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Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Detail) (USD $)
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3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Operating Margin | |||||||||||
| Total Contribution Margin | $ 1,921,100,000 | $ 1,636,900,000 | $ 1,275,200,000 | ||||||||
| Selling, general and administrative expense | 1,259,667,000 | 1,074,623,000 | 887,655,000 | ||||||||
| Interest expense | 16,736,000 | 9,864,000 | 9,664,000 | ||||||||
| Interest income | 6,195,000 | 7,373,000 | 2,247,000 | ||||||||
| Income before income taxes | 650,906,000 | 559,779,000 | 380,095,000 | ||||||||
| Income taxes | 173,716,000 | 147,201,000 | 80,880,000 | ||||||||
| Net income | 117,800,000 | 117,800,000 | 133,400,000 | 108,200,000 | 105,400,000 | 108,000,000 | 111,200,000 | 88,000,000 | 477,190,000 | 412,578,000 | 299,215,000 |
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United States [Member]
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| Operating Margin | |||||||||||
| Total Contribution Margin | 359,500,000 | 286,300,000 | 257,000,000 | ||||||||
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Mexico [Member]
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| Operating Margin | |||||||||||
| Total Contribution Margin | 205,600,000 | 191,100,000 | 131,700,000 | ||||||||
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South Korea [Member]
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| Operating Margin | |||||||||||
| Total Contribution Margin | 199,400,000 | 163,100,000 | 103,000,000 | ||||||||
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Others [Member]
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| Operating Margin | |||||||||||
| Total Contribution Margin | 906,500,000 | 810,000,000 | 618,500,000 | ||||||||
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Primary Reporting Segment [Member]
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| Operating Margin | |||||||||||
| Total Contribution Margin | 1,671,000,000 | 1,450,500,000 | 1,110,200,000 | ||||||||
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China [Member]
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| Operating Margin | |||||||||||
| Total Contribution Margin | $ 250,100,000 | $ 186,400,000 | $ 165,000,000 | ||||||||