Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Remaining Performance Obligations (Narrative) (Details)

v3.20.4
Revenue Recognition - Remaining Performance Obligations (Narrative) (Details)
Dec. 31, 2020
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, percentage 58.00%
Remaining performance obligation, expected timing of satisfaction, period 12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, percentage 42.00%
Remaining performance obligation, expected timing of satisfaction, period