Annual report pursuant to Section 13 and 15(d)

Construction Contract and Other Service Revenues (Narrative 2) (Details)

v3.19.3.a.u2
Construction Contract and Other Service Revenues (Narrative 2) (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 79.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 29.0
Disaggregation of Revenue [Line Items]  
Expected timing 1 year