Condensed Consolidating Financial Statements (Schedule Of Condensed Consolidating Income Statements) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 2,327,915	$ 451,882	$ 131,332	$ 125,185	$ 2,297,477	$ 474,543	$ 128,415	$ 137,718	$ 3,036,314	$ 3,038,153	$ 3,078,658
Cost of revenues									1,644,377	1,685,552	1,630,490
Goodwill, Impairment Loss									0	0
Selling, general and administrative									675,953	719,409	653,502
Total operating expenses									2,320,330	2,404,961	2,283,992
Other income, net									6,254	5,249	(6,615)
Interest expense on borrowings									(92,951)	(68,962)	(45,246)
Income from continuing operations before income taxes	1,211,903	(150,598)	(228,469)	(203,549)	1,140,807	(146,500)	(237,719)	(187,109)	629,287	569,479	742,805
Income taxes (benefit)	425,333	(49,386)	(85,054)	(82,523)	439,582	(67,851)	(95,201)	(90,604)	208,370	185,926	256,061
Net income (loss) from continuing operations	786,570	(101,212)	(143,415)	(121,026)	701,225	(78,649)	(142,518)	(96,505)	420,917	383,553	486,744
Net loss from discontinued operations, net of tax benefits of $6,986, $5,414 and $8,125	(3,218)	(3,302)	(2,805)	(2,647)	(563)	(3,080)	(2,489)	(3,154)	(11,972)	(9,286)	(13,081)
NET INCOME	$ 783,352	$ (104,514)	$ (146,220)	$ (123,673)	$ 700,662	$ (81,729)	$ (145,007)	$ (99,659)	408,945	374,267	473,663
Other comprehensive loss									(4,066)	(12,973)	(3,437)
Comprehensive income									404,879	361,294	470,226
H&R Block, Inc. (Guarantor)
Condensed Financial Statements, Captions [Line Items]
Selling, general and administrative										2,537
Total operating expenses										2,537
Other income, net									399,996	375,136	475,336
Income from continuing operations before income taxes									399,996	372,599	475,336
Income taxes (benefit)									(8,949)	(1,668)	1,673
Net income (loss) from continuing operations									408,945	374,267	473,663
Net loss from discontinued operations, net of tax benefits of $6,986, $5,414 and $8,125									0
NET INCOME									408,945	374,267	473,663
Other comprehensive loss									(4,066)	(12,973)	(3,437)
Comprehensive income									404,879	361,294	470,226
Other Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenues									2,877,265	2,868,343	2,858,474
Cost of revenues									1,580,425	1,588,450	1,540,091
Selling, general and administrative									671,653	703,375	634,456
Total operating expenses									2,252,078	2,291,825	2,174,547
Other income, net									9,330	(9,965)	35,458
Interest expense on borrowings									(688)	(431)	(362)
Income from continuing operations before income taxes									633,829	566,122	719,023
Income taxes (benefit)									210,847	186,183	251,786
Net income (loss) from continuing operations									422,982	379,939	467,237
Net loss from discontinued operations, net of tax benefits of $6,986, $5,414 and $8,125									733		3,644
NET INCOME									423,715	379,939	470,881
Other comprehensive loss									(4,066)	(12,973)	(3,437)
Comprehensive income									419,649	366,966	467,444
Eliminations
Condensed Financial Statements, Captions [Line Items]
Total revenues									(27,610)	(22,888)	(6,101)
Cost of revenues									(7,709)	(5,605)	(6,094)
Selling, general and administrative									(19,901)	(17,283)	(7)
Total operating expenses									(27,610)	(22,888)	(6,101)
Other income, net									(428,433)	(381,395)	(519,182)
Income from continuing operations before income taxes									(428,433)	(381,395)	(519,182)
Net income (loss) from continuing operations									(428,433)	(381,395)	(519,182)
NET INCOME									(428,433)	(381,395)	(519,182)
Other comprehensive loss									4,066	21,417	(3,301)
Comprehensive income									(424,367)	(359,978)	(522,483)
Block Financial (Issuer)
Condensed Financial Statements, Captions [Line Items]
Total revenues									186,659	192,698	226,285
Cost of revenues									71,661	102,707	96,493
Selling, general and administrative									24,201	30,780	19,053
Total operating expenses									95,862	133,487	115,546
Other income, net									25,361	21,473	1,773
Interest expense on borrowings									(92,263)	(68,531)	(44,884)
Income from continuing operations before income taxes									23,895	12,153	67,628
Income taxes (benefit)									6,472	1,411	2,602
Net income (loss) from continuing operations									17,423	10,742	65,026
Net loss from discontinued operations, net of tax benefits of $6,986, $5,414 and $8,125									(12,705)	(9,286)	(16,725)
NET INCOME									4,718	1,456	48,301
Other comprehensive loss										(8,444)	6,738
Comprehensive income									$ 4,718	$ (6,988)	$ 55,039