Supplemental Information (Other Receivables and Current Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Disclosure Text Block Supplement [Abstract]
Derivative instruments	$ 73.5	$ 114.4
Value added tax receivable	209.6	94.2
Contract fulfillment costs	89.0	84.1
Contract assets	124.7	69.0
Current lease receivables	78.0	77.8
Current financing receivables	50.0	0.0
Other	97.3	76.3
Other receivables and current assets	$ 722.1	$ 515.8