Regions Financial (RF) 10-Q 5 May 21 2021 Q1 Quarterly report Financial data

DOCUMENT AND ENTITY INFORMATION

DOCUMENT AND ENTITY INFORMATION - shares	3 Months Ended
	Mar. 31, 2021	May 03, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-34034
Entity Registrant Name	Regions Financial Corporation
Entity Central Index Key	0001281761
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	63-0589368
Entity Address, Address Line One	1900 Fifth Avenue North
Entity Address, City or Town	Birmingham
Entity Address, State or Province	AL
Entity Address, Postal Zip Code	35203
City Area Code	800
Local Phone Number	734-4667
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		961,285,396
Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $.01 par value
Trading Symbol	RF
Security Exchange Name	NYSE
Series A Preferred Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	6.375% Non-Cumulative Perpetual Preferred Stock, Series A
Trading Symbol	RF PRA
Security Exchange Name	NYSE
Series B Preferred Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	6.375% Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series B
Trading Symbol	RF PRB
Security Exchange Name	NYSE
Series C Preferred Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	5.700% Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C
Trading Symbol	RF PRC
Security Exchange Name	NYSE
Series E Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	4.45% Non-Cumulative Perpetual Preferred Stock, Series E
Trading Symbol	RF PRE
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Mar. 31, 2021		Dec. 31, 2020
Assets
Cash and due from banks	$ 1,918,000,000		$ 1,558,000,000
Interest-bearing deposits in other banks	23,002,000,000		16,398,000,000
Debt securities held to maturity	1,059,000,000		1,122,000,000
Debt securities available for sale	27,092,000,000		27,154,000,000
Loans held for sale	1,487,000,000		1,905,000,000
Loans, net of unearned income	84,755,000,000	[1]	85,266,000,000
Allowance for loan losses	(1,976,000,000)		(2,167,000,000)
Net loans	82,779,000,000		83,099,000,000
Other earning assets	1,262,000,000		1,217,000,000
Premises and equipment, net	1,852,000,000		1,897,000,000
Interest receivable	336,000,000		346,000,000
Goodwill	5,181,000,000		5,190,000,000
Residential mortgage servicing rights at fair value	401,000,000		296,000,000
Other identifiable intangible assets, net	114,000,000		122,000,000
Other assets	6,848,000,000		7,085,000,000
Total assets	153,331,000,000		147,389,000,000
Deposits:
Non-interest-bearing	55,925,000,000		51,289,000,000
Interest-bearing	73,677,000,000		71,190,000,000
Total deposits	129,602,000,000		122,479,000,000
Borrowed funds:
Long-term borrowings	2,916,000,000		3,569,000,000
Total borrowed funds	2,916,000,000		3,569,000,000
Other liabilities	2,951,000,000		3,230,000,000
Total liabilities	135,469,000,000		129,278,000,000
Equity:
Preferred stock	1,656,000,000		1,656,000,000
Common stock	10,000,000		10,000,000
Additional paid-in capital	12,740,000,000		12,731,000,000
Retained earnings	4,235,000,000		3,770,000,000
Treasury stock, at cost	(1,371,000,000)		(1,371,000,000)
Accumulated other comprehensive income, net	592,000,000		1,315,000,000
Total shareholders’ equity	17,862,000,000		18,111,000,000
Total liabilities and equity	$ 153,331,000,000		$ 147,389,000,000
[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.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Debt securities held to maturity	$ 1,131	$ 1,215
Debt Securities, Available-for-sale, Amortized Cost	26,579	26,092
Loans held for sale	$ 1,169	$ 1,446
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Par Value Per Share (in dollars per share)	$ 1	$ 1
Common Stock, Shares Authorized	3,000,000,000	3,000,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares, Issued	1,001,756,659	1,001,507,052

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest and Fee Income, Loans and Leases Held-in-portfolio	$ 854	$ 903
Debt securities	133	158
Interest and Fee Income, Loans & Leases Held for Sale	12	5
Other earning assets	14	13
Interest and Dividend Income, Operating	1,013	1,079
Deposits	19	84
Short-term borrowings	0	8
Long-term borrowings	27	59
Interest Expense	46	151
Interest Income (Expense), Net	967	928
Provision (Credit) for Credit Losses	(142)	373
Interest Income (Expense), after Provision for Loan Loss	1,109	555
Total non-interest income	641	485
Salaries and employee benefits	546	467
Net occupancy expense	77	79
Equipment and software expense	90	83
Other	215	207
Non-interest expense	928	836
Income (Loss) Attributable to Parent, before Tax	822	204
Income tax expense	180	42
Net income	642	162
Net income available to common shareholders	614	139
Interest income on:
Interest and Fee Income, Loans and Leases Held-in-portfolio	854	903
Debt securities	133	158
Interest and Fee Income, Loans & Leases Held for Sale	12	5
Other earning assets	14	13
Total interest income	1,013	1,079
Interest expense on:
Deposits	19	84
Short-term borrowings	0	8
Long-term borrowings	27	59
Total interest expense	46	151
Net interest income	967	928
Provision for (benefit from) credit losses	(142)	373
Net interest income after provision for (benefit from) credit losses	1,109	555
Non-interest expense:
Salaries and employee benefits	546	467
Net occupancy expense	77	79
Equipment and software expense	90	83
Other	215	207
Total non-interest expense	928	836
Income before income taxes	822	204
Income tax expense	180	42
Net income	642	162
Net income available to common shareholders	$ 614	$ 139
Weighted-average number of shares outstanding:
Basic (in shares)	961	957
Diluted (in shares)	968	961
Earnings per common share:
Basic (in dollars per share)	$ 0.64	$ 0.15
Diluted (in dollars per share)	$ 0.63	$ 0.14
Retained Earnings [Member]
Net income	$ 642	$ 162
Non-interest expense:
Net income	642	162
Service charges on deposit accounts
Total non-interest income	157	178
Card and ATM fees
Total non-interest income	115	105
Investment management and trust fee income
Total non-interest income	66	62
Capital markets income
Total non-interest income	100	9
Mortgage income
Total non-interest income	90	68
Securities gains (losses), net
Total non-interest income	1	0
Other
Total non-interest income	$ 112	$ 63

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other comprehensive income, net of tax:
Net income	$ 642	$ 162
Unrealized losses on securities transferred to held to maturity:
Unrealized losses on securities transferred to held to maturity during the period, net of tax	0	0
Less: Reclassification Adjustments for Amortization of Unrealized Losses on Securities Transferred to Held to Maturity, Net of Tax	(2)	(1)
Net change in unrealized losses on securities transferred to held to maturity, net of tax	2	1
Unrealized gains on securities available for sale:
Unrealized holding gains (losses) arising during the period on securities available for sale (net of tax)	(410)	446
Less: reclassification adjustments for securities gains (losses) realized in net income (net of tax)	1	0
Net change in unrealized gains on securities available for sale, net of tax	(411)	446
Unrealized gains on derivative instruments designated as cash flow hedges:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(248)	966
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	76	7
Net change in unrealized gains on derivative instruments, net of tax	(324)	959
Defined benefit pension plans and other post employment benefits:
Net actuarial gains (losses) arising during the period (net of tax)	0	0
Less: reclassification adjustments for amortization of actuarial loss realized in net income (net of tax)	10	8
Net change from defined benefit pension plans and other post employment benefits, net of tax	10	8
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	10	8
Other comprehensive income, net of tax	(723)	1,414
Comprehensive income	(81)	1,576
Retained Earnings [Member]
Other comprehensive income, net of tax:
Net income	$ 642	$ 162

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Unrealized losses on securities transferred to held to maturity during the period, tax	$ 0	$ 0
Amortization of unrealized losses on securities transferred to held to maturity, tax	(1)	0
Unrealized holding gains (losses) on available for sale securities, tax	(138)	151
Reclassification adjustments for securities gains (losses) realized in net income, tax	0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	(83)	325
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	26	2
Net actuarial gains and losses arising during the period, tax	0	0
Reclassification adjustments for amortization of actuarial loss realized in net income, and other, tax	$ (3)	$ (3)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock, At Cost [Member]	Accumulated Other Comprehensive Income (Loss), Net [Member]
Beginning Balance Outstanding (in shares) at Dec. 31, 2019			2	957
Beginning Balance at Dec. 31, 2019	$ 16,295		$ 1,310	$ 10	$ 12,685	$ 3,751		$ (1,371)	$ (90)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	162					162
Other comprehensive income, net of tax	1,414								1,414
Cash dividends declared	(149)					(149)
Preferred stock dividends	(23)					(23)
Impact of stock transaction under compensation plans, net	10				10
Ending Balance Outstanding (in shares) at Mar. 31, 2020			2	957
Ending Balance at Mar. 31, 2020	17,332	$ (377)	$ 1,310	$ 10	12,695	3,364	$ (377)	(1,371)	1,324
Beginning Balance Outstanding (in shares) at Dec. 31, 2020			2	960
Beginning Balance at Dec. 31, 2020	18,111		$ 1,656	$ 10	12,731	3,770		(1,371)	1,315
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	642					642
Other comprehensive income, net of tax	(723)								(723)
Cash dividends declared	(149)					(149)
Preferred stock dividends	(28)					(28)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture				1
Impact of stock transaction under compensation plans, net	9				9
Ending Balance Outstanding (in shares) at Mar. 31, 2021			2	961
Ending Balance at Mar. 31, 2021	$ 17,862		$ 1,656	$ 10	$ 12,740	$ 4,235		$ (1,371)	$ 592

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net income	$ 642	$ 162
Adjustments to reconcile net income to net cash from operating activities:
Provision for credit losses	(142)	373
Depreciation, amortization and accretion, net	101	100
Securities losses, net	(1)	0
Deferred income tax expense (benefit)	92	(69)
Originations and purchases of loans held for sale	(1,716)	(1,034)
Proceeds from sales of loans held for sale	2,131	1,140
(Gain) loss on sale of loans, net	(74)	(33)
Net change in operating assets and liabilities:
Other earning assets	(51)	(212)
Interest receivable and other assets	(96)	41
Other liabilities	(273)	221
Other	106	98
Net cash from operating activities	719	787
Investing activities:
Proceeds from maturities of debt securities held to maturity	63	36
Proceeds from sales of debt securities available for sale	27	31
Proceeds from maturities of debt securities available for sale	1,439	844
Purchases of debt securities available for sale	(2,005)	(1,308)
Net proceeds from (payments for) bank-owned life insurance	0	(1)
Proceeds from sales of loans	120	85
Purchases of loans	(269)	(472)
Purchases of mortgage servicing rights	(11)	(4)
Net change in loans	596	(4,448)
Net purchases of other assets	(27)	(43)
Net cash from investing activities	(67)	(5,280)
Financing activities:
Net change in deposits	7,123	2,555
Net change in short-term borrowings	0	1,100
Proceeds from long-term borrowings	0	3,950
Payments on long-term borrowings	(632)	(1,799)
Cash dividends on common stock	(149)	(149)
Cash dividends on preferred stock	(28)	(23)
Payment, Tax Withholding, Share-based Payment Arrangement	(2)	0
Net cash from financing activities	6,312	5,634
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	6,964	1,141
Cash and cash equivalents at beginning of year	17,956	4,114
Cash and cash equivalents at end of period	$ 24,920	$ 5,255

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	NOTE 1. BASIS OF PRESENTATION Regions Financial Corporation (“Regions” or the "Company”) provides a full range of banking and bank-related services to individual and corporate customers through its subsidiaries and branch offices located across the South, Midwest and Texas. The Company competes with other financial institutions located in the states in which it operates, as well as other adjoining states. Regions is subject to the regulations of certain government agencies and undergoes periodic examinations by certain regulatory authorities. The accounting and reporting policies of Regions and the methods of applying those policies that materially affect the consolidated financial statements conform with GAAP and with general financial services industry practices. The accompanying interim financial statements have been prepared in accordance with the instructions for Form 10-Q and, therefore, do not include all information and notes to the consolidated financial statements necessary for a complete presentation of financial position, results of operations, comprehensive income and cash flows in conformity with GAAP. In the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair presentation of the consolidated financial statements have been included. These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto in Regions’ Annual Report on Form 10-K for the year ended December 31, 2020. Regions has evaluated all subsequent events for potential recognition and disclosure through the filing date of this Form 10-Q.

Securities

Securities	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Securities	NOTE 2. DEBT SECURITIES The amortized cost, gross unrealized gains and losses, and estimated fair value of debt securities held to maturity and debt securities available for sale are as follows: March 31, 2021 Recognized in OCI (1) Not Recognized in OCI Amortized Gross Unrealized Gains Gross Unrealized Losses Carrying Value Gross Gross Estimated (In millions) Debt securities held to maturity: Mortgage-backed securities: Residential agency $ 501 $ — $ (17) $ 484 $ 29 $ — $ 513 Commercial agency 576 — (1) 575 43 — 618 $ 1,077 $ — $ (18) $ 1,059 $ 72 $ — $ 1,131 Debt securities available for sale: U.S. Treasury securities $ 229 $ 4 $ (1) $ 232 $ 232 Federal agency securities 100 1 (3) 98 98 Mortgage-backed securities: Residential agency 18,563 458 (175) 18,846 18,846 Residential non-agency 1 — — 1 1 Commercial agency 6,038 219 (58) 6,199 6,199 Commercial non-agency 558 12 — 570 570 Corporate and other debt securities 1,090 56 — 1,146 1,146 $ 26,579 $ 750 $ (237) $ 27,092 $ 27,092 December 31, 2020 Recognized in OCI (1) Not Recognized in OCI Amortized Gross Unrealized Gains Gross Unrealized Losses Carrying Value Gross Gross Estimated (In millions) Debt securities held to maturity: Mortgage-backed securities: Residential agency $ 554 $ — $ (19) $ 535 $ 34 $ — $ 569 Commercial agency 589 — (2) 587 59 — 646 $ 1,143 $ — $ (21) $ 1,122 $ 93 $ — $ 1,215 Debt securities available for sale: U.S. Treasury securities $ 178 $ 5 $ — $ 183 $ 183 Federal agency securities 102 3 — 105 105 Mortgage-backed securities: Residential agency 18,455 625 (4) 19,076 19,076 Residential non-agency 1 — — 1 1 Commercial agency 5,659 346 (6) 5,999 5,999 Commercial non-agency 571 15 — 586 586 Corporate and other debt securities 1,126 78 — 1,204 1,204 $ 26,092 $ 1,072 $ (10) $ 27,154 $ 27,154 _________ (1) The gross unrealized losses recognized in OCI on securities held to maturity resulted from a transfer of securities available for sale to held to maturity in the second quarter of 2013. Debt securities with carrying values of $9.5 billion and $10.3 billion at March 31, 2021, and December 31, 2020, respectively, were pledged to secure public funds, trust deposits and certain borrowing arrangements. Included within total pledged securities is approximately $24 million of encumbered U.S. Treasury securities at both March 31, 2021, and December 31, 2020. The amortized cost and estimated fair value of debt securities held to maturity and debt securities available for sale at March 31, 2021, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Estimated (In millions) Debt securities held to maturity: Mortgage-backed securities: Residential agency $ 501 $ 513 Commercial agency 576 618 $ 1,077 $ 1,131 Debt securities available for sale: Due in one year or less $ 268 $ 271 Due after one year through five years 756 793 Due after five years through ten years 285 303 Due after ten years 110 109 Mortgage-backed securities: Residential agency 18,563 18,846 Residential non-agency 1 1 Commercial agency 6,038 6,199 Commercial non-agency 558 570 $ 26,579 $ 27,092 The following tables present gross unrealized losses and the related estimated fair value of debt securities held to maturity and debt securities available for sale at March 31, 2021, and December 31, 2020. For debt securities transferred to held to maturity from available for sale, the analysis in the tables below is comparing the securities' original amortized cost to its current estimated fair value. These securities are segregated between investments that have been in a continuous unrealized loss position for less than twelve months and for twelve months or more. March 31, 2021 Less Than Twelve Months Twelve Months or More Total Estimated Gross Estimated Gross Estimated Gross (In millions) Debt securities available for sale: U.S. Treasury securities $ 62 $ (1) $ 2 $ — $ 64 $ (1) Federal agency securities 62 (3) — — 62 (3) Mortgage-backed securities: Residential agency $ 7,100 $ (175) $ 21 $ — $ 7,121 $ (175) Commercial agency 1,644 (58) 19 — 1,663 (58) $ 8,868 $ (237) $ 42 $ — $ 8,910 $ (237) December 31, 2020 Less Than Twelve Months Twelve Months or More Total Estimated Gross Estimated Gross Estimated Gross (In millions) Debt securities available for sale: Mortgage-backed securities: Residential agency $ 914 $ (4) $ 101 $ — $ 1,015 $ (4) Commercial agency 819 (6) — — 819 (6) $ 1,733 $ (10) $ 101 $ — $ 1,834 $ (10) The number of individual debt positions in an unrealized loss position in the tables above increased from 129 at December 31, 2020, to 254 at March 31, 2021. The increase in the number of securities and the total amount of unrealized losses from year-end 2020 was primarily due to changes in market interest rates. In instances where an unrealized loss existed, there was no indication of an adverse change in credit on the underlying positions in the tables above. As it relates to these positions, management believes no individual unrealized loss, other than those discussed below, represented credit impairment as of those dates. The Company does not intend to sell, and it is not more likely than not that the Company will be required to sell, the positions before the recovery of their amortized cost basis, which may be at maturity. Gross realized gains and gross realized losses on sales of debt securities available for sale were immaterial for the three months ended March 31, 2021 and 2020. The cost of securities sold is based on the specific identification method. As part of the Company's normal process for evaluating impairment, management did not identify any positions where impairment was believed to exist in either of the three months ended March 31, 2021or 2020.

