XML 101 R84.htm IDEA: XBRL DOCUMENT v3.8.0.1
Post Retirement Benefit Plans - Future Benefit Payments Next Five Years and Thereafter (Detail)
$ in Millions
Oct. 31, 2017
USD ($)
Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
2018 $ 38.2
2019 39.1
2020 38.5
2021 39.5
2022 41.4
2023-2027 220.5
Other Postretirement Benefits Plan  
Defined Benefit Plan Disclosure [Line Items]  
2018 1.5
2019 1.2
2020 1.1
2021 1.1
2022 1.0
2023-2027 $ 4.4