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Revenue from Contracts with Customers Future Amortization of Liabilities and Deferred Costs (Details) $ in Millions	Jun. 30, 2021 USD ($)
Capitalized Contract Cost [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 45.4
Capitalized Contract Cost, Net	22.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Capitalized Contract Cost [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 33.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 months
Capitalized Contract Cost, Amortization Expense, Remainder Of Fiscal Year	$ 14.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Capitalized Contract Cost [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 11.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Capitalized Contract Cost, Amortization Expense, Year Two	$ 8.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Capitalized Contract Cost [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 0.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Capitalized Contract Cost, Amortization Expense, Year Three	$ 0.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Capitalized Contract Cost [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 0.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Capitalized Contract Cost, Amortization Expense, Year Four and Thereafter	$ 0.0

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Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054

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- Definition

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

+ References

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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Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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

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