Condensed Consolidating Financial Statements (Schedule Of Condensed Consolidating Balance Sheets) (Details) - USD ($) $ in Thousands	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,011,331	$ 896,801	$ 2,007,190	$ 2,185,307
Cash & cash equivalents - restricted	106,208	104,110
Receivables, net	162,775	153,116
Prepaid expenses and other current assets	65,725	66,574
Total current assets	1,346,039	1,220,601
Mortgage loans held for investment, net	0	202,385
Property and equipment, at cost, less accumulated depreciation and amortization of $678,161 and $601,120	263,827	293,565
Intangible assets, net	409,364	433,885
Goodwill	491,207	470,757	441,831
Deferred tax assets and income taxes receivable	83,728	120,123
Amounts due from affiliates	0	0
Other noncurrent assets	99,943	105,909
Total assets	2,694,108	2,847,225
Accounts payable and accrued expenses	217,028	259,586
Accrued salaries, wages and payroll taxes	183,856	161,786
Accrued income taxes and reserves for uncertain tax positions	348,199	373,754
Current portion of long-term debt	981	826
Deferred revenue and other current liabilities	189,216	243,653
Total current liabilities	939,280	1,039,605
Deferred revenue and other noncurrent liabilities	1,493,017	1,491,375
Reserves for uncertain tax positions	159,085	132,960
Deferred revenue and other noncurrent liabilities	163,609	160,182
Total liabilities	0
Total liabilities	2,754,991	2,824,122
Common stock, no par, stated value $.01 per share, 800,000,000 shares authorized, shares issued of 246,198,878 and 260,218,666	2,462	2,602
Accumulated other comprehensive loss	(15,299)	(11,233)
Retained earnings (deficit)	(48,206)	40,347
Stockholders' equity	(60,883)	23,103	1,832,949	1,556,549
Total liabilities and stockholders' equity	2,694,108	2,847,225
H&R Block, Inc. (Guarantor)
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents		0	0	0
Deferred tax assets and income taxes receivable	5,587	5,917
Investments in subsidiaries	2,158,234	1,738,643
Amounts due from affiliates	0	0
Total assets	2,163,821	1,744,560
Accounts payable and accrued expenses	2,086	1,531
Accrued salaries, wages and payroll taxes		0
Current portion of long-term debt		0
Deferred revenue and other current liabilities		0
Total current liabilities	2,086	1,531
Reserves for uncertain tax positions	28,324	5,917
Total liabilities	2,194,294	1,714,009
Total liabilities	2,224,704	1,721,457
Stockholders' equity	(60,883)	23,103
Total liabilities and stockholders' equity	2,163,821	1,744,560
Other Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	1,006,845	887,776	1,529,553	1,574,031
Cash & cash equivalents - restricted	98,148	75,106
Receivables, net	101,525	81,234
Prepaid expenses and other current assets	63,445	59,649
Total current assets	1,269,963	1,103,765
Property and equipment, at cost, less accumulated depreciation and amortization of $678,161 and $601,120	263,749	293,429
Intangible assets, net	409,364	433,885
Goodwill	491,207	470,757
Deferred tax assets and income taxes receivable	47,398	36,936
Investments in subsidiaries	113,714	108,995
Amounts due from affiliates	2,194,294	1,714,009
Other noncurrent assets	48,114	43,103
Total assets	4,837,803	4,204,879
Accounts payable and accrued expenses	200,724	239,459
Accrued salaries, wages and payroll taxes	183,005	160,020
Accrued income taxes and reserves for uncertain tax positions	348,199	320,778
Current portion of long-term debt	981	826
Deferred revenue and other current liabilities	162,457	155,671
Total current liabilities	895,366	876,754
Deferred revenue and other noncurrent liabilities	5,628	6,609
Reserves for uncertain tax positions	122,724	116,257
Deferred revenue and other noncurrent liabilities	162,656	159,004
Total liabilities	1,493,195	1,307,612
Total liabilities	2,679,569	2,466,236
Stockholders' equity	2,158,234	1,738,643
Total liabilities and stockholders' equity	4,837,803	4,204,879
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	(440)	(1,100)
Total current assets	0
Investments in subsidiaries	(2,271,948)	(1,847,638)
Amounts due from affiliates	(3,687,489)	(3,021,621)
Total assets	(5,959,437)	(4,869,259)
Total liabilities	(3,687,489)	(3,021,621)
Total liabilities	(3,687,489)	(3,021,621)
Stockholders' equity	(2,271,948)	(1,847,638)
Total liabilities and stockholders' equity	(5,959,437)	(4,869,259)
Block Financial (Issuer)
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	4,486	9,025	$ 478,077	$ 612,376
Cash & cash equivalents - restricted	8,060	29,004
Receivables, net	61,250	71,882
Prepaid expenses and other current assets	2,280	6,925
Total current assets	76,076	116,836
Mortgage loans held for investment, net		202,385
Property and equipment, at cost, less accumulated depreciation and amortization of $678,161 and $601,120	78	136
Deferred tax assets and income taxes receivable	30,743	77,270
Amounts due from affiliates	1,493,195	1,307,612
Other noncurrent assets	51,829	62,806
Total assets	1,651,921	1,767,045
Accounts payable and accrued expenses	14,218	18,596
Accrued salaries, wages and payroll taxes	851	1,766
Accrued income taxes and reserves for uncertain tax positions		52,976
Current portion of long-term debt		0
Deferred revenue and other current liabilities	26,759	87,982
Total current liabilities	41,828	161,320
Deferred revenue and other noncurrent liabilities	1,487,389	1,484,766
Reserves for uncertain tax positions	8,037	10,786
Deferred revenue and other noncurrent liabilities	953	1,178
Total liabilities	1,538,207	1,658,050
Stockholders' equity	113,714	108,995
Total liabilities and stockholders' equity	$ 1,651,921	$ 1,767,045