Receivables (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Document Fiscal Year Focus	2017
Impaired non-accrual status term, days	60 days
Financing Receivable, Allowance for Credit Losses, Recovery	$ 6.8
Loans to franchisees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans past due	0.1	$ 0.0
H&R Block Emerald Advance® lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual status loans	28.0	21.1
Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net	49.5	61.2
Revolving Lines Of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net	27.0	$ 35.1
Instant Cash Back® receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Short-term	$ 1.5