Initial principal amount of loans securitized.

No definition available.

Name:	hrb_InitialPrincipalAmountOfLoansSecuritized
Namespace Prefix:	hrb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Loans Sold To Trust, With Claims of Breach of Contract and Indemnity

+ References

No definition available.

+ Details

Name:	hrb_LoansSoldToTrustWithClaimsofBreachofContractandIndemnity
Namespace Prefix:	hrb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Original Principal Amount of Loans Securitized

+ References

No definition available.

+ Details

Name:	hrb_OriginalPrincipalAmountofLoansSecuritized
Namespace Prefix:	hrb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Securitization Transactions

+ References

No definition available.

+ Details

Name:	hrb_SecuritizationTransactions
Namespace Prefix:	hrb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LitigationReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loss contingency liability.

+ References

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=hrb_SccMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=hrb_ClaimswithKnowledgeofOutstandingPrincipalAmountMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=hrb_MGRIDLLCv.MerrillLynchMortgageLendingIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Litigation And Related Contingencies (Details) $ in Millions	35 Months Ended
	Nov. 30, 2007 securities	Oct. 31, 2015 USD ($)	Apr. 30, 2015 USD ($) loan lawsuit	Oct. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual		$ 6.2	$ 8.9	$ 10.3
Securitization Transactions \| securities	38
SCC [Member]
Loss Contingencies [Line Items]
Original Principal Amount of Loans Securitized		14,000.0
SCC [Member] \| Claims with Knowledge of Outstanding Principal Amount [Member]
Loss Contingencies [Line Items]
Initial principal on loans securitized			$ 4,000.0
MGRID LLC v. Merrill Lynch Mortgage Lending Inc [Member]
Loss Contingencies [Line Items]
Number Of Lawsuits \| lawsuit			21
MGRID LLC v. Merrill Lynch Mortgage Lending Inc [Member] \| SCC [Member]
Loss Contingencies [Line Items]
Loans Sold To Trust, With Claims of Breach of Contract and Indemnity \| loan			159
Estimated Litigation Liability		$ 91.0