LONG-TERM DEBT - Surety Bonds, Letters of Credit and Guarantees - Narrative (Detail) $ in Millions	Sep. 30, 2017 USD ($)
Surety bonds
Guarantor Obligations [Line Items]
Guarantees obligations	$ 72.1
Commercial standby letters of credit
Guarantor Obligations [Line Items]
Guarantees obligations	144.5
Bank guarantees
Guarantor Obligations [Line Items]
Guarantees obligations	36.6
Bank guarantees backed by cash collateral
Guarantor Obligations [Line Items]
Guarantees obligations	17.3
Letters of credit backed by cash collateral
Guarantor Obligations [Line Items]
Guarantees obligations	$ 28.8