Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Asbestos - Summary of Net Unfunded AFFA Liability, Net of Tax 2 (Detail)

v3.8.0.1
Asbestos - Summary of Net Unfunded AFFA Liability, Net of Tax 2 (Detail)
$ in Millions, $ in Millions
12 Months Ended 48 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2018
AUD ($)
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2018
AUD ($)
Asbestos Claims [Line Items]            
Payment to fund $ 102.2   $ 91.1 $ 62.8 $ 369.1 $ 456.8
Translation of payments at exchange rate, number of days prior to payment date 5 days 5 days        
Asbestos Liability [Member]            
Asbestos Claims [Line Items]            
Asbestos claims paid $ 103.1 $ 133.2        
AICF Funding [Member]            
Asbestos Claims [Line Items]            
Payment to fund $ 102.2 $ 135.1