Condensed Consolidating Financial Statements (Operations) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended
	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 160,801				$ 148,871		$ 311,163	$ 294,054
Cost of revenues	253,206				250,815		482,598	472,375
Selling, general and administrative	150,334				113,319		266,470	219,059
Total operating expenses	403,540				364,134		749,068	691,434
Other income (expense), net	2,739				4,464		11,862	9,006
Interest expense on external borrowings	(21,306)				(21,191)		(42,377)	(42,381)
Loss from continuing operations before income tax benefit	(261,306)				(231,990)		(468,420)	(430,755)
Income tax benefit	(77,752)				(61,053)		(139,142)	(111,021)
Net loss from continuing operations	(183,554)				(170,937)		(329,278)	(319,734)
Net income (loss) from discontinued operations	(4,445)				(5,339)		(8,968)	(9,212)
Net loss	(187,999)	$ (150,247)	$ 877,909	$ (126,454)	(176,276)	$ (152,670)	(338,246)	(328,946)
Other comprehensive income (loss)	919				(2,846)		(1,401)	(4,577)
Comprehensive loss	(187,080)				(179,122)		(339,647)	(333,523)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Total revenues	(3,730)				(4,741)		(6,961)	(7,867)
Cost of revenues	(173)				(2,168)		(695)	(2,759)
Selling, general and administrative	(3,557)				(2,573)		(6,266)	(5,108)
Total operating expenses	(3,730)				(4,741)		(6,961)	(7,867)
Other income (expense), net	179,932				172,829		316,442	314,112
Interest expense on external borrowings	0				0		0	0
Loss from continuing operations before income tax benefit	179,932				172,829		316,442	314,112
Income tax benefit	0				0		0	0
Net loss from continuing operations	179,932				172,829		316,442	314,112
Net income (loss) from discontinued operations	0				0		0	0
Net loss	179,932				172,829		316,442	314,112
Other comprehensive income (loss)	(919)				2,846		1,401	4,577
Comprehensive loss	179,013				175,675		317,843	318,689
H&R Block, Inc. (Guarantor) | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Total revenues	0				0		0	0
Cost of revenues	0				0		0	0
Selling, general and administrative	1,538				1,476		1,538	1,476
Total operating expenses	1,538				1,476		1,538	1,476
Other income (expense), net	(188,397)				(176,485)		(340,149)	(330,101)
Interest expense on external borrowings	0				0		0	0
Loss from continuing operations before income tax benefit	(189,935)				(177,961)		(341,687)	(331,577)
Income tax benefit	(1,936)				(1,685)		(3,441)	(2,631)
Net loss from continuing operations	(187,999)				(176,276)		(338,246)	(328,946)
Net income (loss) from discontinued operations	0				0		0	0
Net loss	(187,999)				(176,276)		(338,246)	(328,946)
Other comprehensive income (loss)	919				(2,846)		(1,401)	(4,577)
Comprehensive loss	(187,080)				(179,122)		(339,647)	(333,523)
Block Financial (Issuer) | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Total revenues	11,750				11,458		28,284	28,290
Cost of revenues	4,866				7,014		10,082	12,047
Selling, general and administrative	5,290				2,847		8,187	6,097
Total operating expenses	10,156				9,861		18,269	18,144
Other income (expense), net	9,995				9,018		20,492	18,845
Interest expense on external borrowings	(21,300)				(21,126)		(42,356)	(42,249)
Loss from continuing operations before income tax benefit	(9,711)				(10,511)		(11,849)	(13,258)
Income tax benefit	(2,832)				(2,316)		(3,010)	(6,017)
Net loss from continuing operations	(6,879)				(8,195)		(8,839)	(7,241)
Net income (loss) from discontinued operations	(4,445)				(5,339)		(8,968)	(9,212)
Net loss	(11,324)				(13,534)		(17,807)	(16,453)
Other comprehensive income (loss)	0				0		0	0
Comprehensive loss	(11,324)				(13,534)		(17,807)	(16,453)
Other Subsidiaries | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Total revenues	152,781				142,154		289,840	273,631
Cost of revenues	248,513				245,969		473,211	463,087
Selling, general and administrative	147,063				111,569		263,011	216,594
Total operating expenses	395,576				357,538		736,222	679,681
Other income (expense), net	1,209				(898)		15,077	6,150
Interest expense on external borrowings	(6)				(65)		(21)	(132)
Loss from continuing operations before income tax benefit	(241,592)				(216,347)		(431,326)	(400,032)
Income tax benefit	(72,984)				(57,052)		(132,691)	(102,373)
Net loss from continuing operations	(168,608)				(159,295)		(298,635)	(297,659)
Net income (loss) from discontinued operations	0				0		0	0
Net loss	(168,608)				(159,295)		(298,635)	(297,659)
Other comprehensive income (loss)	919				(2,846)		(1,401)	(4,577)
Comprehensive loss	$ (167,689)				$ (162,141)		$ (300,036)	$ (302,236)