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Regulatory Capital Requirements (Narrative) (Details) $ in Millions | Sep. 30, 2020 USD ($)
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Our Other Broker-Dealer Subsidiaries |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Ratio of indebtedness to net capital | 15
Stifel Nicolaus [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Aggregate debit balances | 37.80%
Net capital | $ 468.5
Excess of minimum required net capital | 443.7
Stifel Financial Corp. [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Net capital under the alternative method | $ 1.0
Aggregate debit balances | 2.00%

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- Definition Amount of net capital in excess of minimum required net capital, calculated under Alternative Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Minimum amount of net capital of broker-dealer and its subsidiary, calculated under Alternative Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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