v3.5.0.1
Debt (Details) - Revolving Credit Facility [Member] - Unsecured Debt [Member] - USD ($)
6 Months Ended
Mar. 31, 2016
Sep. 25, 2015
Jun. 22, 2012
Debt Instrument [Line Items]      
Line of credit facility, maximum borrowing capacity     $ 750,000,000
Long-term debt, carrying value $ 280,000,000 $ 335,000,000  
Proceeds from Lines of Credit 130,000,000    
Repayments of Lines of Credit $ 185,000,000