Loans and the Allowance for Cre

Loans and the Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Loans and the Allowance for Credit Losses	NOTE 3. LOANS AND THE ALLOWANCE FOR CREDIT LOSSES LOANS The following table presents the distribution of Regions' loan portfolio by segment and class, net of unearned income: March 31, 2021 December 31, 2020 (In millions) Commercial and industrial $ 43,241 $ 42,870 Commercial real estate mortgage—owner-occupied 5,335 5,405 Commercial real estate construction—owner-occupied 293 300 Total commercial 48,869 48,575 Commercial investor real estate mortgage 5,405 5,394 Commercial investor real estate construction 1,817 1,869 Total investor real estate 7,222 7,263 Residential first mortgage 16,643 16,575 Home equity lines 4,286 4,539 Home equity loans 2,631 2,713 Indirect—vehicles 768 934 Indirect—other consumer 2,262 2,431 Consumer credit card 1,111 1,213 Other consumer 963 1,023 Total consumer 28,664 29,428 Total loans, net of unearned income $ 84,755 $ 85,266 During the three months ended March 31, 2021 and 2020, Regions purchased approximately $261 million and $470 million in indirect-other consumer, residential first mortgage and commercial and industrial loans from third parties, respectively. Regions ceased originating new indirect auto loans in the first quarter of 2019. The Company remains in the direct auto lending business. At March 31, 2021, $19.6 billion in securities and net eligible loans held by Regions were pledged for potential borrowings from the FHLB. At March 31, 2021, an additional $17.7 billion in net eligible loans held by Regions were pledged to the FRB for potential borrowings. Included in the commercial and industrial loan balance are sales-type and direct financing leases totaling $1.2 billion as of March 31, 2021, with related income of $16 million for the three months ended March 31, 2021. ALLOWANCE FOR CREDIT LOSSES Regions determines the appropriate level of the allowance on a quarterly basis. Refer to Note 1 "Summary of Significant Accounting Policies" to the consolidated financial statements to the Annual Report on Form 10-K for the year ended December 31, 2020, for a description of the methodology. As of March 31, 2021, Regions' total loans included $4.3 billion of PPP loans. These loans are guaranteed by the Federal government and as the guarantee is not separable from the loans, Regions recorded an immaterial allowance on these loans. ROLLFORWARD OF ALLOWANCE FOR CREDIT LOSSES During the three months ended March 31, 2021, Regions decreased the allowance by $225 million to $2.1 billion, which represents management's best estimate of expected losses over the life of the portfolio. The decrease was due primarily to improving credit metrics, improvement in macroeconomic conditions and recent government stimulus programs. Macroeconomic factors utilized in the CECL loss models include, but are not limited to, unemployment rate, GDP, HPI and the S&P 500 index, with unemployment being the most significant macroeconomic factor. Regions' models are sensitive to changes in the economic scenarios. While the March 31, 2021 economic forecast includes a degree of uncertainty around how long the COVID-19 pandemic will persist, the forecast continues to exhibit improvement in the economic outlook. Risks to the economic forecast and the model limitations are considered through model adjustments and the qualitative framework. The following tables present analyses of the allowance by portfolio segment for the three months ended March 31, 2021 and 2020. Three Months Ended March 31, 2021 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, January 1, 2021 $ 1,196 $ 183 $ 788 $ 2,167 Provision for (benefit from) loan losses (83) (18) (7) (108) Loan losses: Charge-offs (47) (15) (52) (114) Recoveries 16 — 15 31 Net loan (losses) recoveries (31) (15) (37) (83) Allowance for loan losses, March 31, 2021 1,082 150 744 1,976 Reserve for unfunded credit commitments, January 1, 2021 97 14 15 126 Provision for (benefit from) unfunded credit losses (30) (3) (1) (34) Reserve for unfunded credit commitments, March 31, 2021 67 11 14 92 Allowance for credit losses, March 31, 2021 $ 1,149 $ 161 $ 758 $ 2,068 Three Months Ended March 31, 2020 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, December 31, 2019 $ 537 $ 45 $ 287 $ 869 Cumulative change in accounting guidance (3) 7 434 438 Allowance for loan losses, January 1, 2020 (adjusted for change in accounting guidance) 534 52 721 1,307 Provision for loan losses 251 10 115 376 Loan losses: Charge-offs (71) — (73) (144) Recoveries 7 1 13 21 Net loan (losses) recoveries (64) 1 (60) (123) Allowance for loan losses, March 30, 2020 721 63 776 1,560 Reserve for unfunded credit commitments, December 31, 2019 41 4 — 45 Cumulative change in accounting guidance 36 13 14 63 Reserve for unfunded credit commitments, January 1, 2020 (adjusted for change in accounting guidance) 77 17 14 108 Provision for (benefit from) unfunded credit losses (4) 1 — (3) Reserve for unfunded credit commitments, March 30, 2020 73 18 14 105 Allowance for credit losses, March 31, 2020 $ 794 $ 81 $ 790 $ 1,665 PORTFOLIO SEGMENT RISK FACTORS Regions’ portfolio segments are commercial, investor real estate and consumer. Classes within each segment present unique credit risks. Refer to Note 6 "Allowance for Credit Losses" in the Annual Report on Form 10-K for the year ended December 31, 2020 for information regarding Regions’ portfolio segments and related classes, as well as the risks specific to each. CREDIT QUALITY INDICATORS The commercial and investor real estate portfolio segments’ primary credit quality indicator is internal risk ratings which are detailed by categories related to underlying credit quality and probability of default. Regions assigns these risk ratings at loan origination and reviews the relationship utilizing a risk-based approach on, at minimum, an annual basis or at any time management becomes aware of information affecting the borrowers' ability to fulfill their obligations. Both quantitative and qualitative factors are considered in this review process. Regions' ratings are aligned to federal banking regulators’ definitions and are utilized to develop the associated allowance for credit losses. Refer to Note 6 "Allowance for Credit Losses" in the Annual Report on Form 10-K for the year ended December 31, 2020 for information regarding commercial risk ratings. Regions' consumer portfolio segment has various classes that present unique credit risks. Regions considers factors such as periodic updates of FICO scores, accrual status, days past due status, unemployment rates, home prices and geography as credit quality indicators for the consumer loan portfolio. FICO scores are obtained at origination as part of Regions' formal underwriting process. Refreshed FICO scores are obtained by the Company quarterly for all consumer loans, including residential first mortgage loans. Current FICO data is not available for certain loans in the portfolio for various reasons; for example, if customers do not use sufficient credit, an updated score may not be available. These categories are utilized to develop the associated allowance for credit losses. The higher the FICO score the less probability of default and vice versa. The following tables present applicable credit quality indicators for the loan portfolio segments and classes, excluding loans held for sale, by vintage year as of March 31, 2021 and December 31, 2020. Classes in the commercial and investor real estate portfolio segments are disclosed by risk rating. Classes in the consumer portfolio segment are disclosed by current FICO scores. Refer to Note 6 "Allowance for Credit Losses" in the Annual Report on Form 10-K for the year ended December 31, 2020 for more information regarding Regions' credit quality indicators. March 31, 2021 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2021 2020 2019 2018 2017 Prior (In millions) Commercial and industrial: Risk Rating: Pass (2) $ 3,755 $ 10,495 $ 5,656 $ 3,182 $ 2,242 $ 3,367 $ 12,048 $ — $ (91) $ 40,654 Special Mention 6 91 252 302 $ 44 $ 54 560 — — 1,309 Substandard Accrual 16 39 80 118 $ 54 $ 8 537 — — 852 Non-accrual 18 36 57 91 $ 20 $ 33 171 — — 426 Total commercial and industrial $ 3,795 $ 10,661 $ 6,045 $ 3,693 $ 2,360 $ 3,462 $ 13,316 $ — $ (91) $ 43,241 Commercial real estate mortgage—owner-occupied: Risk Rating: Pass $ 312 $ 1,315 $ 841 $ 844 $ 512 $ 1,060 $ 137 $ — $ (4) $ 5,017 Special Mention 3 24 25 17 18 47 1 — — 135 Substandard Accrual — 4 45 12 12 16 1 — — 90 Non-accrual — 11 23 17 22 15 5 — — 93 Total commercial real estate mortgage—owner-occupied: $ 315 $ 1,354 $ 934 $ 890 $ 564 $ 1,138 $ 144 $ — $ (4) $ 5,335 Commercial real estate construction—owner-occupied: Risk Rating: Pass $ 3 $ 74 $ 63 $ 37 $ 23 $ 58 $ 8 $ — $ — $ 266 Special Mention — — — — 2 2 — — — 4 Substandard Accrual — 1 3 1 2 7 — — — 14 Non-accrual — — — — 1 8 — — — 9 Total commercial real estate construction—owner-occupied: $ 3 $ 75 $ 66 $ 38 $ 28 $ 75 $ 8 $ — $ — $ 293 Total commercial $ 4,113 $ 12,090 $ 7,045 $ 4,621 $ 2,952 $ 4,675 $ 13,468 $ — $ (95) $ 48,869 Commercial investor real estate mortgage: Risk Rating: Pass $ 396 $ 1,375 $ 1,168 $ 995 $ 245 $ 161 $ 315 $ — $ (6) $ 4,649 Special Mention 55 61 179 38 15 11 — — — 359 Substandard Accrual — 71 160 57 — 9 — — — 297 Non-accrual — — 38 — — 3 59 — — 100 Total commercial investor real estate mortgage $ 451 $ 1,507 $ 1,545 $ 1,090 $ 260 $ 184 $ 374 $ — $ (6) $ 5,405 March 31, 2021 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2021 2020 2019 2018 2017 Prior (In millions) Commercial investor real estate construction: Risk Rating: Pass $ 43 $ 253 $ 590 $ 191 $ 1 $ 2 $ 680 $ — $ (11) $ 1,749 Special Mention — — 32 32 — — 3 — — 67 Substandard Accrual — 1 — — — — — — — 1 Non-accrual — — — — — — — — — — Total commercial investor real estate construction $ 43 $ 254 $ 622 $ 223 $ 1 $ 2 $ 683 $ — $ (11) $ 1,817 Total investor real estate $ 494 $ 1,761 $ 2,167 $ 1,313 $ 261 $ 186 $ 1,057 $ — $ (17) $ 7,222 Residential first mortgage: FICO scores Above 720 $ 902 $ 5,602 $ 1,554 $ 695 $ 886 $ 3,558 $ — $ — $ — $ 13,197 681-720 118 475 155 90 91 453 — — — 1,382 620-680 45 200 103 65 67 445 — — — 925 Below 620 7 39 47 52 51 539 — — — 735 Data not available 14 56 24 10 14 135 9 — 142 404 Total residential first mortgage $ 1,086 $ 6,372 $ 1,883 $ 912 $ 1,109 $ 5,130 $ 9 $ — $ 142 $ 16,643 Home equity lines: FICO scores Above 720 $ — $ — $ — $ — $ — $ — $ 3,152 $ 46 $ — $ 3,198 681-720 — — — — — — 452 10 — 462 620-680 — — — — — — 297 12 — 309 Below 620 — — — — — — 173 8 — 181 Data not available — — — — — — 104 3 29 136 Total home equity lines $ — $ — $ — $ — $ — $ — $ 4,178 $ 79 $ 29 $ 4,286 Home equity loans FICO scores Above 720 $ 129 $ 406 $ 223 $ 205 $ 290 $ 804 $ — $ — $ — $ 2,057 681-720 20 48 35 30 36 102 — — — 271 620-680 7 19 16 16 21 82 — — — 161 Below 620 — 2 7 8 13 61 — — — 91 Data not available — 1 2 3 4 21 — — 20 51 Total home equity loans $ 156 $ 476 $ 283 $ 262 $ 364 $ 1,070 $ — $ — $ 20 $ 2,631 Indirect—vehicles: FICO scores Above 720 $ — $ — $ 16 $ 264 $ 114 $ 95 $ — $ — $ — $ 489 681-720 — — 4 43 19 17 — — — 83 620-680 — — 3 38 19 20 — — — 80 Below 620 — — 3 36 22 27 — — — 88 Data not available — — — 3 5 6 — — 14 28 Total indirect- vehicles $ — $ — $ 26 $ 384 $ 179 $ 165 $ — $ — $ 14 $ 768 March 31, 2021 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2021 2020 2019 2018 2017 Prior (In millions) Indirect—other consumer: FICO scores Above 720 $ — $ 365 $ 609 $ 345 $ 124 $ 80 $ — $ — $ — $ 1,523 681-720 — 53 151 99 37 23 — — — 363 620-680 — 12 64 55 23 15 — — — 169 Below 620 — 2 18 18 7 6 — — — 51 Data not available — 17 3 3 2 1 — — 130 156 Total indirect- other consumer $ — $ 449 $ 845 $ 520 $ 193 $ 125 $ — $ — $ 130 $ 2,262 Consumer credit card: FICO scores Above 720 $ — $ — $ — $ — $ — $ — $ 609 $ — $ — $ 609 681-720 — — — — — — 237 — — 237 620-680 — — — — — — 192 — — 192 Below 620 — — — — — — 79 — — 79 Data not available — — — — — — 8 — (14) (6) Total consumer credit card $ — $ — $ — $ — $ — $ — $ 1,125 $ — $ (14) $ 1,111 Other consumer: FICO scores Above 720 $ 56 $ 183 $ 136 $ 67 $ 22 $ 7 $ 110 $ — $ — $ 581 681-720 17 49 36 15 4 2 52 — — 175 620-680 11 30 22 9 3 1 38 — — 114 Below 620 2 9 9 5 1 1 17 — — 44 Data not available 43 1 — — — — 3 — 2 49 Total other consumer $ 129 $ 272 $ 203 $ 96 $ 30 $ 11 $ 220 $ — $ 2 $ 963 Total consumer loans $ 1,371 $ 7,569 $ 3,240 $ 2,174 $ 1,875 $ 6,501 $ 5,532 $ 79 $ 323 $ 28,664 Total Loans $ 5,978 $ 21,420 $ 12,452 $ 8,108 $ 5,088 $ 11,362 $ 20,057 $ 79 $ 211 $ 84,755 December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2020 2019 2018 2017 2016 Prior (In millions) Commercial and industrial: Risk Rating: Pass (2) $ 12,260 $ 6,115 $ 3,550 $ 2,413 $ 1,166 $ 2,493 $ 12,138 $ — $ (39) $ 40,096 Special Mention 133 250 376 84 5 48 722 — — 1,618 Substandard Accrual 41 50 78 55 20 4 490 — — 738 Non-accrual 42 59 97 20 23 19 158 — — 418 Total commercial and industrial $ 12,476 $ 6,474 $ 4,101 $ 2,572 $ 1,214 $ 2,564 $ 13,508 $ — $ (39) $ 42,870 December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2020 2019 2018 2017 2016 Prior (In millions) Commercial real estate mortgage—owner-occupied: Risk Rating: Pass $ 1,379 $ 882 $ 913 $ 547 $ 401 $ 801 $ 140 $ — $ (3) $ 5,060 Special Mention 18 31 23 22 10 44 6 — — 154 Substandard Accrual 3 38 16 16 4 15 2 — — 94 Non-accrual 14 23 19 21 6 14 — — — 97 Total commercial real estate mortgage—owner-occupied: $ 1,414 $ 974 $ 971 $ 606 $ 421 $ 874 $ 148 $ — $ (3) $ 5,405 Commercial real estate construction—owner-occupied: Risk Rating: Pass $ 61 $ 75 $ 39 $ 24 $ 24 $ 40 $ 9 $ — $ — $ 272 Special Mention 1 — — 2 2 — — — — 5 Substandard Accrual — 3 1 3 4 3 — — — 14 Non-accrual — — — 1 — 8 — — — 9 Total commercial real estate construction—owner-occupied: $ 62 $ 78 $ 40 $ 30 $ 30 $ 51 $ 9 $ — $ — $ 300 Total commercial $ 13,952 $ 7,526 $ 5,112 $ 3,208 $ 1,665 $ 3,489 $ 13,665 $ — $ (42) $ 48,575 Commercial investor real estate mortgage: Risk Rating: Pass $ 1,663 $ 1,243 $ 1,137 $ 252 $ 65 $ 162 $ 332 $ — $ (5) $ 4,849 Special Mention 5 77 76 15 — 7 — — — 180 Substandard Accrual 69 114 57 — 2 9 — — — 251 Non-accrual — 44 1 — — 1 68 — — 114 Total commercial investor real estate mortgage $ 1,737 $ 1,478 $ 1,271 $ 267 $ 67 $ 179 $ 400 $ — $ (5) $ 5,394 Commercial investor real estate construction: Risk Rating: Pass $ 224 $ 601 $ 266 $ 1 $ — $ 1 $ 679 $ — $ (11) $ 1,761 Special Mention 30 36 31 — — — 9 — — 106 Substandard Accrual 1 1 — — — — — — — 2 Non-accrual — — — — — — — — — — Total commercial investor real estate construction $ 255 $ 638 $ 297 $ 1 $ — $ 1 $ 688 $ — $ (11) $ 1,869 Total investor real estate $ 1,992 $ 2,116 $ 1,568 $ 268 $ 67 $ 180 $ 1,088 $ — $ (16) $ 7,263 Residential first mortgage: FICO scores Above 720 $ 5,564 $ 1,738 $ 809 $ 1,023 $ 1,279 $ 2,709 $ — $ — $ — $ 13,122 681-720 525 189 103 112 113 360 — — — 1,402 620-680 211 100 73 64 67 404 — — — 919 Below 620 31 44 50 51 60 499 — — — 735 Data not available 52 23 13 16 15 126 10 — 142 397 Total residential first mortgage $ 6,383 $ 2,094 $ 1,048 $ 1,266 $ 1,534 $ 4,098 $ 10 $ — $ 142 $ 16,575 December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2020 2019 2018 2017 2016 Prior (In millions) Home equity lines: FICO scores Above 720 $ — $ — $ — $ — $ — $ — $ 3,334 $ 45 $ — $ 3,379 681-720 — — — — — — 492 10 — 502 620-680 — — — — — — 319 11 — 330 Below 620 — — — — — — 181 7 — 188 Data not available — — — — — — 107 3 30 140 Total home equity lines $ — $ — $ — $ — $ — $ — $ 4,433 $ 76 $ 30 $ 4,539 Home equity loans FICO scores Above 720 $ 417 $ 251 $ 233 $ 325 $ 304 $ 580 $ — $ — $ — $ 2,110 681-720 57 40 35 39 37 76 — — — 284 620-680 21 17 19 22 25 65 — — — 169 Below 620 2 7 9 13 15 52 — — — 98 Data not available 1 2 2 4 5 17 — — 21 52 Total home equity loans $ 498 $ 317 $ 298 $ 403 $ 386 $ 790 $ — $ — $ 21 $ 2,713 Indirect—vehicles: FICO scores Above 720 $ — $ 18 $ 305 $ 137 $ 92 $ 40 $ — $ — $ — $ 592 681-720 — 5 50 22 16 8 — — — 101 620-680 — 4 44 23 18 8 — — — 97 Below 620 — 3 42 26 24 14 — — — 109 Data not available — — 4 6 4 4 — — 17 35 Total indirect- vehicles $ — $ 30 $ 445 $ 214 $ 154 $ 74 $ — $ — $ 17 $ 934 Indirect—other consumer: FICO scores Above 720 $ 297 $ 721 $ 392 $ 138 $ 60 $ 31 $ — $ — $ — $ 1,639 681-720 39 173 116 41 18 9 — — — 396 620-680 9 73 63 27 12 6 — — — 190 Below 620 1 22 22 9 5 2 — — — 61 Data not available — 3 3 2 1 1 — — 135 145 Total indirect- other consumer $ 346 $ 992 $ 596 $ 217 $ 96 $ 49 $ — $ — $ 135 $ 2,431 Consumer credit card: FICO scores Above 720 $ — $ — $ — $ — $ — $ — $ 667 $ — $ — $ 667 681-720 — — — — — — 255 — — 255 620-680 — — — — — — 208 — — 208 Below 620 — — — — — — 91 — — 91 Data not available — — — — — — 7 — (15) (8) Total consumer credit card $ — $ — $ — $ — $ — $ — $ 1,228 $ — $ (15) $ 1,213 December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2020 2019 2018 2017 2016 Prior (In millions) Other consumer: FICO scores Above 720 $ 209 $ 163 $ 84 $ 30 $ 7 $ 3 $ 117 $ — $ — $ 613 681-720 61 44 20 5 1 1 52 — — 184 620-680 34 28 13 4 1 1 42 — — 123 Below 620 11 11 6 3 1 — 19 — — 51 Data not available 46 1 — — — — 3 — 2 52 Total other consumer $ 361 $ 247 $ 123 $ 42 $ 10 $ 5 $ 233 $ — $ 2 $ 1,023 Total consumer loans $ 7,588 $ 3,680 $ 2,510 $ 2,142 $ 2,180 $ 5,016 $ 5,904 $ 76 $ 332 $ 29,428 Total Loans $ 23,532 $ 13,322 $ 9,190 $ 5,618 $ 3,912 $ 8,685 $ 20,657 $ 76 $ 274 $ 85,266 _________ (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. (2) Commercial and Industrial lending includes PPP lending in the 2020 and 2021 vintage years. AGING AND NON-ACCRUAL ANALYSIS The following tables include an aging analysis of DPD and loans on non-accrual status for each portfolio segment and class as of March 31, 2021 and December 31, 2020. Loans on non-accrual status with no related allowance included $105 million and $112 million of commercial and industrial loans as of March 31, 2021 and December 31, 2020, respectively. Non–accrual loans with no related allowance typically include loans where the underlying collateral is deemed sufficient to recover all remaining principal. Loans that have been fully charged-off do not appear in the tables below. March 31, 2021 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total Total Non-accrual Total (In millions) Commercial and industrial $ 27 $ 15 $ 8 $ 50 $ 42,815 $ 426 $ 43,241 Commercial real estate mortgage—owner-occupied 7 2 1 10 5,242 93 5,335 Commercial real estate construction—owner-occupied 1 — — 1 284 9 293 Total commercial 35 17 9 61 48,341 528 48,869 Commercial investor real estate mortgage 1 1 — 2 5,305 100 5,405 Commercial investor real estate construction 1 — — 1 1,817 — 1,817 Total investor real estate 2 1 — 3 7,122 100 7,222 Residential first mortgage 82 38 138 258 16,590 53 16,643 Home equity lines 14 8 19 41 4,238 48 4,286 Home equity loans 9 3 14 26 2,622 9 2,631 Indirect—vehicles 9 2 3 14 768 — 768 Indirect—other consumer 7 7 4 18 2,262 — 2,262 Consumer credit card 7 5 14 26 1,111 — 1,111 Other consumer 7 3 4 14 963 — 963 Total consumer 135 66 196 397 28,554 110 28,664 $ 172 $ 84 $ 205 $ 461 $ 84,017 $ 738 $ 84,755 December 31, 2020 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total Total Non-accrual Total (In millions) Commercial and industrial $ 37 $ 22 $ 7 $ 66 $ 42,452 $ 418 $ 42,870 Commercial real estate mortgage—owner-occupied 4 1 1 6 5,308 97 5,405 Commercial real estate construction—owner-occupied 1 — — 1 291 9 300 Total commercial 42 23 8 73 48,051 524 48,575 Commercial investor real estate mortgage 3 — — 3 5,280 114 5,394 Commercial investor real estate construction — — — — 1,869 — 1,869 Total investor real estate 3 — — 3 7,149 114 7,263 Residential first mortgage 104 41 156 301 16,522 53 16,575 Home equity lines 24 11 19 54 4,493 46 4,539 Home equity loans 10 7 13 30 2,705 8 2,713 Indirect—vehicles 15 4 4 23 934 — 934 Indirect—other consumer 12 8 5 25 2,431 — 2,431 Consumer credit card 8 6 14 28 1,213 — 1,213 Other consumer 12 3 2 17 1,023 — 1,023 Total consumer 185 80 213 478 29,321 107 29,428 $ 230 $ 103 $ 221 $ 554 $ 84,521 $ 745 $ 85,266 TROUBLED DEBT RESTRUCTURINGS Regions regularly modifies commercial and investor real estate loans in order to facilitate a workout strategy. Similarly, Regions works to meet the individual needs of consumer borrowers to stem foreclosure through its CAP. Refer to Note 1 "Summary of Significant Accounting Policies" and Note 6 "Allowance for Credit Losses" in the Annual Report on Form 10-K for the year ended December 31, 2020 for additional information regarding the Company's TDRs,including their impact on the allowance and designation of TDRs in periods subsequent to the modification. As provided in the Consolidated Appropriations Act passed into law on December 27, 2020, which extended initial guidance provided in the CARES Act, certain loan modifications related to the COVID-19 pandemic beginning March 1, 2020 through the earlier of 60 days after the end of the pandemic or January 1, 2022 are eligible for relief from TDR classification. Regions elected this provision; therefore, modified loans that met the required guidelines for relief are not considered TDRs and are excluded from the disclosures below. The Consolidated Appropriations Act relief and short-term nature of most COVID-19 deferrals precluded the majority of Regions' COVID-19 loan modifications from being classified as TDRs as of March 31, 2021 and December 31, 2020. The following tables present the end of period balance for loans modified in a TDR during the periods presented by portfolio segment and class, and the financial impact of those modifications. The tables include modifications made to new TDRs, as well as renewals of existing TDRs. Three Months Ended March 31, 2021 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 26 $ 30 $ — Commercial real estate mortgage—owner-occupied 6 1 — Commercial real estate construction—owner-occupied — — — Total commercial 32 31 — Commercial investor real estate mortgage 2 7 — Commercial investor real estate construction — — — Total investor real estate 2 7 — Residential first mortgage 175 35 3 Home equity lines 2 — — Home equity loans 1 — — Consumer credit card — — — Indirect—vehicles and other consumer 48 1 — Total consumer 226 36 3 260 $ 74 $ 3 Three Months Ended March 31, 2020 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 26 $ 74 $ — Commercial real estate mortgage—owner-occupied 5 2 — Commercial real estate construction—owner-occupied 1 1 — Total commercial 32 77 — Commercial investor real estate mortgage 4 1 — Commercial investor real estate construction 1 — — Total investor real estate 5 1 — Residential first mortgage 52 7 1 Home equity lines — — — Home equity loans 15 1 — Consumer credit card 10 — — Indirect—vehicles and other consumer 10 — — Total consumer 87 8 1 124 $ 86 $ 1

Servicing of Financial Assets

Servicing of Financial Assets	3 Months Ended
	Mar. 31, 2021
Transfers and Servicing of Financial Assets [Abstract]
Servicing of Financial Assets	NOTE 4. SERVICING OF FINANCIAL ASSETS RESIDENTIAL MORTGAGE BANKING ACTIVITIES The fair value of residential MSRs is calculated using various assumptions including future cash flows, market discount rates, expected prepayment rates, servicing costs and other factors. A significant change in prepayments of mortgages in the servicing portfolio could result in significant changes in the valuation adjustments, thus creating potential volatility in the carrying amount of residential MSRs. The Company compares fair value estimates and assumptions to observable market data where available, and also considers recent market activity and actual portfolio experience. The table below presents an analysis of residential MSRs under the fair value measurement method: Three Months Ended March 31 2021 2020 (In millions) Carrying value, beginning of period $ 296 $ 345 Additions 32 11 Increase (decrease) in fair value: Due to change in valuation inputs or assumptions 90 (83) Economic amortization associated with borrower repayments (1) (17) (19) Carrying value, end of period $ 401 $ 254 ________ (1) "Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns. Regions' MSR decay methodology is a discounted net cash flow approach. In the first quarter of 2021 and 2020, the Company purchased the rights to service residential mortgage loans on a flow basis for approximately $11 million and $4 million, respectively. Data and assumptions used in the fair value calculation, as well as the valuation’s sensitivity to rate fluctuations, related to residential MSRs (excluding related derivative instruments) are as follows: March 31 2021 2020 (Dollars in millions) Unpaid principal balance $ 34,212 $ 33,787 Weighted-average CPR (%) 10.2 % 18.1 % Estimated impact on fair value of a 10% increase $ (28) $ (26) Estimated impact on fair value of a 20% increase $ (51) $ (49) Option-adjusted spread (basis points) 564 629 Estimated impact on fair value of a 10% increase $ (10) $ (5) Estimated impact on fair value of a 20% increase $ (21) $ (10) Weighted-average coupon interest rate 3.8 % 4.2 % Weighted-average remaining maturity (months) 289 278 Weighted-average servicing fee (basis points) 27.5 27.4 The sensitivity calculations above are hypothetical and should not be considered to be predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the change in assumption to the change in fair value may not be linear. Also, the effect of an adverse variation in a particular assumption on the fair value of the residential MSRs is calculated without changing any other assumption, while in reality changes in one factor may result in changes in another, which may either magnify or counteract the effect of the change. The derivative instruments utilized by Regions would serve to reduce the estimated impacts to fair value included in the table above. The following table presents servicing related fees, which includes contractually specified servicing fees, late fees and other ancillary income resulting from the servicing of residential mortgage loans: Three Months Ended March 31 2021 2020 (In millions) Servicing related fees and other ancillary income $ 24 $ 25 Residential mortgage loans are sold in the secondary market with standard representations and warranties regarding certain characteristics such as the quality of the loan, the absence of fraud, the eligibility of the loan for sale and the future servicing associated with the loan. Regions may be required to repurchase these loans at par, or make-whole or indemnify the purchasers for losses incurred when representations and warranties are breached. Regions maintains an immaterial repurchase liability related to residential mortgage loans sold with representations and warranty provisions. This repurchase liability is reported in other liabilities on the consolidated balance sheets and reflects management’s estimate of losses based on historical repurchase and loss trends, as well as other factors that may result in anticipated losses different from historical loss trends. Adjustments to this reserve are recorded in other non-interest expense on the consolidated statements of income. COMMERCIAL MORTGAGE BANKING ACTIVITIES Regions is an approved DUS lender. The DUS program provides liquidity to the multi-family housing market. In connection with the DUS program, Regions services commercial mortgage loans, retains commercial MSRs and intangible assets associated with the DUS license, and assumes a loss share guarantee associated with the loans. See Note 1 "Summary of Significant Accounting Policies" in the 2020 Annual Report on Form 10-K for additional information. Also see Note 11 for additional information. The table below presents an analysis of commercial MSRs under the amortization measurement method: Three Months Ended March 31 2021 2020 (In millions) Carrying value, beginning of period $ 74 $ 59 Additions 11 3 Economic amortization associated with borrower repayments (1) (3) (3) Carrying value, end of period $ 82 $ 59 ________ (1) "Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns. Regions periodically evaluates the commercial MSRs for impairment based on fair value. The estimated fair value of the commercial MSRs was approximately $91 million at March 31, 2021 and $81 million December 31, 2020. The following table presents servicing related fees, which includes contractually specified servicing fees, late fees and other ancillary income resulting from the servicing of commercial mortgage loans: Three Months Ended March 31 2021 2020 (In millions) Servicing related fees and other ancillary income $ 5 $ 5

Stockholders' Equity and Accumu

Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)	NOTE 5. SHAREHOLDERS’ EQUITY AND ACCUMULATED OTHER COMPREHENSIVE INCOME PREFERRED STOCK The following table presents a summary of the non-cumulative perpetual preferred stock: March 31, 2021 December 31, 2020 Issuance Date Earliest Redemption Date Dividend Rate (1) Liquidation Amount Liquidation Preference per Share Liquidation preference per Depositary Share Ownership Interest per Depositary Share Carrying Amount Carrying Amount (Dollars in millions, except per share data) Series A 11/1/2012 12/15/2017 6.375 % $ 500 $ 1,000 $ 25 1/40th $ 387 $ 387 Series B 4/29/2014 9/15/2024 6.375 % (2) 500 1,000 25 1/40th 433 433 Series C 4/30/2019 5/15/2029 5.700 % (3) 500 1,000 25 1/40th 490 490 Series D 6/5/2020 9/15/2025 5.750 % (4) 350 100,000 1,000 1/100th 346 346 $ 1,850 $ 1,656 $ 1,656 _________ (1) Dividends on all series of preferred stock, if declared, accrue and are payable quarterly in arrears. (2) Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2024, 6.375%, and (ii) for each period beginning on or after September 15, 2024, three-month LIBOR plus 3.536%. (3) Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to August 15, 2029, 5.700%, and (ii) for each period beginning on or after August 15, 2029, three-month LIBOR plus 3.148%. (4) Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2025, 5.750%, and (ii) for each period beginning on or after September 15, 2025, the five-year treasury rate as of the most recent reset dividend determination date plus 5.426%. All series of preferred stock have no stated maturity and redemption is solely at Regions' option, subject to regulatory approval, in whole, or in part, after the earliest redemption date or in whole, but not in part, within 90 days following a regulatory capital treatment event for the Series A preferred stock or at any time following a regulatory capital treatment event for the Series B, Series C, and Series D preferred stock. The Board of Directors declared a total of $23 million in cash dividends on Series A, Series B and Series C preferred stock during both the first three months of 2021 and 2020. The Board of Directors declared $5 million in cash dividends on Series D preferred stock during the first three months of 2021. Therefore, a total of $28 million in cash dividends on total preferred stock was declared in the first three months of 2021 compared to the total of $23 million in cash dividends on total preferred stock declared in the first three months of 2020, as the initial quarterly dividend for the Series D preferred stock was declared in the third quarter of 2020. In the event Series A, Series B, Series C, or Series D preferred shares are redeemed at the liquidation amounts, $113 million, $67 million, $10 million, or $4 million in excess of the redemption amount over the carrying amount will be recognized, respectively. Approximately $100 million of Series A preferred dividends that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to retained earnings, and approximately $13 million of related issuance costs that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to net income available to common shareholders. Approximately $52 million of Series B preferred dividends that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to retained earnings, and approximately $15 million of related issuance costs that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to net income available to common shareholders. Approximately $10 million of Series C issuance costs that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to net income available to common shareholders. Approximately $4 million of Series D issuance costs that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to net income available to common shareholders. On April 27, 2021 Regions launched a proposed public offering, which was completed on May 4, 2021, for the issuance of $400 million in depositary shares each representing a 1/40th ownership interest in a share of the Company's 4.45% Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share ("Series E preferred stock"), with a liquidation preference of $1,000 per share of Series E preferred stock (equivalent to $25.00 per depositary share). Dividends will be paid quarterly at an annual rate equal to 4.45% for each period beginning September 15, 2021. The net proceeds from the issuance of the Series E preferred stock will be used to redeem all of the outstanding shares of the Company's Series A preferred stock. On May 4, 2021, Regions sent redemption notices to the holders of the Series A preferred stock, which will result in the redemption on the dividend payment date on June 15, 2021. COMMON STOCK Regions was not required to participate in the 2021 CCAR; the Company chose to participate in part to have the Federal Reserve re-evaluate Regions' SCB. The submission was made in April 2021 and the Company expects to receive the results by June 30, 2021, with an effective date October 1, 2021. As part of the Company's capital plan, on April 21, 2021, the Board authorized the repurchase of up to $2.5 billion of the Company's common stock, permitting purchases from the second quarter of 2021 through the first quarter of 2022. The Company did not repurchase shares in the first quarter of 2021 or throughout 2020. During the third quarter of 2020, the Federal Reserve mandated that banks must not increase their quarterly per share common dividend and implemented an earnings-based payout restriction in connection with the supervisory stress test, requiring the third quarter 2020 dividend to not exceed the average of the prior four quarters of net income excluding preferred dividends. This mandate was subsequently extended through the second quarter of 2021. The Federal Reserve has indicated these restrictions are expected to be lifted beginning in the third quarter of 2021, subject to capital remaining above required levels in the ongoing 2021 CCAR cycle. Regions declared $0.155 per share in cash dividends for both the first quarter of 2021 and 2020. ACCUMULATED OTHER COMPREHENSIVE INCOME The following tables present the balances and activity in AOCI on a pre-tax and net of tax basis for the three months ended March 31, 2021 and 2020: Three Months Ended March 31, 2021 Pre-tax AOCI Activity Tax Effect (1) Net AOCI Activity (In millions) Total accumulated other comprehensive income, beginning of period $ 1,759 $ (444) $ 1,315 Unrealized losses on securities transferred to held to maturity: Beginning balance $ (21) $ 5 $ (16) Reclassification adjustments for amortization of unrealized losses (2) 3 (1) 2 Ending balance $ (18) $ 4 $ (14) Unrealized gains (losses) on securities available for sale: Beginning balance $ 1,062 $ (268) $ 794 Unrealized gains (losses) arising during the period (548) 138 (410) Reclassification adjustments for securities (gains) losses realized in net income (loss) (3) (1) — (1) Change in AOCI from securities available for sale activity in the period (549) 138 (411) Ending balance $ 513 $ (130) $ 383 Unrealized gains (losses) on derivative instruments designated as cash flow hedges: Beginning balance $ 1,610 $ (406) $ 1,204 Unrealized holding gains (losses) on derivatives arising during the period (331) 83 (248) Reclassification adjustments for (gains) losses realized in net income (2) (102) 26 (76) Change in AOCI from derivative activity in the period (433) 109 (324) Ending balance $ 1,177 $ (297) $ 880 Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (892) $ 225 $ (667) Reclassification adjustments for amortization of actuarial gains (losses) and settlements realized in net income (4) 13 (3) 10 Ending balance $ (879) $ 222 $ (657) Total other comprehensive income (966) 243 (723) Total accumulated other comprehensive income, end of period $ 793 $ (201) $ 592 Three Months Ended March 31, 2020 Pre-tax AOCI Activity Tax Effect (1) Net AOCI Activity (In millions) Total accumulated other comprehensive income (loss), beginning of period $ (120) $ 30 $ (90) Unrealized losses on securities transferred to held to maturity: Beginning balance $ (29) $ 7 $ (22) Reclassification adjustments for amortization of unrealized losses (2) 1 — 1 Ending balance $ (28) $ 7 $ (21) Unrealized gains (losses) on securities available for sale: Beginning balance $ 274 $ (69) $ 205 Unrealized gains (losses) arising during the period 597 (151) 446 Ending balance $ 871 $ (220) $ 651 Unrealized gains (losses) on derivative instruments designated as cash flow hedges: Beginning balance $ 430 $ (108) $ 322 Unrealized holding gains (losses) on derivatives arising during the period 1,291 (325) 966 Reclassification adjustments for (gains) losses realized in income (2) (9) 2 (7) Change in AOCI from derivative activity in the period 1,282 (323) 959 Ending balance $ 1,712 $ (431) $ 1,281 Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (795) $ 200 $ (595) Reclassification adjustments for amortization of actuarial gains (losses) and settlements realized in net income (4) 11 (3) 8 Ending balance $ (784) $ 197 $ (587) Total other comprehensive income 1,891 (477) 1,414 Total accumulated other comprehensive income, end of period $ 1,771 $ (447) $ 1,324 _________ (1) The impact of all AOCI activity is shown net of the related tax impact, calculated using an effective tax rate of approximately 25%. (2) Reclassification amount is recognized in net interest income in the consolidated statements of income. (3) Reclassification amount is recognized in securities gains (losses), net in the consolidated statements of income. (4) Reclassification amount is recognized in other non-interest expense in the consolidated statements of income. Additionally, these accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost (see Note 7 for additional details).

