v2.4.0.6
Supplemental Consolidating Guarantor and Non-Guarantor Financial Information - Consolidating Balance Sheet (Parenthetical) (Detail) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]    
Common stock, shares outstanding 198.3  
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 5,000 5,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 5,000 5,000
Common stock, shares issued 4,801.7 4,801.7
Common stock, shares outstanding 4,801.7 4,801.7
Successor [Member]
    
Condensed Financial Statements, Captions [Line Items]    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 5,000 5,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 5,000 5,000
Common stock, shares issued 4,801.6 4,801.6
Common stock, shares outstanding 4,801.6 4,801.6
Put Options Written [Member]
    
Condensed Financial Statements, Captions [Line Items]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 5,000 5,000
Common stock, shares issued 198.3 198.3
Common stock, shares outstanding 198.3 198.3
Put Options Written [Member] | Successor [Member]
    
Condensed Financial Statements, Captions [Line Items]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 5,000 5,000
Common stock, shares issued 198.4 198.4
Common stock, shares outstanding 198.4 198.4