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Loans and the Allowance for Credit Losses (Schedule Of Loan Portfolio, Net Of Unearned Income) (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | $ 84,074 | [1] | $ 85,266
Commercial And Industrial [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 42,628 |  | 42,870
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 5,381 |  | 5,405
Commercial Real Estate Construction - Owner-Occupied [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 245 |  | 300
Commercial Investor Real Estate Mortgage [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 5,449 |  | 5,394
Commercial Investor Real Estate Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 1,799 |  | 1,869
Residential First Mortgage [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 17,051 |  | 16,575
Home Equity Line [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 4,057 |  | 4,539
Home Equity Loan [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 2,588 |  | 2,713
Indirect-vehicles [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 621 |  | 934
Indirect-other consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 2,157 |  | 2,431
Consumer Credit Card [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 1,131 |  | 1,213
Other consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 967 |  | 1,023
Commercial Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 48,254 |  | 48,575
Total Investor Real Estate [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | 7,248 |  | 7,263
Consumer Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, net of unearned income | $ 28,572 | [1] | $ 29,428
[1] | These amounts consist of fees that are not allocated at the loan level and loans serviced by third parties wherein Regions does not receive FICO or vintage information.

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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=121593590&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=121611835&loc=d3e5074-111524 + Details
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