Annual report pursuant to Section 13 and 15(d)

Revenue - Narrative (Details)

v3.20.4
Revenue - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining performance obligation $ 283.4  
Revenue recognized included in contract liability balance 23.5 $ 19.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining performance obligation $ 216.9  
Period of recognition 12 months