Business Segment Information - Schedule of Sales and Property by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Sales and property by geographic region
Sales	$ 8,342.0	$ 8,264.0	$ 9,058.0
Property	797.0	777.0	684.0
North America
Sales and property by geographic region
Sales	5,270.0	5,053.0	5,224.0
Property	516.0	526.0	479.0
U.S. Plans
Sales and property by geographic region
Sales	4,847.0	4,612.0	4,773.0
Europe, Middle East, and Africa
Sales and property by geographic region
Sales	1,488.0	1,504.0	1,871.0
Property	149.0	142.0	116.0
Asia Pacific
Sales and property by geographic region
Sales	1,024.0	1,073.0	1,358.0
Property	116.0	91.0	66.0
Latin America
Sales and property by geographic region
Sales	560.0	634.0	605.0
Property	$ 16.0	$ 18.0	$ 23.0