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Share-based Compensation - Additional Information (Detail)
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1 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||
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May 31, 2009
Employees
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Dec. 31, 2012
USD ($)
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Dec. 31, 2012
EUR (€)
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Dec. 31, 2012
Minimum [Member]
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Dec. 31, 2012
Maximum [Member]
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Dec. 31, 2012
Equity Rights [Member]
USD ($)
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Dec. 31, 2011
Equity Rights [Member]
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Dec. 31, 2012
Post-IPO Plan [Member]
USD ($)
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Dec. 31, 2011
Post-IPO Plan [Member]
USD ($)
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Dec. 31, 2010
Post-IPO Plan [Member]
USD ($)
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Dec. 31, 2012
Post-IPO Plan [Member]
Stock Options [Member]
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Dec. 31, 2012
Post-IPO Plan [Member]
Performance Share Units [Member]
USD ($)
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Dec. 31, 2011
Post-IPO Plan [Member]
Performance Share Units [Member]
USD ($)
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Dec. 31, 2010
Post-IPO Plan [Member]
Performance Share Units [Member]
USD ($)
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Dec. 31, 2012
Post-IPO Plan [Member]
Restricted Share Units [Member]
USD ($)
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Dec. 31, 2011
Post-IPO Plan [Member]
Restricted Share Units [Member]
USD ($)
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Dec. 31, 2010
Post-IPO Plan [Member]
Restricted Share Units [Member]
USD ($)
|
Dec. 31, 2012
Pre-IPO Plans [Member]
USD ($)
|
Dec. 31, 2012
Pre-IPO Plans [Member]
EUR (€)
|
Dec. 31, 2011
Pre-IPO Plans [Member]
USD ($)
|
Dec. 31, 2010
Pre-IPO Plans [Member]
USD ($)
|
Dec. 31, 2010
Pre-IPO Plans [Member]
EUR (€)
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Dec. 31, 2009
Pre-IPO Plans [Member]
EUR (€)
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Dec. 31, 2011
Pre-IPO Plans [Member]
EUR (€)
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Apr. 05, 2011
Pre-IPO Plans [Member]
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Dec. 31, 2012
Pre-IPO Plans [Member]
Minimum [Member]
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Dec. 31, 2012
Pre-IPO Plans [Member]
Maximum [Member]
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Feb. 07, 2013
Pre-IPO Plans [Member]
Subsequent Event [Member]
EUR (€)
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Dec. 31, 2012
Pre-IPO Plans [Member]
Stock Options [Member]
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Dec. 31, 2012
Pre-IPO Plans [Member]
Equity Rights [Member]
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Dec. 31, 2011
Pre-IPO Plans [Member]
Equity Rights [Member]
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Dec. 31, 2012
Revised Stock Option [Member]
EUR (€)
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||||||
| Expected life | 6 years 3 months | 3 years | 4 years 3 months | |||||||||||||||||||||||||||||
| Risk-free interest rate, minimum | 0.80% | 1.20% | 4.10% | 4.10% | ||||||||||||||||||||||||||||
| Risk-free interest rate, maximum | 1.30% | 2.78% | 1.60% | 1.60% | ||||||||||||||||||||||||||||
| Risk-free interest rate | 1.67% | |||||||||||||||||||||||||||||||
| Expected dividend payments | $ 0 | |||||||||||||||||||||||||||||||
| Volatility rate | 45.00% | |||||||||||||||||||||||||||||||
| Requisite service period | 4 years | 3 years | 3 years | 4 years | ||||||||||||||||||||||||||||
| Charges for plan | 44,000,000 | 17,000,000 | 2,000,000 | 8,000,000 | 14,000,000 | 10,000,000 | ||||||||||||||||||||||||||
| Weighted average grant date fair value of stock options | $ 10.44 | $ 7.81 | $ 6.04 | € 1.20 | € 1.80 | |||||||||||||||||||||||||||
| Intrinsic value of exercised options | 7,000,000 | 300,000 | 8,000,000 | 19,000,000 | ||||||||||||||||||||||||||||
| Amount received on stock options exercised | 9,000,000 | 1,000,000 | 6,000,000 | 9,000,000 | ||||||||||||||||||||||||||||
| Number of vested stock options | 1,819,243 | 853,732 | 2,372,254 | 2,372,254 | 2,875,053 | 5,173,338 | ||||||||||||||||||||||||||
| Unrecognized compensation cost | 1,000,000 | 64,000,000 | ||||||||||||||||||||||||||||||
| Weighted-average period to recognize compensation cost | 1 year | 1 year | 3 years 3 months 18 days | 3 years 6 months | 1 year 10 months 24 days | 2 years 6 months | 2 years 4 months 24 days | 2 years 6 months | ||||||||||||||||||||||||
| Weighted average grant date fair value of units granted | $ 23.35 | $ 17.38 | $ 13.27 | $ 23.31 | $ 17.52 | $ 13.27 | ||||||||||||||||||||||||||
| Number of vested shares | 30,311 | 249,962 | 849,289 | 400,835 | 62,765 | 444,395 | ||||||||||||||||||||||||||
| Fair value of vested shares | 1,000,000 | 4,000,000 | 21,000,000 | 7,000,000 | 0 | |||||||||||||||||||||||||||
| Unrecognized compensation cost | 29,000,000 | 19,000,000 | 54,000,000 | 31,000,000 | ||||||||||||||||||||||||||||
| Percentage of common stock hold by Private Equity Consortium | 30.00% | 30.00% | ||||||||||||||||||||||||||||||
| Exercise price of stock options, lower range | € 20.00 | € 2.00 | € 2.00 | |||||||||||||||||||||||||||||
| Exercise price of stock options, upper range | € 50.00 | € 50.00 | € 40.00 | |||||||||||||||||||||||||||||
| Expected asset volatility rate, minimum | 27.00% | 27.00% | ||||||||||||||||||||||||||||||
| Expected asset volatility rate, maximum | 38.00% | 38.00% | ||||||||||||||||||||||||||||||
| Dividend pay-out ratio | ||||||||||||||||||||||||||||||||
| Lack of marketability discounts | 26.00% | 35.00% | ||||||||||||||||||||||||||||||
| Terminal growth rates | 3.00% | 3.00% | ||||||||||||||||||||||||||||||
| Weighted average cost of capital | 12.40% | 12.40% | ||||||||||||||||||||||||||||||
| Number of employees eligible for and affected by the stock option exchange program | 120 | |||||||||||||||||||||||||||||||
| Exit event exercise period | 5 years | 5 years | ||||||||||||||||||||||||||||||
| Additional cost due to accelerated exercise | 4,000,000 | 1,000,000 | ||||||||||||||||||||||||||||||
| Incremental compensation costs | $ 8,000,000 | $ 6,000,000 | $ 6,000,000 | |||||||||||||||||||||||||||||
| Number of vested stock options | 13,603,205 | 13,603,205 | 12,194,166 | |||||||||||||||||||||||||||||
| Weighted average exercise price of vested options | € 22.96 | € 25.78 | € 14.65 | |||||||||||||||||||||||||||||
| Options under Pre-IPO Plans became exercisable, percentage | 22.00% | 38.00% | ||||||||||||||||||||||||||||||
| Options expected to expire as a result of exceeding maximum contractual term | 0 | 0 | ||||||||||||||||||||||||||||||
| Equity rights issued | 0 | 0 | ||||||||||||||||||||||||||||||
| Shares delivered to current employees | 381,630 | 381,630 | ||||||||||||||||||||||||||||||