Intangible Assets, Goodwill and Other (Changes in Carrying Amount of Goodwill by Reportable Operating Segment) (Details) $ in Millions	9 Months Ended
	Jun. 30, 2024 USD ($)
Goodwill [Line Items]
Goodwill, beginning balance	$ 3,218.3
Other	(34.7)	[1]
Goodwill, ending balance	3,183.6
North America [Member]
Goodwill [Line Items]
Goodwill, beginning balance	491.5
Other	(0.4)	[1]
Goodwill, ending balance	491.1
International [Member]
Goodwill [Line Items]
Goodwill, beginning balance	2,691.1
Other	(34.3)	[1]
Goodwill, ending balance	2,656.8
Channel Development [Member]
Goodwill [Line Items]
Goodwill, beginning balance	34.7
Other	0.0	[1]
Goodwill, ending balance	34.7
Corporate and Other [Member]
Goodwill [Line Items]
Goodwill, beginning balance	1.0
Other	0.0	[1]
Goodwill, ending balance	$ 1.0

[1] “Other” consists of changes in the goodwill balance resulting from foreign currency translation.