Debt Term Loan (Details) (Term Loan Facility Two [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Nov. 16, 2012	Dec. 31, 2011	Oct. 28, 2011
Line of Credit Facility [Line Items]
Long-term Debt	$ (912.5)		$ (1,000.0)	$ (1,000.0)
Deferred Finance Costs, Net		2.2
Debt Instrument, Quarterly Amortization Percentage	1.25%
Prepayment of Principal	$ 50.0
Term loan interest rate over and above LIBRO rate	2.71%
Libor Rate Plus 2.5% [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Libor Rate plus .5% [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Maximum [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.75%
Libor Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Libor Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	3.50%
Libor Rate Plus 1% [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%