Receivables (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Document Fiscal Year Focus	2016
Impaired non-accrual status term, days	60 days
Loans to franchisees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans past due	$ 0.3	$ 0.1
Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual status loans	21.1	18.7
Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net	61.2	80.8
Revolving Lines Of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net	35.1	40.3
Cash Back® receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Short-term	$ 1.5	$ 1.3