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Long Term Debt - Guarantees (Narrative) (Detail)
$ in Millions
Sep. 30, 2015
USD ($)
Surety Bond [Member]  
Guarantee Obligations [Line Items]  
Gurantees Obligations $ 63.4
Commercial standby letters of credit [Member]  
Guarantee Obligations [Line Items]  
Gurantees Obligations 106.1
Bank Gurantees [Member]  
Guarantee Obligations [Line Items]  
Gurantees Obligations 58.7
Bank Gurantees Collaterized [Member]  
Guarantee Obligations [Line Items]  
Gurantees Obligations $ 12.4