Condensed Consolidating Financial Statements (Schedule Of Condensed Consolidating Balance Sheets) (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Cash & cash equivalents	$ 1,572,150	$ 1,544,944
Cash & cash equivalents - restricted	135,577	118,734
Receivables, net	138,965	146,774
Prepaid expenses and other current assets	146,667	81,261
Total current assets	1,993,359	1,891,713
Property and equipment, at cost, less accumulated depreciation and amortization of $745,761 and $745,397	212,092	231,888
Intangible assets, net	342,493	373,981
Goodwill	519,937	507,871	$ 491,207
Deferred tax assets and income taxes receivable	141,979	34,095
Amounts due from affiliates	0	0
Other noncurrent assets	90,085	101,401
Total assets	3,299,945	3,140,949
Accounts payable and accrued expenses	249,525	251,975
Accrued salaries, wages and payroll taxes	196,527	141,499
Accrued income taxes and reserves for uncertain tax positions	271,973	263,050
Current portion of long-term debt	0	1,026
Deferred revenue and other current liabilities	204,976	186,101
Total current liabilities	923,001	843,651
Deferred revenue and other noncurrent liabilities	1,492,629	1,494,609
Deferred tax liabilities and reserves for uncertain tax positions	197,906	229,430
Deferred revenue and other noncurrent liabilities	144,882	179,548
Total liabilities	0
Total liabilities	2,758,418	2,747,238
Stockholders' equity	541,527	393,711	$ (60,883)	$ 23,103
Total liabilities and stockholders' equity	3,299,945	3,140,949
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash & cash equivalents	0
Prepaid expenses and other current assets		(2,801)
Total current assets	0	(2,801)
Investments in subsidiaries	(3,515,742)	(2,933,123)
Amounts due from affiliates	(4,378,575)	(3,942,892)
Total assets	(7,894,317)	(6,878,816)
Accrued income taxes and reserves for uncertain tax positions		(2,801)
Total current liabilities		(2,801)
Total liabilities	(4,378,575)	(3,942,892)
Total liabilities	(4,378,575)	(3,945,693)
Stockholders' equity	(3,515,742)	(2,933,123)
Total liabilities and stockholders' equity	(7,894,317)	(6,878,816)
H&R Block, Inc. (Guarantor) | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Prepaid expenses and other current assets	2,812	2,801
Total current assets	2,812	2,801
Deferred tax assets and income taxes receivable	3,218	1,400
Investments in subsidiaries	3,378,009	2,801,808
Amounts due from affiliates	0	0
Total assets	3,384,039	2,806,009
Accounts payable and accrued expenses	2,272	2,074
Accrued salaries, wages and payroll taxes		0
Current portion of long-term debt		0
Deferred revenue and other current liabilities		0
Total current liabilities	2,272	2,074
Deferred tax liabilities and reserves for uncertain tax positions	24,623	9,286
Total liabilities	2,815,617	2,400,938
Total liabilities	2,842,512	2,412,298
Stockholders' equity	541,527	393,711
Total liabilities and stockholders' equity	3,384,039	2,806,009
Block Financial (Issuer) | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Cash & cash equivalents	4,109	4,346
Cash & cash equivalents - restricted		0
Receivables, net	35,901	51,562
Prepaid expenses and other current assets	1,695	1,954
Total current assets	41,705	57,862
Property and equipment, at cost, less accumulated depreciation and amortization of $745,761 and $745,397	552	467
Deferred tax assets and income taxes receivable	15,953	17,798
Amounts due from affiliates	1,562,958	1,541,954
Other noncurrent assets	54,976	50,073
Total assets	1,676,144	1,668,154
Accounts payable and accrued expenses	19,735	16,628
Accrued salaries, wages and payroll taxes	1,564	1,161
Accrued income taxes and reserves for uncertain tax positions	1,060	1,060
Current portion of long-term debt		0
Deferred revenue and other current liabilities	21,144	22,172
Total current liabilities	43,503	41,021
Deferred revenue and other noncurrent liabilities	1,492,629	1,490,007
Deferred tax liabilities and reserves for uncertain tax positions	1,486	4,963
Deferred revenue and other noncurrent liabilities	793	848
Total liabilities	1,538,411	1,536,839
Stockholders' equity	137,733	131,315
Total liabilities and stockholders' equity	1,676,144	1,668,154
Other Subsidiaries | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Cash & cash equivalents	1,568,041	1,540,598
Cash & cash equivalents - restricted	135,577	118,734
Receivables, net	103,064	95,212
Prepaid expenses and other current assets	142,160	79,307
Total current assets	1,948,842	1,833,851
Property and equipment, at cost, less accumulated depreciation and amortization of $745,761 and $745,397	211,540	231,421
Intangible assets, net	342,493	373,981
Goodwill	519,937	507,871
Deferred tax assets and income taxes receivable	122,808	14,897
Investments in subsidiaries	137,733	131,315
Amounts due from affiliates	2,815,617	2,400,938
Other noncurrent assets	35,109	51,328
Total assets	6,134,079	5,545,602
Accounts payable and accrued expenses	227,518	233,273
Accrued salaries, wages and payroll taxes	194,963	140,338
Accrued income taxes and reserves for uncertain tax positions	270,913	264,791
Current portion of long-term debt		1,026
Deferred revenue and other current liabilities	183,832	163,929
Total current liabilities	877,226	803,357
Deferred revenue and other noncurrent liabilities		4,602
Deferred tax liabilities and reserves for uncertain tax positions	171,797	215,181
Deferred revenue and other noncurrent liabilities	144,089	178,700
Total liabilities	1,562,958	1,541,954
Total liabilities	2,756,070	2,743,794
Stockholders' equity	3,378,009	2,801,808
Total liabilities and stockholders' equity	$ 6,134,079	$ 5,545,602