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Loss Per Share And Stockholders' Equity (Narrative) (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2012 | Oct. 31, 2011 | Oct. 31, 2012 | Oct. 31, 2011
Loss Per Share And Stockholders' Equity [Abstract] |  |  |  |
Common stock excluded from diluted earnings per share computation | 8,900,000 | 13,000,000 | 8,900,000 | 13,000,000
Weighted average shares outstanding | 271,145,000 | 299,895,000 | 274,150,000 | 302,693,000
Repurchased and retired H&R Block common stock, shares |  |  | 21,300,000 | 13,000,000
Retirement of common shares, value |  |  | $ 315,000,000 | $ 177,500,000
Treasury stock retired |  |  | 60,000,000 |
Purchase of H&R Block common stock, shares |  |  | 100,000 | 200,000
Purchase of H&R Block common stock, value |  |  | 2,400,000 | 2,700,000
Common stock shares issued |  |  | 500,000 | 800,000
Stock options granted in period |  |  | 300,000 |
Nonvested shares granted in period |  |  | 1,400,000 |
Weighted average fair value of options granted |  |  | $ 2.36 |
Awards vesting period (in years) |  |  | 3 years |
Stock-based compensation expenses | 5,400,000 | 4,500,000 | 7,800,000 | 7,800,000
Unrecognized compensation cost, options |  |  | 5,200,000 |
Unrecognized compensation cost, nonvested shares | $ 28,400,000 |  | $ 28,400,000 |

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