Summary of Significant Accounting Principles - Remaining Performance Obligation (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied	$ 572.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied	$ 465.1
Performance obligations expected to be satisfied, percentage	81.00%
Performance obligations expected to be satisfied, expected timing	12 months