Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Revenue - Unsatisfied Performance Obligations (Details)

v3.20.1
Summary of Significant Accounting Policies - Revenue - Unsatisfied Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
$ in Millions
Mar. 31, 2020
USD ($)
Unsatisfied Performance Obligations  
Remaining performance obligation $ 82.4
Remaining performance obligation, expected timing of satisfaction, period 15 years
Remaining performance obligation, expected timing of satisfaction, year 2035