CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Operations) (Details) - USD ($) $ in Thousands	3 Months Ended							9 Months Ended
	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Jan. 31, 2020	Jan. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 519,205				$ 468,384			$ 830,368	$ 762,438
Costs of revenues	462,521				421,026			945,119	893,401
Selling, general and administrative	209,288				185,458			475,758	404,517
Total operating expenses	671,809				606,484			1,420,877	1,297,918
Other income (expense), net	1,879				2,269			13,741	11,275
Interest expense on borrowings	(26,305)				(22,833)			(68,682)	(65,214)
Loss from continuing operations before income tax benefit	(177,030)				(158,664)			(645,450)	(589,419)
Income tax benefit	(49,004)				(38,885)			(188,146)	(149,906)
Net loss from continuing operations attributable to shareholders	(128,026)				(119,779)			(457,304)	(439,513)
Net income (loss) from discontinued operations	(1,657)				(6,675)			(10,625)	(15,887)
Net loss	(129,683)	$ (187,999)	$ (150,247)	$ 877,909	(126,454)	$ (176,276)	$ (152,670)	(467,929)	(455,400)
Other comprehensive income (loss)	(3,574)				1,238			(4,975)	(3,339)
Comprehensive loss	(133,257)				(125,216)			(472,904)	(458,739)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Total revenues	(17,730)				(18,221)			(24,691)	(26,088)
Costs of revenues	(12,138)				(10,179)			(12,833)	(12,938)
Selling, general and administrative	(5,592)				(8,042)			(11,858)	(13,150)
Total operating expenses	(17,730)				(18,221)			(24,691)	(26,088)
Other income (expense), net	120,057				128,002			436,499	442,114
Interest expense on borrowings	0				0			0	0
Loss from continuing operations before income tax benefit	120,057				128,002			436,499	442,114
Income tax benefit	0				0			0	0
Net loss from continuing operations attributable to shareholders	120,057				128,002			436,499	442,114
Net income (loss) from discontinued operations	0				0			0	0
Net loss	120,057				128,002			436,499	442,114
Other comprehensive income (loss)	3,574				(1,238)			4,975	3,339
Comprehensive loss	123,631				126,764			441,474	445,453
H&R Block, Inc. (Guarantor) | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Total revenues	0				0			0	0
Costs of revenues	0				0			0	0
Selling, general and administrative	128				0			1,666	1,476
Total operating expenses	128				0			1,666	1,476
Other income (expense), net	(137,783)				(134,984)			(477,932)	(465,085)
Interest expense on borrowings	0				0			0	0
Loss from continuing operations before income tax benefit	(137,911)				(134,984)			(479,598)	(466,561)
Income tax benefit	(8,228)				(8,530)			(11,669)	(11,161)
Net loss from continuing operations attributable to shareholders	(129,683)				(126,454)			(467,929)	(455,400)
Net income (loss) from discontinued operations	0				0			0	0
Net loss	(129,683)				(126,454)			(467,929)	(455,400)
Other comprehensive income (loss)	(3,574)				1,238			(4,975)	(3,339)
Comprehensive loss	(133,257)				(125,216)			(472,904)	(458,739)
Block Financial (Issuer) | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Total revenues	58,231				53,461			86,515	81,751
Costs of revenues	35,598				34,533			45,680	46,580
Selling, general and administrative	7,132				10,347			15,319	16,444
Total operating expenses	42,730				44,880			60,999	63,024
Other income (expense), net	11,086				8,903			31,578	27,748
Interest expense on borrowings	(26,300)				(22,833)			(68,656)	(65,082)
Loss from continuing operations before income tax benefit	287				(5,349)			(11,562)	(18,607)
Income tax benefit	(37)				75			(3,047)	(5,942)
Net loss from continuing operations attributable to shareholders	324				(5,424)			(8,515)	(12,665)
Net income (loss) from discontinued operations	(1,037)				(6,675)			(10,005)	(15,887)
Net loss	(713)				(12,099)			(18,520)	(28,552)
Other comprehensive income (loss)	0				0			0	0
Comprehensive loss	(713)				(12,099)			(18,520)	(28,552)
Other Subsidiaries | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Total revenues	478,704				433,144			768,544	706,775
Costs of revenues	439,061				396,672			912,272	859,759
Selling, general and administrative	207,620				183,153			470,631	399,747
Total operating expenses	646,681				579,825			1,382,903	1,259,506
Other income (expense), net	8,519				348			23,596	6,498
Interest expense on borrowings	(5)				0			(26)	(132)
Loss from continuing operations before income tax benefit	(159,463)				(146,333)			(590,789)	(546,365)
Income tax benefit	(40,739)				(30,430)			(173,430)	(132,803)
Net loss from continuing operations attributable to shareholders	(118,724)				(115,903)			(417,359)	(413,562)
Net income (loss) from discontinued operations	(620)				0			(620)	0
Net loss	(119,344)				(115,903)			(417,979)	(413,562)
Other comprehensive income (loss)	(3,574)				1,238			(4,975)	(3,339)
Comprehensive loss	$ (122,918)				$ (114,665)			$ (422,954)	$ (416,901)