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