Regulatory Capital Requirements Of HRB Bank (Narrative) (Details)	Sep. 30, 2013		Mar. 31, 2013		Sep. 30, 2012		Oct. 31, 2013 HRB Bank [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Tier 1 capital ratio (leverage)	40.40%	[1]	25.50%	[1]	36.80%	[1]	41.60%

[1] Tier 1 (core) capital divided by adjusted total assets.