Annual report pursuant to Section 13 and 15(d)

Commitments and contingencies - Narrative (Details)

v3.21.2
Commitments and contingencies - Narrative (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Loss Contingencies [Line Items]  
Performance bond commitments $ 36.1
Settled Litigation  
Loss Contingencies [Line Items]  
Disallowance 7.3
Pending Litigation  
Loss Contingencies [Line Items]  
Disallowance $ 19.9