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

Capital Management and Dividends - Additional Information (Detail)

v2.4.0.6
Capital Management and Dividends - Additional Information (Detail)
In Millions, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended 1 Months Ended
May 31, 2013
USD ($)
Jan. 31, 2013
USD ($)
Jul. 31, 2012
USD ($)
Mar. 31, 2013
USD ($)
Mar. 31, 2012
USD ($)
Mar. 31, 2012
AUD
May 21, 2012
May 31, 2013
Special dividend declared [Member]
USD ($)
Aggregate number of shares acquired         3,400,000 3,400,000    
Aggregate cost of common stock         $ 19.0 19.1    
Average price paid per share of common stock         $ 5.55 5.59    
Percentage of stock repurchase program authorized             5.00%  
Number of securities bought back       0        
Total amount of dividend   $ 22.1 $ 166.4 $ 188.5 $ 17.4      
Interim ordinary dividend to shareholders   $ 0.05 $ 0.38          
Interim ordinary dividend to shareholders $ 0.13             $ 0.24
Dividend paid date       Jul. 26, 2013        
Dividend paid, record date       Jun. 28, 2013