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Composition of Certain Financial Statement Captions - Schedule of Compensation and Other Employee Benefits (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Balance Sheet Related Disclosures [Abstract]    
Accrued salaries and wages $ 13 $ 26
Accrued bonus 5 4
Accrued employee benefits 21 20
Total $ 39 $ 50