Earnings (Loss) Per Common Shar

Earnings (Loss) Per Common Share	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings (Loss) Per Common Share	NOTE 6. EARNINGS PER COMMON SHARE The following table sets forth the computation of basic earnings per common share and diluted earnings per common share: Three Months Ended March 31 2021 2020 (In millions, except per share amounts) Numerator: Net income $ 642 $ 162 Preferred stock dividends (28) (23) Net income available to common shareholders $ 614 $ 139 Denominator: Weighted-average common shares outstanding—basic 961 957 Potential common shares 7 4 Weighted-average common shares outstanding—diluted 968 961 Earnings per common share: Basic $ 0.64 $ 0.15 Diluted 0.63 0.14

Pension and Other Postretiremen

Pension and Other Postretirement Benefits	3 Months Ended
	Mar. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Pension and Other Postretirement Benefits	NOTE 7. PENSION AND OTHER POSTRETIREMENT BENEFITS Regions' defined benefit pension plans cover certain employees as the pension plans are closed to new entrants. The Company also sponsors a SERP, which is a non-qualified pension plan that provides certain senior executive officers defined benefits in relation to their compensation. Net periodic pension cost (credit) includes the following components: Qualified Plans Non-qualified Plans Total Three Months Ended March 31 2021 2020 2021 2020 2021 2020 (In millions) Service cost $ 9 $ 9 $ 1 $ 1 $ 10 $ 10 Interest cost 12 16 1 1 13 17 Expected return on plan assets (35) (37) — — (35) (37) Amortization of actuarial loss 11 9 2 2 13 11 Net periodic pension cost (credit) $ (3) $ (3) $ 4 $ 4 $ 1 $ 1 The service cost component of net periodic pension cost (credit) is recorded in salaries and employee benefits on the consolidated statements of income. Components other than service cost are recorded in other non-interest expense on the consolidated statements of income. Regions' funding policy for the qualified plans is to contribute annually at least the amount required by IRS minimum funding standards. Regions made no contributions during the first three months of 2021.

Derivative Financial Instrument

Derivative Financial Instruments and Hedging Activities	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging Activities	NOTE 8. DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES The following tables present the notional amount and estimated fair value of derivative instruments on a gross basis. March 31, 2021 December 31, 2020 Notional Estimated Fair Value Notional Estimated Fair Value Gain (1) Loss (1) Gain (1) Loss (1) (In millions) Derivatives in fair value hedging relationships: Interest rate swaps $ 1,750 $ 59 $ 13 $ 2,100 $ 77 $ — Derivatives in cash flow hedging relationships: Interest rate swaps (2) 18,000 $ 762 $ 2 16,000 1,181 — Interest rate floors (3)(4) 3,750 $ 226 $ — 5,750 430 — Total derivatives in cash flow hedging relationships 21,750 $ 988 $ 2 21,750 1,611 — Total derivatives designated as hedging instruments $ 23,500 $ 1,047 $ 15 $ 23,850 $ 1,688 $ — Derivatives not designated as hedging instruments: Interest rate swaps $ 77,082 $ 1,057 $ 1,107 $ 76,764 $ 1,492 $ 1,464 Interest rate options 15,776 $ 75 $ 25 13,806 90 28 Interest rate futures and forward commitments 3,810 $ 38 $ 6 4,270 11 26 Other contracts 9,181 $ 83 $ 80 9,924 68 80 Total derivatives not designated as hedging instruments $ 105,849 $ 1,253 $ 1,218 $ 104,764 $ 1,661 $ 1,598 Total derivatives $ 129,349 $ 2,300 $ 1,233 $ 128,614 $ 3,349 $ 1,598 Total gross derivative instruments, before netting $ 2,300 $ 1,233 $ 3,349 $ 1,598 Less: Netting adjustments (5) $ 1,686 $ 1,148 2,428 1,545 Total gross derivative instruments, after netting (6) $ 614 $ 85 $ 921 $ 53 _________ (1) Derivatives in a gain position are recorded as other assets and derivatives in a loss position are recorded as other liabilities on the consolidated balance sheets. (2) Includes accrued interest of $28 million at March 31, 2021 and December 31, 2020, respectively. (3) Includes accrued interest of $9 million at March 31, 2021 and $12 million at December 31, 2020. (4) Estimated fair value includes premium of approximately $51 million as of March 31, 2021 and $83 million as of December 31, 2020 to be amortized over the remaining life. Approximately $29 million of the decrease since December 31, 2020 related to hedges that were terminated during the first quarter of 2021 and were not amortized into earnings as of the date of termination. (5) Netting adjustments represent amounts recorded to convert derivative assets and derivative liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of cash collateral received or posted, legally enforceable master netting agreements and variation margin that allow Regions to settle derivative contracts with the counterparty on a net basis and to offset the net position with the related cash collateral. (6) The gain amounts,which are not collateralized with cash or other assets or reserved for, represent the net credit risk on all trading and other derivative positions. As of March 31, 2021 and December 31, 2020, financial instruments posted of $24 million, for both periods, were not offset in the consolidated balance sheets. HEDGING DERIVATIVES Derivatives entered into to manage interest rate risk and facilitate asset/liability management strategies are designated as hedging derivatives. Derivative financial instruments that qualify in a hedging relationship are classified, based on the exposure being hedged, as either fair value hedges or cash flow hedges. See Note 1 "Summary of Significant Accounting Policies" of the Annual Report on Form 10-K for the year ended December 31, 2020, for additional information regarding accounting policies for derivatives. FAIR VALUE HEDGES Fair value hedge relationships mitigate exposure to the change in fair value of an asset, liability or firm commitment. Regions enters into interest rate swap agreements to manage interest rate exposure on the Company’s fixed-rate borrowings. These agreements involve the receipt of fixed-rate amounts in exchange for floating-rate interest payments over the life of the agreements. Regions enters into interest rate swap agreements to manage interest rate exposure on certain of the Company's fixed-rate available for sale debt securities. These agreements involve the payment of fixed-rate amounts in exchange for floating-rate interest receipts. CASH FLOW HEDGES Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. Regions enters into interest rate swap and floor agreements to manage overall cash flow changes related to interest rate risk exposure on LIBOR-based loans. The agreements effectively modify the Company’s exposure to interest rate risk by utilizing receive fixed/pay LIBOR interest rate swaps and interest rate floors. As of March 31, 2021, Regions is hedging its exposure to the variability in future cash flows for forecasted transactions through 2026. During the three months ended March 31, 2021, the Company terminated $2.0 billion and $2.6 billion in notional of floor and swap hedges, respectively.The following table presents the pre-tax impact of terminated cash flow hedges on AOCI. The balance of terminated cash flow hedges in AOCI will be amortized into earnings through 2025. Three Months Ended March 31 2021 2020 (In millions) Unrealized gains on terminated hedges included in AOCI- January 1 $ 121 $ 78 Unrealized gains (losses) on terminated hedges arising during the period 166 (6) Reclassification adjustments for amortization of unrealized (gains) into net income (8) (2) Unrealized gains on terminated hedges included in AOCI-March 31 $ 279 $ 70 Regions expects to reclassify into earnings approximately $420 million in pre-tax income due to the receipt or payment of interest payments and floor premium amortization on all cash flow hedges within the next twelve months. Included in this amount is $93 million in pre-tax net gains related to the amortization of discontinued cash flow hedges. The following tables present the effect of hedging derivative instruments on the consolidated statements of income and the total amounts for the respective line items effected: Three Months Ended March 31, 2021 Interest Income Interest Expense Loans, Including Fees Long-term Borrowings (In millions) Total amounts presented in the consolidated statements of income $ 854 $ 27 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ — $ 7 Recognized on derivatives — (22) Recognized on hedged items — 22 Net income recognized on fair value hedges $ — $ 7 Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ 102 $ — Income (expense) recognized on cash flow hedges $ 102 $ — Three Months Ended March 31, 2020 Interest Income Interest Expense Loans, Including Fees Long-term Borrowings (In millions) Total amounts presented in the consolidated statements of income $ 903 $ 59 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ — $ 4 Recognized on derivatives — 77 Recognized on hedged items — (76) Net income recognized on fair value hedges $ — $ 5 Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ 9 $ — Income (expense) recognized on cash flow hedges $ 9 $ — ___ (1) See Note 5 for gain or (loss) recognized for cash flow hedges in AOCI. (2) Pre-tax. The following tables present the carrying amount and associated cumulative basis adjustment related to the application of hedge accounting that is included in the carrying amount of hedged assets and liabilities in fair value hedging relationships. March 31, 2021 December 31, 2020 Hedged Items Currently Designated Hedged Items Currently Designated Carrying Amount of Assets/(Liabilities) Hedge Accounting Basis Adjustment Carrying Amount of Assets/(Liabilities) Hedge Accounting Basis Adjustment (In millions) Long-term borrowings $ (1,790) $ (42) $ (2,171) $ (64) DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS The Company holds a portfolio of interest rate swaps, option contracts, and futures and forward commitments that result from transactions with its commercial customers in which they manage their risks by entering into a derivative with Regions. The Company monitors and manages the net risk in this customer portfolio and enters into separate derivative contracts in order to reduce the overall exposure to pre-defined limits. For both derivatives with its end customers and derivatives Regions enters into to mitigate the risk in this portfolio, the Company is subject to market risk and the risk that the counterparty will default. The contracts in this portfolio are not designated as accounting hedges and are marked-to market through earnings (in capital markets fee income) and included in other assets and other liabilities, as appropriate. Regions enters into interest rate lock commitments, which are commitments to originate mortgage loans whereby the interest rate on the loan is determined prior to funding and the customers have locked into that interest rate. At March 31, 2021 and December 31, 2020, Regions had $894 million and $924 million, respectively, in total notional amount of interest rate lock commitments. Regions manages market risk on interest rate lock commitments and mortgage loans held for sale with corresponding forward sale commitments. Residential mortgage loans held for sale are recorded at fair value with changes in fair value recorded in mortgage income. Commercial mortgage loans held for sale are recorded at either the lower of cost or market or at fair value based on management's election. At March 31, 2021 and December 31, 2020, Regions had $1.8 billion and $1.9 billion, respectively, in total notional amounts related to these forward sale commitments. Changes in mark-to-market from both interest rate lock commitments and corresponding forward sale commitments related to residential mortgage loans are included in mortgage income. Changes in mark-to-market from both interest rate lock commitments and corresponding forward sale commitments related to commercial mortgage loans are included in capital markets income. Regions has elected to account for residential MSRs at fair value with any changes to fair value recorded in mortgage income. Concurrent with the election to use the fair value measurement method, Regions began using various derivative instruments in the form of forward rate commitments, futures contracts, swaps and swaptions to mitigate the effect of changes in the fair value of its residential MSRs in its consolidated statements of income. As of March 31, 2021 and December 31, 2020, the total notional amount related to these contracts was $4.3 billion and $4.1 billion, respectively. The following table presents the location and amount of gain or (loss) recognized in income on derivatives not designated as hedging instruments in the consolidated statements of income for the periods presented below: Three Months Ended March 31 Derivatives Not Designated as Hedging Instruments 2021 2020 (In millions) Capital markets income: Interest rate swaps $ 23 $ (37) Interest rate options 15 16 Interest rate futures and forward commitments 9 5 Other contracts 5 (10) Total capital markets income 52 (26) Mortgage income: Interest rate swaps (67) 98 Interest rate options (13) 24 Interest rate futures and forward commitments 30 (16) Total mortgage income (50) 106 $ 2 $ 80 CREDIT DERIVATIVES Regions has both bought and sold credit protection in the form of participations on interest rate swaps (swap participations). These swap participations, which meet the definition of credit derivatives, were entered into in the ordinary course of business to serve the credit needs of customers. Swap participations, whereby Regions has purchased credit protection, entitle Regions to receive a payment from the counterparty if the customer fails to make payment on any amounts due to Regions upon early termination of the swap transaction and have maturities between 2021 and 2029. Swap participations, whereby Regions has sold credit protection have maturities between 2021 and 2038. For contracts where Regions sold credit protection, Regions would be required to make payment to the counterparty if the customer fails to make payment on any amounts due to the counterparty upon early termination of the swap transaction. Regions bases the current status of the prepayment/performance risk on bought and sold credit derivatives on recently issued internal risk ratings consistent with the risk management practices of unfunded commitments. Regions’ maximum potential amount of future payments under these contracts as of March 31, 2021 was approximately $520 million. This scenario occurs if variable interest rates were at zero percent and all counterparties defaulted with zero recovery. The fair value of sold protection at March 31, 2021 and 2020 was immaterial. In transactions where Regions has sold credit protection, recourse to collateral associated with the original swap transaction is available to offset some or all of Regions’ obligation. Regions has bought credit protection in the form of credit default indices. These indices, which meet the definition of credit derivatives, were entered into in the ordinary course of business to economically hedge credit spread risk in commercial mortgage loans held for sale whereby the fair value option has been elected. Credit derivatives, whereby Regions has purchased credit protection, entitle Regions to receive a payment from the counterparty if losses on the underlying index exceed a certain threshold, dependent upon the tranche rating of the capital structure. CONTINGENT FEATURES Certain of Regions’ derivative instrument contracts with broker-dealers contain credit-related termination provisions and/or credit-related provisions regarding the posting of collateral, allowing those broker-dealers to terminate the contracts in the event that Regions’ and/or Regions Bank’s credit ratings falls below specified ratings from certain major credit rating agencies. The aggregate fair values of all derivative instruments with any credit-risk-related contingent features that were in a liability position on March 31, 2021 and December 31, 2020, were $95 million and $74 million, respectively, for which Regions had posted collateral of $99 million and $74 million, respectively, in the normal course of business.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 9. FAIR VALUE MEASUREMENTS See Note 1 "Summary of Significant Accounting Policies" to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2020 for a description of valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis. Assets and liabilities measured at fair value rarely transfer between Level 1 and Level 2 measurements. Marketable equity securities and debt securities available for sale may be periodically transferred to or from Level 3 valuation based on management’s conclusion regarding the observability of inputs used in valuing the securities. Such transfers are accounted for as if they occur at the beginning of a reporting period. The following table presents assets and liabilities measured at estimated fair value on a recurring basis and non-recurring basis: March 31, 2021 December 31, 2020 Level 1 Level 2 Level 3 (1) Total Estimated Fair Value Level 1 Level 2 Level 3 (1) Total Estimated Fair Value (In millions) Recurring fair value measurements Debt securities available for sale: U.S. Treasury securities $ 232 $ — $ — $ 232 $ 183 $ — $ — $ 183 Federal agency securities — 98 — 98 — 105 — 105 Mortgage-backed securities (MBS): Residential agency — 18,846 — 18,846 — 19,076 — 19,076 Residential non-agency — — 1 1 — — 1 1 Commercial agency — 6,199 — 6,199 — 5,999 — 5,999 Commercial non-agency — 570 — 570 — 586 — 586 Corporate and other debt securities — 1,142 4 1,146 — 1,200 4 1,204 Total debt securities available for sale $ 232 $ 26,855 $ 5 $ 27,092 $ 183 $ 26,966 $ 5 $ 27,154 Loans held for sale $ — $ 1,169 $ — $ 1,169 $ — $ 1,446 $ — $ 1,446 Marketable equity securities $ 443 $ — $ — $ 443 $ 388 $ — $ — $ 388 Residential mortgage servicing rights $ — $ — $ 401 $ 401 $ — $ — $ 296 $ 296 Derivative assets (2) : Interest rate swaps $ — $ 1,878 $ — $ 1,878 $ — $ 2,750 $ — $ 2,750 Interest rate options — 270 31 301 — 477 43 520 Interest rate futures and forward commitments — 38 — 38 — 11 — 11 Other contracts 1 82 — 83 2 65 1 68 Total derivative assets $ 1 $ 2,268 $ 31 $ 2,300 $ 2 $ 3,303 $ 44 $ 3,349 Equity investments $ — $ — $ — $ — $ — $ 74 $ — $ 74 Derivative liabilities (2) : Interest rate swaps $ — $ 1,122 $ — $ 1,122 $ — $ 1,464 $ — $ 1,464 Interest rate options — 25 — 25 — 28 — 28 Interest rate futures and forward commitments — 6 — 6 — 26 — 26 Other contracts 1 75 4 80 2 72 6 80 Total derivative liabilities $ 1 $ 1,228 $ 4 $ 1,233 $ 2 $ 1,590 $ 6 $ 1,598 Non-recurring fair value measurements Loans held for sale $ — $ — $ 8 $ 8 $ — $ — $ 4 $ 4 Equity investments without a readily determinable fair value — — — — — — 12 12 Foreclosed property and other real estate — — 16 16 — — 5 5 _________ (1) All following disclosures related to Level 3 recurring and non-recurring assets do not include those deemed to be immaterial. (2) As permitted under U.S. GAAP, variation margin collateral payments made or received for derivatives that are centrally cleared are legally characterized as settled. As such, these derivative assets and derivative liabilities and the related variation margin collateral are presented on a net basis on the balance sheet. Assets and liabilities in all levels could result in volatile and material price fluctuations. Realized and unrealized gains and losses on Level 3 assets represent only a portion of the risk to market fluctuations in Regions’ consolidated balance sheets. Further, derivatives included in Levels 2 and 3 are used by ALCO in a holistic approach to managing price fluctuation risks. The following tables illustrate rollforwards for residential mortgage servicing rights, which are the only material assets or liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2021 and 2020, respectively. Residential mortgage servicing rights Three Months Ended March 31 2021 2020 (In millions) Carrying value, beginning of period $ 296 $ 345 Total realized/unrealized gains (losses) included in earnings (1) 73 (102) Purchases 32 11 Carrying value, end of period $ 401 $ 254 _________ (1) Included in mortgage income. Amounts presented exclude offsetting impact from related derivatives. The following table presents the fair value adjustments related to non-recurring fair value measurements: Three Months Ended March 31 2021 2020 (In millions) Loans held for sale $ (3) $ (3) Equity investments without a readily determinable fair value — (3) Foreclosed property and other real estate (7) (9) The following tables present detailed information regarding material assets and liabilities measured at fair value using significant unobservable inputs (Level 3) as of March 31, 2021, and December 31, 2020. The tables include the valuation techniques and the significant unobservable inputs utilized. The range of each significant unobservable input as well as the weighted-average within the range utilized at March 31, 2021, and December 31, 2020, are included. Following the tables are descriptions of the valuation techniques and the sensitivity of the techniques to changes in the significant unobservable inputs. March 31, 2021 Level 3 Estimated Fair Value at March 31, 2021 Valuation Unobservable Quantitative Range of (Dollars in millions) Recurring fair value measurements: Residential mortgage servicing rights (1) $401 Discounted cash flow Weighted-average CPR (%) 5.4% - 21.9% (10.2%) OAS (%) 4.8% - 9.5% (5.6%) _________ (1) See Note 4 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights. December 31, 2020 Level 3 Estimated Fair Value at December 31, 2020 Valuation Unobservable Quantitative Range of (Dollars in millions) Recurring fair value measurements: Residential mortgage servicing rights (1) $296 Discounted cash flow Weighted-average CPR (%) 8.1% - 31.2% (15.6%) OAS (%) 4.8% - 9.5% (5.6%) _________ (1) See Note 7 to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2020 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights. RECURRING FAIR VALUE MEASUREMENTS USING SIGNIFICANT UNOBSERVABLE INPUTS Residential mortgage servicing rights The significant unobservable inputs used in the fair value measurement of residential MSRs are OAS and CPR. This valuation requires generating cash flow projections over multiple interest rate scenarios and discounting those cash flows at a risk-adjusted rate. Additionally, the impact of prepayments and changes in the OAS are based on a variety of underlying inputs including servicing costs. Increases or decreases to the underlying cash flow inputs will have a corresponding impact on the value of the MSR asset. The net change in unrealized gains (losses) included in earnings related to MSRs held at period end are disclosed as the changes in valuation inputs or assumptions included in the MSR rollforward table in Note 4. FAIR VALUE OPTION Regions has elected the fair value option for all eligible agency residential mortgage loans and certain commercial mortgage loans originated with the intent to sell. These elections allow for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting. Regions has not elected the fair value option for other loans held for sale primarily because they are not economically hedged using derivative instruments. Fair values of residential mortgage loans held for sale are based on traded market prices of similar assets where available and/or discounted cash flows at market interest rates, adjusted for securitization activities that include servicing values and market conditions, and are recorded in loans held for sale in the consolidated balance sheets. The Company also elected to measure certain commercial and industrial loans held for sale at fair value, as these loans are actively traded in the secondary market. The Company is able to obtain fair value estimates for substantially all of these loans through a third party valuation service that is broadly used by market participants. While most of the loans are traded in the market, the volume and level of trading activity is subject to variability and the loans are not exchange-traded. The balance of these loans held for sale was immaterial at March 31, 2021. The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for mortgage loans held for sale measured at fair value: March 31, 2021 December 31, 2020 Aggregate Aggregate Aggregate Fair Aggregate Aggregate Aggregate Fair (In millions) Mortgage loans held for sale, at fair value $ 1,163 $ 1,136 $ 27 $ 1,439 $ 1,362 $ 77 Interest income on mortgage loans held for sale is recognized based on contractual rates and is reflected in interest income on loans held for sale in the consolidated statements of income. The following table details net gains and losses resulting from changes in fair value of these loans, which were recorded in mortgage income in the consolidated statements of income during the three months ended March 31, 2021 and 2020. These changes in fair value are mostly offset by economic hedging activities. An immaterial portion of these amounts was attributable to changes in instrument-specific credit risk. Three Months Ended March 31 2021 2020 (In millions) Net gains (losses) resulting for the change in fair value of mortgage loans held for sale $ (50) $ 10 The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments as of March 31, 2021 are as follows: March 31, 2021 Carrying Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 24,920 $ 24,920 $ 24,920 $ — $ — Debt securities held to maturity 1,059 1,131 — 1,131 — Debt securities available for sale 27,092 27,092 232 26,855 5 Loans held for sale 1,487 1,487 — 1,479 8 Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 81,335 82,156 — — 82,156 Other earning assets (4) 1,074 1,074 443 631 — Derivative assets 2,300 2,300 1 2,268 31 Financial liabilities: Derivative liabilities 1,233 1,233 1 1,228 4 Deposits 129,602 129,624 — 129,624 — Long-term borrowings 2,916 3,351 — 3,086 265 Loan commitments and letters of credit 119 119 — — 119 _________ (1) Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company makes adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. (2) The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. The fair value premium on the loan portfolio's net carrying amount at March 31, 2021 was $821 million or 1.0 percent. (3) Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.4 billion at March 31, 2021. (4) Excluded from this table is the operating lease carrying amount of $188 million at March 31, 2021 . The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company's financial instruments as of December 31, 2020 are as follows: December 31, 2020 Carrying Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 17,956 $ 17,956 $ 17,956 $ — $ — Debt securities held to maturity 1,122 1,215 — 1,215 — Debt securities available for sale 27,154 27,154 183 26,966 5 Loans held for sale 1,905 1,905 — 1,901 4 Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 81,597 82,773 — — 82,773 Other earning assets (4) 1,017 1,017 388 629 — Derivative assets 3,349 3,349 2 3,303 44 Equity investments 74 74 — 74 — Financial liabilities: Derivative liabilities 1,598 1,598 2 1,590 6 Deposits 122,479 122,511 — 122,511 — Long-term borrowings 3,569 4,063 — 3,592 471 Loan commitments and letters of credit 151 151 — — 151 _________ (1) Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company makes adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. (2) The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. The fair value premium on the loan portfolio's net carrying amount at December 31, 2020 was $1.2 billion or 1.4 percent. (3) Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.5 billion at December 31, 2020. (4) Excluded from this table is the operating lease carrying amount of $200 million at December 31, 2020.

