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 (Details)

v3.21.1
Asbestos - Summary of Net Unfunded AFFA Liability, Net of Tax (Details)
$ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2021
AUD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2020
AUD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2019
AUD ($)
Asbestos Net Liability [Roll Forward]            
Change in claims handling cost estimate $ (1.5)   $ 0.1   $ 1.1  
Net Unfunded AFFA Liability, net of tax            
Asbestos Net Liability [Roll Forward]            
Net Unfunded AFFA liability, net of tax, Beginning Balance (544.4)          
Asbestos claims paid 0.0          
Payment received in accordance with AFFA 153.3          
AICF claims-handling costs incurred (paid) 0.0          
AICF operating costs paid - non claims-handling (1.2)          
Change in actuarial estimate (31.0)          
Change in claims handling cost estimate (1.5)          
Impact on deferred income tax due to change in actuarial estimate 9.7          
Insurance recoveries 0.0          
Movement in income tax payable (26.1)          
Other movements 10.1          
Effect of foreign exchange (123.0)          
Net Unfunded AFFA liability, net of tax, Ending Balance (554.1)   (544.4)      
Deferred Tax Assets            
Asbestos Net Liability [Roll Forward]            
Asbestos, deferred tax assets, beginning balance 367.4   319.1      
Impact on deferred income tax due to change in actuarial estimate 9.7          
Movement in income tax payable (33.5)          
Other movements 0.2          
Effect of foreign exchange 71.9          
Asbestos, deferred tax assets, beginning balance 367.4   319.1      
Income Tax Payable            
Asbestos Net Liability [Roll Forward]            
Asbestos, income tax payable, beginning balance 23.4          
Movement in income tax payable 7.4          
Effect of foreign exchange 4.4          
Asbestos, income tax payable, ending balance 35.2   23.4      
Net Unfunded AFFA Liability            
Asbestos Net Liability [Roll Forward]            
Asbestos, net liability, beginning balance (886.9)          
Payment received in accordance with AFFA 153.3          
AICF operating costs paid - non claims-handling (1.2)          
Change in actuarial estimate (31.0)          
Change in claims handling cost estimate (1.5)          
Other movements 9.9          
Effect of foreign exchange (199.3)          
Asbestos net liability, ending balance (956.7)   (886.9)      
Asbestos   Liability               
Asbestos Net Liability [Roll Forward]            
Asbestos, net liability, beginning balance (986.4)          
Asbestos claims paid 105.3 $ 146.5        
AICF claims-handling costs incurred (paid) 1.1          
Change in actuarial estimate (33.0)          
Change in claims handling cost estimate (1.5)          
Effect of foreign exchange (221.3)          
Asbestos net liability, ending balance (1,135.8)   (986.4)      
Insurance Receivables            
Asbestos Net Liability [Roll Forward]            
Asbestos, net liability, beginning balance 43.5          
Change in actuarial estimate 2.0          
Insurance recoveries (5.8)          
Effect of foreign exchange 9.8          
Asbestos net liability, ending balance 49.5   43.5      
Restricted Cash and Investments            
Asbestos Net Liability [Roll Forward]            
Asbestos, net liability, beginning balance 58.0          
Asbestos claims paid (105.3)          
Payment received in accordance with AFFA 153.3 $ 220.9 108.9 $ 156.7 $ 103.0 $ 138.4
AICF claims-handling costs incurred (paid) (1.1)          
AICF operating costs paid - non claims-handling (1.2)          
Insurance recoveries 5.8          
Other movements 9.5          
Effect of foreign exchange 12.5          
Asbestos net liability, ending balance 131.5   58.0      
Other Assets and Liabilities            
Asbestos Net Liability [Roll Forward]            
Asbestos, net liability, beginning balance (2.0)          
Other movements 0.4          
Effect of foreign exchange (0.3)          
Asbestos net liability, ending balance $ (1.9)   $ (2.0)