Supplemental Information (Other Noncurrent Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Disclosure Text Block Supplement [Abstract]
Operating lease right-of-use assets	$ 694.7	$ 566.2
Pension benefits	133.9	219.2
Long-term deposits on plant and equipment	200.0	200.0
Deferred tax assets	135.7	100.2
Prepaid tax	17.0	75.0
Investments other than equity method	66.7	66.9
Derivative instruments	74.7	23.6
Other	319.1	255.4
Other noncurrent assets	$ 1,641.8	$ 1,506.5