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Transactions with Total (Details) (USD $)
 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2013
Jun. 28, 2011
Jun. 21, 2011
Jun. 14, 2011
Jun. 13, 2011
Apr. 28, 2011
Feb. 28, 2012
Total [Member]
Mar. 31, 2013
Total [Member]
Apr. 01, 2012
Total [Member]
Dec. 30, 2012
Total [Member]
Jan. 31, 2012
Total [Member]
Private Placement [Member]
Jan. 31, 2012
Tenesol [Member]
Total [Member]
Jun. 21, 2011
Total [Member]
Jun. 13, 2011
Total [Member]
Apr. 28, 2011
Total [Member]
Jun. 21, 2011
Total [Member]
Common Class A [Member]
Jun. 13, 2011
Total [Member]
Common Class A [Member]
Apr. 28, 2011
Total [Member]
Common Class A [Member]
Jun. 21, 2011
Total [Member]
Common Class B [Member]
Jun. 13, 2011
Total [Member]
Common Class B [Member]
Apr. 28, 2011
Total [Member]
Common Class B [Member]
Mar. 31, 2013
Total [Member]
Apr. 01, 2012
Total [Member]
Business Acquisition, Cost of Acquired Entity, Purchase Price                       $ 165,400,000                      
Business Acquisition, Percentage of Voting Interests Acquired                       100.00%                      
Sale of Stock, Number of Shares Issued in Transaction                     18,600,000                        
Sale of Stock, Price Per Share                     $ 8.80                        
Sale of Stock, Percentage of Ownership after Transaction                     66.00%                        
Tender Offer Agreement, Date           4/28/2011                                  
Tender Offer Agreement, Percentage of Outstanding Share to be Acquired Under Agreement                             60.00%     60.00%          
Tender Offer Agreement, Purchase Price per Share                             $ 23.25     $ 23.25     $ 23.25    
Tender Offer Agreement, Expiration Date       6/14/2011                                      
Tender Offer Agreement, Payment Date     6/21/2011                                        
Tender Offer Agreement, Shares Purchased                               34,756,682     25,220,000        
Tender Offer Agreement, Percentage of Outstanding Shares Acquired                           60.00%     60.00%     60.00%      
Tender Offer Agreement, Outstanding Shares Calculation Date         6/13/2011                                    
Tender Offer Agreement, Date of European Commission Clearance   6/28/2011                                          
Tender Offer Agreement, Total Purchase Price                         1,400,000,000                    
Credit Support Agreement, Guaranty Fees Incurred                                           1,800,000 1,800,000
Affiliation Agreement, Voting Power Restricted by Affiliation Agreement 100.00%                                            
Affiliation Agreement, Percent of Shares Able to Transfer Restricted By Affiliation Agreement 40.00%                                            
Registration Rights Agreement, Shares Held Minimum Percentage Threshold 5.00%                                            
Registration Rights Agreement, Number Of Days Shares Can Be Resold Termination 90 days                                            
By Laws Amendment, Minimum Percentage of Voting Interest Collectively Owned 30.00%                                            
Liquidity Support Agreement, Maximum Capacity               600,000,000                              
Liquidity Support Agreement, Unrestricted Cash, Cash Equivalents and Unused Borrowing Capacity, Threshold for Liquidity Support             100,000,000 100,000,000                              
Liquidity Support Agreement, Utilized Capacity                   275,000,000                          
Liquidity Support Facility, Warrant, Numerator For Warrant Shares Calculation             75,000,000                                
Liquidity Support Facility, Warrant, Minimum Amount of Outstanding Convertible Debt Required to be Outstanding             25,000,000                                
Liquidity Support Facility, Warrant, Maximum Ownership Percentage Allowed             74.99%                                
Liquidity Support Facility, Warrant, Trading Period For Warrant Shares Calculation             30 days                                
Liquidity Support Facility, Warrant Term             7 years                                
Liquidity Support Facility, Warrant Issued, Number of Common Stock Shares             9,531,677                                
Liquidity Support Facility, Warrant Issued, Exercise Price Per Share             $ 7.8685                                
Liquidity Support Facility, Time Period After Calendar Quarter For Required Cash Payments               30 days                              
Liquidity Support Facility, Unused Capacity, Commitment Fee Percentage               0.25%                              
Liquidity Support Facility, Guarantee Fee, Percent of Average Guaranteed Debt               2.75%                              
Liquidity Support Facility, Basis Spread LIBOR Rate               5.00%                              
Liquidity Support Facility, Available Capacity               325,000,000                              
Liquidity Support Facility, Commitment Fees               1,700,000 600,000                            
Master Agreement, Maximum R&D Funding               $ 2,500,000