Business Segment Information - Schedule of Sales and Property by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Sales and property by geographic region
Sales	$ 9,058.0	$ 7,760.4	$ 6,997.4
Property	684.2	586.5	581.9
North America
Sales and property by geographic region
Sales	5,224.0	4,722.0	4,132.8
Property	478.8	430.7	416.1
U.S. Plans
Sales and property by geographic region
Sales	4,773.2	4,315.5	3,740.2
Europe, Middle East and Africa
Sales and property by geographic region
Sales	1,870.6	1,437.6	1,405.7
Property	116.4	78.9	91.1
Asia Pacific
Sales and property by geographic region
Sales	1,358.0	1,088.0	1,012.2
Property	66.2	58.6	54.8
Latin America
Sales and property by geographic region
Sales	605.4	512.8	446.7
Property	$ 22.8	$ 18.3	$ 19.9