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

Asbestos - Central Estimates, Net of Insurance Recoveries (Detail)

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Asbestos - Central Estimates, Net of Insurance Recoveries (Detail) - Mar. 31, 2020
$ in Millions, $ in Millions
USD ($)
AUD ($)
Central Estimate – Discounted and Inflated    
Asbestos Claims [Line Items]    
Asbestos Liability Actuarial Estimate $ 1,250.9 $ 2,025.2
Range Of Discounted Actuarial Estimate Minimum 913.0 1,478.2
Range Of Discounted Actuarial Estimate Maximum 2,109.3 3,414.9
Central Estimate – Undiscounted but Inflated    
Asbestos Claims [Line Items]    
Asbestos Liability Actuarial Estimate 1,368.3 2,215.2
Central Estimate – Undiscounted but Inflated | Minimum    
Asbestos Claims [Line Items]    
Range Of Un Discounted Actuarial Estimate Minimum 984.3 1,593.6
Central Estimate – Undiscounted but Inflated | Maximum    
Asbestos Claims [Line Items]    
Range Of Un Discounted Actuarial Estimate Maximum 2,385.2 3,861.7
Central Estimate – Undiscounted and Uninflated    
Asbestos Claims [Line Items]    
Asbestos Liability Actuarial Estimate $ 897.1 $ 1,452.4