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Shareholders' Equity - Additional Information (Detail)
In Millions, except Share data, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2008
USD ($)
Dec. 31, 2002
Dec. 31, 2012
EUR (€)
Dec. 31, 2011
EUR (€)
Jan. 22, 2008
Dec. 31, 2002
Advisor To Supervisory Board [Member]
Dec. 31, 2001
Advisor To Supervisory Board [Member]
Dec. 31, 2000
Advisor To Supervisory Board [Member]
Dec. 31, 1999
Advisor To Supervisory Board [Member]
Dec. 31, 2002
Supervisory Board Option Plan [Member]
Dec. 31, 2001
Supervisory Board Option Plan [Member]
Dec. 31, 2000
Supervisory Board Option Plan [Member]
Dec. 31, 1999
Supervisory Board Option Plan [Member]
Dec. 31, 2001
Employee Stock Option Plan, 2001 [Member]
Dec. 31, 2012
Supervisory Board Two Thousand Twelve [Member]
EUR (€)
Dec. 31, 2012
Employee Plan 2009 [Member]
Dec. 31, 2009
Employee Plan 2009 [Member]
USD ($)
May 20, 2012
Employee Plan 2009 [Member]
Subsequent Event [Member]
May 20, 2011
Employee Plan 2009 [Member]
Subsequent Event [Member]
May 20, 2010
Employee Plan 2009 [Member]
Subsequent Event [Member]
May 20, 2012
Employee Plan 2009 [Member]
Subsequent Event [Member]
FRANCE
May 20, 2011
Employee Plan 2009 [Member]
Subsequent Event [Member]
FRANCE
Dec. 31, 2012
Employee Plan 2010 [Member]
Dec. 31, 2010
Employee Plan 2010 [Member]
USD ($)
Dec. 31, 2012
Employee Plan 2011 [Member]
Dec. 31, 2011
Employee Plan 2011 [Member]
USD ($)
Dec. 31, 2012
Employee Plan 2012 [Member]
USD ($)
Dec. 31, 2012
Retained Earnings [Member]
USD ($)
Dec. 31, 2011
Retained Earnings [Member]
USD ($)
Dec. 31, 2010
Retained Earnings [Member]
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                                  
Total Authorized share capital           € 1,810                                                      
Common stock, shares authorized 1,200,000,000 1,200,000,000                                                              
Preference stock, shares authorized 540,000,000 540,000,000           540,000,000                                                  
Common stock, nominal value           € 1.04 € 1.04                                                    
Common stock, shares issued 910,559,805 910,559,805                                                              
Common stock Shares outstanding 887,953,202 884,995,094                                                              
Shares issued as a percentage of Par value of the preference shares to be issued               25.00%                                                  
Preference shares outstanding Maximum Period       2 years                                                          
Repurchase of common shares Authorized to repurchase       30                                                          
Acquisition of shares       29,520,220                                                          
Company owned treasury shares 22,606,603                                                                
Transfer of treasury shares to employees under the Company's share based remuneration programs 20,313,617                                                                
Transfer of treasury shares to employees under the Company's share based remuneration during the year 2,958,108                                                                
Share-based Compensation Arrangement by Share-based Payment Award,Options,Grants in Period                 6,000 4,500 4,500 9,000 12,000 9,000 9,000 18,000                                  
Vesting period of option         30 days                     1 year                                  
Option expiration in years after grant date         10 years                   8 years   10 years                                
Maximum Period authorized to be Granted 6,700,765                               60,000,000 180,000                          6,520,765      
Weighted Average Remaining contractual life options 9 months 18 days 1 year 2 months 12 days 1 year 10 months 24 days                                                            
Awards are granted at the nominal value of the share                                   € 1.04                              
Sub plan for employees of Company's European subsidiaries for statutory payroll tax purposes nonvested shares vested over requisite service period                                         36.00% 32.00% 32.00% 36.00% 64.00%                
Vesting schedule for Supervisory Board     One third of the total number of awards granted                                                            
Weighted average grant-date fair value of nonvested shares granted to employees under Employee Plan                                       $ 7.54             $ 8.74   $ 9.08 $ 4.87      
Number of shares to vest                                       Two thirds of the awards granted will fully vest             Two thirds of the awards granted will fully vest   None of the three performance conditions were met Two thirds of the awards granted will fully vest      
Compensation cost, excluding payroll tax and social contribution, capitalized as part of inventory 1 2 2                                                            
Total unrecognized compensation cost related to the grant of nonvested shares 16                                                                
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition 10 months                                                                
Deferred income tax expense relating to unvested share based compensation expense 2 7 3                                                            
Gain (loss) reclassified from OCI into earnings 55                                                                
Dividends, per share $ 0.40 $ 0.40 $ 0.28                                                            
Dividends 355 354 247                                                       355 354 247
Dividend paid 266 266                                                              
Cash dividend paid per common share per quarter $ 0.10 $ 0.10                                                              
Dividends payable to stockholders at the end of the period $ 89 $ 88