Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Statement of Cash Flows [Abstract]
NET CASH USED IN OPERATING ACTIVITIES	$ (602,713)	$ (627,577)
CASH FLOWS FROM INVESTING ACTIVITIES:
Maturities of and payments received on available-for-sale securities	434,261	49,013
Principal payments on mortgage loans held for investment, net	17,006	13,451
Purchases of property and equipment	(38,779)	(70,927)
Payments made for business acquisitions, net of cash acquired	(61,846)	(94,230)
Franchise loans:
Loans funded	(10,281)	(18,251)
Payments received	17,473	29,637
Other, net	7,246	10,585
Net cash provided by (used in) investing activities	365,080	(80,722)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt	0	(400,000)
Proceeds from issuance of long-term debt	996,831	0
Customer banking deposits, net	(326,705)	(316,269)
Transfer of HRB Bank deposits	(419,028)	0
Dividends paid	(110,338)	(109,871)
Repurchase of common stock, including shares surrendered	(1,517,786)	(10,247)
Proceeds from exercise of stock options	16,875	14,477
Other, net	(37,820)	(23,392)
Net cash used in financing activities	(1,397,971)	(845,302)
Effects of exchange rates on cash	(10,905)	(4,216)
Net decrease in cash and cash equivalents	(1,646,509)	(1,557,817)
Cash and cash equivalents at beginning of the period	2,007,190	2,185,307
Cash and cash equivalents at end of the period	360,681	627,490
SUPPLEMENTARY CASH FLOW DATA:
Income taxes paid, net of refunds received	132,096	157,680
Interest paid on borrowings	15,606	27,379
Transfers of foreclosed loans to other assets	1,450	3,155
Accrued additions to property and equipment	4,573	3,243
Conversion of investment security	$ 0	$ 5,000