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Revenue from Contracts with Customers Components of Contract Assets and Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset, Net, Current	$ 1.4	$ 3.5
Contract with Customer, Liability, Current	57.6	30.0
Contract with Customer, Liability, Noncurrent	14.3	9.7
Change in Contract With Customer, Asset [Roll Forward]
Contract with Customer, Asset, after Allowance for Credit Loss	3.5
Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent	0.4	$ 0.0
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	3.1
Contract with Customer, Asset, Reclassified to Receivable	(4.8)
Contract with Customer, Asset, after Allowance for Credit Loss	1.8
Change in Contract With Customer, Liability [Roll Forward]
Contract with Customer, Liability	39.7
Contract with Customer, Liability, Increase from Cash Receipts	81.5
Contract with Customer, Liability, Revenue Recognized, Included In Beginning Balance	(24.6)
Contract with Customer, Liability, Revenue Recognized, Added During Period	(24.7)
Contract with Customer, Liability	$ 71.9

X

- Definition

Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

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-Publisher FASB
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- Definition

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.

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X

- Definition

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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- Definition

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 noncurrent.

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X

- Definition

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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- Definition

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

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- Definition

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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- Definition

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

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- Definition

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No definition available.

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No definition available.

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