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Asset Quality - Post-Modification Outstanding Recorded Investment by Concession Type for Our Commercial Accruing and Nonaccruing TDRs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total commercial and consumer TDRs | $ 73 | $ 186
Total loans | 94,646 | 89,552
Commercial Loans [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Extension of maturity date | 11 | 15
Payment or covenant modification/deferment | 11 | 99
Bankruptcy plan modification | 0 | 6
Increase in new commitment or new money | 8 | 0
Total | 30 | 120
Total loans | 68,032 | 66,310
Consumer Loans [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Interest rate reduction | 14 | 28
Forgiveness of principal | 0 | 0
Other | 29 | 38
Total | 43 | 66
Total loans | $ 26,614 | $ 23,242

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 + Details
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