Mortgage Loans Held for Investment and Related Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Apr. 30, 2011	Apr. 30, 2010
Loan loss reserve as a percentage of mortgage loans	16.10%	13.70%
Accrued interest on loans held for investment	$ 2.1	$ 2.6
Loans held for investment	215.2
In-substance foreclosures	7.7	12.5
HRB Bank Interest-only Mortgage [Member]
Percent of loans purchased	62.00%
Loans held for investment	$ 3.7
Minimum Credit Score [Member]
Loan-to-value at origination in order to have internal risk rating of medium	80.00%
Minimum credit score to be given internal risk rating of low	700
Maximum Credit Score [Member]
Loan-to-value at origination in order to have internal risk rating of medium	80.00%
Maximum credit score to be given internal risk rating of medium	700

In-substance foreclosures

Name:	hrb_InSubstanceForeclosures
Namespace Prefix:	hrb
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Loan Loss Reserve To Mortgage Loans

+ Details

Name:	hrb_LoanLossReserveToMortgageLoans
Namespace Prefix:	hrb
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Loans and Receivables Held for Investment Total

+ Details

Name:	hrb_LoansAndReceivablesHeldForInvestmentTotal
Namespace Prefix:	hrb
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loan-to-value at Origination in Order to Have Internal Risk Rating of Medium

+ Details

Name:	hrb_LoanToValueAtOriginationInOrderToHaveInternalRiskRatingOfMedium
Namespace Prefix:	hrb
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum Credit Score to Be Given Internal Risk Rating of Medium

+ Details

Name:	hrb_MaximumCreditScoreToBeGivenInternalRiskRatingOfMedium
Namespace Prefix:	hrb
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum Credit Score To Be Given Internal Risk Rating Of Low

+ Details

Name:	hrb_MinimumCreditScoreToBeGivenInternalRiskRatingOfLow
Namespace Prefix:	hrb
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage
Namespace Prefix:	us-gaap
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 8
-Article 5

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 210.5-02.8)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_InterestReceivable
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant