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

Asbestos - Changes in Deferred Income Taxes (Detail)

v2.4.0.6
Asbestos - Changes in Deferred Income Taxes (Detail)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2013
USD ($)
Rate
Mar. 31, 2013
AUD
Mar. 31, 2012
USD ($)
Rate
Asbestos Claims [Line Items]      
Deferred tax assets - Beginning balance $ 444.5 427.3  
Amounts offset against income tax payable (25.6) (24.8) (23.1)
AICF earnings 32.9 31.9  
Gain on foreign currency exchange 0.9    
Deferred tax assets - Ending balance $ 452.7 434.4 $ 444.5
Exchange rate, Beginning balance 0.9614 0.9614  
Amounts offset against income tax payable, Exchange rate 0.9694 0.9694  
AICF earnings, Exchange rate 0.9694 0.9694  
Exchange rate, Ending balance 0.9597 0.9597 0.9614