Regions Financial (RF) 10-K 24 Feb 21 2020 FY Annual report Financial data

DOCUMENT AND ENTITY INFORMATION

DOCUMENT AND ENTITY INFORMATION - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 22, 2021	Jun. 30, 2020
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
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	2020
Document Fiscal Period Focus	FY
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 Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 10,382,139,803
Entity Common Stock, Shares Outstanding		960,674,032
Documents Incorporated by Reference	Portions of the proxy statement for the Annual Meeting to be held on April 21, 2021 are incorporated by reference into Part III.
Amendment Flag	false
ICFR Auditor Attestation Flag	true
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

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 1,558,000	$ 1,598,000
Interest-bearing deposits in other banks	16,398,000	2,516,000
Debt Securities held to maturity	1,122,000	1,332,000
Debt securities available for sale	27,154,000	22,606,000
Loans held for sale	1,905,000	637,000
Loans, net of unearned income	85,266,000	82,963,000
Allowance for loan losses	(2,167,000)	(869,000)
Net loans	83,099,000	82,094,000
Other earning assets	1,217,000	1,518,000
Premises and equipment, net	1,897,000	1,960,000
Interest receivable	346,000	362,000
Goodwill	5,190,000	4,845,000
Residential mortgage servicing rights at fair value	296,000	345,000
Other identifiable intangible assets, net	122,000	105,000
Other assets	7,085,000	6,322,000
Total assets	147,389,000	126,240,000
Deposits:
Noninterest-bearing Deposit Liabilities	51,289,000	34,113,000
Interest-bearing	71,190,000	63,362,000
Total deposits	122,479,000	97,475,000
Borrowed funds:
Short-term borrowings	0	2,050,000
Long-term borrowings	3,569,000	7,879,000
Total borrowed funds	3,569,000	9,929,000
Other liabilities	3,230,000	2,541,000
Total liabilities	129,278,000	109,945,000
Equity:
Preferred stock	1,656,000	1,310,000
Common stock	10,000	10,000
Additional paid-in capital	12,731,000	12,685,000
Retained earnings	3,770,000	3,751,000
Treasury stock, at cost	(1,371,000)	(1,371,000)
Accumulated other comprehensive income (loss), net	1,315,000	(90,000)
Total shareholders’ equity	18,111,000	16,295,000
Total liabilities and equity	$ 147,389,000	$ 126,240,000

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Securities held to maturity, estimated fair value	$ 1,215	$ 1,372
Debt Securities, Available-for-sale, Amortized Cost	$ 26,092	$ 22,332
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred Stock, Par or Stated Value Per Share	$ 1	$ 1
Common stock, shares authorized	3,000,000,000	3,000,000,000
Common stock, par or stated value per share	$ 0.01	$ 0.01
Common stock, shares, issued	1,001,507,052	998,278,188
Treasury stock, shares	41,032,676	41,032,676
Noncumulative Preferred Stock [Member]
Preferred stock, shares issued	1,850,000	1,500,000
Recurring Fair Value Measurements [Member]
Loans held for sale	$ 1,446	$ 439

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income, including other financing income on:
Loans, including fees		$ 3,610	$ 3,866	$ 3,613
Debt securities		582	643	625
Loans held for sale		28	17	15
Other earning assets		42	70	84
Total interest income		4,262	4,596	4,337
Interest expense on:
Deposits		180	447	250
Short-term borrowings		10	53	30
Long-term borrowings		178	351	322
Total interest expense		368	851	602
Net interest income		3,894	3,745	3,735
Provision for credit losses (1)		1,330	387	229
Net interest income after provision for credit losses (1)		2,564	3,358	3,506
Non-interest income:
Total Noninterest Income		2,393	2,116	2,019
Non-interest expense:
Salaries and employee benefits		2,100	1,916	1,947
Net occupancy expense		313	321	335
Furniture and equipment expense		348	325	325
Other		882	927	963
Total non-interest expense		3,643	3,489	3,570
Income from continuing operations before income taxes		1,314	1,985	1,955
Income tax expense	[1],[2]	220	403	387
Income from continuing operations		1,094	1,582	1,568
Discontinued operations:
Income from discontinued operations before income taxes		0	0	271
Income tax expense		0	0	80
Income from discontinued operations, net of tax		0	0	191
Net income		1,094	1,582	1,759
Net Income from continuing operations available to common shareholders		991	1,503	1,504
Net income available to common shareholders		$ 991	$ 1,503	$ 1,695
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic		959	995	1,092
Diluted		962	999	1,102
Earnings per common share from continuing operations:
Basic		$ 1.03	$ 1.51	$ 1.38
Diluted		1.03	1.50	1.36
Earnings Per Share [Abstract]
Basic		1.03	1.51	1.55
Diluted		$ 1.03	$ 1.50	$ 1.54
Service charges on deposit accounts
Non-interest income:
Total Noninterest Income		$ 621	$ 729	$ 710
Card and ATM fees
Non-interest income:
Total Noninterest Income		438	455	438
Investment management and trust fee income
Non-interest income:
Total Noninterest Income		253	243	235
Capital Markets [Member]
Non-interest income:
Total Noninterest Income		275	178	202
Mortgage income
Non-interest income:
Total Noninterest Income		333	163	137
Securities gains, net [Member]
Non-interest income:
Total Noninterest Income		4	(28)	1
Other [Member]
Non-interest income:
Total Noninterest Income		$ 469	$ 376	$ 296
[1]	Income tax expense includes amortization of affordable housing investments of $133 million, $131 million, and $137 million for 2020, 2019 and 2018, respectively.
[2]	The table above does not include total income tax expense from discontinued operations of zero, zero, and $80 million in 2020, 2019 and 2018, respectively. The deferred income tax expense reflected in discontinued operations was zero, zero and $43 million in 2020, 2019 and 2018, respectively

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other comprehensive income (loss), net of tax:
Net income		$ 1,094	$ 1,582	$ 1,759
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	0
Less: Reclassification Adjustments for Amortization of Unrealized Losses on Securities Transferred to Held to Maturity, Net of Tax		(6)	(5)	(6)
Net change in unrealized losses on securities transferred to held to maturity, net of tax		6	5	6
Unrealized gains (losses) on securities available for sale:
Less: reclassification adjustments for securities gains (losses) realized in net income (net of tax)		3	(21)	0
Net change in unrealized gains (losses) on securities available for sale, net of tax		589	602	(244)
Unrealized gains (losses) on derivative instruments designated as cash flow hedges:
Less: reclassification adjustments for gains (losses) on derivative instruments realized in net income (net of tax)		195	(18)	9
Net change in unrealized gains (losses) on derivative instruments, net of tax		882	385	(12)
Defined benefit pension plans and other post employment benefits:
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax		(36)	(32)	(28)
Net change from defined benefit pension plans and other post employment benefits, net of tax		(72)	(118)	35
Other comprehensive income (loss), net of tax		1,405	874	(215)
Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member]
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax		1,077	367	(3)
Defined benefit pension plans and other post employment benefits:
Other comprehensive income (loss), net of tax			385	(12)
Accumulated Net Unrealized Securities Available For Sale Gain (Loss) [Member]
Unrealized gains (losses) on securities available for sale:
Unrealized holding gains (losses) arising during the period on securities available for sale, net of tax		592	581	(244)
Less: reclassification adjustments for securities gains (losses) realized in net income (net of tax)	[1]	(3)	21
Defined benefit pension plans and other post employment benefits:
Other comprehensive income (loss), net of tax		589	602
Accumulated Defined Benefit Pension Plans Adjustment [Member]
Defined benefit pension plans and other post employment benefits:
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax		(108)	(150)	7
Other comprehensive income (loss), net of tax		(72)	(118)	35
Other Comprehensive Income (Loss) [Member]
Defined benefit pension plans and other post employment benefits:
Comprehensive income		$ 2,499	$ 2,456	$ 1,544
[1]	Reclassification amount is recognized in securities gains (losses), net in the consolidated statements of income.

