Debt (Details) (6.125% Senior Notes due December 2014 [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 31, 2014
Dec. 01, 2014
6.125% Senior Notes due December 2014 [Member]
   
Debt Instrument [Line Items]    
Senior Notes, Interest rate   6.125%
Repayment of debt obligations $ 500