Business Segment Information

Business Segment Information	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Business Segment Information	NOTE 10. BUSINESS SEGMENT INFORMATION Each of Regions’ reportable segments is a strategic business unit that serves specific needs of Regions’ customers based on the products and services provided. The segments are based on the manner in which management views the financial performance of the business. The Company has three reportable segments: Corporate Bank, Consumer Bank, and Wealth Management, with the remainder in Other. Additional information about the Company's reportable segments is included in Regions' Annual Report on Form 10-K for the year ended December 31, 2020. The application and development of management reporting methodologies is a dynamic process and is subject to periodic enhancements. As these enhancements are made, financial results presented by each reportable segment may be periodically revised. Accordingly, the prior period was updated to reflect these enhancements. In the first quarter of 2021, the net interest income allocation methodology was enhanced. All net interest income including the FTP offset, activities of the treasury function, securities portfolio and interest rate risk activities is allocated to the three reporting segments. The following tables present financial information for each reportable segment for the period indicated. Three Months Ended March 31, 2021 Corporate Bank Consumer Wealth Other Consolidated (In millions) Net interest income $ 435 $ 497 $ 35 $ — $ 967 Provision for (benefit from) credit losses 79 73 3 (297) (142) Non-interest income 193 331 92 25 641 Non-interest expense 267 529 94 38 928 Income (loss) before income taxes 282 226 30 284 822 Income tax expense (benefit) 70 57 7 46 180 Net income (loss) $ 212 $ 169 $ 23 $ 238 $ 642 Average assets $ 59,492 $ 34,053 $ 2,047 $ 50,962 $ 146,554 Three Months Ended March 31, 2020 Corporate Bank Consumer Bank Wealth Other Consolidated (In millions) Net interest income $ 352 $ 538 $ 38 $ — $ 928 Provision for credit losses 53 88 4 228 373 Non-interest income (loss) 104 315 87 (21) 485 Non-interest expense 235 499 87 15 836 Income (loss) before income taxes 168 266 34 (264) 204 Income tax expense (benefit) 42 67 9 (76) 42 Net income (loss) $ 126 $ 199 $ 25 $ (188) $ 162 Average assets $ 55,085 $ 34,600 $ 2,060 $ 33,026 $ 124,771

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	NOTE 11. COMMITMENTS, CONTINGENCIES AND GUARANTEES COMMERCIAL COMMITMENTS Regions issues off-balance sheet financial instruments in connection with lending activities. The credit risk associated with these instruments is essentially the same as that involved in extending loans to customers and is subject to Regions’ normal credit approval policies and procedures. Regions measures inherent risk associated with these instruments by recording a reserve for unfunded commitments based on an assessment of the likelihood that the guarantee will be funded and the creditworthiness of the customer or counterparty. Collateral is obtained based on management’s assessment of the creditworthiness of the customer. Credit risk is represented in unused commitments to extend credit, standby letters of credit and commercial letters of credit. Refer to Note 24 "Commitments, Contingencies and Guarantees" in the Annual Report on Form 10-K for the year ended December 31, 2020 for more information regarding these instruments. Credit risk associated with these instruments is represented by the contractual amounts indicated in the following table: March 31, 2021 December 31, 2020 (In millions) Unused commitments to extend credit $ 59,377 $ 56,644 Standby letters of credit 1,660 1,742 Commercial letters of credit 72 132 Liabilities associated with standby letters of credit 27 25 Assets associated with standby letters of credit 27 25 Reserve for unfunded credit commitments 92 126 LEGAL CONTINGENCIES Regions and its subsidiaries are subject to loss contingencies related to litigation, claims, investigations and legal and administrative cases and proceedings arising in the ordinary course of business. Regions evaluates these contingencies based on information currently available, including advice of counsel. Regions establishes accruals for those matters when a loss contingency is considered probable and the related amount is reasonably estimable. Any accruals are periodically reviewed and may be adjusted as circumstances change. Some of Regions' exposure with respect to loss contingencies may be offset by applicable insurance coverage. In determining the amounts of any accruals or estimates of possible loss contingencies however, Regions does not take into account the availability of insurance coverage. To the extent that Regions has an insurance recovery, the proceeds are recorded in the period the recovery is received. When it is practicable, Regions estimates possible loss contingencies, whether or not there is an accrued probable loss. When Regions is able to estimate such possible losses, and when it is reasonably possible Regions could incur losses in excess of amounts accrued, Regions discloses the aggregate estimation of such possible losses. Regions currently estimates that it is reasonably possible that it may experience losses in excess of what Regions has accrued in an aggregate amount of up to approximately $20 million as of March 31, 2021, with it also being reasonably possible that Regions could incur no losses in excess of amounts accrued. However, as available information changes, the matters for which Regions is able to estimate, as well as the estimates themselves will be adjusted accordingly. Assessments of litigation and claims exposure are difficult because they involve inherently unpredictable factors including, but not limited to, the following: whether the proceeding is in the early stages; whether damages are unspecified, unsupported, or uncertain; whether there is a potential for punitive or other pecuniary damages; whether the matter involves legal uncertainties, including novel issues of law; whether the matter involves multiple parties and/or jurisdictions; whether discovery has begun or is not complete; whether meaningful settlement discussions have commenced; and whether the lawsuit involves class allegations. Assessments of class action litigation, which is generally more complex than other types of litigation, are particularly difficult, especially in the early stages of the proceeding when it is not known whether a class will be certified or how a potential class, if certified, will be defined. As a result, Regions may be unable to estimate reasonably possible losses with respect to some of the matters disclosed below, and the aggregated estimated amount discussed above may not include an estimate for every matter disclosed below. Regions is involved in formal and informal information-gathering requests, investigations, reviews, examinations and proceedings by various governmental regulatory agencies, law enforcement authorities and self-regulatory bodies regarding Regions’ business, Regions' business practices and policies, and the conduct of persons with whom Regions does business. As previously disclosed, Regions is cooperating with an investigation by the CFPB into certain of Regions' overdraft practices and policies. Additional inquiries will arise from time to time. In connection with those inquiries, Regions receives document requests, subpoenas and other requests for information. The inquiries could develop into administrative, civil or criminal proceedings or enforcement actions that could result in consequences that have a material effect on Regions' consolidated financial position, results of operations or cash flows as a whole. Such consequences could include adverse judgments, findings, settlements, penalties, fines, orders, injunctions, restitution, or alterations in our business practices, and could result in additional expenses and collateral costs, including reputational damage. While the final outcome of litigation and claims exposures or of any inquiries is inherently unpredictable, management is currently of the opinion that the outcome of pending and threatened litigation and inquiries will not have a material effect on Regions’ business, consolidated financial position, results of operations or cash flows as a whole. However, in the event of unexpected future developments, it is reasonably possible that an adverse outcome in any of the matters discussed above could be material to Regions’ business, consolidated financial position, results of operations or cash flows for any particular reporting period of occurrence. GUARANTEES FANNIE MAE DUS LOSS SHARE GUARANTEE Regions is a DUS lender. The DUS program provides liquidity to the multi-family housing market. Regions services loans sold to Fannie Mae and is required to provide a loss share guarantee equal to one-third for the majority of its DUS servicing portfolio. At March 31, 2021 and December 31, 2020, the Company's DUS servicing portfolio totaled approximately $4.6 billion and $4.5 billion, respectively. Regions' maximum quantifiable contingent liability related to its loss share guarantee was approximately $1.5 billion at both March 31, 2021 and December 31, 2020. The Company would be liable for this amount only if all of the loans it services for Fannie Mae, for which the Company retains some risk of loss, were to default and all of the collateral underlying these loans was determined to be without value at the time of settlement. Therefore, the maximum quantifiable contingent liability is not representative of the actual loss the Company would be expected to incur. The estimated fair value of the associated loss share guarantee recorded as a liability on the Company's consolidated balance sheets was approximately $5 million at both March 31, 2021 and December 31, 2020. Refer to Note 1 "Summary of Significant Accounting Policies" in the Annual Report on Form 10-K for the year ended December 31, 2020, for additional information.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements	NOTE 12. RECENT ACCOUNTING PRONOUNCEMENTS Standard Description Required Date of Adoption Effect on Regions' financial statements or other significant matters Standards Adopted (or partially adopted) in 2021 ASU 2019-12 Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes The amendments in this Update simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. January 1, 2021 The adoption of this guidance did not have a material impact. ASU 2020-01, Investments - Equity Securities (Topic 321), Investments - Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) The amendments clarify the interaction of the accounting for equity securities under Topic 321 and investments accounted for under the equity method of accounting in Topic 323 and the accounting for certain forward contracts and purchased options accounted for under Topic 815. January 1, 2021 The adoption of this guidance did not have a material impact. ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables—Nonrefundable Fees and Other Costs The amendments in this Update were issued to clarify that entities should reevaluate at each reporting period whether callable debt securities are within the scope of the guidance in Topic 310-20, which requires the premium on such debt securities to be amortized to the next call date. January 1, 2021 The adoption of this guidance did not have a material impact. ASU 2020-10, Codification Improvements This Update was issued to make minor technical corrections and improvements to the Codification as part of an ongoing FASB project to clarify guidance and correct inconsistent application of unclear guidance. The ASU codifies in Section 50 (Disclosure) of various Codification Topics the disclosure guidance that includes an option to provide certain information either on the face of the financial statements or in notes to the financial statements that was previously codified only in Section 45 (Other Presentation Matters). It also amends various Codification Topics to clarify guidance that may have been unclear when originally codified and that has resulted in inconsistent application. January 1, 2021 The adoption of this guidance did not have a material impact. ASU 2021-01 Reference Rate Reform (Topic 848) The Update was issued to clarify that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to contracts that are affected by the discounting transition. Specifically, certain provisions in Topic 848, if elected by an entity, would apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. Amendments in this ASU to the expedients and exceptions in Topic 848 are included to capture the incremental consequences of the scope refinement and to tailor the existing guidance to derivative instruments affected by the discounting transition. The Update is effective upon issuance and can be applied through December 31, 2022 The adoption of this guidance did not have a material impact. Standard Description Required Date of Adoption Effect on Regions' financial statements or other significant matters Standards Not Yet Adopted ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging— Contracts in Entity’s Own Equity (Subtopic 815-40) This Update simplifies accounting for convertible instruments by removing certain separation models. Additionally, it revises and clarifies guidance on the derivatives scope exception to make the exception easier to apply. January 1, 2022 Regions is evaluating the impact upon adoption; however, the impact is not expected to be material.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule Of Amortized Cost, Gross Unrealized Gains and Losses, And Estimated Fair Value Of Debt Securities Available For Sale And Debt Securities Held To Maturity	The amortized cost, gross unrealized gains and losses, and estimated fair value of debt securities held to maturity and debt securities available for sale are as follows: March 31, 2021 Recognized in OCI (1) Not Recognized in OCI Amortized Gross Unrealized Gains Gross Unrealized Losses Carrying Value Gross Gross Estimated (In millions) Debt securities held to maturity: Mortgage-backed securities: Residential agency $ 501 $ — $ (17) $ 484 $ 29 $ — $ 513 Commercial agency 576 — (1) 575 43 — 618 $ 1,077 $ — $ (18) $ 1,059 $ 72 $ — $ 1,131 Debt securities available for sale: U.S. Treasury securities $ 229 $ 4 $ (1) $ 232 $ 232 Federal agency securities 100 1 (3) 98 98 Mortgage-backed securities: Residential agency 18,563 458 (175) 18,846 18,846 Residential non-agency 1 — — 1 1 Commercial agency 6,038 219 (58) 6,199 6,199 Commercial non-agency 558 12 — 570 570 Corporate and other debt securities 1,090 56 — 1,146 1,146 $ 26,579 $ 750 $ (237) $ 27,092 $ 27,092 December 31, 2020 Recognized in OCI (1) Not Recognized in OCI Amortized Gross Unrealized Gains Gross Unrealized Losses Carrying Value Gross Gross Estimated (In millions) Debt securities held to maturity: Mortgage-backed securities: Residential agency $ 554 $ — $ (19) $ 535 $ 34 $ — $ 569 Commercial agency 589 — (2) 587 59 — 646 $ 1,143 $ — $ (21) $ 1,122 $ 93 $ — $ 1,215 Debt securities available for sale: U.S. Treasury securities $ 178 $ 5 $ — $ 183 $ 183 Federal agency securities 102 3 — 105 105 Mortgage-backed securities: Residential agency 18,455 625 (4) 19,076 19,076 Residential non-agency 1 — — 1 1 Commercial agency 5,659 346 (6) 5,999 5,999 Commercial non-agency 571 15 — 586 586 Corporate and other debt securities 1,126 78 — 1,204 1,204 $ 26,092 $ 1,072 $ (10) $ 27,154 $ 27,154 _________ (1) The gross unrealized losses recognized in OCI on securities held to maturity resulted from a transfer of securities available for sale to held to maturity in the second quarter of 2013.
Schedule Of Cost And Estimated Fair Value Of Debt Securities Available For Sale And Debt Securities Held To Maturity By Contractual Maturity	The amortized cost and estimated fair value of debt securities held to maturity and debt securities available for sale at March 31, 2021, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Estimated (In millions) Debt securities held to maturity: Mortgage-backed securities: Residential agency $ 501 $ 513 Commercial agency 576 618 $ 1,077 $ 1,131 Debt securities available for sale: Due in one year or less $ 268 $ 271 Due after one year through five years 756 793 Due after five years through ten years 285 303 Due after ten years 110 109 Mortgage-backed securities: Residential agency 18,563 18,846 Residential non-agency 1 1 Commercial agency 6,038 6,199 Commercial non-agency 558 570 $ 26,579 $ 27,092
Schedule Of Gross Unrealized Losses And Estimated Fair Value Of Debt Securities Available For Sale and Held to Maturity	The following tables present gross unrealized losses and the related estimated fair value of debt securities held to maturity and debt securities available for sale at March 31, 2021, and December 31, 2020. For debt securities transferred to held to maturity from available for sale, the analysis in the tables below is comparing the securities' original amortized cost to its current estimated fair value. These securities are segregated between investments that have been in a continuous unrealized loss position for less than twelve months and for twelve months or more. March 31, 2021 Less Than Twelve Months Twelve Months or More Total Estimated Gross Estimated Gross Estimated Gross (In millions) Debt securities available for sale: U.S. Treasury securities $ 62 $ (1) $ 2 $ — $ 64 $ (1) Federal agency securities 62 (3) — — 62 (3) Mortgage-backed securities: Residential agency $ 7,100 $ (175) $ 21 $ — $ 7,121 $ (175) Commercial agency 1,644 (58) 19 — 1,663 (58) $ 8,868 $ (237) $ 42 $ — $ 8,910 $ (237) December 31, 2020 Less Than Twelve Months Twelve Months or More Total Estimated Gross Estimated Gross Estimated Gross (In millions) Debt securities available for sale: Mortgage-backed securities: Residential agency $ 914 $ (4) $ 101 $ — $ 1,015 $ (4) Commercial agency 819 (6) — — 819 (6) $ 1,733 $ (10) $ 101 $ — $ 1,834 $ (10)

Loans and the Allowance for C_2

Loans and the Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	The following table presents the distribution of Regions' loan portfolio by segment and class, net of unearned income: March 31, 2021 December 31, 2020 (In millions) Commercial and industrial $ 43,241 $ 42,870 Commercial real estate mortgage—owner-occupied 5,335 5,405 Commercial real estate construction—owner-occupied 293 300 Total commercial 48,869 48,575 Commercial investor real estate mortgage 5,405 5,394 Commercial investor real estate construction 1,817 1,869 Total investor real estate 7,222 7,263 Residential first mortgage 16,643 16,575 Home equity lines 4,286 4,539 Home equity loans 2,631 2,713 Indirect—vehicles 768 934 Indirect—other consumer 2,262 2,431 Consumer credit card 1,111 1,213 Other consumer 963 1,023 Total consumer 28,664 29,428 Total loans, net of unearned income $ 84,755 $ 85,266
Analysis of the Allowance for Credit Losses by Portfolio Segment	The following tables present analyses of the allowance by portfolio segment for the three months ended March 31, 2021 and 2020. Three Months Ended March 31, 2021 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, January 1, 2021 $ 1,196 $ 183 $ 788 $ 2,167 Provision for (benefit from) loan losses (83) (18) (7) (108) Loan losses: Charge-offs (47) (15) (52) (114) Recoveries 16 — 15 31 Net loan (losses) recoveries (31) (15) (37) (83) Allowance for loan losses, March 31, 2021 1,082 150 744 1,976 Reserve for unfunded credit commitments, January 1, 2021 97 14 15 126 Provision for (benefit from) unfunded credit losses (30) (3) (1) (34) Reserve for unfunded credit commitments, March 31, 2021 67 11 14 92 Allowance for credit losses, March 31, 2021 $ 1,149 $ 161 $ 758 $ 2,068 Three Months Ended March 31, 2020 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, December 31, 2019 $ 537 $ 45 $ 287 $ 869 Cumulative change in accounting guidance (3) 7 434 438 Allowance for loan losses, January 1, 2020 (adjusted for change in accounting guidance) 534 52 721 1,307 Provision for loan losses 251 10 115 376 Loan losses: Charge-offs (71) — (73) (144) Recoveries 7 1 13 21 Net loan (losses) recoveries (64) 1 (60) (123) Allowance for loan losses, March 30, 2020 721 63 776 1,560 Reserve for unfunded credit commitments, December 31, 2019 41 4 — 45 Cumulative change in accounting guidance 36 13 14 63 Reserve for unfunded credit commitments, January 1, 2020 (adjusted for change in accounting guidance) 77 17 14 108 Provision for (benefit from) unfunded credit losses (4) 1 — (3) Reserve for unfunded credit commitments, March 30, 2020 73 18 14 105 Allowance for credit losses, March 31, 2020 $ 794 $ 81 $ 790 $ 1,665
Financing Receivable Credit Quality Indicators	The following tables present applicable credit quality indicators for the loan portfolio segments and classes, excluding loans held for sale, by vintage year as of March 31, 2021 and December 31, 2020. Classes in the commercial and investor real estate portfolio segments are disclosed by risk rating. Classes in the consumer portfolio segment are disclosed by current FICO scores. Refer to Note 6 "Allowance for Credit Losses" in the Annual Report on Form 10-K for the year ended December 31, 2020 for more information regarding Regions' credit quality indicators. March 31, 2021 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2021 2020 2019 2018 2017 Prior (In millions) Commercial and industrial: Risk Rating: Pass (2) $ 3,755 $ 10,495 $ 5,656 $ 3,182 $ 2,242 $ 3,367 $ 12,048 $ — $ (91) $ 40,654 Special Mention 6 91 252 302 $ 44 $ 54 560 — — 1,309 Substandard Accrual 16 39 80 118 $ 54 $ 8 537 — — 852 Non-accrual 18 36 57 91 $ 20 $ 33 171 — — 426 Total commercial and industrial $ 3,795 $ 10,661 $ 6,045 $ 3,693 $ 2,360 $ 3,462 $ 13,316 $ — $ (91) $ 43,241 Commercial real estate mortgage—owner-occupied: Risk Rating: Pass $ 312 $ 1,315 $ 841 $ 844 $ 512 $ 1,060 $ 137 $ — $ (4) $ 5,017 Special Mention 3 24 25 17 18 47 1 — — 135 Substandard Accrual — 4 45 12 12 16 1 — — 90 Non-accrual — 11 23 17 22 15 5 — — 93 Total commercial real estate mortgage—owner-occupied: $ 315 $ 1,354 $ 934 $ 890 $ 564 $ 1,138 $ 144 $ — $ (4) $ 5,335 Commercial real estate construction—owner-occupied: Risk Rating: Pass $ 3 $ 74 $ 63 $ 37 $ 23 $ 58 $ 8 $ — $ — $ 266 Special Mention — — — — 2 2 — — — 4 Substandard Accrual — 1 3 1 2 7 — — — 14 Non-accrual — — — — 1 8 — — — 9 Total commercial real estate construction—owner-occupied: $ 3 $ 75 $ 66 $ 38 $ 28 $ 75 $ 8 $ — $ — $ 293 Total commercial $ 4,113 $ 12,090 $ 7,045 $ 4,621 $ 2,952 $ 4,675 $ 13,468 $ — $ (95) $ 48,869 Commercial investor real estate mortgage: Risk Rating: Pass $ 396 $ 1,375 $ 1,168 $ 995 $ 245 $ 161 $ 315 $ — $ (6) $ 4,649 Special Mention 55 61 179 38 15 11 — — — 359 Substandard Accrual — 71 160 57 — 9 — — — 297 Non-accrual — — 38 — — 3 59 — — 100 Total commercial investor real estate mortgage $ 451 $ 1,507 $ 1,545 $ 1,090 $ 260 $ 184 $ 374 $ — $ (6) $ 5,405 March 31, 2021 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2021 2020 2019 2018 2017 Prior (In millions) Commercial investor real estate construction: Risk Rating: Pass $ 43 $ 253 $ 590 $ 191 $ 1 $ 2 $ 680 $ — $ (11) $ 1,749 Special Mention — — 32 32 — — 3 — — 67 Substandard Accrual — 1 — — — — — — — 1 Non-accrual — — — — — — — — — — Total commercial investor real estate construction $ 43 $ 254 $ 622 $ 223 $ 1 $ 2 $ 683 $ — $ (11) $ 1,817 Total investor real estate $ 494 $ 1,761 $ 2,167 $ 1,313 $ 261 $ 186 $ 1,057 $ — $ (17) $ 7,222 Residential first mortgage: FICO scores Above 720 $ 902 $ 5,602 $ 1,554 $ 695 $ 886 $ 3,558 $ — $ — $ — $ 13,197 681-720 118 475 155 90 91 453 — — — 1,382 620-680 45 200 103 65 67 445 — — — 925 Below 620 7 39 47 52 51 539 — — — 735 Data not available 14 56 24 10 14 135 9 — 142 404 Total residential first mortgage $ 1,086 $ 6,372 $ 1,883 $ 912 $ 1,109 $ 5,130 $ 9 $ — $ 142 $ 16,643 Home equity lines: FICO scores Above 720 $ — $ — $ — $ — $ — $ — $ 3,152 $ 46 $ — $ 3,198 681-720 — — — — — — 452 10 — 462 620-680 — — — — — — 297 12 — 309 Below 620 — — — — — — 173 8 — 181 Data not available — — — — — — 104 3 29 136 Total home equity lines $ — $ — $ — $ — $ — $ — $ 4,178 $ 79 $ 29 $ 4,286 Home equity loans FICO scores Above 720 $ 129 $ 406 $ 223 $ 205 $ 290 $ 804 $ — $ — $ — $ 2,057 681-720 20 48 35 30 36 102 — — — 271 620-680 7 19 16 16 21 82 — — — 161 Below 620 — 2 7 8 13 61 — — — 91 Data not available — 1 2 3 4 21 — — 20 51 Total home equity loans $ 156 $ 476 $ 283 $ 262 $ 364 $ 1,070 $ — $ — $ 20 $ 2,631 Indirect—vehicles: FICO scores Above 720 $ — $ — $ 16 $ 264 $ 114 $ 95 $ — $ — $ — $ 489 681-720 — — 4 43 19 17 — — — 83 620-680 — — 3 38 19 20 — — — 80 Below 620 — — 3 36 22 27 — — — 88 Data not available — — — 3 5 6 — — 14 28 Total indirect- vehicles $ — $ — $ 26 $ 384 $ 179 $ 165 $ — $ — $ 14 $ 768 March 31, 2021 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2021 2020 2019 2018 2017 Prior (In millions) Indirect—other consumer: FICO scores Above 720 $ — $ 365 $ 609 $ 345 $ 124 $ 80 $ — $ — $ — $ 1,523 681-720 — 53 151 99 37 23 — — — 363 620-680 — 12 64 55 23 15 — — — 169 Below 620 — 2 18 18 7 6 — — — 51 Data not available — 17 3 3 2 1 — — 130 156 Total indirect- other consumer $ — $ 449 $ 845 $ 520 $ 193 $ 125 $ — $ — $ 130 $ 2,262 Consumer credit card: FICO scores Above 720 $ — $ — $ — $ — $ — $ — $ 609 $ — $ — $ 609 681-720 — — — — — — 237 — — 237 620-680 — — — — — — 192 — — 192 Below 620 — — — — — — 79 — — 79 Data not available — — — — — — 8 — (14) (6) Total consumer credit card $ — $ — $ — $ — $ — $ — $ 1,125 $ — $ (14) $ 1,111 Other consumer: FICO scores Above 720 $ 56 $ 183 $ 136 $ 67 $ 22 $ 7 $ 110 $ — $ — $ 581 681-720 17 49 36 15 4 2 52 — — 175 620-680 11 30 22 9 3 1 38 — — 114 Below 620 2 9 9 5 1 1 17 — — 44 Data not available 43 1 — — — — 3 — 2 49 Total other consumer $ 129 $ 272 $ 203 $ 96 $ 30 $ 11 $ 220 $ — $ 2 $ 963 Total consumer loans $ 1,371 $ 7,569 $ 3,240 $ 2,174 $ 1,875 $ 6,501 $ 5,532 $ 79 $ 323 $ 28,664 Total Loans $ 5,978 $ 21,420 $ 12,452 $ 8,108 $ 5,088 $ 11,362 $ 20,057 $ 79 $ 211 $ 84,755 December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2020 2019 2018 2017 2016 Prior (In millions) Commercial and industrial: Risk Rating: Pass (2) $ 12,260 $ 6,115 $ 3,550 $ 2,413 $ 1,166 $ 2,493 $ 12,138 $ — $ (39) $ 40,096 Special Mention 133 250 376 84 5 48 722 — — 1,618 Substandard Accrual 41 50 78 55 20 4 490 — — 738 Non-accrual 42 59 97 20 23 19 158 — — 418 Total commercial and industrial $ 12,476 $ 6,474 $ 4,101 $ 2,572 $ 1,214 $ 2,564 $ 13,508 $ — $ (39) $ 42,870 December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2020 2019 2018 2017 2016 Prior (In millions) Commercial real estate mortgage—owner-occupied: Risk Rating: Pass $ 1,379 $ 882 $ 913 $ 547 $ 401 $ 801 $ 140 $ — $ (3) $ 5,060 Special Mention 18 31 23 22 10 44 6 — — 154 Substandard Accrual 3 38 16 16 4 15 2 — — 94 Non-accrual 14 23 19 21 6 14 — — — 97 Total commercial real estate mortgage—owner-occupied: $ 1,414 $ 974 $ 971 $ 606 $ 421 $ 874 $ 148 $ — $ (3) $ 5,405 Commercial real estate construction—owner-occupied: Risk Rating: Pass $ 61 $ 75 $ 39 $ 24 $ 24 $ 40 $ 9 $ — $ — $ 272 Special Mention 1 — — 2 2 — — — — 5 Substandard Accrual — 3 1 3 4 3 — — — 14 Non-accrual — — — 1 — 8 — — — 9 Total commercial real estate construction—owner-occupied: $ 62 $ 78 $ 40 $ 30 $ 30 $ 51 $ 9 $ — $ — $ 300 Total commercial $ 13,952 $ 7,526 $ 5,112 $ 3,208 $ 1,665 $ 3,489 $ 13,665 $ — $ (42) $ 48,575 Commercial investor real estate mortgage: Risk Rating: Pass $ 1,663 $ 1,243 $ 1,137 $ 252 $ 65 $ 162 $ 332 $ — $ (5) $ 4,849 Special Mention 5 77 76 15 — 7 — — — 180 Substandard Accrual 69 114 57 — 2 9 — — — 251 Non-accrual — 44 1 — — 1 68 — — 114 Total commercial investor real estate mortgage $ 1,737 $ 1,478 $ 1,271 $ 267 $ 67 $ 179 $ 400 $ — $ (5) $ 5,394 Commercial investor real estate construction: Risk Rating: Pass $ 224 $ 601 $ 266 $ 1 $ — $ 1 $ 679 $ — $ (11) $ 1,761 Special Mention 30 36 31 — — — 9 — — 106 Substandard Accrual 1 1 — — — — — — — 2 Non-accrual — — — — — — — — — — Total commercial investor real estate construction $ 255 $ 638 $ 297 $ 1 $ — $ 1 $ 688 $ — $ (11) $ 1,869 Total investor real estate $ 1,992 $ 2,116 $ 1,568 $ 268 $ 67 $ 180 $ 1,088 $ — $ (16) $ 7,263 Residential first mortgage: FICO scores Above 720 $ 5,564 $ 1,738 $ 809 $ 1,023 $ 1,279 $ 2,709 $ — $ — $ — $ 13,122 681-720 525 189 103 112 113 360 — — — 1,402 620-680 211 100 73 64 67 404 — — — 919 Below 620 31 44 50 51 60 499 — — — 735 Data not available 52 23 13 16 15 126 10 — 142 397 Total residential first mortgage $ 6,383 $ 2,094 $ 1,048 $ 1,266 $ 1,534 $ 4,098 $ 10 $ — $ 142 $ 16,575 December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2020 2019 2018 2017 2016 Prior (In millions) Home equity lines: FICO scores Above 720 $ — $ — $ — $ — $ — $ — $ 3,334 $ 45 $ — $ 3,379 681-720 — — — — — — 492 10 — 502 620-680 — — — — — — 319 11 — 330 Below 620 — — — — — — 181 7 — 188 Data not available — — — — — — 107 3 30 140 Total home equity lines $ — $ — $ — $ — $ — $ — $ 4,433 $ 76 $ 30 $ 4,539 Home equity loans FICO scores Above 720 $ 417 $ 251 $ 233 $ 325 $ 304 $ 580 $ — $ — $ — $ 2,110 681-720 57 40 35 39 37 76 — — — 284 620-680 21 17 19 22 25 65 — — — 169 Below 620 2 7 9 13 15 52 — — — 98 Data not available 1 2 2 4 5 17 — — 21 52 Total home equity loans $ 498 $ 317 $ 298 $ 403 $ 386 $ 790 $ — $ — $ 21 $ 2,713 Indirect—vehicles: FICO scores Above 720 $ — $ 18 $ 305 $ 137 $ 92 $ 40 $ — $ — $ — $ 592 681-720 — 5 50 22 16 8 — — — 101 620-680 — 4 44 23 18 8 — — — 97 Below 620 — 3 42 26 24 14 — — — 109 Data not available — — 4 6 4 4 — — 17 35 Total indirect- vehicles $ — $ 30 $ 445 $ 214 $ 154 $ 74 $ — $ — $ 17 $ 934 Indirect—other consumer: FICO scores Above 720 $ 297 $ 721 $ 392 $ 138 $ 60 $ 31 $ — $ — $ — $ 1,639 681-720 39 173 116 41 18 9 — — — 396 620-680 9 73 63 27 12 6 — — — 190 Below 620 1 22 22 9 5 2 — — — 61 Data not available — 3 3 2 1 1 — — 135 145 Total indirect- other consumer $ 346 $ 992 $ 596 $ 217 $ 96 $ 49 $ — $ — $ 135 $ 2,431 Consumer credit card: FICO scores Above 720 $ — $ — $ — $ — $ — $ — $ 667 $ — $ — $ 667 681-720 — — — — — — 255 — — 255 620-680 — — — — — — 208 — — 208 Below 620 — — — — — — 91 — — 91 Data not available — — — — — — 7 — (15) (8) Total consumer credit card $ — $ — $ — $ — $ — $ — $ 1,228 $ — $ (15) $ 1,213 December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Amortizing Unallocated (1) Total Origination Year 2020 2019 2018 2017 2016 Prior (In millions) Other consumer: FICO scores Above 720 $ 209 $ 163 $ 84 $ 30 $ 7 $ 3 $ 117 $ — $ — $ 613 681-720 61 44 20 5 1 1 52 — — 184 620-680 34 28 13 4 1 1 42 — — 123 Below 620 11 11 6 3 1 — 19 — — 51 Data not available 46 1 — — — — 3 — 2 52 Total other consumer $ 361 $ 247 $ 123 $ 42 $ 10 $ 5 $ 233 $ — $ 2 $ 1,023 Total consumer loans $ 7,588 $ 3,680 $ 2,510 $ 2,142 $ 2,180 $ 5,016 $ 5,904 $ 76 $ 332 $ 29,428 Total Loans $ 23,532 $ 13,322 $ 9,190 $ 5,618 $ 3,912 $ 8,685 $ 20,657 $ 76 $ 274 $ 85,266 _________ (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. (2) Commercial and Industrial lending includes PPP lending in the 2020 and 2021 vintage years.
Past Due Financing Receivables	The following tables include an aging analysis of DPD and loans on non-accrual status for each portfolio segment and class as of March 31, 2021 and December 31, 2020. Loans on non-accrual status with no related allowance included $105 million and $112 million of commercial and industrial loans as of March 31, 2021 and December 31, 2020, respectively. Non–accrual loans with no related allowance typically include loans where the underlying collateral is deemed sufficient to recover all remaining principal. Loans that have been fully charged-off do not appear in the tables below. March 31, 2021 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total Total Non-accrual Total (In millions) Commercial and industrial $ 27 $ 15 $ 8 $ 50 $ 42,815 $ 426 $ 43,241 Commercial real estate mortgage—owner-occupied 7 2 1 10 5,242 93 5,335 Commercial real estate construction—owner-occupied 1 — — 1 284 9 293 Total commercial 35 17 9 61 48,341 528 48,869 Commercial investor real estate mortgage 1 1 — 2 5,305 100 5,405 Commercial investor real estate construction 1 — — 1 1,817 — 1,817 Total investor real estate 2 1 — 3 7,122 100 7,222 Residential first mortgage 82 38 138 258 16,590 53 16,643 Home equity lines 14 8 19 41 4,238 48 4,286 Home equity loans 9 3 14 26 2,622 9 2,631 Indirect—vehicles 9 2 3 14 768 — 768 Indirect—other consumer 7 7 4 18 2,262 — 2,262 Consumer credit card 7 5 14 26 1,111 — 1,111 Other consumer 7 3 4 14 963 — 963 Total consumer 135 66 196 397 28,554 110 28,664 $ 172 $ 84 $ 205 $ 461 $ 84,017 $ 738 $ 84,755 December 31, 2020 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total Total Non-accrual Total (In millions) Commercial and industrial $ 37 $ 22 $ 7 $ 66 $ 42,452 $ 418 $ 42,870 Commercial real estate mortgage—owner-occupied 4 1 1 6 5,308 97 5,405 Commercial real estate construction—owner-occupied 1 — — 1 291 9 300 Total commercial 42 23 8 73 48,051 524 48,575 Commercial investor real estate mortgage 3 — — 3 5,280 114 5,394 Commercial investor real estate construction — — — — 1,869 — 1,869 Total investor real estate 3 — — 3 7,149 114 7,263 Residential first mortgage 104 41 156 301 16,522 53 16,575 Home equity lines 24 11 19 54 4,493 46 4,539 Home equity loans 10 7 13 30 2,705 8 2,713 Indirect—vehicles 15 4 4 23 934 — 934 Indirect—other consumer 12 8 5 25 2,431 — 2,431 Consumer credit card 8 6 14 28 1,213 — 1,213 Other consumer 12 3 2 17 1,023 — 1,023 Total consumer 185 80 213 478 29,321 107 29,428 $ 230 $ 103 $ 221 $ 554 $ 84,521 $ 745 $ 85,266
Troubled Debt Restructurings on Financing Receivables	The following tables present the end of period balance for loans modified in a TDR during the periods presented by portfolio segment and class, and the financial impact of those modifications. The tables include modifications made to new TDRs, as well as renewals of existing TDRs. Three Months Ended March 31, 2021 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 26 $ 30 $ — Commercial real estate mortgage—owner-occupied 6 1 — Commercial real estate construction—owner-occupied — — — Total commercial 32 31 — Commercial investor real estate mortgage 2 7 — Commercial investor real estate construction — — — Total investor real estate 2 7 — Residential first mortgage 175 35 3 Home equity lines 2 — — Home equity loans 1 — — Consumer credit card — — — Indirect—vehicles and other consumer 48 1 — Total consumer 226 36 3 260 $ 74 $ 3 Three Months Ended March 31, 2020 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 26 $ 74 $ — Commercial real estate mortgage—owner-occupied 5 2 — Commercial real estate construction—owner-occupied 1 1 — Total commercial 32 77 — Commercial investor real estate mortgage 4 1 — Commercial investor real estate construction 1 — — Total investor real estate 5 1 — Residential first mortgage 52 7 1 Home equity lines — — — Home equity loans 15 1 — Consumer credit card 10 — — Indirect—vehicles and other consumer 10 — — Total consumer 87 8 1 124 $ 86 $ 1

