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

Asbestos - Asbestos Adjustments (Detail)

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Asbestos - Asbestos Adjustments (Detail)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2014
USD ($)
Mar. 31, 2014
AUD
Mar. 31, 2013
USD ($)
Mar. 31, 2012
USD ($)
Change in estimates:        
Change in actuarial estimate - asbestos liability $ (340.3) (369.1) $ (163.0) $ (67.8)
Change in actuarial estimate - insurance receivable 31.2   27.9 49.8
Change in estimate - AICF claims-handling costs 0.9 1.0 5.9 8.4
Subtotal - Change in estimates (308.2)   (129.2) (9.6)
Recovery of Insurance Receivables 15.2 16.5 11.9  
Gain (loss) on foreign currency exchange 97.2   0.2 (6.2)
Total Asbestos Adjustments $ (195.8)   $ (117.1) $ (15.8)