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Regulatory Capital (Narrative) (Details) $ in Billions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Jan. 01, 2020 USD ($) | Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Common equity Tier 1 ("CETI") capital ratio | 0.045% |  | 0.045%
Minimum Tier 1 capital to risk-weighted assets ratio | 0.060 |  | 0.060
Minimum total capital to risk-weighted assets ratio | 0.080 |  | 0.080
Minimum Tier 1 leverage ratio | 0.040 |  | 0.040
CETI capital ratio | 0.065% |  | 0.065%
Tier 1 ratio | 0.080 |  | 0.080
Total risk based capital ratio | 0.10 |  | 0.100
Tier 1 leverage ratio | 0.05% |  |
Capital conservation buffer above required capital ratios in beginning January 1, 2016 | 2.50% |  |
Growth Act [Member] | Minimum [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
CBLR leverage ratio |  | 9.00% |
Growth Act [Member] | Maximum [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
CBLR total consolidated assets |  | $ 10 |

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- Definition The minimum Tier One Common Equity Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
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- Definition The Tier 1 common equity capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References No definition available. + Details
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- Definition Ratio of minimum total risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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