Servicing of Financial Assets (

Servicing of Financial Assets (Tables)	3 Months Ended
	Mar. 31, 2021
Transfers and Servicing of Financial Assets [Abstract]
Schedule of Residential Mortgage Servicing Rights Under The Fair Value Measurement Method	The table below presents an analysis of residential MSRs under the fair value measurement method: Three Months Ended March 31 2021 2020 (In millions) Carrying value, beginning of period $ 296 $ 345 Additions 32 11 Increase (decrease) in fair value: Due to change in valuation inputs or assumptions 90 (83) Economic amortization associated with borrower repayments (1) (17) (19) Carrying value, end of period $ 401 $ 254 ________ (1) "Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns. Regions' MSR decay methodology is a discounted net cash flow approach.
Data And Assumptions Used In The Fair Value Calculation As Well As The Valuation's Sensitivity To Rate Fluctuations Related To Residential Mortgage Servicing Rights	Data and assumptions used in the fair value calculation, as well as the valuation’s sensitivity to rate fluctuations, related to residential MSRs (excluding related derivative instruments) are as follows: March 31 2021 2020 (Dollars in millions) Unpaid principal balance $ 34,212 $ 33,787 Weighted-average CPR (%) 10.2 % 18.1 % Estimated impact on fair value of a 10% increase $ (28) $ (26) Estimated impact on fair value of a 20% increase $ (51) $ (49) Option-adjusted spread (basis points) 564 629 Estimated impact on fair value of a 10% increase $ (10) $ (5) Estimated impact on fair value of a 20% increase $ (21) $ (10) Weighted-average coupon interest rate 3.8 % 4.2 % Weighted-average remaining maturity (months) 289 278 Weighted-average servicing fee (basis points) 27.5 27.4
Schedule Of Fees Resulting From The Servicing Of Residential Mortgage Loans	The following table presents servicing related fees, which includes contractually specified servicing fees, late fees and other ancillary income resulting from the servicing of residential mortgage loans: Three Months Ended March 31 2021 2020 (In millions) Servicing related fees and other ancillary income $ 24 $ 25
Servicing Asset at Amortized Cost	The table below presents an analysis of commercial MSRs under the amortization measurement method: Three Months Ended March 31 2021 2020 (In millions) Carrying value, beginning of period $ 74 $ 59 Additions 11 3 Economic amortization associated with borrower repayments (1) (3) (3) Carrying value, end of period $ 82 $ 59 ________ (1) "Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns.
Servicing related fee for Commercial Mortgage Banking	The following table presents servicing related fees, which includes contractually specified servicing fees, late fees and other ancillary income resulting from the servicing of commercial mortgage loans: Three Months Ended March 31 2021 2020 (In millions) Servicing related fees and other ancillary income $ 5 $ 5

Stockholders' Equity and Accu_2

Stockholders' Equity and Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Summary of the non-cumulative perpetual preferred stock	The following table presents a summary of the non-cumulative perpetual preferred stock: March 31, 2021 December 31, 2020 Issuance Date Earliest Redemption Date Dividend Rate (1) Liquidation Amount Liquidation Preference per Share Liquidation preference per Depositary Share Ownership Interest per Depositary Share Carrying Amount Carrying Amount (Dollars in millions, except per share data) Series A 11/1/2012 12/15/2017 6.375 % $ 500 $ 1,000 $ 25 1/40th $ 387 $ 387 Series B 4/29/2014 9/15/2024 6.375 % (2) 500 1,000 25 1/40th 433 433 Series C 4/30/2019 5/15/2029 5.700 % (3) 500 1,000 25 1/40th 490 490 Series D 6/5/2020 9/15/2025 5.750 % (4) 350 100,000 1,000 1/100th 346 346 $ 1,850 $ 1,656 $ 1,656 _________ (1) Dividends on all series of preferred stock, if declared, accrue and are payable quarterly in arrears. (2) Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2024, 6.375%, and (ii) for each period beginning on or after September 15, 2024, three-month LIBOR plus 3.536%. (3) Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to August 15, 2029, 5.700%, and (ii) for each period beginning on or after August 15, 2029, three-month LIBOR plus 3.148%.
Schedule of Accumulated Other Comprehensive Income (Loss)	The following tables present the balances and activity in AOCI on a pre-tax and net of tax basis for the three months ended March 31, 2021 and 2020: Three Months Ended March 31, 2021 Pre-tax AOCI Activity Tax Effect (1) Net AOCI Activity (In millions) Total accumulated other comprehensive income, beginning of period $ 1,759 $ (444) $ 1,315 Unrealized losses on securities transferred to held to maturity: Beginning balance $ (21) $ 5 $ (16) Reclassification adjustments for amortization of unrealized losses (2) 3 (1) 2 Ending balance $ (18) $ 4 $ (14) Unrealized gains (losses) on securities available for sale: Beginning balance $ 1,062 $ (268) $ 794 Unrealized gains (losses) arising during the period (548) 138 (410) Reclassification adjustments for securities (gains) losses realized in net income (loss) (3) (1) — (1) Change in AOCI from securities available for sale activity in the period (549) 138 (411) Ending balance $ 513 $ (130) $ 383 Unrealized gains (losses) on derivative instruments designated as cash flow hedges: Beginning balance $ 1,610 $ (406) $ 1,204 Unrealized holding gains (losses) on derivatives arising during the period (331) 83 (248) Reclassification adjustments for (gains) losses realized in net income (2) (102) 26 (76) Change in AOCI from derivative activity in the period (433) 109 (324) Ending balance $ 1,177 $ (297) $ 880 Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (892) $ 225 $ (667) Reclassification adjustments for amortization of actuarial gains (losses) and settlements realized in net income (4) 13 (3) 10 Ending balance $ (879) $ 222 $ (657) Total other comprehensive income (966) 243 (723) Total accumulated other comprehensive income, end of period $ 793 $ (201) $ 592 Three Months Ended March 31, 2020 Pre-tax AOCI Activity Tax Effect (1) Net AOCI Activity (In millions) Total accumulated other comprehensive income (loss), beginning of period $ (120) $ 30 $ (90) Unrealized losses on securities transferred to held to maturity: Beginning balance $ (29) $ 7 $ (22) Reclassification adjustments for amortization of unrealized losses (2) 1 — 1 Ending balance $ (28) $ 7 $ (21) Unrealized gains (losses) on securities available for sale: Beginning balance $ 274 $ (69) $ 205 Unrealized gains (losses) arising during the period 597 (151) 446 Ending balance $ 871 $ (220) $ 651 Unrealized gains (losses) on derivative instruments designated as cash flow hedges: Beginning balance $ 430 $ (108) $ 322 Unrealized holding gains (losses) on derivatives arising during the period 1,291 (325) 966 Reclassification adjustments for (gains) losses realized in income (2) (9) 2 (7) Change in AOCI from derivative activity in the period 1,282 (323) 959 Ending balance $ 1,712 $ (431) $ 1,281 Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (795) $ 200 $ (595) Reclassification adjustments for amortization of actuarial gains (losses) and settlements realized in net income (4) 11 (3) 8 Ending balance $ (784) $ 197 $ (587) Total other comprehensive income 1,891 (477) 1,414 Total accumulated other comprehensive income, end of period $ 1,771 $ (447) $ 1,324 _________ (1) The impact of all AOCI activity is shown net of the related tax impact, calculated using an effective tax rate of approximately 25%. (2) Reclassification amount is recognized in net interest income in the consolidated statements of income. (3) Reclassification amount is recognized in securities gains (losses), net in the consolidated statements of income. (4) Reclassification amount is recognized in other non-interest expense in the consolidated statements of income. Additionally, these accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost (see Note 7 for additional details).

Earnings (Loss) Per Common Sh_2

Earnings (Loss) Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic earnings per common share and diluted earnings per common share: Three Months Ended March 31 2021 2020 (In millions, except per share amounts) Numerator: Net income $ 642 $ 162 Preferred stock dividends (28) (23) Net income available to common shareholders $ 614 $ 139 Denominator: Weighted-average common shares outstanding—basic 961 957 Potential common shares 7 4 Weighted-average common shares outstanding—diluted 968 961 Earnings per common share: Basic $ 0.64 $ 0.15 Diluted 0.63 0.14

Pension and Other Postretirem_2

Pension and Other Postretirement Benefits (Tables)	3 Months Ended
	Mar. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Schedule of Net Periodic Pension Cost	Net periodic pension cost (credit) includes the following components: Qualified Plans Non-qualified Plans Total Three Months Ended March 31 2021 2020 2021 2020 2021 2020 (In millions) Service cost $ 9 $ 9 $ 1 $ 1 $ 10 $ 10 Interest cost 12 16 1 1 13 17 Expected return on plan assets (35) (37) — — (35) (37) Amortization of actuarial loss 11 9 2 2 13 11 Net periodic pension cost (credit) $ (3) $ (3) $ 4 $ 4 $ 1 $ 1

Derivative Financial Instrume_2

Derivative Financial Instruments and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of Derivative Instruments Notional And Fair Values	The following tables present the notional amount and estimated fair value of derivative instruments on a gross basis. March 31, 2021 December 31, 2020 Notional Estimated Fair Value Notional Estimated Fair Value Gain (1) Loss (1) Gain (1) Loss (1) (In millions) Derivatives in fair value hedging relationships: Interest rate swaps $ 1,750 $ 59 $ 13 $ 2,100 $ 77 $ — Derivatives in cash flow hedging relationships: Interest rate swaps (2) 18,000 $ 762 $ 2 16,000 1,181 — Interest rate floors (3)(4) 3,750 $ 226 $ — 5,750 430 — Total derivatives in cash flow hedging relationships 21,750 $ 988 $ 2 21,750 1,611 — Total derivatives designated as hedging instruments $ 23,500 $ 1,047 $ 15 $ 23,850 $ 1,688 $ — Derivatives not designated as hedging instruments: Interest rate swaps $ 77,082 $ 1,057 $ 1,107 $ 76,764 $ 1,492 $ 1,464 Interest rate options 15,776 $ 75 $ 25 13,806 90 28 Interest rate futures and forward commitments 3,810 $ 38 $ 6 4,270 11 26 Other contracts 9,181 $ 83 $ 80 9,924 68 80 Total derivatives not designated as hedging instruments $ 105,849 $ 1,253 $ 1,218 $ 104,764 $ 1,661 $ 1,598 Total derivatives $ 129,349 $ 2,300 $ 1,233 $ 128,614 $ 3,349 $ 1,598 Total gross derivative instruments, before netting $ 2,300 $ 1,233 $ 3,349 $ 1,598 Less: Netting adjustments (5) $ 1,686 $ 1,148 2,428 1,545 Total gross derivative instruments, after netting (6) $ 614 $ 85 $ 921 $ 53 _________ (1) Derivatives in a gain position are recorded as other assets and derivatives in a loss position are recorded as other liabilities on the consolidated balance sheets. (2) Includes accrued interest of $28 million at March 31, 2021 and December 31, 2020, respectively. (3) Includes accrued interest of $9 million at March 31, 2021 and $12 million at December 31, 2020. (4) Estimated fair value includes premium of approximately $51 million as of March 31, 2021 and $83 million as of December 31, 2020 to be amortized over the remaining life. Approximately $29 million of the decrease since December 31, 2020 related to hedges that were terminated during the first quarter of 2021 and were not amortized into earnings as of the date of termination. (5) Netting adjustments represent amounts recorded to convert derivative assets and derivative liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of cash collateral received or posted, legally enforceable master netting agreements and variation margin that allow Regions to settle derivative contracts with the counterparty on a net basis and to offset the net position with the related cash collateral.
Schedule of Discontinued Cash Flow Hedges	The following table presents the pre-tax impact of terminated cash flow hedges on AOCI. The balance of terminated cash flow hedges in AOCI will be amortized into earnings through 2025. Three Months Ended March 31 2021 2020 (In millions) Unrealized gains on terminated hedges included in AOCI- January 1 $ 121 $ 78 Unrealized gains (losses) on terminated hedges arising during the period 166 (6) Reclassification adjustments for amortization of unrealized (gains) into net income (8) (2) Unrealized gains on terminated hedges included in AOCI-March 31 $ 279 $ 70
Schedule Of Effect Of Hedging Derivative Instruments On Statements Of Operations	The following tables present the effect of hedging derivative instruments on the consolidated statements of income and the total amounts for the respective line items effected: Three Months Ended March 31, 2021 Interest Income Interest Expense Loans, Including Fees Long-term Borrowings (In millions) Total amounts presented in the consolidated statements of income $ 854 $ 27 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ — $ 7 Recognized on derivatives — (22) Recognized on hedged items — 22 Net income recognized on fair value hedges $ — $ 7 Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ 102 $ — Income (expense) recognized on cash flow hedges $ 102 $ — Three Months Ended March 31, 2020 Interest Income Interest Expense Loans, Including Fees Long-term Borrowings (In millions) Total amounts presented in the consolidated statements of income $ 903 $ 59 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ — $ 4 Recognized on derivatives — 77 Recognized on hedged items — (76) Net income recognized on fair value hedges $ — $ 5 Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ 9 $ — Income (expense) recognized on cash flow hedges $ 9 $ — ___ (1) See Note 5 for gain or (loss) recognized for cash flow hedges in AOCI.
Schedule of Fair Value Hedging Basis Adjustments	The following tables present the carrying amount and associated cumulative basis adjustment related to the application of hedge accounting that is included in the carrying amount of hedged assets and liabilities in fair value hedging relationships. March 31, 2021 December 31, 2020 Hedged Items Currently Designated Hedged Items Currently Designated Carrying Amount of Assets/(Liabilities) Hedge Accounting Basis Adjustment Carrying Amount of Assets/(Liabilities) Hedge Accounting Basis Adjustment (In millions) Long-term borrowings $ (1,790) $ (42) $ (2,171) $ (64)
Schedule of Gains (Losses) Recognized Related to Derivatives Not Designated as Hedging Instruments	The following table presents the location and amount of gain or (loss) recognized in income on derivatives not designated as hedging instruments in the consolidated statements of income for the periods presented below: Three Months Ended March 31 Derivatives Not Designated as Hedging Instruments 2021 2020 (In millions) Capital markets income: Interest rate swaps $ 23 $ (37) Interest rate options 15 16 Interest rate futures and forward commitments 9 5 Other contracts 5 (10) Total capital markets income 52 (26) Mortgage income: Interest rate swaps (67) 98 Interest rate options (13) 24 Interest rate futures and forward commitments 30 (16) Total mortgage income (50) 106 $ 2 $ 80

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule Of Assets And Liabilities At Fair Value Measured On A Recurring Basis And Non-Recurring Basis	The following table presents assets and liabilities measured at estimated fair value on a recurring basis and non-recurring basis: March 31, 2021 December 31, 2020 Level 1 Level 2 Level 3 (1) Total Estimated Fair Value Level 1 Level 2 Level 3 (1) Total Estimated Fair Value (In millions) Recurring fair value measurements Debt securities available for sale: U.S. Treasury securities $ 232 $ — $ — $ 232 $ 183 $ — $ — $ 183 Federal agency securities — 98 — 98 — 105 — 105 Mortgage-backed securities (MBS): Residential agency — 18,846 — 18,846 — 19,076 — 19,076 Residential non-agency — — 1 1 — — 1 1 Commercial agency — 6,199 — 6,199 — 5,999 — 5,999 Commercial non-agency — 570 — 570 — 586 — 586 Corporate and other debt securities — 1,142 4 1,146 — 1,200 4 1,204 Total debt securities available for sale $ 232 $ 26,855 $ 5 $ 27,092 $ 183 $ 26,966 $ 5 $ 27,154 Loans held for sale $ — $ 1,169 $ — $ 1,169 $ — $ 1,446 $ — $ 1,446 Marketable equity securities $ 443 $ — $ — $ 443 $ 388 $ — $ — $ 388 Residential mortgage servicing rights $ — $ — $ 401 $ 401 $ — $ — $ 296 $ 296 Derivative assets (2) : Interest rate swaps $ — $ 1,878 $ — $ 1,878 $ — $ 2,750 $ — $ 2,750 Interest rate options — 270 31 301 — 477 43 520 Interest rate futures and forward commitments — 38 — 38 — 11 — 11 Other contracts 1 82 — 83 2 65 1 68 Total derivative assets $ 1 $ 2,268 $ 31 $ 2,300 $ 2 $ 3,303 $ 44 $ 3,349 Equity investments $ — $ — $ — $ — $ — $ 74 $ — $ 74 Derivative liabilities (2) : Interest rate swaps $ — $ 1,122 $ — $ 1,122 $ — $ 1,464 $ — $ 1,464 Interest rate options — 25 — 25 — 28 — 28 Interest rate futures and forward commitments — 6 — 6 — 26 — 26 Other contracts 1 75 4 80 2 72 6 80 Total derivative liabilities $ 1 $ 1,228 $ 4 $ 1,233 $ 2 $ 1,590 $ 6 $ 1,598 Non-recurring fair value measurements Loans held for sale $ — $ — $ 8 $ 8 $ — $ — $ 4 $ 4 Equity investments without a readily determinable fair value — — — — — — 12 12 Foreclosed property and other real estate — — 16 16 — — 5 5 _________ (1) All following disclosures related to Level 3 recurring and non-recurring assets do not include those deemed to be immaterial.
Rollforward For Assets And Liabilities Measured At Fair Value On A Recurring Basis With Level 3 Significant Unobservable Inputs	The following tables illustrate rollforwards for residential mortgage servicing rights, which are the only material assets or liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2021 and 2020, respectively. Residential mortgage servicing rights Three Months Ended March 31 2021 2020 (In millions) Carrying value, beginning of period $ 296 $ 345 Total realized/unrealized gains (losses) included in earnings (1) 73 (102) Purchases 32 11 Carrying value, end of period $ 401 $ 254 _________ (1) Included in mortgage income. Amounts presented exclude offsetting impact from related derivatives.
Schedule Of Fair Value Adjustments Related To Non-Recurring Fair Value Measurements	The following table presents the fair value adjustments related to non-recurring fair value measurements: Three Months Ended March 31 2021 2020 (In millions) Loans held for sale $ (3) $ (3) Equity investments without a readily determinable fair value — (3) Foreclosed property and other real estate (7) (9)
Summary Of Quantitative Information About Level 3 Measurements	The following tables present detailed information regarding material assets and liabilities measured at fair value using significant unobservable inputs (Level 3) as of March 31, 2021, and December 31, 2020. The tables include the valuation techniques and the significant unobservable inputs utilized. The range of each significant unobservable input as well as the weighted-average within the range utilized at March 31, 2021, and December 31, 2020, are included. Following the tables are descriptions of the valuation techniques and the sensitivity of the techniques to changes in the significant unobservable inputs. March 31, 2021 Level 3 Estimated Fair Value at March 31, 2021 Valuation Unobservable Quantitative Range of (Dollars in millions) Recurring fair value measurements: Residential mortgage servicing rights (1) $401 Discounted cash flow Weighted-average CPR (%) 5.4% - 21.9% (10.2%) OAS (%) 4.8% - 9.5% (5.6%) _________ (1) See Note 4 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights. December 31, 2020 Level 3 Estimated Fair Value at December 31, 2020 Valuation Unobservable Quantitative Range of (Dollars in millions) Recurring fair value measurements: Residential mortgage servicing rights (1) $296 Discounted cash flow Weighted-average CPR (%) 8.1% - 31.2% (15.6%) OAS (%) 4.8% - 9.5% (5.6%) _________ (1) See Note 7 to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2020 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights.
Fair Value Option, Fair Value and Unpaid Principal Balance	The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for mortgage loans held for sale measured at fair value: March 31, 2021 December 31, 2020 Aggregate Aggregate Aggregate Fair Aggregate Aggregate Aggregate Fair (In millions) Mortgage loans held for sale, at fair value $ 1,163 $ 1,136 $ 27 $ 1,439 $ 1,362 $ 77 Interest income on mortgage loans held for sale is recognized based on contractual rates and is reflected in interest income on loans held for sale in the consolidated statements of income. The following table details net gains and losses resulting from changes in fair value of these loans, which were recorded in mortgage income in the consolidated statements of income during the three months ended March 31, 2021 and 2020. These changes in fair value are mostly offset by economic hedging activities. An immaterial portion of these amounts was attributable to changes in instrument-specific credit risk. Three Months Ended March 31 2021 2020 (In millions) Net gains (losses) resulting for the change in fair value of mortgage loans held for sale $ (50) $ 10
Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments	The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments as of March 31, 2021 are as follows: March 31, 2021 Carrying Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 24,920 $ 24,920 $ 24,920 $ — $ — Debt securities held to maturity 1,059 1,131 — 1,131 — Debt securities available for sale 27,092 27,092 232 26,855 5 Loans held for sale 1,487 1,487 — 1,479 8 Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 81,335 82,156 — — 82,156 Other earning assets (4) 1,074 1,074 443 631 — Derivative assets 2,300 2,300 1 2,268 31 Financial liabilities: Derivative liabilities 1,233 1,233 1 1,228 4 Deposits 129,602 129,624 — 129,624 — Long-term borrowings 2,916 3,351 — 3,086 265 Loan commitments and letters of credit 119 119 — — 119 _________ (1) Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company makes adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. (2) The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. The fair value premium on the loan portfolio's net carrying amount at March 31, 2021 was $821 million or 1.0 percent. (3) Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.4 billion at March 31, 2021. (4) Excluded from this table is the operating lease carrying amount of $188 million at March 31, 2021 . The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company's financial instruments as of December 31, 2020 are as follows: December 31, 2020 Carrying Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 17,956 $ 17,956 $ 17,956 $ — $ — Debt securities held to maturity 1,122 1,215 — 1,215 — Debt securities available for sale 27,154 27,154 183 26,966 5 Loans held for sale 1,905 1,905 — 1,901 4 Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 81,597 82,773 — — 82,773 Other earning assets (4) 1,017 1,017 388 629 — Derivative assets 3,349 3,349 2 3,303 44 Equity investments 74 74 — 74 — Financial liabilities: Derivative liabilities 1,598 1,598 2 1,590 6 Deposits 122,479 122,511 — 122,511 — Long-term borrowings 3,569 4,063 — 3,592 471 Loan commitments and letters of credit 151 151 — — 151 _________ (1) Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company makes adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. (2) The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. The fair value premium on the loan portfolio's net carrying amount at December 31, 2020 was $1.2 billion or 1.4 percent. (3) Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.5 billion at December 31, 2020. (4) Excluded from this table is the operating lease carrying amount of $200 million at December 31, 2020.