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Unrealized losses on securities transferred to held to maturity during the period, tax	$ 0	$ 0	$ 0
Amortization of unrealized losses on securities transferred to held to maturity, tax	2	2	3
Unrealized holding gains (losses) on available for sale securities, tax	200	196	(83)
Reclassification adjustments for securities gains (losses) realized in net income, tax	1	(7)	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	363	123	(1)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	65	(6)	3
Net actuarial gains and losses arising during the period, tax	(36)	(50)	4
Reclassification adjustments for amortization of actuarial loss and settlements realized in net income, and other, tax	$ (11)	$ (11)	$ (8)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands, shares in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Deficit) [Member]	Retained Earnings (Deficit) [Member]Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock, At Cost [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance Outstanding (shares) at Dec. 31, 2017			1	1,133
Beginning Balance at Dec. 31, 2017	$ 16,192,000		$ 820,000	$ 12,000	$ 15,858,000	$ 1,628,000		$ (1,377,000)	$ (749,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,759,000					1,759,000
Other comprehensive income (loss), net of tax	(215,000)								(215,000)
Cash dividends declared	(493,000)					(493,000)
Preferred stock dividends	(64,000)					(64,000)
Impact of share repurchase, shares				(115)
Impact of share repurchase, value	(2,122,000)			$ (1,000)	(2,121,000)
Impact of stock transactions under compensation plans, net and other, shares				7
Impact of stock transactions under compensation plans, net and other	35,000				29,000			6,000
Ending Balance Outstanding (shares) at Dec. 31, 2018			1	1,025
Ending Balance at Dec. 31, 2018	15,090,000		$ 820,000	$ 11,000	13,766,000	2,828,000		(1,371,000)	(964,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings							$ (2,000)
Net income	1,582,000					1,582,000
Other comprehensive income (loss), net of tax	874,000								874,000
Cash dividends declared	(582,000)					(582,000)
Preferred stock dividends	(79,000)					(79,000)
Preferred Stock, Shares Issued			1
Proceeds from Issuance of Preferred Stock and Preference Stock	490,000		$ 490,000
Impact of share repurchase, shares				(72)
Impact of share repurchase, value	(1,101,000)			$ (1,000)	(1,100,000)
Impact of stock transactions under compensation plans, net and other, shares				4
Impact of stock transactions under compensation plans, net and other	19,000				19,000			0
Ending Balance Outstanding (shares) at Dec. 31, 2019			2	957
Ending Balance at Dec. 31, 2019	16,295,000		$ 1,310,000	$ 10,000	12,685,000	3,751,000		(1,371,000)	(90,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings	3,751,000						2,000
Net income	1,094,000					1,094,000
Other comprehensive income (loss), net of tax	1,405,000								1,405,000
Cash dividends declared	(595,000)					(595,000)
Preferred stock dividends	(103,000)					(103,000)
Preferred Stock, Shares Issued			0
Proceeds from Issuance of Preferred Stock and Preference Stock	346,000		$ 346,000
Impact of stock transactions under compensation plans, net and other, shares				3
Impact of stock transactions under compensation plans, net and other	46,000				46,000			0
Ending Balance Outstanding (shares) at Dec. 31, 2020			2	960
Ending Balance at Dec. 31, 2020	18,111,000		$ 1,656,000	$ 10,000	$ 12,731,000	$ 3,770,000		$ (1,371,000)	$ 1,315,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings	$ 3,770,000	$ 377,000					$ (377,000)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income	$ 1,094	$ 1,582	$ 1,759
Adjustments to reconcile net income to net cash from operating activities:
Provision for credit losses (1)	1,330	387	229
Depreciation, amortization and accretion, net	421	426	462
Securities (gains) losses, net	(4)	28	(1)
(Gain) on sale of business	0	0	281
Deferred income tax expense (benefit)	(158)	62	226
Originations and purchases of loans held for sale	(6,634)	(4,381)	(3,351)
Proceeds from sales of loans held for sale	5,865	4,144	3,451
(Gain) loss on sale of loans, net	(241)	(124)	(73)
Loss on early extinguishment of debt	22	16	0
Net change in operating assets and liabilities:
Other earning assets	313	158	116
Interest receivable and other assets	(246)	(347)	171
Other liabilities	459	453	(470)
Other	103	177	37
Net cash from operating activities	2,324	2,581	2,275
Investing activities:
Proceeds from maturities of debt securities held to maturity	209	148	174
Proceeds from sales of debt securities available for sale	304	5,372	254
Proceeds from maturities of debt securities available for sale	4,921	3,532	3,383
Purchases of debt securities available for sale	(8,956)	(8,102)	(3,410)
Net proceeds from (payments for) bank-owned life insurance	(1)	(8)	(4)
Proceeds from sales of loans	256	471	307
Purchases of loans	(1,558)	(1,561)	(612)
Net change in loans	546	859	(3,272)
Payments to Acquire Mortgage Servicing Rights (MSR)	(59)	(24)	(71)
Net purchases of other assets	(134)	(178)	(151)
Proceeds from disposition of a business, net of cash transferred	0	0	357
Payments to Acquire Businesses, Net of Cash Acquired	(381)	0	0
Net cash from investing activities	(4,853)	509	(3,045)
Financing activities:
Net change in deposits	25,004	2,984	(2,398)
Net change in short-term borrowings	(2,050)	450	1,100
Proceeds from long-term borrowings	4,698	21,274	21,750
Payments on long-term borrowings	(10,918)	(25,926)	(17,451)
Net proceeds from issuance of preferred stock	346	490	0
Cash dividends on common stock	(595)	(577)	(452)
Cash dividends on preferred stock	(103)	(79)	(64)
Repurchases of common stock	0	(1,101)	(2,122)
Taxes paid related to net share settlement of equity awards	(8)	(29)	(35)
Other	(3)	0	(1)
Net cash from financing activities	16,371	(2,514)	327
Net change in cash and cash equivalents	13,842	576	(443)
Cash and cash equivalents at beginning of year	4,114	3,538	3,981
Cash and cash equivalents at end of year	$ 17,956	$ 4,114	$ 3,538

