Quarterly report pursuant to Section 13 or 15(d)

Revenue (Narrative) (Details)

v3.21.2
Revenue (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenue from Contract with Customer [Abstract]        
Remaining performance obligations $ 24.1   $ 24.1  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with customer, liability, revenue recognized 4.3 $ 4.2 10.9 $ 8.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01        
Revenue from Contract with Customer [Abstract]        
Remaining performance obligations $ 13.8   $ 13.8  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Performance obligations expected to be satisfied, expected timing 12 months   12 months