Other Noncurrent Assets and Liabilities (Details) (USD $) In Millions	Apr. 30, 2011	Apr. 30, 2010
Other Noncurrent Assets and Liabilities
Obligation under deferred compensation plan	$ 152.7	$ 135.5
Cash surrender value of life insurance and other asset held under trust	$ 115.0	$ 112.4

Name:

hrb_CashSurrenderValueOfLifeInsuranceAndOtherAssetHeldUnderTrust

Namespace Prefix:

hrb

Data Type:

xbrli:monetaryItemType

Balance Type:

debit

Period Type:

instant