Business Segment Information (T

Business Segment Information (Tables)	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Schedule Of Financial Information By Reportable Segment	The following tables present financial information for each reportable segment for the period indicated. Three Months Ended March 31, 2021 Corporate Bank Consumer Wealth Other Consolidated (In millions) Net interest income $ 435 $ 497 $ 35 $ — $ 967 Provision for (benefit from) credit losses 79 73 3 (297) (142) Non-interest income 193 331 92 25 641 Non-interest expense 267 529 94 38 928 Income (loss) before income taxes 282 226 30 284 822 Income tax expense (benefit) 70 57 7 46 180 Net income (loss) $ 212 $ 169 $ 23 $ 238 $ 642 Average assets $ 59,492 $ 34,053 $ 2,047 $ 50,962 $ 146,554 Three Months Ended March 31, 2020 Corporate Bank Consumer Bank Wealth Other Consolidated (In millions) Net interest income $ 352 $ 538 $ 38 $ — $ 928 Provision for credit losses 53 88 4 228 373 Non-interest income (loss) 104 315 87 (21) 485 Non-interest expense 235 499 87 15 836 Income (loss) before income taxes 168 266 34 (264) 204 Income tax expense (benefit) 42 67 9 (76) 42 Net income (loss) $ 126 $ 199 $ 25 $ (188) $ 162 Average assets $ 55,085 $ 34,600 $ 2,060 $ 33,026 $ 124,771

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Credit Risk Of Off-Balance Sheet Financial Instruments By Contractual Amounts	Credit risk associated with these instruments is represented by the contractual amounts indicated in the following table: March 31, 2021 December 31, 2020 (In millions) Unused commitments to extend credit $ 59,377 $ 56,644 Standby letters of credit 1,660 1,742 Commercial letters of credit 72 132 Liabilities associated with standby letters of credit 27 25 Assets associated with standby letters of credit 27 25 Reserve for unfunded credit commitments 92 126

Securities (Schedule Of Amortiz

Securities (Schedule Of Amortized Cost, Gross Unrealized Gains And Losses, And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities held to maturity, amortized cost		$ 1,077	$ 1,143
Held To Maturity Debt Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Debt Securities Gross Unrealized Losses	[1]	(18)	(21)
Debt Securities held to maturity		1,059	1,122
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain		72	93
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss		0	0
Debt Securities held to maturity, estimated fair value		1,131	1,215
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		26,579	26,092
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		750	1,072
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		(237)	(10)
Available-for-sale debt securities, net carrying value		27,092	27,154
Debt securities available for sale		27,092	27,154
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		229	178
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		4	5
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		(1)	0
Available-for-sale debt securities, net carrying value		232	183
Debt securities available for sale		232	183
Federal Agency Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		100	102
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		1	3
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		(3)	0
Available-for-sale debt securities, net carrying value		98	105
Debt securities available for sale		98	105
Residential Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities held to maturity, amortized cost		501	554
Held To Maturity Debt Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Debt Securities Gross Unrealized Losses	[1]	(17)	(19)
Debt Securities held to maturity		484	535
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain		29	34
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss		0	0
Debt Securities held to maturity, estimated fair value		513	569
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		18,563	18,455
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		458	625
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		(175)	(4)
Available-for-sale debt securities, net carrying value		18,846	19,076
Debt securities available for sale		18,846	19,076
Residential Non-Agency [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		1	1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		0	0
Available-for-sale debt securities, net carrying value		1	1
Debt securities available for sale		1	1
Commercial Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities held to maturity, amortized cost		576	589
Held To Maturity Debt Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Debt Securities Gross Unrealized Losses	[1]	(1)	(2)
Debt Securities held to maturity		575	587
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain		43	59
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss		0	0
Debt Securities held to maturity, estimated fair value		618	646
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		6,038	5,659
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		219	346
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		(58)	(6)
Available-for-sale debt securities, net carrying value		6,199	5,999
Debt securities available for sale		6,199	5,999
Commercial Non-Agency [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		558	571
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		12	15
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		0	0
Available-for-sale debt securities, net carrying value		570	586
Debt securities available for sale		570	586
Corporate and other debt securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		1,090	1,126
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		56	78
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		0	0
Available-for-sale debt securities, net carrying value		1,146	1,204
Debt securities available for sale		$ 1,146	$ 1,204
[1]	The gross unrealized losses recognized in OCI on securities held to maturity resulted from a transfer of securities available for sale to held to maturity in the second quarter of 2013.

Securities (Schedule Of Cost An

Securities (Schedule Of Cost And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity By Contractual Maturity) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Debt Securities held to maturity, amortized cost	$ 1,077	$ 1,143
Debt Securities held to maturity, estimated fair value	1,131	1,215
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	268
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	271
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	756
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	793
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	285
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	303
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	110
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	109
Debt Securities, Available-for-sale, Amortized Cost	26,579	26,092
Debt securities available for sale	27,092	27,154
Residential Agency [Member]
Debt Securities held to maturity, amortized cost	501	554
Debt Securities held to maturity, estimated fair value	513	569
Debt Securities, Available-for-sale, Amortized Cost	18,563	18,455
Debt securities available for sale	18,846	19,076
Residential Non-Agency [Member]
Debt Securities, Available-for-sale, Amortized Cost	1	1
Debt securities available for sale	1	1
Commercial Agency [Member]
Debt Securities held to maturity, amortized cost	576	589
Debt Securities held to maturity, estimated fair value	618	646
Debt Securities, Available-for-sale, Amortized Cost	6,038	5,659
Debt securities available for sale	6,199	5,999
Commercial Non-Agency [Member]
Debt Securities, Available-for-sale, Amortized Cost	558	571
Debt securities available for sale	$ 570	$ 586

Securities (Schedule Of Gross U

Securities (Schedule Of Gross Unrealized Losses And Estimated Fair Value Of Securities Available For Sale and Held to Maturity) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Unrealized Loss And Fair Value On Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 8,868	$ 1,733
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(237)	(10)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	42	101
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	8,910	1,834
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(237)	(10)
US Treasury Securities [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	62
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	64
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(1)
Federal Agency Securities [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	62
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	62
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(3)
Residential Agency [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	7,100	914
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(175)	(4)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	21	101
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	7,121	1,015
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(175)	(4)
Commercial Agency [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,644	819
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(58)	(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	19	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	1,663	819
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (58)	$ (6)

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Millions	Mar. 31, 2021USD ($)security	Dec. 31, 2020USD ($)security
Debt Securities, Available-for-sale [Line Items]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value	$ 9,500	$ 10,300
Number of individual positions in unrealized loss position | security	254	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

Loans and the Allowance for C_3

Loans and the Allowance for Credit Losses (Schedule Of Loan Portfolio, Net Of Unearned Income) (Details) - USD ($) $ in Millions	Mar. 31, 2021		Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 84,755	[1]	$ 85,266
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	43,241		42,870
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,335		5,405
Commercial Real Estate Construction - Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	293		300
Commercial Investor Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,405		5,394
Commercial Investor Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,817		1,869
Residential First Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	16,643		16,575
Home Equity Line [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,286		4,539
Home Equity Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,631		2,713
Indirect-vehicles [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	768		934
Indirect-other consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,262		2,431
Consumer Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,111		1,213
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	963		1,023
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	48,869		48,575
Total Investor Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	7,222		7,263
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 28,664	[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.

Loans and the Allowance for C_4

Loans and the Allowance for Credit Losses (Analysis of the Allowance for Credit Losses by Portfolio Segment) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021		Mar. 31, 2020	Dec. 31, 2020	Jan. 01, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	$ 2,167,000,000		$ 869,000,000
Provision (credit) for loan and lease losses	(108,000,000)		376,000,000
Loan losses:
Charge-offs	(114,000,000)		(144,000,000)
Recoveries	31,000,000		21,000,000
Net loan losses	(83,000,000)		(123,000,000)
Total allowance for loan losses	1,976,000,000		1,560,000,000
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve For Unfunded Credit Commitments, beginning of period	126,000,000		45,000,000
Provision (credit) for unfunded credit losses	(34,000,000)		(3,000,000)
Reserve For Unfunded Credit Commitments, end of period	92,000,000		105,000,000
Allowance for Credit Losses, end of period	2,068,000,000		1,665,000,000
Unfunded credit commitments, Change in Method, Credit Loss Expense					$ 63,000,000
Accounts Receivable, Change in Method, Credit Loss Expense (Reversal)					438,000,000
Portion of ending allowance for loan losses:
Total allowance for loan losses	1,976,000,000		1,560,000,000
Portion of loan portfolio ending balance:
Loans, net of unearned income	84,755,000,000	[1]		$ 85,266,000,000
Loan and Lease Receivable, Allowance, Beginning Balance as adjusted for CECL					1,307,000,000
Reserve For Unfunded Credit Commitments, Beginning Balance as adjusted for CECL					108,000,000
Commercial Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	1,196,000,000		537,000,000
Provision (credit) for loan and lease losses	(83,000,000)		251,000,000
Loan losses:
Charge-offs	(47,000,000)		(71,000,000)
Recoveries	16,000,000		7,000,000
Net loan losses	(31,000,000)		(64,000,000)
Total allowance for loan losses	1,082,000,000		721,000,000
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve For Unfunded Credit Commitments, beginning of period	97,000,000		41,000,000
Provision (credit) for unfunded credit losses	(30,000,000)		(4,000,000)
Reserve For Unfunded Credit Commitments, end of period	67,000,000		73,000,000
Allowance for Credit Losses, end of period	1,149,000,000		794,000,000
Unfunded credit commitments, Change in Method, Credit Loss Expense					36,000,000
Accounts Receivable, Change in Method, Credit Loss Expense (Reversal)					(3,000,000)
Portion of ending allowance for loan losses:
Total allowance for loan losses	1,082,000,000		721,000,000
Portion of loan portfolio ending balance:
Loans, net of unearned income	48,869,000,000			48,575,000,000
Loan and Lease Receivable, Allowance, Beginning Balance as adjusted for CECL					534,000,000
Reserve For Unfunded Credit Commitments, Beginning Balance as adjusted for CECL					77,000,000
Total Investor Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	183,000,000		45,000,000
Provision (credit) for loan and lease losses	(18,000,000)		10,000,000
Loan losses:
Charge-offs	(15,000,000)		0
Recoveries	0		1,000,000
Net loan losses	(15,000,000)		1,000,000
Total allowance for loan losses	150,000,000		63,000,000
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve For Unfunded Credit Commitments, beginning of period	14,000,000		4,000,000
Provision (credit) for unfunded credit losses	(3,000,000)		1,000,000
Reserve For Unfunded Credit Commitments, end of period	11,000,000		18,000,000
Allowance for Credit Losses, end of period	161,000,000		81,000,000
Unfunded credit commitments, Change in Method, Credit Loss Expense					13,000,000
Accounts Receivable, Change in Method, Credit Loss Expense (Reversal)					7,000,000
Portion of ending allowance for loan losses:
Total allowance for loan losses	150,000,000		63,000,000
Portion of loan portfolio ending balance:
Loans, net of unearned income	7,222,000,000			7,263,000,000
Loan and Lease Receivable, Allowance, Beginning Balance as adjusted for CECL					52,000,000
Reserve For Unfunded Credit Commitments, Beginning Balance as adjusted for CECL					17,000,000
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	788,000,000		287,000,000
Provision (credit) for loan and lease losses	(7,000,000)		115,000,000
Loan losses:
Charge-offs	(52,000,000)		(73,000,000)
Recoveries	15,000,000		13,000,000
Net loan losses	(37,000,000)		(60,000,000)
Total allowance for loan losses	744,000,000		776,000,000
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve For Unfunded Credit Commitments, beginning of period	15,000,000		0
Provision (credit) for unfunded credit losses	(1,000,000)		0
Reserve For Unfunded Credit Commitments, end of period	14,000,000		14,000,000
Allowance for Credit Losses, end of period	758,000,000		790,000,000
Unfunded credit commitments, Change in Method, Credit Loss Expense					14,000,000
Accounts Receivable, Change in Method, Credit Loss Expense (Reversal)					434,000,000
Portion of ending allowance for loan losses:
Total allowance for loan losses	744,000,000		$ 776,000,000
Portion of loan portfolio ending balance:
Loans, net of unearned income	$ 28,664,000,000	[1]		$ 29,428,000,000
Loan and Lease Receivable, Allowance, Beginning Balance as adjusted for CECL					721,000,000
Reserve For Unfunded Credit Commitments, Beginning Balance as adjusted for CECL					$ 14,000,000
[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.

Loans and the Allowance for C_5

Loans and the Allowance for Credit Losses (Credit Quality Indicators) (Details) - USD ($) $ in Millions		Mar. 31, 2021		Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		$ 5,978		$ 23,532
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		21,420		13,322
Financing Receivable, Originated Two Years before Latest Fiscal Year		12,452		9,190
Financing Receivable, Originated Three Years before Latest Fiscal Year		8,108		5,618
Financing Receivable, Originated Four Years before Latest Fiscal Year		5,088		3,912
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		11,362		8,685
Financing Receivable, Revolving		20,057		20,657
Financing Receivable, Revolving Converted to Amortizing		79		76
Financing Receivable, Unallocated	[1]	211		274
Loans, net of unearned income		84,755	[1]	85,266
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		3,795		12,476
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		10,661		6,474
Financing Receivable, Originated Two Years before Latest Fiscal Year		6,045		4,101
Financing Receivable, Originated Three Years before Latest Fiscal Year		3,693		2,572
Financing Receivable, Originated Four Years before Latest Fiscal Year		2,360		1,214
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		3,462		2,564
Financing Receivable, Revolving		13,316		13,508
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(91)		39
Loans, net of unearned income		43,241		42,870
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		315		1,414
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1,354		974
Financing Receivable, Originated Two Years before Latest Fiscal Year		934		971
Financing Receivable, Originated Three Years before Latest Fiscal Year		890		606
Financing Receivable, Originated Four Years before Latest Fiscal Year		564		421
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		1,138		874
Financing Receivable, Revolving		144		148
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(4)		(3)
Loans, net of unearned income		5,335		5,405
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		3		62
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		75		78
Financing Receivable, Originated Two Years before Latest Fiscal Year		66		40
Financing Receivable, Originated Three Years before Latest Fiscal Year		38		30
Financing Receivable, Originated Four Years before Latest Fiscal Year		28		30
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		75		51
Financing Receivable, Revolving		8		9
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		293		300
Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		451		1,737
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1,507		1,478
Financing Receivable, Originated Two Years before Latest Fiscal Year		1,545		1,271
Financing Receivable, Originated Three Years before Latest Fiscal Year		1,090		267
Financing Receivable, Originated Four Years before Latest Fiscal Year		260		67
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		184		179
Financing Receivable, Revolving		374		400
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(6)		(5)
Loans, net of unearned income		5,405		5,394
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		43		255
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		254		638
Financing Receivable, Originated Two Years before Latest Fiscal Year		622		297
Financing Receivable, Originated Three Years before Latest Fiscal Year		223		1
Financing Receivable, Originated Four Years before Latest Fiscal Year		1		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		2		1
Financing Receivable, Revolving		683		688
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(11)		(11)
Loans, net of unearned income		1,817		1,869
Residential First Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		1,086		6,383
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		6,372		2,094
Financing Receivable, Originated Two Years before Latest Fiscal Year		1,883		1,048
Financing Receivable, Originated Three Years before Latest Fiscal Year		912		1,266
Financing Receivable, Originated Four Years before Latest Fiscal Year		1,109		1,534
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		5,130		4,098
Financing Receivable, Revolving		9		10
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	142		142
Loans, net of unearned income		16,643		16,575
Home Equity Line [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		4,178		4,433
Financing Receivable, Revolving Converted to Amortizing		79		76
Financing Receivable, Unallocated	[1]	29		30
Loans, net of unearned income		4,286		4,539
Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		156		498
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		476		317
Financing Receivable, Originated Two Years before Latest Fiscal Year		283		298
Financing Receivable, Originated Three Years before Latest Fiscal Year		262		403
Financing Receivable, Originated Four Years before Latest Fiscal Year		364		386
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		1,070		790
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	20		21
Loans, net of unearned income		2,631		2,713
Indirect-vehicles [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		30
Financing Receivable, Originated Two Years before Latest Fiscal Year		26		445
Financing Receivable, Originated Three Years before Latest Fiscal Year		384		214
Financing Receivable, Originated Four Years before Latest Fiscal Year		179		154
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		165		74
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	14		17
Loans, net of unearned income		768		934
Indirect-other consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		346
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		449		992
Financing Receivable, Originated Two Years before Latest Fiscal Year		845		596
Financing Receivable, Originated Three Years before Latest Fiscal Year		520		217
Financing Receivable, Originated Four Years before Latest Fiscal Year		193		96
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		125		49
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	130		135
Loans, net of unearned income		2,262		2,431
Consumer Credit Card [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		1,125		1,228
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(14)		(15)
Loans, net of unearned income		1,111		1,213
Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		129		361
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		272		247
Financing Receivable, Originated Two Years before Latest Fiscal Year		203		123
Financing Receivable, Originated Three Years before Latest Fiscal Year		96		42
Financing Receivable, Originated Four Years before Latest Fiscal Year		30		10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		11		5
Financing Receivable, Revolving		220		233
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	2		2
Loans, net of unearned income		963		1,023
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		3,755		12,260
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		10,495		6,115
Financing Receivable, Originated Two Years before Latest Fiscal Year		5,656		3,550
Financing Receivable, Originated Three Years before Latest Fiscal Year		3,182		2,413
Financing Receivable, Originated Four Years before Latest Fiscal Year		2,242		1,166
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		3,367		2,493
Financing Receivable, Revolving		12,048		12,138
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(91)		39
Loans, net of unearned income	[2]	40,654		40,096
Pass [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		312		1,379
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1,315		882
Financing Receivable, Originated Two Years before Latest Fiscal Year		841		913
Financing Receivable, Originated Three Years before Latest Fiscal Year		844		547
Financing Receivable, Originated Four Years before Latest Fiscal Year		512		401
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		1,060		801
Financing Receivable, Revolving		137		140
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(4)		(3)
Loans, net of unearned income		5,017		5,060
Pass [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		3		61
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		74		75
Financing Receivable, Originated Two Years before Latest Fiscal Year		63		39
Financing Receivable, Originated Three Years before Latest Fiscal Year		37		24
Financing Receivable, Originated Four Years before Latest Fiscal Year		23		24
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		58		40
Financing Receivable, Revolving		8		9
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		266		272
Pass [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		396		1,663
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1,375		1,243
Financing Receivable, Originated Two Years before Latest Fiscal Year		1,168		1,137
Financing Receivable, Originated Three Years before Latest Fiscal Year		995		252
Financing Receivable, Originated Four Years before Latest Fiscal Year		245		65
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		161		162
Financing Receivable, Revolving		315		332
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(6)		(5)
Loans, net of unearned income		4,649		4,849
Pass [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		43		224
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		253		601
Financing Receivable, Originated Two Years before Latest Fiscal Year		590		266
Financing Receivable, Originated Three Years before Latest Fiscal Year		191		1
Financing Receivable, Originated Four Years before Latest Fiscal Year		1		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		2		1
Financing Receivable, Revolving		680		679
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(11)		(11)
Loans, net of unearned income		1,749		1,761
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		6		133
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		91		250
Financing Receivable, Originated Two Years before Latest Fiscal Year		252		376
Financing Receivable, Originated Three Years before Latest Fiscal Year		302		84
Financing Receivable, Originated Four Years before Latest Fiscal Year		44		5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		54		48
Financing Receivable, Revolving		560		722
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		1,309		1,618
Special Mention [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		3		18
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		24		31
Financing Receivable, Originated Two Years before Latest Fiscal Year		25		23
Financing Receivable, Originated Three Years before Latest Fiscal Year		17		22
Financing Receivable, Originated Four Years before Latest Fiscal Year		18		10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		47		44
Financing Receivable, Revolving		1		6
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0		0
Loans, net of unearned income		135		154
Special Mention [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		2
Financing Receivable, Originated Four Years before Latest Fiscal Year		2		2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		2		0
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		4		5
Special Mention [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		55		5
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		61		77
Financing Receivable, Originated Two Years before Latest Fiscal Year		179		76
Financing Receivable, Originated Three Years before Latest Fiscal Year		38		15
Financing Receivable, Originated Four Years before Latest Fiscal Year		15		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		11		7
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		359		180
Special Mention [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		30
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		36
Financing Receivable, Originated Two Years before Latest Fiscal Year		32		31
Financing Receivable, Originated Three Years before Latest Fiscal Year		32		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		3		9
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		67		106
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		16		41
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		39		50
Financing Receivable, Originated Two Years before Latest Fiscal Year		80		78
Financing Receivable, Originated Three Years before Latest Fiscal Year		118		55
Financing Receivable, Originated Four Years before Latest Fiscal Year		54		20
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		8		4
Financing Receivable, Revolving		537		490
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		852		738
Substandard [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		4		38
Financing Receivable, Originated Two Years before Latest Fiscal Year		45		16
Financing Receivable, Originated Three Years before Latest Fiscal Year		12		16
Financing Receivable, Originated Four Years before Latest Fiscal Year		12		4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		16		15
Financing Receivable, Revolving		1		2
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0		0
Loans, net of unearned income		90		94
Substandard [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1		3
Financing Receivable, Originated Two Years before Latest Fiscal Year		3		1
Financing Receivable, Originated Three Years before Latest Fiscal Year		1		3
Financing Receivable, Originated Four Years before Latest Fiscal Year		2		4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		7		3
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		14		14
Substandard [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		69
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		71		114
Financing Receivable, Originated Two Years before Latest Fiscal Year		160		57
Financing Receivable, Originated Three Years before Latest Fiscal Year		57		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		9		9
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		297		251
Substandard [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1		1
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		1		2
Non Accrual [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		18		42
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		36		59
Financing Receivable, Originated Two Years before Latest Fiscal Year		57		97
Financing Receivable, Originated Three Years before Latest Fiscal Year		91		20
Financing Receivable, Originated Four Years before Latest Fiscal Year		20		23
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		33		19
Financing Receivable, Revolving		171		158
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		426		418
Non Accrual [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		14
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		11		23
Financing Receivable, Originated Two Years before Latest Fiscal Year		23		19
Financing Receivable, Originated Three Years before Latest Fiscal Year		17		21
Financing Receivable, Originated Four Years before Latest Fiscal Year		22		6
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		15		14
Financing Receivable, Revolving		5		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		93		97
Non Accrual [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		1
Financing Receivable, Originated Four Years before Latest Fiscal Year		1		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		8		8
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		9		9
Non Accrual [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		44
Financing Receivable, Originated Two Years before Latest Fiscal Year		38		1
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		3		1
Financing Receivable, Revolving		59		68
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		100		114
Non Accrual [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		0		0
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		4,113		13,952
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		12,090		7,526
Financing Receivable, Originated Two Years before Latest Fiscal Year		7,045		5,112
Financing Receivable, Originated Three Years before Latest Fiscal Year		4,621		3,208
Financing Receivable, Originated Four Years before Latest Fiscal Year		2,952		1,665
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		4,675		3,489
Financing Receivable, Revolving		13,468		13,665
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(95)		(42)
Loans, net of unearned income		48,869		48,575
Total Investor Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		494		1,992
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1,761		2,116
Financing Receivable, Originated Two Years before Latest Fiscal Year		2,167		1,568
Financing Receivable, Originated Three Years before Latest Fiscal Year		1,313		268
Financing Receivable, Originated Four Years before Latest Fiscal Year		261		67
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		186		180
Financing Receivable, Revolving		1,057		1,088
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(17)		(16)
Loans, net of unearned income		7,222		7,263
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		1,371		7,588
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		7,569		3,680
Financing Receivable, Originated Two Years before Latest Fiscal Year		3,240		2,510
Financing Receivable, Originated Three Years before Latest Fiscal Year		2,174		2,142
Financing Receivable, Originated Four Years before Latest Fiscal Year		1,875		2,180
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		6,501		5,016
Financing Receivable, Revolving		5,532		5,904
Financing Receivable, Revolving Converted to Amortizing		79		76
Financing Receivable, Unallocated	[1]	323		332
Loans, net of unearned income		28,664	[1]	29,428
FICO Scores, Above 720 [Member] | Residential First Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		902		5,564
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		5,602		1,738
Financing Receivable, Originated Two Years before Latest Fiscal Year		1,554		809
Financing Receivable, Originated Three Years before Latest Fiscal Year		695		1,023
Financing Receivable, Originated Four Years before Latest Fiscal Year		886		1,279
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		3,558		2,709
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		13,197		13,122
FICO Scores, Above 720 [Member] | Home Equity Line [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		3,152		3,334
Financing Receivable, Revolving Converted to Amortizing		46		45
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		3,198		3,379
FICO Scores, Above 720 [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		129		417
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		406		251
Financing Receivable, Originated Two Years before Latest Fiscal Year		223		233
Financing Receivable, Originated Three Years before Latest Fiscal Year		205		325
Financing Receivable, Originated Four Years before Latest Fiscal Year		290		304
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		804		580
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		2,057		2,110
FICO Scores, Above 720 [Member] | Indirect-vehicles [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		18
Financing Receivable, Originated Two Years before Latest Fiscal Year		16		305
Financing Receivable, Originated Three Years before Latest Fiscal Year		264		137
Financing Receivable, Originated Four Years before Latest Fiscal Year		114		92
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		95		40
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		489		592
FICO Scores, Above 720 [Member] | Indirect-other consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		297
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		365		721
Financing Receivable, Originated Two Years before Latest Fiscal Year		609		392
Financing Receivable, Originated Three Years before Latest Fiscal Year		345		138
Financing Receivable, Originated Four Years before Latest Fiscal Year		124		60
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		80		31
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		1,523		1,639
FICO Scores, Above 720 [Member] | Consumer Credit Card [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		609		667
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0		0
Loans, net of unearned income		609		667
FICO Scores, Above 720 [Member] | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		56		209
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		183		163
Financing Receivable, Originated Two Years before Latest Fiscal Year		136		84
Financing Receivable, Originated Three Years before Latest Fiscal Year		67		30
Financing Receivable, Originated Four Years before Latest Fiscal Year		22		7
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		7		3
Financing Receivable, Revolving		110		117
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		581		613
FICO Scores, 681-720 [Member] | Residential First Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		118		525
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		475		189
Financing Receivable, Originated Two Years before Latest Fiscal Year		155		103
Financing Receivable, Originated Three Years before Latest Fiscal Year		90		112
Financing Receivable, Originated Four Years before Latest Fiscal Year		91		113
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		453		360
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		1,382		1,402
FICO Scores, 681-720 [Member] | Home Equity Line [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		452		492
Financing Receivable, Revolving Converted to Amortizing		10		10
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		462		502
FICO Scores, 681-720 [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		20		57
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		48		40
Financing Receivable, Originated Two Years before Latest Fiscal Year		35		35
Financing Receivable, Originated Three Years before Latest Fiscal Year		30		39
Financing Receivable, Originated Four Years before Latest Fiscal Year		36		37
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		102		76
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		271		284
FICO Scores, 681-720 [Member] | Indirect-vehicles [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		5
Financing Receivable, Originated Two Years before Latest Fiscal Year		4		50
Financing Receivable, Originated Three Years before Latest Fiscal Year		43		22
Financing Receivable, Originated Four Years before Latest Fiscal Year		19		16
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		17		8
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		83		101
FICO Scores, 681-720 [Member] | Indirect-other consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		39
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		53		173
Financing Receivable, Originated Two Years before Latest Fiscal Year		151		116
Financing Receivable, Originated Three Years before Latest Fiscal Year		99		41
Financing Receivable, Originated Four Years before Latest Fiscal Year		37		18
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		23		9
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		363		396
FICO Scores, 681-720 [Member] | Consumer Credit Card [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		237		255
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0		0
Loans, net of unearned income		237		255
FICO Scores, 681-720 [Member] | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		17		61
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		49		44
Financing Receivable, Originated Two Years before Latest Fiscal Year		36		20
Financing Receivable, Originated Three Years before Latest Fiscal Year		15		5
Financing Receivable, Originated Four Years before Latest Fiscal Year		4		1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		2		1
Financing Receivable, Revolving		52		52
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		175		184
FICO Scores, 620-680 [Member] | Residential First Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		45		211
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		200		100
Financing Receivable, Originated Two Years before Latest Fiscal Year		103		73
Financing Receivable, Originated Three Years before Latest Fiscal Year		65		64
Financing Receivable, Originated Four Years before Latest Fiscal Year		67		67
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		445		404
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		925		919
FICO Scores, 620-680 [Member] | Home Equity Line [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		297		319
Financing Receivable, Revolving Converted to Amortizing		12		11
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		309		330
FICO Scores, 620-680 [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		7		21
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		19		17
Financing Receivable, Originated Two Years before Latest Fiscal Year		16		19
Financing Receivable, Originated Three Years before Latest Fiscal Year		16		22
Financing Receivable, Originated Four Years before Latest Fiscal Year		21		25
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		82		65
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		161		169
FICO Scores, 620-680 [Member] | Indirect-vehicles [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		4
Financing Receivable, Originated Two Years before Latest Fiscal Year		3		44
Financing Receivable, Originated Three Years before Latest Fiscal Year		38		23
Financing Receivable, Originated Four Years before Latest Fiscal Year		19		18
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		20		8
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		80		97
FICO Scores, 620-680 [Member] | Indirect-other consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		9
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		12		73
Financing Receivable, Originated Two Years before Latest Fiscal Year		64		63
Financing Receivable, Originated Three Years before Latest Fiscal Year		55		27
Financing Receivable, Originated Four Years before Latest Fiscal Year		23		12
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		15		6
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		169		190
FICO Scores, 620-680 [Member] | Consumer Credit Card [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		192		208
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0		0
Loans, net of unearned income		192		208
FICO Scores, 620-680 [Member] | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		11		34
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		30		28
Financing Receivable, Originated Two Years before Latest Fiscal Year		22		13
Financing Receivable, Originated Three Years before Latest Fiscal Year		9		4
Financing Receivable, Originated Four Years before Latest Fiscal Year		3		1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		1		1
Financing Receivable, Revolving		38		42
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		114		123
FICO Scores, Below 620 [Member] | Residential First Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		7		31
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		39		44
Financing Receivable, Originated Two Years before Latest Fiscal Year		47		50
Financing Receivable, Originated Three Years before Latest Fiscal Year		52		51
Financing Receivable, Originated Four Years before Latest Fiscal Year		51		60
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		539		499
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		735		735
FICO Scores, Below 620 [Member] | Home Equity Line [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		173		181
Financing Receivable, Revolving Converted to Amortizing		8		7
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		181		188
FICO Scores, Below 620 [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		2
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		2		7
Financing Receivable, Originated Two Years before Latest Fiscal Year		7		9
Financing Receivable, Originated Three Years before Latest Fiscal Year		8		13
Financing Receivable, Originated Four Years before Latest Fiscal Year		13		15
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		61		52
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		91		98
FICO Scores, Below 620 [Member] | Indirect-vehicles [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		3
Financing Receivable, Originated Two Years before Latest Fiscal Year		3		42
Financing Receivable, Originated Three Years before Latest Fiscal Year		36		26
Financing Receivable, Originated Four Years before Latest Fiscal Year		22		24
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		27		14
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		88		109
FICO Scores, Below 620 [Member] | Indirect-other consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		2		22
Financing Receivable, Originated Two Years before Latest Fiscal Year		18		22
Financing Receivable, Originated Three Years before Latest Fiscal Year		18		9
Financing Receivable, Originated Four Years before Latest Fiscal Year		7		5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		6		2
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		51		61
FICO Scores, Below 620 [Member] | Consumer Credit Card [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		79		91
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0		0
Loans, net of unearned income		79		91
FICO Scores, Below 620 [Member] | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		2		11
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		9		11
Financing Receivable, Originated Two Years before Latest Fiscal Year		9		6
Financing Receivable, Originated Three Years before Latest Fiscal Year		5		3
Financing Receivable, Originated Four Years before Latest Fiscal Year		1		1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		1		0
Financing Receivable, Revolving		17		19
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated		0	[1]	0
Loans, net of unearned income		44		51
FICO Scores, Data not available [Member] [Member] | Residential First Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		14		52
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		56		23
Financing Receivable, Originated Two Years before Latest Fiscal Year		24		13
Financing Receivable, Originated Three Years before Latest Fiscal Year		10		16
Financing Receivable, Originated Four Years before Latest Fiscal Year		14		15
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		135		126
Financing Receivable, Revolving		9		10
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	142		142
Loans, net of unearned income		404		397
FICO Scores, Data not available [Member] [Member] | Home Equity Line [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		104		107
Financing Receivable, Revolving Converted to Amortizing		3		3
Financing Receivable, Unallocated	[1]	29		30
Loans, net of unearned income		136		140
FICO Scores, Data not available [Member] [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1		2
Financing Receivable, Originated Two Years before Latest Fiscal Year		2		2
Financing Receivable, Originated Three Years before Latest Fiscal Year		3		4
Financing Receivable, Originated Four Years before Latest Fiscal Year		4		5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		21		17
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	20		21
Loans, net of unearned income		51		52
FICO Scores, Data not available [Member] [Member] | Indirect-vehicles [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		4
Financing Receivable, Originated Three Years before Latest Fiscal Year		3		6
Financing Receivable, Originated Four Years before Latest Fiscal Year		5		4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		6		4
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	14		17
Loans, net of unearned income		28		35
FICO Scores, Data not available [Member] [Member] | Indirect-other consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		17		3
Financing Receivable, Originated Two Years before Latest Fiscal Year		3		3
Financing Receivable, Originated Three Years before Latest Fiscal Year		3		2
Financing Receivable, Originated Four Years before Latest Fiscal Year		2		1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		1		1
Financing Receivable, Revolving		0		0
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	130		135
Loans, net of unearned income		156		145
FICO Scores, Data not available [Member] [Member] | Consumer Credit Card [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		0		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		8		7
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	(14)		(15)
Loans, net of unearned income		6		8
FICO Scores, Data not available [Member] [Member] | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year		43		46
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1		1
Financing Receivable, Originated Two Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0		0
Financing Receivable, Revolving		3		3
Financing Receivable, Revolving Converted to Amortizing		0		0
Financing Receivable, Unallocated	[1]	2		2
Loans, net of unearned income		$ 49		$ 52
[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.
[2]	Commercial and Industrial lending includes PPP lending in the 2020 and 2021 vintage years.

