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Redeemable Noncontrolling Interest (Details) (USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended 9 Months Ended
May 31, 2012
Sep. 30, 2012
Sep. 30, 2011
Aug. 31, 2012
Redeemable Noncontrolling Interest        
Adjustment to retained earnings within shareholders' equity   $ 106    
Adjustment to increase the liability 25      
Issuance of shares in exchange for noncontrolling interest 8,695,351      
Adjustment to share capital 134      
Adjustment to additional paid in capital 233      
Extinguishment of TPDI Notes payable 148      
Accrued and unpaid interest 16      
Percentage of TPDI's working capital 50.00%      
Final Cash Settlement for Noncontrolling Interest       72
Percentage interest in joint venture (TPDI) that is held by an unaffiliated party (Quantum)       50.00%
Redeemable noncontrolling interest        
Balance, beginning of period   116 41  
Net income attributable to noncontrolling interest   13 36  
Other comprehensive loss attributable to noncontrolling interest     (6)  
Fair value adjustment of redeemable noncontrolling interest   106    
Reclassification to accumulated other comprehensive loss   17    
Reclassification to other current liabilities   (252)    
Balance, end of period     $ 71