Intangible Assets, net (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023
Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	$ 3,508.6	$ 3,421.3
Finite-Lived Intangible Assets, Accumulated Amortization	(1,335.4)	(1,242.0)
Finite-Lived Intangible Assets, Net	2,173.2	2,179.3
Intangible Assets, Net (Excluding Goodwill)
Carrying amount, total	4,550.1	4,454.4
Other intangible assets, net	3,214.7	3,212.4
Trademarks and brands
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Carrying amount	1,041.5	1,033.1
Customer Relationships
Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	2,622.5	2,535.5
Finite-Lived Intangible Assets, Accumulated Amortization	(1,011.0)	(940.7)
Finite-Lived Intangible Assets, Net	1,611.5	1,594.8
Trademarks and brands
Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	886.1	885.8
Finite-Lived Intangible Assets, Accumulated Amortization	(324.4)	(301.3)
Finite-Lived Intangible Assets, Net	$ 561.7	$ 584.5

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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