Other Long-Term Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2021
Other Assets, Noncurrent Disclosure [Abstract]
Lease right of use asset (See Note 12 of Notes to Consolidated Financial Statements)	$ 237.2	$ 234.1	$ 216.9
Investments in affiliates (See Note 13 of Notes to Consolidated Financial Statements)	50.7	46.8	51.2
Deferred contract costs (See Note 3 of Notes to Consolidated Financial Statements)	415.8	73.2	50.6
Rabbi trust, less current portion	12.4	15.8	15.4
Customer finance receivables	3.5	3.4	2.4
Other	17.4	16.3	14.3
Other long-term assets, gross	737.0	389.6	350.8
Less allowance for doubtful receivables	(0.1)	(0.1)	(0.1)
Other long-term assets, net	$ 736.9	$ 389.5	$ 350.7