Revenue Recognition (Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenue Recognition [Abstract]
Receivables from contracts with customers, net	$ 593.4		$ 593.4		$ 634.5
Contract Asset (Current)	17.9		17.9		27.7
Contract Asset (Long-Term)	3.2		3.2		8.6
Contract Liability (Current)	41.4		41.4		41.8
Contract Liability (Long-Term)	67.5		67.5		$ 66.6
Amounts included in contract liability at the beginning of the period	9.0	$ 8.8	18.4	$ 17.8
Performance obligations satisfied in previous periods	$ (0.3)	$ 0.9	(2.6)	4.7
Contract assets reclassified to receivables			$ 28.7	$ 30.5