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Derivative Financial Instruments (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Fair values of outstanding derivative instruments
Derivative assets	$ 4.0		$ 4.8
Derivative liabilities	8.2		8.5
Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Effect of derivative instruments on income and other comprehensive income
Increase in Losses Recognized in Accumulated Other Comprehensive Loss on Derivatives Before Tax Effect (Effective Portion)	4.8
Designated as Hedging Instrument [Member] \| Foreign Exchange Option [Member] \| Cash Flow Hedging [Member]
Effect of derivative instruments on income and other comprehensive income
Options outstanding	0
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Effect of derivative instruments on income and other comprehensive income
Increase in Losses Recognized in Accumulated Other Comprehensive Loss on Derivatives Before Tax Effect (Effective Portion)	(2.5)	(0.3)
Losses Recognized in Income on Derivatives (Amount Excluded from Effectiveness Testing and Ineffective Portion)	0
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Cash Flow Hedging [Member] \| Interest Expense [Member]
Effect of derivative instruments on income and other comprehensive income
Losses Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)	(0.8)	(0.8)
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Accrued Expenses and Other Current Liabilities [Member]
Fair values of outstanding derivative instruments
Derivative liabilities	4.9		4.8
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Other Noncurrent Asset [Member]
Fair values of outstanding derivative instruments
Derivative assets	0.1		1.7
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member] \| General and Administrative Expense [Member]
Effect of derivative instruments on income and other comprehensive income
Non designated derivatives, Gains/(Losses) Recognized in Income on Derivatives (Amount Excluded from Effectiveness Testing and Ineffective Portion)	(0.5)	(2.2)
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member] \| Prepaid Expenses and Other Current Assets [Member]
Fair values of outstanding derivative instruments
Derivative assets	3.9		3.1
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member] \| Accrued Expenses and Other Current Liabilities [Member]
Fair values of outstanding derivative instruments
Derivative liabilities	$ 3.3		$ 3.7