Revenue Recognition (Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Revenue Recognition [Abstract]
Receivables from contracts with customers, net	$ 621.9		$ 621.9		$ 774.0
Contract Asset (Current)	23.2		23.2		20.4
Contract Asset (Long-Term)	2.4		2.4		2.8
Contract Liability (Current)	44.9		44.9		43.9
Contract Liability (Long-Term)	74.9		74.9		$ 72.9
Amounts included in contract liability at the beginning of the period	9.5	$ 9.0	30.0	$ 28.3
Performance obligations satisfied in previous periods	$ 2.5	$ 0.2	1.1	(0.2)
Contract assets reclassified to receivables			$ 20.8	$ 23.8