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES 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 of those 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. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the balance sheet dates and revenues and expenses for the periods presented. Actual results could differ from the estimates and assumptions used in the consolidated financial statements including, but not limited to, the estimates and assumptions related to the allowance for credit losses, fair value measurements, intangibles, residential MSRs and income taxes. Regions has evaluated all subsequent events for potential recognition and disclosure through the filing date of this Annual Report on Form 10-K. During 2020, the Company adopted new accounting guidance related to several topics, including CECL. The cumulative effect of the modified retrospective application of CECL on retained earnings is discussed below. All prior period amounts impacted by guidance that required retrospective application have been revised. Certain amounts in prior period financial statements have been reclassified to conform to the current period presentation, except as otherwise noted. These reclassifications are immaterial and have no effect on net income, comprehensive income (loss), total assets or total shareholders’ equity as previously reported. CECL On January 1, 2020, the Company adopted CECL , which replaces the incurred loss methodology with an expected loss methodology. The measurement of expected losses under CECL is applicable to financial assets measured at amortized cost, including loan receivables and debt securities held to maturity. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor in accordance with accounting guidance on leases. In addition, CECL required changes to the accounting for debt securities available for sale. The adoption of CECL had a material impact to the allowance for credit losses (see below). The cumulative effect of the modified retrospective application for all items in scope was a reduction to retained earnings of $377 million, $375 million of which was attributable to the allowance and $2 million of which was attributable to other financial assets. BASIS OF PRESENTATION AND PRINCIPLES OF CONSOLIDATION The consolidated financial statements include the accounts of Regions, its subsidiaries and certain VIEs. Significant intercompany balances and transactions have been eliminated. Regions considers a voting rights entity to be a subsidiary and consolidates it if Regions has a controlling financial interest in the entity. VIEs are consolidated if Regions has the power to direct the activities of the VIE that significantly impact financial performance and has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE (i.e., Regions is the primary beneficiary). The determination of whether Regions is the primary beneficiary of a VIE is reassessed on an ongoing basis. Investments in companies which are not VIEs but in which Regions has significant influence over the operating and financing decisions, are accounted for using the equity method of accounting. Investments in VIEs, where Regions is not the primary beneficiary of a VIE, are accounted for using either the proportional amortization method or the equity method of accounting. These investments are included in other assets in the consolidated balance sheets. The maximum potential exposure to losses relative to investments in VIEs is generally limited to the sum of the outstanding balance, future funding commitments and any related loans to the entity. Loans to these entities are underwritten in substantially the same manner as are other loans and are generally secured. Refer to Note 2 for additional disclosures regarding Regions’ significant VIEs. Unconsolidated equity investments that do not meet the criteria to be accounted for under the equity method and do not have a readily determinable fair value are accounted for at cost under the measurement alternative with adjustments for impairment and observable price changes as applicable. Cost method investments are included in other assets in the consolidated balance sheets. Dividends received or receivable and observable price changes from these investments are included as a component of other non-interest income in the consolidated statements of income. DISCONTINUED OPERATIONS On April 4, 2018, Regions entered into a stock purchase agreement to sell Regions Insurance Group, Inc. and related affiliates to BB&T Insurance Holdings, Inc. (now Truist Insurance Holdings, Inc). The transaction closed on July 2, 2018. Results of operations for the entities sold are presented separately as discontinued operations for all periods presented on the consolidated statements of income. Other expenses related to the transaction are also included in discontinued operations. See Note 3 and Note 24 for further discussion. CASH EQUIVALENTS AND CASH FLOWS Cash equivalents represent assets that can be converted into cash immediately. At Regions, these assets include cash and due from banks, interest-bearing deposits in other banks, and federal funds sold and securities purchased under agreements to resell. Cash flows from loans, either originated or acquired, are classified at that time according to management’s intent to either sell or hold the loan for the foreseeable future. When management’s intent is to sell the loan, the cash flows of that loan are presented as operating cash flows. When management’s intent is to hold the loan for the foreseeable future, the cash flows of that loan are presented as investing cash flows. The following table summarizes supplemental cash flow information for the years ended December 31: 2020 2019 2018 (In millions) Cash paid during the period for: Interest on deposits and borrowings $ 408 $ 851 $ 581 Income taxes, net 132 85 57 Non-cash transfers: Loans held for sale and loans transferred to other real estate 31 63 54 Loans transferred to loans held for sale 275 66 313 Loans held for sale transferred to loans 1 3 14 Properties transferred to held for sale 33 62 21 SECURITIES PURCHASED UNDER AGREEMENTS TO RESELL AND SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Securities purchased under agreements to resell and securities sold under agreements to repurchase are treated as collateralized financing transactions. It is Regions’ policy to take possession of securities purchased under resell agreements either through direct delivery or a tri-party agreement. DEBT SECURITIES Management determines the appropriate accounting classification of debt securities at the time of purchase, based on intent, and periodically re-evaluates such designations. Debt securities are classified as held to maturity when the Company has the intent and ability to hold the securities to maturity. Debt securities held to maturity are presented at amortized cost. Debt securities not classified as held to maturity are classified as available for sale. Debt securities available for sale are presented at estimated fair value with changes in unrealized gains and losses, net of taxes, reported as a component of accumulated other comprehensive income (loss). See the “Fair Value Measurements” section below for discussion of determining fair value. The amortized cost of debt securities classified as held to maturity and available for sale is adjusted for amortization of premiums and accretion of discounts to maturity, or in the case of mortgage-backed securities, over the estimated life of the security, using the interest method. Such amortization or accretion is included in interest income on securities. Realized gains and losses are included in net securities gains (losses). The cost of securities sold is based on the specific identification method. For debt securities available for sale, the Company reviews its securities portfolio for impairment and determines if impairment is related to credit loss or non-credit loss. In making the assessment of whether a loss is from credit or other factors, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows is less than the amortized cost basis, a credit loss exists and an allowance is created, limited by the amount that the fair value is less than the amortized cost basis. Subsequent activity related to the credit loss component (e.g. write-offs, recoveries) is recognized as part of the allowance for credit losses on debt securities available for sale. Securities held to maturity are evaluated under the allowance for credit losses model. For securities which have an expectation of zero nonpayment of the amortized cost basis (e.g. U.S. Treasury securities or agency securities), the expected credit loss is zero. Refer to Note 4 for further detail and information on securities. LOANS HELD FOR SALE Regions’ loans held for sale include commercial loans, investor real estate loans and residential real estate mortgage loans. Loans held for sale are recorded at either estimated fair value, if the fair value option is elected, or the lower of cost or estimated fair value. Regions has elected to account for residential real estate mortgages originated with the intent to sell at fair value. Intent is established for these conforming residential real estate mortgage loans when Regions enters into an interest rate lock commitment. Gains and losses on these residential mortgage loans held for sale for which the fair value option has been elected are included in mortgage income. Certain commercial loans held for sale where management has elected the fair value option are recorded at fair value. Gains and losses on commercial loans held for sale for which the fair value option has been elected are included in capital markets income. Regions also transfers certain commercial, investor real estate, and residential real estate mortgage portfolio loans to held for sale when management has the intent to sell in the near term. These held for sale loans are recorded at the lower of cost or estimated fair value. At the time of transfer, write-downs on the loans are recorded as charge-offs when credit related and non-interest expense when not credit related and a new cost basis is established. Any subsequent lower of cost or market adjustment is determined on an individual loan basis. Gains and losses on the sale of non-performing commercial and investor real estate loans are included in other non-interest expense. See the “Fair Value Measurements” section below for discussion of determining estimated fair value. LOANS Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are considered loans held for investment (or portfolio loans). Loans held for investment are carried at amortized cost (the principal amount outstanding, net of premiums, discounts, unearned income and deferred loan fees and costs). Regions elected to exclude accrued interest receivable balances from the amortized cost basis. Interest receivable is included as a separate line item on the balance sheet. Regions' loans balance is comprised of commercial, investor real estate and consumer loans. Interest income on all types of loans is accrued based on the contractual interest rate and the principal amount outstanding using methods that approximate the interest method, except for those loans classified as non-accrual. Premiums and discounts on purchased loans and non-refundable loan origination and commitment fees, net of direct costs of originating or acquiring loans, are deferred and recognized over the contractual or estimated lives of the related loans as an adjustment to the loans’ constant effective yield, which is included in interest income on loans. Direct financing, sales-type and leveraged leases are included within the commercial portfolio segment. See Note 5 for further detail and information on loans and Note 14 for further detail on leases. Regions determines past due or delinquency status of a loan based on contractual payment terms. Commercial and investor real estate loans are placed on non-accrual if any of the following conditions occur: 1) collection in full of contractual principal and interest is no longer reasonably assured (even if current as to payment status), 2) a partial charge-off has occurred, unless the loan has been brought current under its contractual terms (original or restructured terms) and the full originally contracted principal and interest is considered to be fully collectible, or 3) the loan is delinquent on any principal or interest for 90 days or more unless the obligation is secured by collateral having a net realizable value (estimated fair value less costs to sell) sufficient to fully discharge the obligation and the loan is in the legal process of collection. Factors considered regarding full collection include assessment of changes in borrower’s cash flow, valuation of underlying collateral, ability and willingness of guarantors to provide credit support, and other conditions. Charge-offs on commercial and investor real estate loans are primarily based on the facts and circumstances of the individual loan and occur when available information confirms the loan is not or will not be fully collectible. Factors considered in making these determinations are the borrower’s and any guarantor’s ability and willingness to pay, the status of the account in bankruptcy court (if applicable), and collateral value. Commercial and investor real estate loan relationships of $250,000 or less are subject to charge-off or charge down to estimated fair value at 180 days past due, based on collateral value. Non-accrual and charge-off decisions for consumer loans are dictated by the FFIEC's Uniform Retail Credit Classification and Account Management Policy which establishes standards for the classification and treatment of consumer loans. The charge-off process drives consumer non-accrual status as follows. If a consumer loan secured by real estate in a first lien position (residential first mortgage or home equity) becomes 180 days past due, Regions evaluates the loan for non-accrual status and potential charge-off based on net loan to value exposure. For home equity loans and lines of credit in a second lien position, the evaluation is performed at 120 days past due. If a loan is secured by collateral having a net realizable value sufficient to fully discharge the obligation, then a partial write-down is not necessary and the loan remains on accrual status, provided it is in the process of legal collection. If a partial charge-off is necessary as a result of the evaluation, then the remaining balance is placed on non-accrual. Consumer loans not secured by real estate are generally charged-off at either 120 days past due for closed-end loans, 180 days past due for open-end loans other than credit cards or the end of the month in which the loan becomes 180 days past due for credit cards. When loans are placed on non-accrual status, the accrual of interest, amortization of loan premium, accretion of loan discount and amortization/accretion of deferred net loan fees/costs are discontinued. When a commercial or investor real estate loan is placed on non-accrual status, uncollected interest accrued in the current year is reversed and charged to interest income. Uncollected interest accrued from prior years on commercial and investor real estate loans placed on non-accrual status in the current year is charged against the allowance for loan losses. When a consumer loan is placed on non-accrual status, all uncollected interest accrued is reversed and charged to interest income due to immateriality. Interest collections on commercial and investor real estate non-accrual loans are applied as principal reductions. Interest collections on consumer loans are recorded using the cash basis, due to immateriality. All loans on non-accrual status may be returned to accrual status and interest accrual resumed if all of the following conditions are met: 1) the loan is brought contractually current as to both principal and interest, 2) future payments are reasonably expected to continue being received in accordance with the terms of the loan and repayment ability can be reasonably demonstrated, and 3) the loan has been performing for at least six months. Purchased Loans Purchased loans are recorded at their fair value at the acquisition date. Purchased loans are evaluated and classified as either PCD, which indicates that the loan has experienced more than insignificant credit deterioration since origination, or non-PCD loans. For PCD loans, the sum of the loans' purchase price and allowance for credit losses, which is determined using the same methodology as originated loans, becomes their initial amortized cost basis. For non-PCD loans, the difference between the fair value and the par value is considered the fair value mark. The non-credit discount or premium related to PCD loans and the fair value mark on non-PCD loans is accreted or amortized into interest income over the contractual life of the loan using the effective interest method. Subsequent changes in the allowance to the PCD and non-PCD loans are recognized in the provision for credit losses. TDRs TDRs are loans in which the borrower is experiencing financial difficulty at the time of restructuring, and Regions has granted a concession to the borrower. TDRs are undertaken in order to improve the likelihood of recovery on the loan and may take the form of modifications made with the stated interest rate lower than the current market rate for new debt with similar risk, other modifications to the structure of the loan that fall outside of normal underwriting policies and procedures, or in limited circumstances forgiveness of principal and/or interest. Insignificant delays in payments are not considered TDRs. TDRs can involve loans remaining on non-accrual, moving to non-accrual, or continuing on accrual status, depending on the individual facts and circumstances of the borrower. TDRs are subject to policies governing accrual/non-accrual evaluation consistent with all other loans of the same product type as discussed in the “Loans” section above. Prior to the adoption of CECL on January 1, 2020, all loans with the TDR designation were considered to be impaired, even if they were accruing. With the adoption of CECL on January 1, 2020, the definition of impaired loans was removed from accounting guidance. The CAP was designed to evaluate potential consumer loan participants as early as possible in the life cycle of the troubled loan (as described in Note 6). Many of the modifications are finalized without the borrower ever reaching the applicable number of days past due, and therefore the loan may never be placed on non-accrual. Accordingly, given the positive impact of the restructuring on the likelihood of recovery of cash flows due under the modified terms, accrual status continues to be appropriate for these loans. As provided in the CARES Act passed into law on March 27, 2020, 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 December 31, 2020 were eligible for relief from TDR classification. Regions elected this provision of the CARES Act; therefore, modified loans that met the required guidelines for relief are not considered TDRs. The CARES 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 December 31, 2020. Further, on December 27, 2020, the Consolidated Appropriations Act was signed into law and extended the relief from TDR classification through January 1, 2022. Regions elected this provision. ALLOWANCE Regions adopted CECL using the modified retrospective method for loans held for investment, net investment in lease assets, and off-balance sheet credit exposures. Regions elected not to estimate an allowance on interest receivable balances because the Company has non-accrual policies in place that provide for the accrual of interest to cease on a timely basis when all contractual amounts due are not expected. The cumulative effect of the retrospective application for loans and unfunded commitments was an increase in the allowance of $501 million and a reduction to retained earnings of $375 million, with the difference being an increase to deferred tax assets. The adoption of CECL on January 1, 2020 replaced the incurred loss methodology to estimate the allowance with the expected loss methodology. Refer to Note 1 "Summary of Significant Accounting Policies" of the Annual Report on Form 10-K for the year ended December 31, 2019, for additional information regarding the accounting and reporting policies related to the incurred loss methodology. Upon the adoption of CECL, the allowance is intended to cover expected credit losses over the contractual life of loans measured at amortized cost, including unfunded commitments. Management’s measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and R&S forecasts that affect the collectability of the reported amount. For periods beyond which Regions makes or obtains such R&S forecasts, Regions reverts to historical credit loss information. Regions maintains an appropriate level of allowance that falls within an acceptable range of estimated losses, measured in accordance with GAAP. Management's determination of the appropriateness of the allowance is based on many factors, including, but not limited to, an evaluation and rating of the loan portfolio; historical loan loss experience; current economic conditions; collateral values securing loans; levels of problem loans; volume, growth, quality and composition of the loan portfolio; regulatory guidance; R&S economic forecasts; and other relevant factors. Changes in any of these factors, assumptions, or the availability of new information, could require that the allowance be adjusted in future periods, perhaps materially. Loss forecasting models are built on historical loss information and then applied to the current portfolio. Outputs from the loss forecasting models in combination with Regions' qualitative framework, and other analyses are used to inform management in its estimation of Regions' expected credit losses. Actual losses could vary, perhaps materially, from management’s estimates. The entire allowance is available to cover all charge-offs that arise from the loan portfolio. Regions' allowance calculation is a significant estimate. Regions uses its best judgment to assess economic conditions and loss data in estimating the CECL allowance and these estimates are subject to periodic refinement based on changes in underlying external or internal data. Therefore, assumptions and decisions driving the estimate may change as conditions change. These assumptions and estimates are detailed below. R & S forecast period During the two-year R&S forecast period, Regions incorporates forward-looking information by utilizing its internally developed and approved Base economic forecast. The scenario is developed by the Chief Economist and approved through a formal governance process. The Base forecast considers market forward/consensus information and is consistent with the Company's organization-wide economic outlook. When appropriate, additional scenarios, including externally created scenarios, are considered as part of the determination of the allowance. Reversion period Regions utilizes an exponential reversion approach that reverts to TTC rates derived from the simple average of all historical quarterly observations for PD, LGD, EAD and prepayment rates. The length of the reversion period differs by class of financing receivable. Historical loss period Regions does not adjust historical loss information for existing economic conditions or expectations of future economic conditions for periods that are beyond the R&S period. Regions utilizes internal historical loss information; however, there are certain loan portfolios that also benefit from the use of external or other reference data due to identified limitations with internal historical data. Contractual life Regions estimates expected credit losses over the contractual life of a loan. Regions defines contractual life for non-revolving loans as contractual maturity, net of estimated prepayments and excluding expected extensions, renewals and modifications unless 1) Regions has a reasonable expectation at the reporting date that it will execute a TDR with the borrower ("RETDR") or 2) extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by Regions. RETDR Regions individually identifies commercial and investor real estate loans for inclusion as RETDRs. The identification criteria are based on internal risk ratings and time to maturity. Regions typically does not identify consumer loans as RETDRs due to the insignificant period between initial contact with a customer regarding a loan modification and when a TDR modification is consummated. The RETDR status extends the life of the loan past the contractual maturity and includes the allowance impact of interest rate concessions. Loans identified as RETDRs will be treated consistently from a modeling/reserving perspective as loans identified as TDRs. Contractual term extensions (borrower versus lender option to renew) Regions' consumer loan contracts do not permit automatic extensions or unilateral customer extensions, and Regions retains the right to approve or deny any extension requested from the borrower. As a result, extensions and renewal options are not included in the life of consumer loans for the purposes of calculating the allowance. Similarly, Regions does not include extension and renewal options in the life of commercial loans for the purposes of calculating the allowance, unless it is a RETDR. Most commercial products do not offer borrowers a unilateral right to renew or extend. Contractual life of credit card receivables Regions estimates the life of credit card receivables based on the amount and timing of payments expected to be collected. Regions' credit card allowance estimate only considers the amount of debt outstanding at the reporting date (the current position) because undrawn balances are unconditionally cancellable and therefore are not considered. Regions classifies credit card accounts into one of three payment patterns: dormant, transacting or revolving. The dormant accounts are idle, carry no balance, and do not contribute to the allowance. The transacting account holders tend to pay the entire balance due every month and are, therefore, subject to practically no interest charges. For transactor accounts, the current position balance is expected to be paid off in one quarter. The revolving accounts tend to be subject to interest charges, and their current position balance liquidates over time. Regions' credit card portfolio is comprised primarily of revolvers. Collateral-dependent loans Regions' collateral-dependent consumer loans are loans secured by collateral (primarily real estate) that meet the partial charge-down requirements disclosed within this section. Regions evaluates significant commercial and investor real estate loans that are in financial difficulty and secured by collateral to determine if they are collateral dependent. For collateral-dependent loans, CECL requires an entity to measure the expected credit losses based on the fair value of the collateral at the reporting date when the entity determines that foreclosure is probable. Additionally, CECL allows a fair value of collateral practical expedient as a measurement approach for loans when the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty ("collateral dependent”). For any collateral-dependent loans that meet Regions' specific allowance criteria (see below), Regions will calculate the CECL allowance based on the fair value of collateral methodology. For collateral-dependent consumer, commercial and investor real estate loans that do not meet Regions' specific allowance criteria (as described below), Regions considers the value of the collateral through the LGD component of the loss model based on collateral type. Credit enhancements Regions' estimate of credit losses reflects how credit enhancements, other than those that are freestanding contracts, mitigate expected credit losses on financial assets. In the event that a credit enhancement arrangement is considered to be a freestanding contract, Regions excludes the credit enhancement from the related loan when estimating expected credit losses. Unfunded commitments and other off-balance sheet items CECL requires an entity to record a liability or allowance for credit losses for the unfunded portion of a loan commitment in the event that the issuer does not have the unconditional right to cancel the commitment. For an unfunded commitment to be considered unconditionally cancellable, Regions must be able to, at any time, with or without cause, refuse to extend credit. The liability is measured over the full contractual period for which Regions is exposed to credit risk through a current obligation to extend credit. In determining the liability, management considers the likelihood that funding will occur, and if funded, the related expected credit losses under the CECL model. Regions' off-balance sheet unfunded commitments in the form of home equity lines, standby letters of credit, commercial letters of credit and commercial revolving products that are deemed to be conditionally cancellable will include unfunded balances within the allowance estimate. Future advances from certain unfunded commitments and other revolving products where Regions does have the unconditional right to cancel these agreements will not be included. CALCULATION OF ALLOWANCE FOR CREDIT LOSSES Pooled allowances The allowance is measured on a collective (pool) basis when similar risk characteristics exist. Segmentation variables for commercial and investor real estate segments include product, loan size, collateral type, risk rating and term. Segmentation variables considered for consumer segments include product, FICO, LTV, age, TDR status, etc. The allowance is estimated for most portfolios and classes using econometric models to estimate expected credit losses. In general, discounted cash flow models are not used for the purpose of estimating expected losses for the purpose of the ACL. Most of the econometric models include PD, LGD, and EAD components. Less complex estimation methods are used for smaller loan portfolios. Specific allowances Due to their size, complexity and individualized risk characteristics and monitoring, the allowance for significant non-accrual commercial and investor real estate loans (including TDRs) and unfunded commitments is measured on an individual basis. Loans evaluated individually are not included in the collective evaluation. Regions generally measures the allowance for these loans based on the present value of estimated cash flows, con

