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Other Noncurrent Assets And Liabilities (Details) (USD $) In Millions, unless otherwise specified | Apr. 30, 2014 | Apr. 30, 2013
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Other Noncurrent Assets And Liabilities [Abstract] |  |
Obligation under deferred compensation plans | $ 38.1 | $ 42.5

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- Details
Name: | hrb_OtherNoncurrentAssetsAndLiabilitiesAbstract
Namespace Prefix: | hrb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer). + References No definition available. + Details
Name: | us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant