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

Accumulated Other Comprehensive Income (Details)

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Accumulated Other Comprehensive Income (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Mar. 31, 2011
Accumulated other comprehensive income    
Pension and post-retirement benefit adjustments $ (0.3) $ (0.3)
Unrealised gain on investments 2.6 2.5
Foreign currency translation adjustments 47.1 53.0
Total accumulated other comprehensive income $ 49.4 $ 55.2