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2020
Disclosure Variable Interest Entities Schedule Of Equity Method Investments [Abstract]
Variable Interest Entities	Regions is involved in various entities that are considered to be VIEs, as defined by authoritative accounting literature. Generally, a VIE is a corporation, partnership, trust or other legal structure that either does not have equity investors with substantive voting rights or has equity investors that do not provide sufficient financial resources for the entity to support its activities. The following discusses the VIEs in which Regions has a significant interest. AFFORDABLE HOUSING TAX CREDIT INVESTMENTS Regions periodically invests in various limited partnerships that sponsor affordable housing projects, which are funded through a combination of debt and equity. These partnerships meet the definition of a VIE. Regions uses the proportional amortization method to account for these investments. Due to the nature of the management activities of the general partner, Regions is not the primary beneficiary of these partnerships. See Note 1 for additional details. Additionally, Regions has loans or letters of credit commitments with certain limited partnerships. The funded portion of the loans and letters of credit are classified as commercial and industrial loans or investor real estate loans as applicable in Note 5. A summary of Regions’ affordable housing tax credit investments and related loans and letters of credit, representing Regions’ maximum exposure to loss as of December 31 is as follows: 2020 2019 (In millions) Affordable housing tax credit investments included in other assets $ 975 $ 932 Unfunded affordable housing tax credit commitments included in other liabilities 249 $ 213 Loans and letters of credit commitments 243 $ 265 Funded portion of loans and letters of credit commitments 130 $ 157 2020 2019 2018 (In millions) Tax credits and other tax benefits recognized $ 164 $ 165 $ 174 Tax credit amortization expense included in provision for income taxes 133 131 137 In addition to the investments discussed above, Regions also syndicates affordable housing investments. In these syndication transactions, Regions creates affordable housing funds in which a subsidiary is the general partner or managing member and sells limited partnership interests to third parties. Regions' general partner or managing member interest represents an insignificant interest in the affordable housing fund. The affordable housing funds meet the definition of a VIE. As Regions is not the primary beneficiary and does not have a significant interest, these investments are not consolidated. At December 31, 2020 and 2019, the value of Regions’ general partnership interest in affordable housing investments was immaterial. OTHER INVESTMENTS Other investments determined to be VIEs include investments in CRA projects, SBICs, and other miscellaneous investments. A summary of Regions' equity method investments representing Regions' maximum exposure to loss as of December 31 is as follows: 2020 2019 (In millions) Gross equity method investments $ 186 $ 176 Unfunded equity method commitments 57 72 Net funded equity method investments included in other assets $ 129 $ 104

