Borrowings - Outstanding Borrowings (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended	3 Months Ended
	Jun. 30, 2012	Sep. 30, 2013 Fiscal 2012 Term Loan Facility [Member]	Sep. 30, 2013 Fiscal 2012 Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Repayment of revolving credit facility	$ 90.0	$ 400.0	$ 400.0