Equity - Capped Calls (Details) (Call Option [Member], Purchased options [Member], Convertible Debt [Member], USD $)	6 Months Ended
	Mar. 05, 2015
Minimum [Member]
Option Indexed to Issuer's Equity [Line Items]
Option indexed to Issuer's Equity, strike price (in dollars per share)	$ 9.50
Option Indexed to Issuer's Equity, capped ceiling	$ 12.67
Option Indexed To Issuers Equity Settlement Proceeds	$ 0
Maximum [Member]
Option Indexed to Issuer's Equity [Line Items]
Option indexed to Issuer's Equity, strike price (in dollars per share)	$ 10.93
Option Indexed to Issuer's Equity, capped ceiling	$ 16.04
Option Indexed To Issuers Equity Settlement Proceeds	$ 864,000,000