Commitments And Contingencies (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended			60 Months Ended
	Jul. 31, 2011	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2013
Commitments And Contingencies [Line Items]
Additional tax assessment limit per client		$ 5,500			$ 5,500
Standard guarantee accrual amount		18,000,000	16,300,000		18,000,000
Contingent business acquisition obligations		11,300,000	6,800,000		11,300,000
Lines of credit, total obligation		90,900,000			90,900,000
Remaining franchise equity lines of credit-undrawn commitment		43,600,000			43,600,000
Standby letter of credit issue limit		6,000,000			6,000,000
Financing Receivables, Line of Credit Facility, Compensating Balances		185,100,000			185,100,000
Industrial Revenue Bonds purchased		31,000,000			31,000,000
Claims received for loans	31,000,000				2,100,000,000
Rent expense		201,000,000	218,300,000	224,900,000
Royalties from franchisees
Commitments And Contingencies [Line Items]
Financing Receivable, Line of Credit Facility, Total Obligation		30,400,000			30,400,000
Financing Receivable, Line of Credit Facility, Remaining Commitment to Fund		$ 5,200,000			$ 5,200,000
Minimum [Member]
Commitments And Contingencies [Line Items]
Term of operating leases, years		3 years
Maximum [Member]
Commitments And Contingencies [Line Items]
Term of operating leases, years		5 years