Deficit Level 4 (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Class of Stock [Line Items]        
shares outstanding 82,556,847 82,556,847    
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01    
Forgiveness of Note Receivable from Parent $ 0 $ 24 $ 0  
Non-cash distribution declared to parent 0 208 0  
Aggregate balance of MSC Holdings LLC PIK Facility   247    
Apollo Affiliates and Other Related Parties [Member]        
Class of Stock [Line Items]        
Partial proceeds from the Preferred Equity Issuance received     189 189
Remaining proceeds held in reserve from the Preferred Equity Issuance     16 16
Proceeds from Issuance or Sale of Equity     204 204
Notes Receivable From Parent [Member]        
Class of Stock [Line Items]        
Forgiveness of Note Receivable from Parent   $ 24