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Securities (Narrative) (Details) $ in Millions | Jun. 30, 2021 USD ($) security | Dec. 31, 2020 USD ($) security
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value | $ 9,800 | $ 10,300
Number of individual positions in unrealized loss position | security | 321 | 129
US Treasury Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value | $ 24 | $ 24

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- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 + Details
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- Definition The sum of the fair values, as of the date of each statement of financial position presented, of securities that are restricted as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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