Business Segment Information - Schedule of Sales and Property by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Sales and property by geographic region
Sales	$ 8,264.2	$ 9,058.0	$ 7,760.4
Property	776.7	684.2	586.5
North America
Sales and property by geographic region
Sales	5,052.8	5,224.0	4,722.0
Property	526.4	478.8	430.7
U.S. Plans
Sales and property by geographic region
Sales	4,611.9	4,773.2	4,315.5
Europe, Middle East and Africa
Sales and property by geographic region
Sales	1,504.5	1,870.6	1,437.6
Property	141.6	116.4	78.9
Asia Pacific
Sales and property by geographic region
Sales	1,072.8	1,358.0	1,088.0
Property	91.3	66.2	58.6
Latin America
Sales and property by geographic region
Sales	634.1	605.4	512.8
Property	$ 17.4	$ 22.8	$ 18.3