Loans and the Allowance for C_6

Loans and the Allowance for Credit Losses (Schedule of Aging Analysis Of Days Past Due (DPD) For Each Portfolio Class) (Details) - USD ($) $ in Millions	Mar. 31, 2021		Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	$ 205		$ 221
Total Accrual	84,017		84,521
Nonaccrual	738		745
Loans, net of unearned income	84,755	[1]	85,266
Financing Receivable, Total 30 Days for more past due	461		554
Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	8		7
Total Accrual	42,815		42,452
Nonaccrual	426		418
Loans, net of unearned income	43,241		42,870
Financing Receivable, Total 30 Days for more past due	50		66
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	1		1
Total Accrual	5,242		5,308
Nonaccrual	93		97
Loans, net of unearned income	5,335		5,405
Financing Receivable, Total 30 Days for more past due	10		6
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	0		0
Total Accrual	284		291
Nonaccrual	9		9
Loans, net of unearned income	293		300
Financing Receivable, Total 30 Days for more past due	1		1
Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	9		8
Total Accrual	48,341		48,051
Nonaccrual	528		524
Loans, net of unearned income	48,869		48,575
Financing Receivable, Total 30 Days for more past due	61		73
Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	0		0
Total Accrual	5,305		5,280
Nonaccrual	100		114
Loans, net of unearned income	5,405		5,394
Financing Receivable, Total 30 Days for more past due	2		3
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	0		0
Total Accrual	1,817		1,869
Nonaccrual	0		0
Loans, net of unearned income	1,817		1,869
Financing Receivable, Total 30 Days for more past due	1		0
Total Investor Real Estate [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	0		0
Total Accrual	7,122		7,149
Nonaccrual	100		114
Loans, net of unearned income	7,222		7,263
Financing Receivable, Total 30 Days for more past due	3		3
Residential First Mortgage [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	138		156
Total Accrual	16,590		16,522
Nonaccrual	53		53
Loans, net of unearned income	16,643		16,575
Financing Receivable, Total 30 Days for more past due	258		301
Home Equity Line [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	19		19
Total Accrual	4,238		4,493
Nonaccrual	48		46
Loans, net of unearned income	4,286		4,539
Financing Receivable, Total 30 Days for more past due	41		54
Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	14		13
Total Accrual	2,622		2,705
Nonaccrual	9		8
Loans, net of unearned income	2,631		2,713
Financing Receivable, Total 30 Days for more past due	26		30
Indirect-vehicles [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	3		4
Total Accrual	768		934
Nonaccrual	0		0
Loans, net of unearned income	768		934
Financing Receivable, Total 30 Days for more past due	14		23
Indirect-other consumer [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	4		5
Total Accrual	2,262		2,431
Nonaccrual	0		0
Loans, net of unearned income	2,262		2,431
Financing Receivable, Total 30 Days for more past due	18		25
Consumer Credit Card [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	14		14
Total Accrual	1,111		1,213
Nonaccrual	0		0
Loans, net of unearned income	1,111		1,213
Financing Receivable, Total 30 Days for more past due	26		28
Other consumer
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	4		2
Total Accrual	963		1,023
Nonaccrual	0		0
Loans, net of unearned income	963		1,023
Financing Receivable, Total 30 Days for more past due	14		17
Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
90 plus DPD, Accrual Loans	196		213
Total Accrual	28,554		29,321
Nonaccrual	110		107
Loans, net of unearned income	28,664		29,428
Financing Receivable, Total 30 Days for more past due	397		478
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	84		103
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	15		22
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	2		1
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	0		0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	17		23
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	1		0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	0		0
Financial Asset, 60 to 89 Days Past Due [Member] | Total Investor Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	1		0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential First Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	38		41
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Line [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	8		11
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	3		7
Financial Asset, 60 to 89 Days Past Due [Member] | Indirect-vehicles [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	2		4
Financial Asset, 60 to 89 Days Past Due [Member] | Indirect-other consumer [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	7		8
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Credit Card [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	5		6
Financial Asset, 60 to 89 Days Past Due [Member] | Other consumer
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	3		3
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	66		80
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	172		230
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	27		37
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	7		4
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	1		1
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	35		42
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	1		3
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	1		0
Financial Asset, 30 to 59 Days Past Due [Member] | Total Investor Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	2		3
Financial Asset, 30 to 59 Days Past Due [Member] | Residential First Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	82		104
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Line [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	14		24
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	9		10
Financial Asset, 30 to 59 Days Past Due [Member] | Indirect-vehicles [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	9		15
Financial Asset, 30 to 59 Days Past Due [Member] | Indirect-other consumer [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	7		12
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Credit Card [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	7		8
Financial Asset, 30 to 59 Days Past Due [Member] | Other consumer
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	7		12
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Financing Receiable, Past Due between 30 and 89 Days	$ 135		$ 185
[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.

Loans and the Allowance for C_7

Loans and the Allowance for Credit Losses (Loans By Class Modified In TDR) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)obligor	Mar. 31, 2020USD ($)obligor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	260	124
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 74	$ 86
Increase in Allowance at Modification	$ 3	$ 1
Commercial And Industrial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	26	26
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 30	$ 74
Increase in Allowance at Modification	$ 0	$ 0
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	6	5
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1	$ 2
Increase in Allowance at Modification	$ 0	$ 0
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0
Increase in Allowance at Modification	$ 0
Commercial investor real estate mortgage [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	2	4
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 7	$ 1
Increase in Allowance at Modification	$ 0	$ 0
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	0	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Increase in Allowance at Modification	$ 0	$ 0
Residential First Mortgage [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	175	52
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 35	$ 7
Increase in Allowance at Modification	$ 3	$ 1
Home Equity Line [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	2	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Increase in Allowance at Modification	$ 0	$ 0
Home Equity Loan [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	1	15
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 1
Increase in Allowance at Modification	$ 0	$ 0
Consumer Credit Card [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	0	10
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Increase in Allowance at Modification	$ 0	$ 0
Indirect-vehicles and other consumer [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	48	10
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1	$ 0
Increase in Allowance at Modification	$ 0	$ 0
Commercial Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	32	32
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 31	$ 77
Increase in Allowance at Modification	$ 0	$ 0
Total Investor Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	2	5
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 7	$ 1
Increase in Allowance at Modification	$ 0	$ 0
Consumer Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Obligors | obligor	226	87
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 36	$ 8
Increase in Allowance at Modification	$ 3	$ 1

Loans and the Allowance for C_8

Loans and the Allowance for Credit Losses (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payroll Protection Program loans	$ 4,300
Financing Receivable, Allowance for Credit Loss	2,068	$ 1,665
Federal Home Loan Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged loans	19,600
Federal Reserve Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged loans	17,700
Indirect-other consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Purchase	261	$ 470
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales-type and direct financing lease receivable	1,200
Sales-Type and Direct Financing	16
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual, No Allowance	$ 105		$ 112

Servicing of Financial Assets_2

Servicing of Financial Assets (Analysis Of Residential Mortgage Servicing Rights Under The Fair Value Measurement Method) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying value, beginning of period		$ 296
Carrying value, end of period		401
Residential Mortgage [Member]
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying value, beginning of period		296	$ 345
Additions		32	11
Increase (decrease) in fair value, due to change in valuation inputs or assumptions		90	(83)
Increase (decrease) in fair value, economic amortization associated with borrower repayments	[1]	(17)	(19)
Carrying value, end of period		$ 401	$ 254
[1]	"Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns. Regions' MSR decay methodology is a discounted net cash flow approach.

Servicing of Financial Assets_3

Servicing of Financial Assets (Data And Assumptions Used In The Fair Value Calculation As Well As The Valuation's Sensitivity To Rate Fluctuations Related To Residential Mortgage Servicing Rights) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)basis_point	Mar. 31, 2020USD ($)basis_point
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance	$ 34,212	$ 33,787
Weighted-average prepayment speed (CPR; percentage)	10.20%	18.10%
Estimated impact on fair value of a 10% increase in prepayment speed	$ (28)	$ (26)
Estimated impact on fair value of a 20% increase in prepayment speed	$ (51)	$ (49)
Option-adjusted spread (basis points) | basis_point	564	629
Estimated impact on fair value of a 10% increase in other assumptions	$ (10)	$ (5)
Estimated impact on fair value of a 20% increase in other assumptions	$ (21)	$ (10)
Weighted-average coupon interest rate	3.80%	4.20%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Weighted Average Life	289 months	278 months
Weighted Average Servicing Fee Basis Points | basis_point	27.5	27.4

Servicing of Financial Assets_4

Servicing of Financial Assets (Schedule Of Fees Resulting From The Servicing Of Mortgage Loans) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets [Line Items]
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset
Residential Mortgage [Member]
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets [Line Items]
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	$ 24	$ 25

Servicing of Financial Assets_5

Servicing of Financial Assets (Analysis of Commercial Mortgage Banking Servicing Rights Under Amortized Cost) (Details) - Commercial Real Estate [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Servicing Asset at Amortized Cost, Beginning Balance	$ 74	$ 59
Servicing Asset at Amortized Cost, Additions	11	3
Servicing Asset at Amortized Cost, Amortization	3	3
Servicing Asset at Amortized Cost, Ending Balance	$ 82	$ 59

Servicing of Financial Assets_6

Servicing of Financial Assets (Servicing Related Fee For Commercial Mortgage Banking (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets [Line Items]
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset
Commercial Real Estate [Member]
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets [Line Items]
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	$ 5	$ 5

Servicing of Financial Assets_7

Servicing of Financial Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Servicing Assets at Fair Value [Line Items]
Payments to Acquire Mortgage Servicing Rights (MSR)	$ 11	$ 4
Residential mortgage servicing rights at fair value	401		$ 296
Flow Purchase price [Domain]
Servicing Assets at Fair Value [Line Items]
Payments to Acquire Mortgage Servicing Rights (MSR)	11	$ 4
Commercial Real Estate [Member]
Servicing Assets at Fair Value [Line Items]
Residential mortgage servicing rights at fair value	$ 91		$ 81

Preferred Stock Issuances (Deta

Preferred Stock Issuances (Details) - USD ($) $ / shares in Units, $ in Millions		Aug. 15, 2029	Sep. 15, 2025	Mar. 31, 2021	Sep. 15, 2024	Dec. 31, 2020
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference, Value				$ 1,850
Preferred stock				$ 1,656		$ 1,656
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1]			6.375%
Preferred Stock, Liquidation Preference, Value				$ 500
Preferred Stock, Liquidation Preference Per Share				$ 1,000
Preferred stock				$ 387		387
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1],[2]			6.375%
Preferred Stock, Liquidation Preference, Value				$ 500
Preferred Stock, Liquidation Preference Per Share				$ 1,000
Preferred stock				$ 433		433
Series C Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1],[3]			5.70%
Preferred Stock, Liquidation Preference, Value				$ 500
Preferred Stock, Liquidation Preference Per Share				$ 1,000
Preferred stock				$ 490		490
Series D Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1],[4]			5.75%
Preferred Stock, Liquidation Preference, Value				$ 350
Preferred Stock, Liquidation Preference Per Share				$ 100,000
Preferred stock				$ 346		$ 346
Forecast [Member] | Series B Preferred Stock Dividend Scenario 1 [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage					6.375%
Forecast [Member] | Series C Preferred Stock Dividend Scenario 1 [Member] [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage		5.70%
Plus 3-Month LIBOR [Member] | Forecast [Member] | Series B Preferred Stock Dividend Scenario 2 [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Basis Spread on Variable Rate, Percentage					3.536%
Plus 3-Month LIBOR [Member] | Forecast [Member] | Series C Preferred Stock Dividend Scenario 2 [Member] [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Basis Spread on Variable Rate, Percentage		3.148%
Plus 5-year Treasury rate [Member] | Forecast [Member] | Series D Preferred Stock Dividend Scenario 1 [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage			5.75%
Plus 5-year Treasury rate [Member] | Forecast [Member] | Series D Preferred Stock Dividend Scenario 2 [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Basis Spread on Variable Rate, Percentage			5.426%
Depositary Shares [Member] | Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference Per Share				$ 25
Depositary Shares [Member] | Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference Per Share				25
Depositary Shares [Member] | Series C Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference Per Share				25
Depositary Shares [Member] | Series D Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference Per Share				$ 1,000
[1]	Dividends on all series of preferred stock, if declared, accrue and are payable quarterly in arrears.
[2]	Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2024, 6.375%, and (ii) for each period beginning on or after September 15, 2024, three-month LIBOR plus 3.536%.
[3]	Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to August 15, 2029, 5.700%, and (ii) for each period beginning on or after August 15, 2029, three-month LIBOR plus 3.148%.
[4]	Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2025, 5.750%, and (ii) for each period beginning on or after September 15, 2025, the five-year treasury rate as of the most recent reset dividend determination date plus 5.426%.

Schedule of Accumulated Other C

Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, Attributable to Parent		$ 1,759	$ (120)
Other Comprehensive Income (Loss), before Tax		(966)	1,891
AOCI before Tax, Attributable to Parent		793	1,771
AOCI Tax, Attributable to Parent	[1]	(444)	30
Unrealized holding gains (losses) on available for sale securities, tax		(138)	151
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		0	0
Other Comprehensive Income (Loss), Tax	[1]	243	(477)
AOCI Tax, Attributable to Parent	[1]	(201)	(447)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		1,315	(90)
Unrealized holding gains (losses) arising during the period on securities available for sale (net of tax)		(410)	446
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		(1)	0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax		(248)	966
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(324)	959
Other comprehensive income, net of tax		(723)	1,414
Accumulated other comprehensive income, net		1,315	(90)	$ 592	$ 1,324
Accumulated Net Unrealized Loss on Held To Maturity Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, Attributable to Parent		(21)	(29)
Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, before Tax	[2]	3	1
AOCI before Tax, Attributable to Parent		(18)	(28)
AOCI Tax, Attributable to Parent	[1]	5	7
Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, Tax	[1],[2]	(1)	0
AOCI Tax, Attributable to Parent	[1]	4	7
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		(16)	(22)
Other Comprehensive Loss, Held-to-maturity Security, Adjustment from AOCI for Accretion of Noncredit Portion of OTTI, after Tax	[2]	2	1
Accumulated other comprehensive income, net		(16)	(22)	(14)	(21)
Accumulated Net Unrealized Securities Available For Sale Gain (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, Attributable to Parent		1,062	274
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax		(548)	597
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	[3]	(1)
Other Comprehensive Income (Loss), before Tax		(549)
AOCI before Tax, Attributable to Parent		513	871
AOCI Tax, Attributable to Parent	[1]	(268)	(69)
Unrealized holding gains (losses) on available for sale securities, tax	[1]	138	(151)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	[1],[3]	0
Other Comprehensive Income (Loss), Tax	[1]	138
AOCI Tax, Attributable to Parent	[1]	(130)	(220)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		794	205
Unrealized holding gains (losses) arising during the period on securities available for sale (net of tax)			446
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	[3]	(1)
Other comprehensive income, net of tax		(411)
Accumulated other comprehensive income, net		794	205	383	651
Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, Attributable to Parent		1,610	430
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		(331)	1,291
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	[2]	(102)	(9)
Other Comprehensive Income (Loss), before Tax		(433)	1,282
AOCI before Tax, Attributable to Parent		1,177	1,712
AOCI Tax, Attributable to Parent	[1]	(406)	(108)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	[1]	83	(325)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	[1],[2]	26	2
Other Comprehensive Income (Loss), Tax	[1]	109	(323)
AOCI Tax, Attributable to Parent	[1]	(297)	(431)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		1,204	322
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			966
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	[2]	(76)	(7)
Other comprehensive income, net of tax			959
Accumulated other comprehensive income, net		1,204	322	880	1,281
Accumulated Defined Benefit Plans Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, Attributable to Parent		(892)	(795)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	[4]	13	11
AOCI before Tax, Attributable to Parent		(879)	(784)
AOCI Tax, Attributable to Parent	[1]	225	200
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	[1],[4]	(3)	(3)
AOCI Tax, Attributable to Parent	[1]	222	197
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		(667)	(595)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	[4]	10	8
Accumulated other comprehensive income, net		$ (667)	$ (595)	$ (657)	$ (587)
[1]	The impact of all AOCI activity is shown net of the related tax impact, calculated using an effective tax rate of approximately 25%.
[2]	Reclassification amount is recognized in net interest income in the consolidated statements of income.
[3]	Reclassification amount is recognized in securities gains (losses), net in the consolidated statements of income
[4]	Reclassification amount is recognized in other non-interest expense in the consolidated statements of income. Additionally, these accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost (see Note 7 for additional details)

Stockholders' Equity And Accu_3

Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($)		May 04, 2021	Mar. 31, 2021	Mar. 31, 2020	May 15, 2029	Sep. 15, 2025	Sep. 15, 2024	Apr. 21, 2021	Dec. 31, 2020	Dec. 15, 2017
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Dividends, Preferred Stock			$ (28,000,000)	$ (23,000,000)
Cash dividend declared (in dollars per share)			$ 0.155	$ 0.155
Preferred stock			$ 1,656,000,000						$ 1,656,000,000
us-gaap_SeriesAandBandCPreferredStockMember
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Dividends, Preferred Stock			$ (23,000,000)	$ (23,000,000)
Series A Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount										$ 113,000,000
PreferredDividendsReductiontoRetainedEarningsatRedemption										100,000,000
PreferredStockIssuanceCostsReductiontoNetIncome										$ 13,000,000
Preferred Stock, Dividend Rate, Percentage	[1]		6.375%
Preferred stock			$ 387,000,000						387,000,000
Preferred Stock, liquidation preference per share (in dollars per share)			$ 1,000
Series A Preferred Stock [Member] | Depositary Shares [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, liquidation preference per share (in dollars per share)			$ 25
Series A Preferred Stock [Member] | Debt Instrument, Redemption, Period One [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, Redemption Terms			90 days
Series B Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1],[2]		6.375%
Preferred stock			$ 433,000,000						433,000,000
Preferred Stock, liquidation preference per share (in dollars per share)			$ 1,000
Series B Preferred Stock [Member] | Depositary Shares [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, liquidation preference per share (in dollars per share)			$ 25
Series C Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1],[3]		5.70%
Preferred stock			$ 490,000,000						490,000,000
Preferred Stock, liquidation preference per share (in dollars per share)			$ 1,000
Series C Preferred Stock [Member] | Depositary Shares [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, liquidation preference per share (in dollars per share)			$ 25
Series D Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Dividends, Preferred Stock			$ (5,000,000)
Preferred Stock, Dividend Rate, Percentage	[1],[4]		5.75%
Preferred stock			$ 346,000,000						$ 346,000,000
Preferred Stock, liquidation preference per share (in dollars per share)			$ 100,000
Series D Preferred Stock [Member] | Depositary Shares [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, liquidation preference per share (in dollars per share)			$ 1,000
Series E Preferred Stock
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, Dividend Rate, Percentage			4.45%
Preferred Stock, liquidation preference per share (in dollars per share)			$ 1,000
Series E Preferred Stock | Depositary Shares [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, liquidation preference per share (in dollars per share)			$ 25
Subsequent Event [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Stock repurchase plan, authorized amount								$ 2,500,000,000
Subsequent Event [Member] | Series B Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount							$ 67,000,000
PreferredDividendsReductiontoRetainedEarningsatRedemption							52,000,000
PreferredStockIssuanceCostsReductiontoNetIncome							$ 15,000,000
Subsequent Event [Member] | Series C Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount					$ 10,000,000
PreferredStockIssuanceCostsReductiontoNetIncome					$ 10,000,000
Subsequent Event [Member] | Series D Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount						$ 4,000,000
PreferredStockIssuanceCostsReductiontoNetIncome						$ 4,000,000
Subsequent Event [Member] | Series E Preferred Stock
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Proceeds from Issuance of Preferred Stock and Preference Stock		$ 400,000,000
[1]	Dividends on all series of preferred stock, if declared, accrue and are payable quarterly in arrears.
[2]	Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2024, 6.375%, and (ii) for each period beginning on or after September 15, 2024, three-month LIBOR plus 3.536%.
[3]	Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to August 15, 2029, 5.700%, and (ii) for each period beginning on or after August 15, 2029, three-month LIBOR plus 3.148%.
[4]	Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2025, 5.750%, and (ii) for each period beginning on or after September 15, 2025, the five-year treasury rate as of the most recent reset dividend determination date plus 5.426%.

