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Financial Information for Subsidiary Guarantors and Non-guarantor Subsidiaries (Narrative) (Details) (Unsecured Debt [Member], USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Senior Notes, 6.125, Due in 2018 [Member]
 
Condensed Financial Statements, Captions [Line Items]  
Stated interest rate percentage (percent) 6.125%
Senior Notes, 5.50, Due in 2019 [Member]
 
Condensed Financial Statements, Captions [Line Items]  
Stated interest rate percentage (percent) 5.50%
Principal amount $ 750