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Short-Term Debt (Narrative) (Details) - USD ($) $ in Billions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Investment Securities And One To Four Family Residential Property Loans |  |
Short-term Debt [Line Items] |  |
Collateral pledged to the FHLB | $ 2.3 | $ 2.1
City National |  |
Short-term Debt [Line Items] |  |
FHLB stock purchased during year | 41,000 |
Unused and available FHLB funds | $ 1.9 | $ 1.9

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- Definition Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22 (b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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