Commitments and Contingencies - Contigent Consideration for Acquisitions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended						3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2013 Tradewire Acquisition [Member] [Member]	Dec. 31, 2013 Hencorp Acquisition [Member]	Dec. 31, 2013 Tradewire Acquisition [Member] [Member]	Dec. 31, 2013 Hencorp Acquisition [Member]	Dec. 31, 2013 Coffee Network Acquisition [Member]	Nov. 30, 2011 Coffee Network Acquisition [Member]	Dec. 31, 2013 Contingent Consideration [Member]	Dec. 31, 2012 Contingent Consideration [Member]
Business Acquisition, Contingent Consideration [Line Items]
Accounts payable and other accrued liabilities - contingent consideration, fair value	$ 9.1		$ 9.6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)										0.2	0.3
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0.2	3.4		0.2	0.1
Business Combination, Consideration, Including Contingent Consideration						6.6
Business Acquisition, Cost of Acquired Entity, Purchase Price							7.5	0.1
Business Acquisition, Contingent Consideration, at Fair Value					$ 2.5				$ 0.1