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 (Parenthetical) (Detail)

v3.7.0.1
Asbestos - Summary of Net Unfunded AFFA Liability, Net of Tax (Parenthetical) (Detail)
AUD in Millions, $ in Millions
12 Months Ended
Mar. 31, 2017
USD ($)
Mar. 31, 2017
AUD
Mar. 31, 2016
USD ($)
Mar. 31, 2015
USD ($)
Asbestos Claims [Line Items]        
Income tax payable $ 16.8   $ 19.6  
Other assets and liabilities of AICF 1.6   1.0  
Payment received in accordance with AFFA $ 91.1 AUD 120.7    
Translation of payments at exchange rate, number of days prior to payment date 5 days 5 days    
Asbestos adjustments $ (40.4)   $ (5.5) $ (33.4)
Effect of foreign exchange (2.7)      
Gain loss on foreign currency forward contract of AICF payment 0.9      
Minimum [Member]        
Asbestos Claims [Line Items]        
Asbestos adjustments 40.4      
Effect of foreign exchange $ 2.7