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	On July 2, 2018, Regions sold Regions Insurance Group, Inc. and related affiliates. The gain associated with the transaction amounted to $281 million ($196 million after-tax). In connection with the agreement, the results of the entities sold are reported in the Company's consolidated statements of income separately as discontinued operations for all periods presented. On April 2, 2012, Regions sold Morgan Keegan and related affiliates to Raymond James. Regions Investment Management, Inc. (formerly known as Morgan Asset Management, Inc.) and Regions Trust were not included in the sale. In connection with the closing of the sale, Regions agreed to indemnify Raymond James for all litigation matters related to pre-closing activities. See Note 24 for related disclosure. Results of operations for the Morgan Keegan entities sold are presented separately as discontinued operations for all periods presented on the consolidated statements of income. The following table represents the condensed results of operations for the Regions Insurance Group, Inc. entities sold as discontinued operations in 2018: Year Ended December 31, 2018 (In millions) Interest income $ 1 Interest expense — Net interest income 1 Non-interest income: Securities gains (losses), net (1) Insurance commissions and fees 69 Gain on sale of business 281 Other — Total non-interest income 349 Non-interest expense: Salaries and employee benefits 49 Net occupancy expense 3 Furniture and equipment expense 2 Other 16 Total non-interest expense 70 Income from discontinued operations before income taxes 280 Income tax expense 84 Income from discontinued operations, net of tax $ 196 The following table represents the condensed results of operations for both the Regions Insurance Group, Inc. entities and Morgan Keegan and Company, Inc. and related affiliates as discontinued operations: Year Ended December 31 2020 2019 2018 (In millions, except per share data) Income from discontinued operations before income taxes $ — $ — $ 271 Income tax expense — — 80 Income from discontinued operations, net of tax $ — $ — $ 191 Earnings per common share from discontinued operations: Basic $ 0.00 $ 0.00 $ 0.18 Diluted $ 0.00 $ 0.00 $ 0.17

Debt Securities

Debt Securities	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Securities	mortized 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: 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 December 31, 2019 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 $ 736 $ — $ (26) $ 710 $ 22 $ — $ 732 Commercial agency 625 — (3) 622 20 (2) 640 $ 1,361 $ — $ (29) $ 1,332 $ 42 $ (2) $ 1,372 Debt securities available for sale: U.S. Treasury securities $ 180 $ 2 $ — $ 182 $ 182 Federal agency securities 42 1 — 43 43 Mortgage-backed securities: Residential agency 15,336 218 (38) 15,516 15,516 Residential non-agency 1 — — 1 1 Commercial agency 4,720 77 (31) 4,766 4,766 Commercial non-agency 639 8 — 647 647 Corporate and other debt securities 1,414 38 (1) 1,451 1,451 $ 22,332 $ 344 $ (70) $ 22,606 $ 22,606 _________ (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. The amortized cost and estimated fair value of debt securities held to maturity and debt securities available for sale at December 31, 2020, 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 $ 554 $ 569 Commercial agency 589 646 $ 1,143 $ 1,215 Debt securities available for sale: Due in one year or less $ 200 $ 202 Due after one year through five years 828 873 Due after five years through ten years 267 299 Due after ten years 111 118 Mortgage-backed securities: Residential agency 18,455 19,076 Residential non-agency 1 1 Commercial agency 5,659 5,999 Commercial non-agency 571 586 $ 26,092 $ 27,154 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 December 31, 2020 and 2019. 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. 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) December 31, 2019 Less Than Twelve Months Twelve Months or More Total Estimated Gross Estimated Gross Estimated Gross (In millions) Debt securities held to maturity: Mortgage-backed securities: Residential agency $ 82 $ — $ 501 $ (5) $ 583 $ (5) Commercial agency — — 127 (5) 127 (5) $ 82 $ — $ 628 $ (10) $ 710 $ (10) Debt securities available for sale: Mortgage-backed securities: Residential agency $ 2,402 $ (11) $ 2,505 $ (27) $ 4,907 $ (38) Commercial agency 1,449 (31) 73 — 1,522 (31) Corporate and other debt securities 19 — 32 (1) 51 (1) $ 3,870 $ (42) $ 2,610 $ (28) $ 6,480 $ (70) The number of individual debt positions in an unrealized loss position in the tables above decreased from 500 at December 31, 2019 to 129 at December 31, 2020. The decrease in the number of securities and the total amount of gross unrealized losses 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 are shown in the table below. 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 identify a limited number of positions where impairment was believed to exist in certain periods, as shown in the table below. 2020 2019 2018 (In millions) Gross realized gains $ 5 $ 16 $ 4 Gross realized losses (1) (43) (1) Impairment — (1) (2) Securities gains (losses), net $ 4 $ (28) $ 1

