Condensed Consolidating Financial Statements (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities:	$ 606,538	$ 850,003	$ 552,197
Principal payments and sales of mortgage loans and real estate owned, net	0	0	207,174
Capital expenditures	(95,490)	(98,583)	(89,255)
Payments for business acquisitions, net of cash acquired	(43,637)	(42,539)	(54,816)
Franchise loans funded	(19,922)	(22,320)	(34,473)
Payments received on franchise loans	32,671	39,968	61,437
Intercompany borrowings (payments)			0
Other, net	(28,753)	11,417	9,252
Net cash provided by (used in) investing activities	(155,131)	(112,057)	99,319
Repayments of line of credit borrowings	(720,000)	(830,000)	(1,700,000)
Proceeds from line of credit borrowings	720,000	830,000	1,700,000
Dividends paid	(205,461)	(200,469)	(187,115)
Repurchase of common stock, including shares surrendered	(189,912)	(9,147)	(322,850)
Proceeds from exercise of stock options	2,532	28,340	2,371
Intercompany borrowings (payments)		0	0
Other, net	(10,854)	(9,388)	(22,830)
Net cash used in financing activities	(403,695)	(190,664)	(530,424)
Effects of exchange rate changes on cash	(3,663)	(1,143)	(4,464)
Net increase in cash and cash equivalents, including restricted balances	44,049	546,139	116,628
Cash, cash equivalents and restricted cash, beginning of the year	1,663,678	1,117,539	1,000,911
Cash, cash equivalents and restricted cash, end of the year	1,707,727	1,663,678	1,117,539
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities:			0
Principal payments and sales of mortgage loans and real estate owned, net			0
Capital expenditures			0
Payments for business acquisitions, net of cash acquired			0
Franchise loans funded			0
Payments received on franchise loans			0
Intercompany borrowings (payments)	416,038	220,175	702,376
Other, net			0
Net cash provided by (used in) investing activities	416,038	220,175	702,376
Repayments of line of credit borrowings		0	0
Proceeds from line of credit borrowings		0	0
Dividends paid		0	0
Repurchase of common stock, including shares surrendered		0	0
Proceeds from exercise of stock options		0	0
Intercompany borrowings (payments)	(416,038)	(220,175)	(702,376)
Other, net		0	0
Net cash used in financing activities	(416,038)	(220,175)	(702,376)
Net increase in cash and cash equivalents, including restricted balances	0	0	0
Cash, cash equivalents and restricted cash, beginning of the year	0	0	0
Cash, cash equivalents and restricted cash, end of the year		0	0
H&R Block, Inc. (Guarantor) | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities:			0
Principal payments and sales of mortgage loans and real estate owned, net			0
Capital expenditures			0
Payments for business acquisitions, net of cash acquired			0
Franchise loans funded			0
Payments received on franchise loans			0
Intercompany borrowings (payments)			0
Other, net			0
Net cash provided by (used in) investing activities			0
Repayments of line of credit borrowings		0	0
Proceeds from line of credit borrowings		0	0
Dividends paid	(205,461)	(200,469)	(187,115)
Repurchase of common stock, including shares surrendered	(189,912)	(9,147)	(322,850)
Proceeds from exercise of stock options	2,532	28,340	2,371
Intercompany borrowings (payments)	392,841	181,276	507,594
Other, net		0	0
Net cash used in financing activities		0	0
Net increase in cash and cash equivalents, including restricted balances	0	0	0
Cash, cash equivalents and restricted cash, beginning of the year	0	0	0
Cash, cash equivalents and restricted cash, end of the year		0	0
Block Financial (Issuer) | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities:	9,515	13,333	(66,499)
Principal payments and sales of mortgage loans and real estate owned, net			207,174
Capital expenditures	(334)	(506)	(32)
Payments for business acquisitions, net of cash acquired			0
Franchise loans funded	(19,128)	(21,890)	(34,136)
Payments received on franchise loans	32,213	39,263	61,102
Intercompany borrowings (payments)	(23,197)	(38,899)	(194,782)
Other, net	1,362	1,161	1,690
Net cash provided by (used in) investing activities	(9,084)	(20,871)	41,016
Repayments of line of credit borrowings	(720,000)	(830,000)	(1,700,000)
Proceeds from line of credit borrowings	720,000	830,000	1,700,000
Dividends paid		0	0
Repurchase of common stock, including shares surrendered		0	0
Proceeds from exercise of stock options		0	0
Intercompany borrowings (payments)		0	0
Other, net	(668)	(662)	0
Net cash used in financing activities	(668)	(662)	0
Net increase in cash and cash equivalents, including restricted balances	(237)	(8,200)	(25,483)
Cash, cash equivalents and restricted cash, beginning of the year	4,346	12,546	38,029
Cash, cash equivalents and restricted cash, end of the year	4,109	4,346	12,546
Other Subsidiaries | Reportable entities
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities:	597,023	836,670	618,696
Principal payments and sales of mortgage loans and real estate owned, net			0
Capital expenditures	(95,156)	(98,077)	(89,223)
Payments for business acquisitions, net of cash acquired	(43,637)	(42,539)	(54,816)
Franchise loans funded	(794)	(430)	(337)
Payments received on franchise loans	458	705	335
Intercompany borrowings (payments)	(392,841)	(181,276)	(507,594)
Other, net	(30,115)	10,256	7,562
Net cash provided by (used in) investing activities	(562,085)	(311,361)	(644,073)
Repayments of line of credit borrowings		0	0
Proceeds from line of credit borrowings		0	0
Dividends paid		0	0
Repurchase of common stock, including shares surrendered		0	0
Proceeds from exercise of stock options		0	0
Intercompany borrowings (payments)	23,197	38,899	194,782
Other, net	(10,186)	(8,726)	(22,830)
Net cash used in financing activities	13,011	30,173	171,952
Effects of exchange rate changes on cash	(3,663)	(1,143)	(4,464)
Net increase in cash and cash equivalents, including restricted balances	44,286	554,339	142,111
Cash, cash equivalents and restricted cash, beginning of the year	1,659,332	1,104,993	962,882
Cash, cash equivalents and restricted cash, end of the year	$ 1,703,618	$ 1,659,332	$ 1,104,993