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Commitments and Contingencies - Schedule of Contingent Liabilities (Detail) - USD ($)
$ in Millions
Apr. 30, 2020
Oct. 31, 2019
Commitments And Contingencies Disclosure [Abstract]    
Performance, bid and specialty bonds $ 340.0 $ 229.9
Open standby letters of credit 10.4 14.3
Total $ 350.4 $ 244.2