v2.4.0.6
Share-based Compensation - Additional Information (Detail)
1 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
May 31, 2009
Employees
Dec. 31, 2012
USD ($)
Dec. 31, 2012
EUR (€)
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2012
Maximum [Member]
Dec. 31, 2012
Equity Rights [Member]
USD ($)
Dec. 31, 2011
Equity Rights [Member]
Dec. 31, 2012
Post-IPO Plan [Member]
USD ($)
Dec. 31, 2011
Post-IPO Plan [Member]
USD ($)
Dec. 31, 2010
Post-IPO Plan [Member]
USD ($)
Dec. 31, 2012
Post-IPO Plan [Member]
Stock Options [Member]
Dec. 31, 2012
Post-IPO Plan [Member]
Performance Share Units [Member]
USD ($)
Dec. 31, 2011
Post-IPO Plan [Member]
Performance Share Units [Member]
USD ($)
Dec. 31, 2010
Post-IPO Plan [Member]
Performance Share Units [Member]
USD ($)
Dec. 31, 2012
Post-IPO Plan [Member]
Restricted Share Units [Member]
USD ($)
Dec. 31, 2011
Post-IPO Plan [Member]
Restricted Share Units [Member]
USD ($)
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 (€)
Dec. 31, 2009
Pre-IPO Plans [Member]
EUR (€)
Dec. 31, 2011
Pre-IPO Plans [Member]
EUR (€)
Apr. 05, 2011
Pre-IPO Plans [Member]
Dec. 31, 2012
Pre-IPO Plans [Member]
Minimum [Member]
Dec. 31, 2012
Pre-IPO Plans [Member]
Maximum [Member]
Feb. 07, 2013
Pre-IPO Plans [Member]
Subsequent Event [Member]
EUR (€)
Dec. 31, 2012
Pre-IPO Plans [Member]
Stock Options [Member]
Dec. 31, 2012
Pre-IPO Plans [Member]
Equity Rights [Member]
Dec. 31, 2011
Pre-IPO Plans [Member]
Equity Rights [Member]
Dec. 31, 2012
Revised Stock Option [Member]
EUR (€)
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