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Regulatory Requirements (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Apr. 30, 2011
Apr. 30, 2010
Apr. 30, 2009
Leverage ratio 30.8    
Capital contributions to HRB Bank to meet capital requirements $ 235.0 $ 235.0 $ 245.0
Dividend and return of capital return 262.5    
REO Properties and Loans [Member]
     
Dividend and return of capital return 37.5    
Cash Distribution [Member]
     
Dividend and return of capital return $ 225.0