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v3.20.2

Asset Quality (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($) segment | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Number of portfolio segments | segment | 2 |  |
TDRs |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Recorded Investment - Subsequently defaulted TDRs | $ 100 | $ 100 | $ 100
Associated Allowance for TDRs | 133 | 161 | $ 230
Nonperforming | TDRs |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Troubled debt restructurings (TDRs) | 900 | 900 |
Performing |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Troubled debt restructurings (TDRs) | 800 | 1,000 |
Federal Reserve Bank |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Loans pledged as collateral for the ability to borrow | 16,900 | 17,300 |
Federal Home Loan Bank |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Loans pledged as collateral for the ability to borrow | $ 68,000 | $ 63,200 |

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- Definition The sum of the carrying amounts, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and for which the transferees are not permitted to sell or re-pledge them to an unrelated party. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
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