Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Condensed Consolidated Statements Of Cash Flows [Abstract]
Net cash used in operating activities	$ (567,036)	$ (582,628)
Cash flows from investing activities:
Purchases of AFS securities	(67,474)	(155,159)
Sales, maturities and payments received on available-for-sale securities	53,098	23,249
Principal repayments on mortgage loans held for investment, net	23,608	22,978
Purchases of property and equipment, net	(60,720)	(40,510)
Payments made for acquisitions of businesses and intangibles, net	(10,442)	(8,164)
Proceeds from sales of businesses, net	943	37,036
Franchise loans:
Loans funded	(20,670)	(27,682)
Payments received	8,303	7,447
Other, net	9,275	13,685
Net cash used in investing activities	(64,079)	(127,120)
Cash flows from financing activities:
Repayments of commercial paper		(37,989)
Proceeds from commercial paper		77,979
Repayments of long-term debt	(30,831)
Proceeds from issuance of long-term debt	497,185
Customer banking deposits, net	(37,913)	(129,285)
Dividends paid	(108,428)	(91,446)
Repurchase of common stock, including shares surrendered	(339,919)	(180,222)
Proceeds from exercise of stock options, net	1,288	(430)
Other, net	(33,004)	(28,057)
Net cash used in financing activities	(51,622)	(389,450)
Effects of exchange rates on cash	(696)	(6,035)
Net decrease in cash and cash equivalents	(683,433)	(1,105,233)
Cash and cash equivalents at beginning of the period	1,944,334	1,677,844
Cash and cash equivalents at end of the period	1,260,901	572,611
Supplementary cash flow data:
Income taxes paid, net	48,201	122,832
Interest paid on borrowings	42,106	27,748
Interest paid on deposits	2,683	3,323
Transfers of foreclosed loans to other assets	5,312	4,438
Accrued additions to property and equipment	$ 10,273	$ 10,798