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

Asbestos - Summary of Changes in Insurance Receivable (Detail)

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Asbestos - Summary of Changes in Insurance Receivable (Detail)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2014
USD ($)
Mar. 31, 2014
AUD
Mar. 31, 2013
USD ($)
Insurance [Abstract]      
Insurance receivables - Beginning Balance $ 231.6 222.3  
Insurance recoveries (25.7) (27.5)  
Recovery of Insurance Receivables 15.2 16.5 11.9
Change in actuarial estimate 31.2 34.0  
Effect of foreign exchange (26.2)    
Insurance receivables - Ending Balance $ 226.1 245.3 $ 231.6
Exchange rate, Beginning balance 0.9597 0.9597  
Insurance recoveries, Exchange rate 1.0716 1.0716  
Recovery of Insurance Receivables, Exchange rate 1.0845 1.0845  
Change in actuarial estimate, Exchange rate 1.0845 1.0845  
Exchange rate, Ending balance 1.0845 1.0845 0.9597