Business and Asset Actions (Global Cost Reduction Plan) (Details) $ in Millions	3 Months Ended			9 Months Ended		37 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Business and asset actions	$ 2,907.4	$ 24.1		$ 2,929.4	$ 2,952.0
Global Cost Reduction Plan
Restructuring Cost and Reserve [Line Items]
Charge for severance and other postemployment benefits						$ 207.7
Number of employees to whom involuntary termination benefits are payable | employee						3,600
Business and asset actions	0.0	$ 0.0	$ 66.1	0.0	$ 66.1
Restructuring Reserve [Roll Forward]
Amount accrued at beginning of period				101.6
Cash payments				(47.7)
Currency translation adjustment				(0.6)
Amount accrued at end of period	$ 53.3			$ 53.3		$ 53.3