2.4.0.80608 - Disclosure - Contingencies (Details)truefalsefalse1false USDfalsefalse$BalanceAsOf_28Jun2013_Minimum_Memberhttp://www.sec.gov/CIK0000815917instant2013-06-28T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse1false USDtruefalse$BalanceAsOf_28Jun2013_Minimum_Memberhttp://www.sec.gov/CIK0000815917instant2013-06-28T00:00:000001-01-01T00:00:00falsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Minimum [Member]2true 4jnfc_ContingenciesTextualAbstractjnfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Contingencies (Textual) [Abstract]3false 5us-gaap_LossContingencyEstimateOfPossibleLossus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse30003000USD$falsetruefalsexbrli:monetaryItemTypemonetaryReflects the estimated amount of loss from the specified contingency as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 false2Current estimated possible loss4false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2false USDtruefalse$BalanceAsOf_28Jun2013_Maximum_Memberhttp://www.sec.gov/CIK0000815917instant2013-06-28T00:00:000001-01-01T00:00:00falsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Maximum [Member]5true 4jnfc_ContingenciesTextualAbstractjnfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Contingencies (Textual) [Abstract]6false 5us-gaap_LossContingencyEstimateOfPossibleLossus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3500035000USD$falsetruefalsexbrli:monetaryItemTypemonetaryReflects the estimated amount of loss from the specified contingency as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 false2Current estimated possible lossfalseContingencies (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://edwardjones.com/role/ContingenciesDetails16