Annual report pursuant to Section 13 and 15(d)

Contract Assets and Liabilities - Narrative (Details)

v3.19.3.a.u2
Contract Assets and Liabilities - Narrative (Details)
$ in Millions
Sep. 30, 2019
USD ($)
Contractors [Abstract]  
Revenue, remaining performance obligation, amount $ 481.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01  
Contractors [Abstract]  
Revenue, remaining performance obligation, amount $ 94.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Expected timing of satisfaction, period 12 months