Revenue Recognition (Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenue Recognition [Abstract]
Receivables from contracts with customers, net	$ 673.0		$ 673.0		$ 762.0
Contract Asset (Current)	20.7		20.7		23.1
Contract Asset (Long-Term)	2.1		2.1		3.2
Contract Liability (Current)	43.7		43.7		42.5
Contract Liability (Long-Term)	72.5		72.5		$ 70.6
Amounts included in contract liability at the beginning of the period	9.0	$ 8.5	28.3	$ 26.9
Performance obligations satisfied in previous periods	$ 0.2	$ 4.1	(0.2)	1.5
Contract assets reclassified to receivables			$ 23.8	$ 28.7

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price.

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