Earnings (Loss) Per Common Sh_3

Earnings (Loss) Per Common Share (Computation Of Basic And Diluted Earnings (Loss) Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	3	3
Numerator:
Net income	$ 642	$ 162
Preferred stock dividends	(28)	(23)
Net income available to common shareholders	$ 614	$ 139
Denominator:
Weighted-average common shares outstanding—basic (in shares)	961	957
Potential common shares (in shares)	7	4
Weighted-average common shares outstanding—diluted (in shares)	968	961
Earnings per common share:
Basic (in dollars per share)	$ 0.64	$ 0.15
Diluted (in dollars per share)	$ 0.63	$ 0.14
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	3	3

Pension and Other Postretirem_3

Pension and Other Postretirement Benefits (Schedule of Net Periodic Pension Cost) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 10	$ 10
Interest Cost	13	17
Expected Return on Plan Assets	(35)	(37)
Amortization of Actuarial Loss	13	11
Net Periodic Pension Cost (Credit)	1	1
Pension Plan [Member] | Qualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	9	9
Interest Cost	12	16
Expected Return on Plan Assets	(35)	(37)
Amortization of Actuarial Loss	11	9
Net Periodic Pension Cost (Credit)	(3)	(3)
Supplemental Employee Retirement Plan [Member] | Nonqualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	1	1
Interest Cost	1	1
Expected Return on Plan Assets	0	0
Amortization of Actuarial Loss	2	2
Net Periodic Pension Cost (Credit)	$ 4	$ 4

Derivative Financial Instrume_3

Derivative Financial Instruments and Hedging Activities (Schedule of Derivative Instruments Notional and Fair Value) (Details) - USD ($) $ in Millions		Mar. 31, 2021		Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Notional Amount		$ 129,349		$ 128,614
Derivative Asset, Fair Value, Gross Asset		2,300		3,349
Derivative Liability, Fair Value, Gross Liability		1,233		1,598
Derivative Asset netting adjustments		1,686	[1]	2,428
Derivative Liability, netting adjustments		1,148	[1]	1,545
Derivative Assets	[2]	614		921
Derivative Liabilities	[2]	85		53
Cash Flow Hedge, Floor Premium		51		83
Terminated Cash Flow Hedge Floor Premium		29
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		9,500		10,300
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		23,500		23,850
Derivative Asset, Fair Value, Gross Asset		1,047		1,688
Derivative Liability, Fair Value, Gross Liability		15		0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		105,849		104,764
Derivative Asset, Fair Value, Gross Asset		1,253		1,661
Derivative Liability, Fair Value, Gross Liability		1,218		1,598
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Instrument, Accrued Interest		28		28
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		77,082		76,764
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		1,057	[3]	1,492
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		1,107	[3]	1,464
Interest Rate Floor [Member]
Derivatives, Fair Value [Line Items]
Derivative Instrument, Accrued Interest		9		12
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		15,776		13,806
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[3]	75		90
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	[3]	25		28
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		3,810		4,270
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[3]	38		11
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	[3]	6		26
Other Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		9,181		9,924
Other Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[3]	83		68
Other Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	[3]	80		80
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		1,750		2,100
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		59	[3]	77
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		13	[3]	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		21,750		21,750
Derivative Asset, Fair Value, Gross Asset		988		1,611
Derivative Liability, Fair Value, Gross Liability		2		0
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	[4]	18,000		16,000
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		762	[3]	1,181
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		2	[3]	0
Cash Flow Hedging [Member] | Interest Rate Floor [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	[5],[6]	3,750		5,750
Cash Flow Hedging [Member] | Interest Rate Floor [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[3]	226	[5]	430
Cash Flow Hedging [Member] | Interest Rate Floor [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		0	[3],[5]	0
US Treasury Securities [Member]
Derivatives, Fair Value [Line Items]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		$ 24		$ 24
[1]	Netting adjustments represent amounts recorded to convert derivative assets and derivative liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of cash collateral received or posted, legally enforceable master netting agreements and variation margin that allow Regions to settle derivative contracts with the counterparty on a net basis and to offset the net position with the related cash collateral.
[2]	The gain amounts,which are not collateralized with cash or other assets or reserved for, represent the net credit risk on all trading and other derivative positions. As of March 31, 2021 and December 31, 2020, financial instruments posted of $24 million, for both periods, were not offset in the consolidated balance sheets.
[3]	Derivatives in a gain position are recorded as other assets and derivatives in a loss position are recorded as other liabilities on the consolidated balance sheets.
[4]	Includes accrued interest of $28 million at March 31, 2021 and December 31, 2020, respectively.
[5]	Estimated fair value includes premium of approximately $51 million as of March 31, 2021 and $83 million as of December 31, 2020 to be amortized over the remaining life. Approximately $29 million of the decrease since December 31, 2020 related to hedges that were terminated during the first quarter of 2021 and were not amortized into earnings as of the date of termination.
[6]	Includes accrued interest of $9 million at March 31, 2021 and $12 million at December 31, 2020

Derivative Financial Instrume_4

Derivative Financial Instruments and Hedging Activities (Schedule of Terminated Cash Flows) (Details) - Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income related to discontinued cash flow hedges, before tax	$ 121	$ 78
Other Comprehensive Income (loss), Unrealized Gain (loss) on terminated cash flow hedges arising during the period, before tax	166	(6)
Other Comprehensive Income (loss), Reclassification Adjustment from AOCI on terminated cash flow hedges, before tax	(8)	(2)
Accumulated Other Comprehensive Income related to discontinued cash flow hedges, before tax	$ 279	$ 70

Derivative Financial Instrume_5

Derivative Financial Instruments And Hedging Activities (Schedule Of The Effect Of Derivative Instruments On The Statements Of Operations) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Interest and Fee Income, Loans and Leases Held-in-portfolio		$ 854	$ 903
Long-term borrowings		27	59
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Loans Including Fees in Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives		0	0
Gain or (Loss) Recognized in Income on Derivatives		0	0
Gain or (Loss) Recognized in Income on Related Hedged Item		0	0
Gain (Loss) on Fair Value Hedges Recognized in Earnings		0	0
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Long-term Borrowings In Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives		7	4
Gain or (Loss) Recognized in Income on Derivatives		(22)	77
Gain or (Loss) Recognized in Income on Related Hedged Item		22	(76)
Gain (Loss) on Fair Value Hedges Recognized in Earnings		7	5
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Loans Including Fees in Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from AOCI into Income	[1],[2]	102	9
Net Income (Expense) Recognized on Cash Flow Hedges	[2]	102	9
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Long-term Borrowings In Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from AOCI into Income	[1],[2]	0	0
Net Income (Expense) Recognized on Cash Flow Hedges	[2]	$ 0	$ 0
[1]	Pre-tax
[2]	See Note 5 for gain or (loss) recognized for cash flow hedges in AOCI.

Derivative Financial Instrume_6

Derivative Financial Instruments and Hedging Activities (Schedule of Fair Value Hedging Basis Adjustments) (Details) - Designated as Hedging Item [Member] - Long-term Debt [Member] - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge	$ (1,790)	$ (2,171)
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	$ (42)	$ (64)

Derivative Financial Instrume_7

Derivative Financial Instruments and Hedging Activities (Schedule of Gains (Losses) Recognized Related to Derivatives Not Designated as Hedging Instruments) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	$ 2	$ 80
Capital markets income
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	52	(26)
Capital markets income | Interest Rate Swaps [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	23	(37)
Capital markets income | Interest Rate Options [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	15	16
Capital markets income | Interest Rate Futures And Forward Commitments [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	9	5
Capital markets income | Other Contract [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	5	(10)
Mortgage Income [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	(50)	106
Mortgage Income [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	(67)	98
Mortgage Income [Member] | Interest Rate Options [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	(13)	24
Mortgage Income [Member] | Interest Rate Futures And Forward Commitments [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	$ 30	$ (16)

Derivative Financial Instrume_8

Derivative Financial Instruments And Hedging Activities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 420
Pre-tax net income related to amortization of discontinued cash flow hedges	93
Notional Amount	129,349	$ 128,614
Maximum potential future exposure on swap participations	520
Aggregate fair value of all derivative instruments with credit risk	95	74
Posted collateral related to derivative instruments with credit risk	99	74
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	105,849	104,764
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	894	924
Forward Sale Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	1,800	1,900
Forward Rate Commitments and Futures Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	4,300	$ 4,100
Interest Rate Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value of terminated derivatives	2,000
Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value of terminated derivatives	$ 2,600

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule Of Assets And Liabilities At Fair Value Measured On A Recurring Basis And Non-Recurring Basis) (Details) - USD ($)		Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		$ 27,092,000,000	$ 27,154,000,000
Loans held for sale		1,169,000,000	1,446,000,000
Residential mortgage servicing rights		401,000,000	296,000,000
Derivative Assets	[1]	614,000,000	921,000,000
Derivative Liabilities	[1]	85,000,000	53,000,000
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		27,092,000,000	27,154,000,000
Loans held for sale		1,169,000,000	1,446,000,000
Marketable Equity Securities		443,000,000	388,000,000
Residential mortgage servicing rights		401,000,000	296,000,000
Derivative Assets		2,300,000,000	3,349,000,000
Other Assets, Fair Value Disclosure		0	74,000,000
Derivative Liabilities		1,233,000,000	1,598,000,000
Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale		8,000,000	4,000,000
Security Owned Not Readily Marketable, Fair Value		0	12,000,000
Foreclosed property and other real estate		16,000,000	5,000,000
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		232,000,000	183,000,000
Loans held for sale		0	0
Derivative Assets		1,000,000	2,000,000
Derivative Liabilities		1,000,000	2,000,000
Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		232,000,000	183,000,000
Loans held for sale		0	0
Marketable Equity Securities		443,000,000	388,000,000
Residential mortgage servicing rights		0	0
Derivative Assets		1,000,000	2,000,000
Other Assets, Fair Value Disclosure		0	0
Derivative Liabilities		1,000,000	2,000,000
Level 1 [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale		0	0
Security Owned Not Readily Marketable, Fair Value		0	0
Foreclosed property and other real estate		0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		26,855,000,000	26,966,000,000
Loans held for sale		1,479,000,000	1,901,000,000
Derivative Assets		2,268,000,000	3,303,000,000
Derivative Liabilities		1,228,000,000	1,590,000,000
Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		26,855,000,000	26,966,000,000
Loans held for sale		1,169,000,000	1,446,000,000
Marketable Equity Securities		0	0
Residential mortgage servicing rights		0	0
Derivative Assets		2,268,000,000	3,303,000,000
Other Assets, Fair Value Disclosure		0	74,000,000
Derivative Liabilities		1,228,000,000	1,590,000,000
Level 2 [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale		0	0
Security Owned Not Readily Marketable, Fair Value		0	0
Foreclosed property and other real estate		0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		5,000,000	5,000,000
Loans held for sale		8,000,000	4,000,000
Derivative Assets		31,000,000	44,000,000
Derivative Liabilities		4,000,000	6,000,000
Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	[2]	5,000,000	5,000,000
Loans held for sale		0	0	[2]
Marketable Equity Securities		0	0
Residential mortgage servicing rights		401,000,000	296,000,000
Derivative Assets	[2]	31,000,000	44,000,000
Other Assets, Fair Value Disclosure		0	0
Derivative Liabilities	[2]	4,000,000	6,000,000
Level 3 [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	[2]	8,000,000	4,000,000
Security Owned Not Readily Marketable, Fair Value	[2]	0	12,000,000
Foreclosed property and other real estate	[2]	16,000,000	5,000,000
Interest Rate Swaps [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		1,878,000,000	2,750,000,000
Derivative Liabilities		1,122,000,000	1,464,000,000
Interest Rate Swaps [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		0	0
Derivative Liabilities		0	0
Interest Rate Swaps [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	[3]	1,878,000,000	2,750,000,000
Derivative Liabilities	[3]	1,122,000,000	1,464,000,000
Interest Rate Swaps [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		0	0
Derivative Liabilities		0	0
Interest Rate Options [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		301,000,000	520,000,000
Derivative Liabilities		25,000,000	28,000,000
Interest Rate Options [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		0	0
Derivative Liabilities		0	0
Interest Rate Options [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		270,000,000	477,000,000
Derivative Liabilities		25,000,000	28,000,000
Interest Rate Options [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	[2]	31,000,000	43,000,000
Derivative Liabilities		0	0
Interest Rate Futures And Forward Commitments [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		38,000,000	11,000,000
Derivative Liabilities		6,000,000	26,000,000
Interest Rate Futures And Forward Commitments [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		0	0
Derivative Liabilities		0	0
Interest Rate Futures And Forward Commitments [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		38,000,000	11,000,000
Derivative Liabilities		6,000,000	26,000,000
Interest Rate Futures And Forward Commitments [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		0	0	[2]
Derivative Liabilities		0	0
Other Contract [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		83,000,000	68,000,000
Derivative Liabilities		80,000,000	80,000,000
Other Contract [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		1,000,000	2,000,000
Derivative Liabilities		1,000,000	2,000,000
Other Contract [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		82,000,000	65,000,000
Derivative Liabilities		75,000,000	72,000,000
Other Contract [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	[2]	0	1,000,000
Derivative Liabilities	[2]	4,000,000	6,000,000
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		232,000,000	183,000,000
US Treasury Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		232,000,000	183,000,000
US Treasury Securities [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		232,000,000	183,000,000
US Treasury Securities [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
US Treasury Securities [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Federal Agency Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		98,000,000	105,000,000
Federal Agency Securities [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Federal Agency Securities [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		98,000,000	105,000,000
Federal Agency Securities [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Residential Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		18,846,000,000	19,076,000,000
Residential Agency [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		18,846,000,000	19,076,000,000
Residential Agency [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Residential Agency [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		18,846,000,000	19,076,000,000
Residential Agency [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Residential Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		1,000,000	1,000,000
Residential Non-Agency [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		1,000,000	1,000,000
Residential Non-Agency [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Residential Non-Agency [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Residential Non-Agency [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	[2]	1,000,000	1,000,000
Commercial Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		6,199,000,000	5,999,000,000
Commercial Agency [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		6,199,000,000	5,999,000,000
Commercial Agency [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Commercial Agency [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		6,199,000,000	5,999,000,000
Commercial Agency [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Commercial Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		570,000,000	586,000,000
Commercial Non-Agency [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		570,000,000	586,000,000
Commercial Non-Agency [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Commercial Non-Agency [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		570,000,000	586,000,000
Commercial Non-Agency [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Corporate and other debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		1,146,000,000	1,204,000,000
Corporate and other debt securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		1,146,000,000	1,204,000,000
Corporate and other debt securities [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		0	0
Corporate and other debt securities [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		1,142,000,000	1,200,000,000
Corporate and other debt securities [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	[2]	$ 4,000,000	$ 4,000,000
[1]	The gain amounts,which are not collateralized with cash or other assets or reserved for, represent the net credit risk on all trading and other derivative positions. As of March 31, 2021 and December 31, 2020, financial instruments posted of $24 million, for both periods, were not offset in the consolidated balance sheets.
[2]	All following disclosures related to Level 3 recurring and non-recurring assets do not include those deemed to be immaterial.
[3]	As permitted under U.S. GAAP, variation margin collateral payments made or received for derivatives that are centrally cleared are legally characterized as settled. As such, these derivative assets and derivative liabilities and the related variation margin collateral are presented on a net basis on the balance sheet.

Fair Value Measurements (Rollfo

Fair Value Measurements (Rollforward For Assets And Liabilities Measured At Fair Value On A Recurring Basis With Level 3 Significant Unobservable Inputs) (Details) - Residential Mortgage Servicing Rights [Member] - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening balance		$ 296	$ 345
Gain (Loss) Included in Earnings	[1]	73	(102)
Purchases		32	11
Closing balance		$ 401	$ 254
[1]	Included in mortgage income. Amounts presented exclude offsetting impact from related derivatives.

Fair Value Measurements (Sche_2

Fair Value Measurements (Schedule Of Fair Value Adjustments Related To Non-Recurring Fair Value Measurements) (Details) - Nonrecurring Fair Value Measurements [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Loans Held For Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Adjustment	$ (3)	$ (3)
Equity Investments Without a Readily Determinable Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Adjustment	0	(3)
Foreclosed Property And Other Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Adjustment	$ (7)	$ (9)

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details) - Mortgage Servicing Rights [Member] - Discounted Cash Flow [Member] $ in Millions	Mar. 31, 2021USD ($)		Dec. 31, 2020USD ($)
Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 401	[1]	$ 296	[2]
Recurring Fair Value Measurements [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average CPR	0.054		0.081
Option-Adjusted Spread	4.80%		4.80%
Recurring Fair Value Measurements [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average CPR	0.219		0.312
Option-Adjusted Spread	9.50%		9.50%
Recurring Fair Value Measurements [Member] | Weighted Average [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average CPR	0.102		0.156
Option-Adjusted Spread	5.60%		5.60%
[1]	See Note 4 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights.
[2]	See Note 7 to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2020 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights.

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Option, Fair Value and Unpaid Principal Balance) (Details) - Mortgage loans held for sale [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 1,163		$ 1,439
Fair Value Option Mortgages Held For Sale Aggregate Unpaid Principal	1,136		1,362
Aggregate Fair Value Less Aggregate Unpaid Principal	27		$ 77
Net gains (losses) resulting from changes in fair value	$ (50)	$ 10

Fair Value Measurements (Sche_3

Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($)		Mar. 31, 2021		Dec. 31, 2020
Financial Assets [Abstract]
Debt securities held to maturity		$ 1,131,000,000		$ 1,215,000,000
Debt securities available for sale		27,092,000,000		27,154,000,000
Loans held for sale		1,169,000,000		1,446,000,000
Other earning assets		1,262,000,000		1,217,000,000
Derivative Assets	[1]	614,000,000		921,000,000
Financial Liabilities [Abstract]
Derivative Liabilities	[1]	85,000,000		53,000,000
Capital leases, carrying amount excluded		1,400,000,000		1,500,000,000
Operating leases, carrying amount excluded		188,000,000		200,000,000
Fair Value Premium on Loan Portfolio, Amount		$ 821,000,000		$ 1,200,000,000
Fair Value Premium on Loan Portfolio, Rate		1.00%		1.40%
Recurring Fair Value Measurements [Member]
Financial Assets [Abstract]
Debt securities available for sale		$ 27,092,000,000		$ 27,154,000,000
Loans held for sale		1,169,000,000		1,446,000,000
Derivative Assets		2,300,000,000		3,349,000,000
Other Assets, Fair Value Disclosure		0		74,000,000
Financial Liabilities [Abstract]
Derivative Liabilities		1,233,000,000		1,598,000,000
Carrying Amount [Member]
Financial Assets [Abstract]
Cash and cash equivalents		24,920,000,000		17,956,000,000
Debt securities held to maturity		1,059,000,000		1,122,000,000
Debt securities available for sale		27,092,000,000		27,154,000,000
Loans held for sale		1,487,000,000		1,905,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses		81,335,000,000	[2],[3]	81,597,000,000	[4],[5]
Other earning assets		1,074,000,000	[6]	1,017,000,000	[7]
Derivative Assets		2,300,000,000		3,349,000,000
Other Assets, Fair Value Disclosure				74,000,000
Financial Liabilities [Abstract]
Derivative Liabilities		1,233,000,000		1,598,000,000
Deposits		129,602,000,000		122,479,000,000
Long-term borrowings		2,916,000,000		3,569,000,000
Loan commitments and letters of credit		119,000,000		151,000,000
Estimate of Fair Value [Member]
Financial Assets [Abstract]
Cash and cash equivalents	[8]	24,920,000,000		17,956,000,000
Debt securities held to maturity	[8]	1,131,000,000		1,215,000,000
Debt securities available for sale	[8]	27,092,000,000		27,154,000,000
Loans held for sale	[8]	1,487,000,000		1,905,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses	[2],[3],[8]	82,156,000,000		82,773,000,000
Other earning assets		1,074,000,000	[6],[8]	1,017,000,000	[7],[9]
Derivative Assets	[8]	2,300,000,000		3,349,000,000
Financial Liabilities [Abstract]
Derivative Liabilities	[8]	1,233,000,000		1,598,000,000
Deposits	[8]	129,624,000,000		122,511,000,000
Long-term borrowings	[8]	3,351,000,000		4,063,000,000
Loan commitments and letters of credit	[8]	119,000,000		151,000,000
Level 1 [Member]
Financial Assets [Abstract]
Cash and cash equivalents		24,920,000,000		17,956,000,000
Debt securities held to maturity		0		0
Debt securities available for sale		232,000,000		183,000,000
Loans held for sale		0		0
Loans (excluding leases), net of unearned income and allowance for loan losses		0	[2],[3]	0	[4],[5]
Other earning assets		443,000,000	[6]	388,000,000	[7]
Derivative Assets		1,000,000		2,000,000
Financial Liabilities [Abstract]
Derivative Liabilities		1,000,000		2,000,000
Deposits		0		0
Long-term borrowings		0		0
Loan commitments and letters of credit		0		0
Level 1 [Member] | Recurring Fair Value Measurements [Member]
Financial Assets [Abstract]
Debt securities available for sale		232,000,000		183,000,000
Loans held for sale		0		0
Derivative Assets		1,000,000		2,000,000
Other Assets, Fair Value Disclosure		0		0
Financial Liabilities [Abstract]
Derivative Liabilities		1,000,000		2,000,000
Level 2 [Member]
Financial Assets [Abstract]
Cash and cash equivalents		0		0
Debt securities held to maturity		1,131,000,000		1,215,000,000
Debt securities available for sale		26,855,000,000		26,966,000,000
Loans held for sale		1,479,000,000		1,901,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses		0	[2],[3]	0	[4],[5]
Other earning assets		631,000,000	[6]	629,000,000	[7]
Derivative Assets		2,268,000,000		3,303,000,000
Financial Liabilities [Abstract]
Derivative Liabilities		1,228,000,000		1,590,000,000
Deposits		129,624,000,000		122,511,000,000
Long-term borrowings		3,086,000,000		3,592,000,000
Loan commitments and letters of credit		0		0
Level 2 [Member] | Recurring Fair Value Measurements [Member]
Financial Assets [Abstract]
Debt securities available for sale		26,855,000,000		26,966,000,000
Loans held for sale		1,169,000,000		1,446,000,000
Derivative Assets		2,268,000,000		3,303,000,000
Other Assets, Fair Value Disclosure		0		74,000,000
Financial Liabilities [Abstract]
Derivative Liabilities		1,228,000,000		1,590,000,000
Level 3 [Member]
Financial Assets [Abstract]
Cash and cash equivalents		0		0
Debt securities held to maturity		0		0
Debt securities available for sale		5,000,000		5,000,000
Loans held for sale		8,000,000		4,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses		82,156,000,000	[2],[3]	82,773,000,000	[4],[5]
Other earning assets		0	[6]	0	[7]
Derivative Assets		31,000,000		44,000,000
Financial Liabilities [Abstract]
Derivative Liabilities		4,000,000		6,000,000
Deposits		0		0
Long-term borrowings		265,000,000		471,000,000
Loan commitments and letters of credit		119,000,000		151,000,000
Level 3 [Member] | Recurring Fair Value Measurements [Member]
Financial Assets [Abstract]
Debt securities available for sale	[10]	5,000,000		5,000,000
Loans held for sale		0		0	[10]
Derivative Assets	[10]	31,000,000		44,000,000
Other Assets, Fair Value Disclosure		0		0
Financial Liabilities [Abstract]
Derivative Liabilities	[10]	$ 4,000,000		$ 6,000,000
[1]	The gain amounts,which are not collateralized with cash or other assets or reserved for, represent the net credit risk on all trading and other derivative positions. As of March 31, 2021 and December 31, 2020, financial instruments posted of $24 million, for both periods, were not offset in the consolidated balance sheets.
[2]	Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.4 billion at March 31, 2021.
[3]	The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. The fair value premium on the loan portfolio's net carrying amount at March 31, 2021 was $821 million or 1.0 percent.
[4]	Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.5 billion at December 31, 2020.
[5]	The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. The fair value premium on the loan portfolio's net carrying amount at December 31, 2020 was $1.2 billion or 1.4 percent.
[6]	Excluded from this table is the operating lease carrying amount of $188 million at March 31, 2021
[7]	Excluded from this table is the operating lease carrying amount of $200 million at December 31, 2020.
[8]	Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company makes adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred.
[9]	Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company makes adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred.
[10]	All following disclosures related to Level 3 recurring and non-recurring assets do not include those deemed to be immaterial.

Business Segment Information (S

Business Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)segment	Mar. 31, 2020USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	3
Provision (Credit) for Credit Losses	$ (142)	$ 373
Total non-interest income	641	485
Non-interest expense	928	836
Income tax expense	180	42
Corporate Bank [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	435	352
Provision (Credit) for Credit Losses	79	53
Total non-interest income	193	104
Non-interest expense	267	235
Income before income taxes	282	168
Income tax expense	70	42
Net income	212	126
Average assets	59,492	55,085
Consumer Bank [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	497	538
Provision (Credit) for Credit Losses	73	88
Total non-interest income	331	315
Non-interest expense	529	499
Income before income taxes	226	266
Income tax expense	57	67
Net income	169	199
Average assets	34,053	34,600
Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	35	38
Provision (Credit) for Credit Losses	3	4
Total non-interest income	92	87
Non-interest expense	94	87
Income before income taxes	30	34
Income tax expense	7	9
Net income	23	25
Average assets	2,047	2,060
Other [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	0	0
Provision (Credit) for Credit Losses	(297)	228
Total non-interest income	25	(21)
Non-interest expense	38	15
Income before income taxes	284	(264)
Income tax expense	46	(76)
Net income	238	(188)
Average assets	50,962	33,026
Consolidated [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	967	928
Provision (Credit) for Credit Losses	(142)	373
Total non-interest income	641	485
Non-interest expense	928	836
Income before income taxes	822	204
Income tax expense	180	42
Net income	642	162
Average assets	$ 146,554	$ 124,771

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees (Credit Risk Of Off-Balance Sheet Financial Instruments By Contractual Amounts) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Other Commitments [Line Items]
Unused commitments to extend credit	$ 59,377,000,000	$ 56,644,000,000
Standby Letters Of Credit Commitment	1,660,000,000	1,742,000,000
Commercial letters of credit	72,000,000	132,000,000
Liabilities associated with standby letters of credit	27,000,000	25,000,000
Assets associated with standby letters of credit	27,000,000	25,000,000
Reserve for unfunded credit commitments	$ 92,000,000	$ 126,000,000	$ 105,000,000	$ 45,000,000

Commitments, Contingencies an_4

Commitments, Contingencies and Guarantees (Narrative) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Range of Possible Loss, Portion Not Accrued	$ 20,000,000
Long-term Purchase Commitment [Line Items]
Fannie Mae DUS Servicing Portfolio, Amount	4,600,000,000	$ 4,500,000,000
Maximum Quantifiable Fannie Mae DUS Loss Share Guarantee	1,500,000,000	1,500,000,000
Estimated Fair Value of the Fannie Mae DUS Loss Share Guarantee	$ 5,000,000	$ 5,000,000