Loans

Loans	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Loans	following table presents the distribution of Regions' loan portfolio by segment and class, net of unearned income as of December 31: 2020 2019 (In millions) Commercial and industrial $ 42,870 $ 39,971 Commercial real estate mortgage—owner-occupied 5,405 5,537 Commercial real estate construction—owner-occupied 300 331 Total commercial 48,575 45,839 Commercial investor real estate mortgage 5,394 4,936 Commercial investor real estate construction 1,869 1,621 Total investor real estate 7,263 6,557 Residential first mortgage 16,575 14,485 Home equity lines 4,539 5,300 Home equity loans 2,713 3,084 Indirect—vehicles 934 1,812 Indirect—other consumer 2,431 3,249 Consumer credit card 1,213 1,387 Other consumer 1,023 1,250 Total consumer 29,428 30,567 Total loans, net of unearned income (1) $ 85,266 $ 82,963 _________ (1) Loans are presented net of unearned income, unamortized discounts and premiums and net deferred loan costs of $678 million and $234 million at December 31, 2020 and 2019, respectively. During both 2020 and 2019, Regions purchased approximately $1.6 billion in indirect-other consumer, residential first mortgage and commercial and industrial loans from third parties. The 2020 purchases do not include loans from the Ascentium acquisition. In January 2019, Regions decided to discontinue its indirect auto lending business due to margin compression impacting overall returns on the portfolio. Regions ceased originating new indirect auto loans in the first quarter of 2019 and completed any in-process indirect auto loan closings at the end of the second quarter of 2019. The Company remains in the direct auto lending business. At December 31, 2020, $20.8 billion in securities and net eligible loans held by Regions were pledged to secure current and potential borrowings from the FHLB. At December 31, 2020, an additional $17.6 billion in net eligible loans held by Regions were pledged to the FRB for potential borrowings. See Note 14 for details regarding Regions’ investment in sales-type, direct financing, and leveraged leases included within the commercial and industrial loan portfolio.

