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Income Taxes (Details) (USD $)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Income Taxes [Abstract]     
Income tax (benefit) expense$ (73,202,000)$ (28,721,000)$ (77,016,000)$ (112,770,000) 
Income taxes receivable79,378,000 79,378,000 81,307,000
Deferred tax assets, gross2,500,000,000 2,500,000,000 2,600,000,000
Deferred tax assets, valuation allowance2,500,000,000 2,500,000,000 2,600,000,000
Section 382 limitations on use of pre-ownership Centex losses per year  67,400,000  
Period in which to recognize Section 382 limitations on use of pre-ownership Centex losses, months  60  
Gross unrecognized tax benefits181,100,000 181,100,000 258,000,000
Accrued interest and penalties42,500,000 42,500,000 48,400,000
Possible decrease in unrecognized tax benefits$ 35,200,000 $ 35,200,000