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Summary of Segment Financial Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Dec. 31, 2012 | Sep. 29, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from external customers | $ 4,256.1 | $ 3,917.7 | $ 4,113.1 | $ 3,947.1 | $ 3,719.4 | $ 3,538.6 | $ 3,665.0 | $ 3,644.0 | $ 16,234.0 |  | $ 14,567.0 |  | $ 14,156.5 |
Segment earnings |  |  |  |  |  |  |  |  | 736.6 | [1] | 705.2 | [1] | 679.6 | [1]
Depreciation and amortization |  |  |  |  |  |  |  |  | 285.5 |  | 239.5 |  | 246.3 |
Capital expenditures |  |  |  |  |  |  |  |  | 460.6 |  | 458.3 |  | 329.5 |
Total assets | 8,330.9 |  |  |  | 8,194.1 |  |  |  | 8,330.9 |  | 8,194.1 |  | 7,010.9 |
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment earnings |  |  |  |  |  |  |  |  | 991.2 |  | 916.6 |  | 888.8 |
Operating Segments | Seating |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  |  |  |  |  |  |  |  | 12,018.1 |  | 11,029.6 |  | 10,943.0 |
Segment earnings |  |  |  |  |  |  |  |  | 576.9 | [1] | 661.7 | [1] | 703.7 | [1]
Depreciation and amortization |  |  |  |  |  |  |  |  | 181.3 |  | 152.6 |  | 146.5 |
Capital expenditures |  |  |  |  |  |  |  |  | 288.5 |  | 290.7 |  | 184.0 |
Total assets | 4,640.0 |  |  |  | 4,341.9 |  |  |  | 4,640.0 |  | 4,341.9 |  | 3,697.9 |
Operating Segments | Electrical |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  |  |  |  |  |  |  |  | 4,215.9 |  | 3,537.4 |  | 3,213.5 |
Segment earnings |  |  |  |  |  |  |  |  | 414.3 | [1] | 254.9 | [1] | 185.1 | [1]
Depreciation and amortization |  |  |  |  |  |  |  |  | 96.4 |  | 78.4 |  | 92.3 |
Capital expenditures |  |  |  |  |  |  |  |  | 163.4 |  | 158.1 |  | 139.4 |
Total assets | 1,658.3 |  |  |  | 1,432.2 |  |  |  | 1,658.3 |  | 1,432.2 |  | 1,255.0 |
Corporate and regional headquarters and elimination of intercompany activity ("Other") |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment earnings |  |  |  |  |  |  |  |  | (254.6) | [1] | (211.4) | [1] | (209.2) | [1]
Depreciation and amortization |  |  |  |  |  |  |  |  | 7.8 |  | 8.5 |  | 7.5 |
Capital expenditures |  |  |  |  |  |  |  |  | 8.7 |  | 9.5 |  | 6.1 |
Total assets | $ 2,032.6 |  |  |  | $ 2,420.0 |  |  |  | $ 2,032.6 |  | $ 2,420.0 |  | $ 2,058.0 |
[1] | See definition in Note 2, "Summary of Significant Accounting Policies - Segment Reporting."

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