Summary Of Significant Accounting Policies (Details) (USD $)	1 Months Ended	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2012 D Y M	Apr. 30, 2011	Apr. 30, 2010
Summary Of Significant Accounting Policies [Line Items]
Book overdrafts included in accounts payable	$ 33,900,000	$ 33,900,000	$ 34,100,000
Maximum funding by facility	1,700,000,000	1,700,000,000
Commitment period (in months)		2
Period at which loans are classified as non-accrual (in days)		90
Weighted-average life of intangible assets with finite lives (in years)		34
Refundable deposit from franchisees		2,500
Total advertising costs of continuing operations		278,800,000	243,300,000	235,900,000
Proceeds from sale of retail tax offices		17,300,000	65,600,000	65,700,000
Gain on sales of retail tax offices		16,600,000	45,100,000	49,100,000
Contributions of continuing operations to 401(k) defined contribution plans		12,800,000	12,100,000	13,200,000
Expenses related to severance benefits	32,500,000		29,600,000
Net unrealized holding gain on AFS securities	3,600,000	3,600,000	500,000
Foreign currency translation adjustment		8,600,000	10,800,000
Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, minimum (in years)		15
Estimated useful life, maximum (in years)		40
Computers And Other Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, minimum (in years)		3
Estimated useful life, maximum (in years)		5
Leasehold Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, maximum (in years)		8
Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Developed software, amortization period (in months)		36
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Mortgage loan's past due, in days		180
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Mortgage loan's past due, in days		60
Emerald Advance Lines Of Credit [Member]
Summary Of Significant Accounting Policies [Line Items]
Maximum funding by facility	$ 1,000	$ 1,000