138.3 | [1] | 89.0 | [1] |
Depreciation and amortization | 25.0 |  | 21.9 |  |
Capital expenditures | 21.6 |  | 30.3 |  |
Total assets | 1,808.7 |  | 1,565.0 |  |
Corporate and regional headquarters and elimination of intercompany activity ("Other") |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment earnings | (75.2) | [1] | (56.2) | [1] |
Depreciation and amortization | 1.9 |  | 1.9 |  |
Capital expenditures | 0.9 |  | 0.9 |  |
Total assets | $ 1,772.0 |  | $ 2,515.1 |  |
[1] | See definition above
[2] | Unaudited.

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