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Allowance for Credit Losses	NOTE 6. ALLOWANCE FOR CREDIT LOSSES Regions determines the appropriate level of the allowance on a quarterly basis. The methodology is described in Note 1. On January 1, 2020, Regions adopted CECL, which replaces the incurred loss methodology with an expected loss methodology. Refer to Note 1 for a description of the adoption of CECL and Regions' allowance methodology. Additionally, 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, 2019, for a description of the methodology prior to the adoption of CECL on January 1, 2020. As of December 31, 2020, Regions' total loans included $3.6 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 The cumulative effect of the adoption of CECL on January 1, 2020 for loans and unfunded commitments was an increase in the allowance of $501 million. During 2020, Regions increased the allowance by an additional $878 million to $2.3 billion, which represents management's best estimate of expected losses over the life of the portfolio. The increase was due primarily to higher expected credit losses due to the economic impact and ongoing uncertainty of the COVID-19 pandemic and the purchase of Ascentium. 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 within the CECL models. Regions' models are sensitive to changes in the economic scenario, specifically to the level of unemployment. The December 31, 2020 economic forecast includes a high degree of uncertainty around how long the COVID-19 pandemic will persist, the timeliness and effectiveness of vaccinations and the effectiveness of government relief programs and debt payment relief provided by Regions. These factors cannot be fully reflected in the models. Therefore, the risks to the economic forecast and the model limitations were considered through model adjustments and the qualitative framework. The following tables present analyses of the allowance for credit losses by portfolio segment for the years ended December 31, 2020, 2019 and 2018. The total allowance for loan losses and the related loan portfolio ending balances for the years ended 2019 and 2018 are disaggregated to detail the amounts derived through individual evaluation and collective evaluation for impairment. Prior to 2020, the allowance for loan losses related to individually evaluated loans was attributable to allowances for non-accrual commercial and investor real estate loans and all TDRs ("impaired loans") and the allowance for loan losses related to collectively evaluated loans was attributable to the remainder of the portfolio. With the adoption of CECL on January 1, 2020, the impaired loan designation and disclosures related to impaired loans are no longer required. 2020 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, December 31, 2019 $ 537 $ 45 $ 287 $ 869 Cumulative change in accounting guidance (Note 1) (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 927 129 256 1,312 Initial allowance on acquired PCD loans 60 — — 60 Loan losses: Charge-offs (368) (1) (244) (613) Recoveries 43 3 55 101 Net loan losses (325) 2 (189) (512) Allowance for loan losses, December 31, 2020 $ 1,196 $ 183 $ 788 $ 2,167 Reserve for unfunded credit commitments, December 31, 2019 41 4 — 45 Cumulative change in accounting guidance (Note 1) 36 13 14 63 Reserve for unfunded credit commitments, January 1, 2020 (adjusted for change in accounting guidance) 77 17 14 108 Provision (credit) for unfunded credit losses 20 (3) 1 18 Reserve for unfunded credit commitments, December 31, 2020 97 14 15 126 Allowance for credit losses, December 31, 2020 $ 1,293 $ 197 $ 803 $ 2,293 2019 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, January 1, 2019 $ 520 $ 58 $ 262 $ 840 Provision (credit) for loan losses 138 (16) 265 387 Loan losses: Charge-offs (150) (1) (292) (443) Recoveries 29 4 52 85 Net loan losses (121) 3 (240) (358) Allowance for loan losses, December 31, 2019 537 45 287 869 Reserve for unfunded credit commitments, January 1, 2019 47 4 — 51 Provision (credit) for unfunded credit losses (6) — — (6) Reserve for unfunded credit commitments, December 31, 2019 41 4 — 45 Allowance for credit losses, December 31, 2019 $ 578 $ 49 $ 287 $ 914 Portion of ending allowance for loan losses: Individually evaluated for impairment $ 120 $ 4 $ 29 $ 153 Collectively evaluated for impairment 417 41 258 716 Total allowance for loan losses $ 537 $ 45 $ 287 $ 869 Portion of loan portfolio ending balance: Individually evaluated for impairment $ 537 $ 34 $ 381 $ 952 Collectively evaluated for impairment 45,302 6,523 30,186 82,011 Total loans evaluated for impairment $ 45,839 $ 6,557 $ 30,567 $ 82,963 2018 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, January 1, 2018 $ 591 $ 64 $ 279 $ 934 Provision (credit) for loan losses 32 (5) 202 229 Loan losses: Charge-offs (148) (9) (276) (433) Recoveries 45 8 57 110 Net loan losses (103) (1) (219) (323) Allowance for loan losses, December 31, 2018 520 58 262 840 Reserve for unfunded credit commitments, January 1, 2018 49 4 — 53 Provision (credit) for unfunded credit losses (2) — — (2) Reserve for unfunded credit commitments, December 31, 2018 47 4 — 51 Allowance for credit losses, December 31, 2018 $ 567 $ 62 $ 262 $ 891 Portion of ending allowance for loan losses: Individually evaluated for impairment $ 104 $ 2 $ 26 $ 132 Collectively evaluated for impairment 416 56 236 708 Total allowance for loan losses $ 520 $ 58 $ 262 $ 840 Portion of loan portfolio ending balance: Individually evaluated for impairment $ 490 $ 25 $ 419 $ 934 Collectively evaluated for impairment 44,725 6,411 31,082 82,218 Total loans evaluated for impairment $ 45,215 $ 6,436 $ 31,501 $ 83,152 PORTFOLIO SEGMENT RISK FACTORS The following describe the risk characteristics relevant to each of the portfolio segments. Commercial —The commercial portfolio segment includes commercial and industrial loans to commercial customers for use in normal business operations to finance working capital needs, equipment purchases or other expansion projects. Commercial also includes owner-occupied commercial real estate mortgage loans to operating businesses, which are loans for long-term financing of land and buildings, and are repaid by cash flow generated by business operations. Owner-occupied construction loans are made to commercial businesses for the development of land or construction of a building where the repayment is derived from revenues generated from the business of the borrower. Collection risk in this portfolio is driven by the creditworthiness of underlying borrowers, particularly cash flow from customers’ business operations, and the sensitivity to market fluctuations in commodity prices. Investor Real Estate —Loans for real estate development are repaid through cash flow related to the operation, sale or refinance of the property. This portfolio segment includes extensions of credit to real estate developers or investors where repayment is dependent on the sale of real estate or income generated from the real estate collateral. A portion of Regions’ investor real estate portfolio segment consists of loans secured by residential product types (land, single-family and condominium loans) within Regions’ markets. Additionally, these loans are made to finance income-producing properties such as apartment buildings, office and industrial buildings, and retail shopping centers. Loans in this portfolio segment are particularly sensitive to the valuation of real estate. Consumer —The consumer portfolio segment includes residential first mortgage, home equity lines, home equity loans, indirect-vehicles, indirect-other consumer, consumer credit card, and other consumer loans. Residential first mortgage loans represent loans to consumers to finance a residence. These loans are typically financed over a 15 to 30 year term and, in most cases, are extended to borrowers to finance their primary residence. Home equity lending includes both home equity loans and lines of credit. This type of lending, which is secured by a first or second mortgage on the borrower’s residence, allows customers to borrow against the equity in their home. Real estate market values as of the time the loan or line is secured directly affect the amount of credit extended and, in addition, changes in these values impact the depth of potential losses. Indirect-vehicles lending, which is lending initiated through third-party business partners, largely consists of loans made through automotive dealerships. Indirect-other consumer lending includes other point of sale lending through third parties. Consumer credit card lending includes Regions branded consumer credit card accounts. Other consumer loans include other revolving consumer accounts, direct consumer loans, and overdrafts. Loans in this portfolio segment are sensitive to unemployment and other key consumer economic measures. CREDIT QUALITY INDICATORS The following tables present credit quality indicators for the loan portfolio segments and classes, excluding loans held for sale, as of December 31, 2020. Commercial and investor real estate portfolio segments are detailed by categories related to underlying credit quality and probability of default. Regions assigns these categories 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. These categories are utilized to develop the associated allowance for credit losses. • Pass—includes obligations where the probability of default is considered low; • Special Mention—includes obligations that have potential weakness that may, if not reversed or corrected, weaken the credit or inadequately protect the Company’s position at some future date. Obligations in this category may also be subject to economic or market conditions that may, in the future, have an adverse effect on debt service ability; • Substandard Accrual—includes obligations that exhibit a well-defined weakness that presently jeopardizes debt repayment, even though they are currently performing. These obligations are characterized by the distinct possibility that the Company may incur a loss in the future if these weaknesses are not corrected; • Non-accrual—includes obligations where management has determined that full payment of principal and interest is in doubt. Substandard accrual and non-accrual loans are often collectively referred to as “classified.” Special mention, substandard accrual, and non-accrual loans are often collectively referred to as “criticized and classified.” Regions considers factors such as periodic updates of FICO scores, unemployment rates, home prices, accrual status 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. With the adoption of CECL in 2020, the disclosure of credit quality indicators for loan portfolio segments and classes, excluding loans held for sale, is presented by credit quality indicator by vintage year. Regions defines the vintage date for the purposes of disclosure as the date of the most recent credit decision. In general, renewals are categorized as new credit decisions and reflect the renewal date as the vintage date. Loans that are modified as a TDR are considered to be a continuation of the original loan, therefore the origination date of the original loan is reflected as the vintage date. The following tables present applicable credit quality indicators for the loan portfolio segments and classes, excluding loans held for sale, as of 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, 2019, for disclosure of the Credit Quality Indicators as of December 31, 2019. 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 $ 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 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 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 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 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 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) 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 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. 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 December 31, 2020 and December 31, 2019. Loans on non-accrual status with no related allowance included $112 million of commercial and industrial loans as of December 31, 2020. Non–accrual loans with no related allowance typically include loans where the underlying collateral is deemed sufficient to recover all remaining principal. Prior to the adoption of CECL on January 1, 2020, all TDRs and all non-accrual commercial and investor real estate loans, excluding leases, were deemed to be impaired. The definition of impairment and the required impaired loan disclosures were removed with CECL. Refer to Note 6 "Allowance for Credit Losses" in the Annual Report on Form 10-K for the year ended December 31, 2019 for disclosure of Regions' impaired loans as of December 31, 2019. Loans that have been fully charged-off do not appear in the tables below. 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 2019 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total Total Non-accrual Total (In millions) Commercial and industrial $ 30 $ 21 $ 11 $ 62 $ 39,624 $ 347 $ 39,971 Commercial real estate mortgage—owner-occupied 11 3 1 15 5,464 73 5,537 Commercial real estate construction—owner-occupied 2 — — 2 320 11 331 Total commercial 43 24 12 79 45,408 431 45,839 Commercial investor real estate mortgage 1 1 — 2 4,934 2 4,936 Commercial investor real estate construction — — — — 1,621 — 1,621 Total investor real estate 1 1 — 2 6,555 2 6,557 Residential first mortgage 83 47 136 266 14,458 27 14,485 Home equity lines 30 12 32 74 5,259 41 5,300 Home equity loans 12 6 10 28 3,078 6 3,084 Indirect—vehicles 31 10 7 48 1,812 — 1,812 Indirect—other consumer 16 9 3 28 3,249 — 3,249 Consumer credit card 11 8 19 38 1,387 — 1,387 Other consumer 13 5 5 23 1,250 — 1,250 Total consumer 196 97 212 505 30,493 74 30,567 $ 240 $ 122 $ 224 $ 586 $ 82,456 $ 507 $ 82,963 TROUBLED DEBT RESTRUCTURINGS Regions regularly modifies commercial and investor real estate loans in order to facilitate a workout strategy. Typical modifications include accommodations, such as renewals and forbearances. The majority of Regions’ commercial and investor real estate TDRs are the result of renewals of classified loans at an interest rate that is not considered to be a market interest rate. For smaller dollar commercial loans, Regions may periodically grant interest rate and other term concessions, similar to those under the consumer program described below. Regions works to meet the individual needs of consumer borrowers to stem foreclosure through its CAP. Regions designed the program to allow for customer-tailored modifications with the goal of keeping customers in their homes and avoiding foreclosure where possible. Modification may be offered to any borrower experiencing financial hardship regardless of the borrower’s payment status. Consumer TDRs primarily involve an interest rate concession, however under the CAP, Regions may also offer a short-term deferral, a term extension, a new loan product, or a combination of these options. For loans restructured under the CAP, Regions expects to collect the original contractually due principal. The gross original contractual interest may be collectible, depending on the terms modified. All CAP modifications are considered TDRs regardless of the term because they are concessionary in nature and because the customer documents a financial hardship in order to participate. As noted above, the majority of Regions’ TDRs are results of interest rate concessions and not a forgiveness of principal. Accordingly, the financial impact of the modifications is best illustrated by the impact to the allowance calculation at the loan or pool level, as a result of the loans being considered impaired due to their TDR status. Regions most often does not record a charge-off at the modification date. As provided in the CARES Act passed into law on March 27, 2020, 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 December 31, 2020 were eligible for relief from TDR classification. Regions elected this provision of the CARES Act; therefore, modified loans that met the required guidelines for relief are not considered TDRs and are excluded from the disclosures below. The CARES 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 December 31, 2020. Further, on December 27, 2020, the Consolidated Appropriations Act was signed into law and extended the relief from TDR classification through the earlier of 60 days after the national emergency concerning the COVID-19 outbreak ends or January 1, 2022. Regions elected this provision. 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. 2020 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 151 250 — Commercial real estate mortgage—owner-occupied 21 16 — Commercial real estate construction—owner-occupied 1 1 — Total commercial 173 267 — Commercial investor real estate mortgage 11 78 — Commercial investor real estate construction 4 5 — Total investor real estate 15 83 — Residential first mortgage 378 85 11 Home equity lines — — — Home equity loans 43 4 — Consumer credit card 14 — — Indirect—vehicles and other consumer 66 1 — Total consumer 501 90 11 689 440 11 2019 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 97 $ 259 $ 3 Commercial real estate mortgage—owner-occupied 51 29 — Commercial real estate construction—owner-occupied 1 2 — Total commercial 149 290 3 Commercial investor real estate mortgage 12 26 — Commercial investor real estate construction 12 18 2 Total investor real estate 24 44 2 Residential first mortgage 159 32 4 Home equity lines — — — Home equity loans 99 7 — Consumer credit card 37 — — Indirect—vehicles and other consumer 75 1 — Total consumer 370 40 4 543 $ 374 $ 9

