Allowance for Credit Losses (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Receivables [Abstract]
Provision for (release of) credit losses	$ 7.9	$ (15.0)	$ 0.1	$ (0.5)
Net charge-offs (recoveries)	(0.1)	0.0	$ 10.3	2.9
Time period used for projecting future conditions to estimate credit losses			2 years
Other financial assets, allowance for credit loss	$ 0.9	$ 1.0	$ 0.9	$ 1.0	$ 1.0	$ 0.9	$ 1.0	$ 0.8