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Income Taxes (Details) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Minimum [Member]
Jun. 30, 2011
Maximum [Member]
Jun. 30, 2011
Discrete Tax Expense Items [Member]
Jun. 30, 2011
Discrete Tax Expense Items [Member]
Jun. 30, 2011
Relating to Cumulative Federal NOL's [Member]
Jun. 30, 2011
Relating to Cumulative Federal NOL's [Member]
Dec. 31, 2010
Relating to Cumulative Federal NOL's [Member]
Jun. 30, 2011
Relating to a Net Increase in Liabilities for Uncertain Tax Positions and Valuation Allowances on Foreign Losses [Member]
Jun. 30, 2011
Relating to a Net Increase in Liabilities for Uncertain Tax Positions and Valuation Allowances on Foreign Losses [Member]
Jun. 30, 2011
Relating to Correction of Prior Period Foreign Tax Expense Calculations [Member]
Jun. 30, 2011
Pre-emergence [Member]
Provision for income taxes $ 26,900,000 $ 88,200,000 $ 92,600,000 $ 131,600,000     $ 2,200,000 $ 18,800,000       $ 800,000 $ 9,800,000 $ 9,000,000  
Decrease due to settlements of audits         0 10,000,000                  
Net operating loss related to the current year                     4,000,000,000        
Domestic pretax income (loss)                 (288,000,000) (701,000,000)          
Annual limitation on use of NOLs                             230,000,000
Net operating loss (NOL) carry forwards                             $ 1,900,000,000