Receivables (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Jan. 31, 2018	Apr. 30, 2017	Jan. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired non-accrual status term, days	60 days
Loans to franchisees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 1.3	$ 0.1	$ 0.1
H&R Block Emerald Advance® lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual status loans	$ 27.8	$ 28.0	$ 25.3