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Deferred Revenue and Performance Obligation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Deferred Revenue and Performance Obligation [Abstract]
Deferred Revenue, Revenue Recognized	$ 43.3	$ 45.3	$ 86.0	$ 107.2
Revenue, Remaining Performance Obligation, Amount	373.0		373.0
Revenue Remaining Performance Obligation, to be recognized within 12 months	$ 180.5		$ 180.5

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- Definition

Deferred Revenue and Performance Obligation [Abstract]

+ References

No definition available.

+ Details

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- Definition

Revenue Remaining Performance Obligation, to be recognized within 12 months

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No definition available.

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- Definition

Amount of revenue recognized that was previously reported as deferred or unearned revenue.

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No definition available.

+ Details

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- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

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