Summary of Significant Accounting Policies - Deferred Revenue (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Capitalized Contract Cost [Line Items]
Cash received in advance and not recognized as revenue	$ 124.0
Increase from netting of contract assets and liabilities on contract by contract basis	0.9
Increase in revenue recognized from current year invoices	85.5
Revenue recognized that was included in the contract liability balance	31.0
Revenue from remaining performance obligations	$ 1,300.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Capitalized Contract Cost [Line Items]
Remaining performance obligation, percentage	47.00%
Performance obligations expected to be satisfied, expected timing	24 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Capitalized Contract Cost [Line Items]
Remaining performance obligation, percentage	39.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01 | Minimum
Capitalized Contract Cost [Line Items]
Performance obligations expected to be satisfied, expected timing	25 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01 | Maximum
Capitalized Contract Cost [Line Items]
Performance obligations expected to be satisfied, expected timing	48 months