Receivables (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2017	Apr. 30, 2017	Jul. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired non-accrual status term, days	60 days
Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net	$ 25.1	$ 27.0	$ 31.5
Revolving Lines Of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net	52.9	49.5	62.8
Loans to franchisees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	0.9	0.1	2.2
Instant Cash Back® receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Short-term	1.2	1.5	0.6
H&R Block Emerald Advance® lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual status loans	$ 28.1	$ 28.0	$ 21.4