Goodwill and Other Intangibles (Details) - Goodwill (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Goodwill by geographical region [Roll Forward]
Goodwill, Beginning Balance	$ 1,469.7	$ 1,231.4
Acquisitions (See Note 21)	0	232.8
Purchase price adjustments	(0.2)
Foreign currency	1.6	5.5
Ending balance	1,471.1	1,469.7
North America [Member]
Goodwill by geographical region [Roll Forward]
Goodwill, Beginning Balance	1,275.6	1,042.8
Acquisitions (See Note 21)		232.8
Purchase price adjustments	(0.2)
Foreign currency	0	0
Ending balance	1,275.4	1,275.6
International [Member]
Goodwill by geographical region [Roll Forward]
Goodwill, Beginning Balance	194.1	188.6
Acquisitions (See Note 21)	0	0
Purchase price adjustments	0
Foreign currency	1.6	5.5
Ending balance	$ 195.7	$ 194.1