Servicing of Financial Assets

Servicing of Financial Assets	12 Months Ended
	Dec. 31, 2020
Transfers and Servicing of Financial Assets [Abstract]
Servicing of Financial Assets	NOTE 7. 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 for the years ended December 31: 2020 2019 2018 (In millions) Carrying value, beginning of year $ 345 $ 418 $ 336 Additions 108 42 111 Increase (decrease) in fair value: Due to change in valuation inputs or assumptions (89) (62) 18 Economic amortization associated with borrower repayments (1) (68) (53) (47) Carrying value, end of year $ 296 $ 345 $ 418 _________ (1) "Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns. In the first quarter of 2020, Regions revised its MSR decay methodology from a passage of time approach to a discounted net cash flow approach. The change in methodology results in shifts between decay and hedge impacts, but does not impact the overall valuation. In 2020, the Company purchased the rights to service residential mortgage loans on a flow basis for approximately $59 million. In 2019, the Company purchased the rights to service approximately $409 million in residential mortgage loans for approximately $4 million. Additionally, Regions purchased the rights to service residential mortgage loans on a flow basis for approximately $13 million. The Company also sold $167 million of affordable housing residential mortgage loans and as part of the transaction kept the rights to service the loans, which resulted in the retained residential MSR of approximately $2 million. In 2018, the Company purchased the rights to service approximately $6.1 billion in residential mortgage loans for approximately $77 million. Approximately $7 million of the purchase price was paid in 2019. 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) as of December 31 are as follows: 2020 2019 (Dollars in millions) Unpaid principal balance $ 34,454 $ 34,467 Weighted-average CPR (%) 15.6 % 12.0 % Estimated impact on fair value of a 10% increase $ (23) $ (19) Estimated impact on fair value of a 20% increase $ (42) $ (35) Option-adjusted spread (basis points) 560 618 Estimated impact on fair value of a 10% increase $ (7) $ (8) Estimated impact on fair value of a 20% increase $ (13) $ (16) Weighted-average coupon interest rate 3.9 % 4.2 % Weighted-average remaining maturity (months) 287 278 Weighted-average servicing fee (basis points) 27.5 27.3 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 for the years ended December 31: 2020 2019 2018 (In millions) Servicing related fees and other ancillary income $ 95 $ 102 $ 95 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 for additional information. Also see Note 24 for additional information related to the guarantee. As of December 31, 2020 and 2019, the DUS servicing portfolio was approximately $4.5 billion and $3.9 billion, respectively. The related commercial MSRs were approximately $74 million and $59 million at December 31, 2020 and 2019, respectively. The estimated fair value of the commercial MSRs was approximately $81 million and $64 million at December 31, 2020 and December 31, 2019, respectively.

Other Earning Assets

Other Earning Assets	12 Months Ended
	Dec. 31, 2020
Other Earning Assets [Abstract]
Other Earning Assets	Other earning assets consist primarily of investments in FRB stock, FHLB stock, marketable equity securities and operating lease assets. See Note 14 for information related to operating leases. FRB AND FHLB STOCK The following table presents the amount of Regions' investments in FRB and FHLB stock as of December 31: 2020 2019 (In millions) Federal Reserve Bank $ 492 $ 492 Federal Home Loan Bank 15 209 MARKETABLE EQUITY SECURITIES Marketable equity securities carried at fair value, which primarily consist of assets held for certain employee benefits and money market funds, are reported in other earning assets in the consolidated balance sheets. Total marketable equity securities were $388 million and $450 million at December 31, 2020 and 2019, respectively. Unrealized gains recognized in earnings for marketable equity securities still being held by the Company were $12 million at December 31, 2020.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Premises and Equipment	ummary of premises and equipment, net at December 31 is as follows: 2020 2019 (In millions) Land $ 434 $ 446 Premises and improvements 1,678 1,783 Furniture and equipment 1,041 1,023 Software 836 756 Leasehold improvements 413 407 Construction in progress 208 199 4,610 4,614 Accumulated depreciation and amortization (2,713) (2,654) $ 1,897 $ 1,960

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	GOODWILL Goodwill allocated to each reportable segment (each a reporting unit) at December 31 is presented as follows: 2020 2019 (In millions) Corporate Bank $ 2,819 $ 2,474 Consumer Bank 1,978 1,978 Wealth Management 393 393 $ 5,190 $ 4,845 The goodwill allocated to the Corporate Bank reporting unit increased due to the acquisition of Ascentium in the second quarter of 2020. Regions assessed the indicators of goodwill impairment for all three reporting units as part of its annual impairment test, as of October 1, 2020, and through the date of the filing of this Annual Report, by performing a qualitative assessment of goodwill at the reporting unit level. In performing the qualitative assessment, the Company evaluated events and circumstances since the last impairment analysis, recent operating performance including reporting unit performance, changes in market capitalization, regulatory actions and assessments, changes in the business climate, company-specific factors and trends in the banking industry. The results of the qualitative assessment indicated that it was more likely than not that the estimated fair value of each reporting unit exceeded its carrying amount as of the test date; therefore, the quantitative goodwill impairment tests were deemed unnecessary. OTHER INTANGIBLES The following table presents other intangibles and related accumulated amortization as of December 31: 2020 2019 2020 2019 2020 2019 Gross Carrying Amount Accumulated Amortization Net Carrying Amount (In millions) Core deposit intangibles $ 1,011 $ 1,011 $ 991 $ 980 $ 20 $ 31 Purchased credit card relationship assets 175 175 149 140 26 35 Other—amortizing (1) 82 36 24 15 58 21 DUS license (2) 15 15 Other—non-amortizing (3) 3 3 $ 1,268 $ 1,222 $ 1,164 $ 1,135 $ 122 $ 105 _________ (1) Includes intangible assets primarily related to acquired trust services, trade names, intellectual property, customer relationships, and employee agreements. (2) The DUS license is a non-amortizing intangible asset. (3) Includes non-amortizing intangible assets related to other acquired trust services. Core deposit intangibles, purchased credit card relationships and other customer relationship intangibles are being amortized in other non-interest expense on an accelerated basis over their expected useful lives. Other remaining intangibles are amortized in other non-interest expense on a straight line basis over their expected useful lives. Regions purchased a DUS license in 2014. The intangible asset associated with the DUS license is a non-amortizing intangible asset. Refer to Note 7 for additional information related to this license. The aggregate amount of amortization expense for core deposit intangibles, purchased credit card relationship assets, and other intangible assets is estimated as follows: Year Ended December 31 (In millions) 2021 $ 27 2022 22 2023 18 2024 12 2025 8 Identifiable intangible assets other than goodwill are reviewed at least annually, usually in the fourth quarter, for events or circumstances that could impact the recoverability of the intangible asset. Regions concluded that no impairment for any other identifiable intangible assets occurred during 2020, 2019 or 2018.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Deposits	NOTE 11. DEPOSITS The following schedule presents a detail of interest-bearing deposits at December 31: 2020 2019 (In millions) Savings $ 11,635 $ 8,640 Interest-bearing transaction 24,484 20,046 Money market—domestic 29,719 25,326 Time deposits 5,341 7,442 Interest-bearing customer deposits 71,179 61,454 Corporate treasury time deposits 11 108 Corporate treasury other deposits — 1,800 Total interest-bearing deposits $ 71,190 $ 63,362 The aggregate amount of time deposits of $250,000 or more, including certificates of deposit of $250,000 or more, was $696 million at December 31, 2020 and $1.7 billion at December 31, 2019. At December 31, 2020, the aggregate amounts of maturities of all time deposits (deposits with stated maturities, consisting primarily of certificates of deposit and IRAs) were as follows: December 31, 2020 (In millions) 2021 $ 3,721 2022 843 2023 446 2024 149 2025 102 Thereafter 91 $ 5,352

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2020
Long-term Borrowings [Abstract]
Long-Term Borrowings	NOTE 12. BORROWINGS SHORT-TERM BORROWINGS Short-term borrowings consist of FHLB advances and were zero at December 31, 2020 and $2.1 billion at December 31, 2019. The levels of these borrowings can fluctuate depending on the Company's funding needs and the sources utilized. LONG-TERM BORROWINGS Long-term borrowings at December 31 consist of the following: 2020 2019 (In millions) Regions Financial Corporation (Parent): 3.20% senior notes due February 2021 $ 360 $ 358 2.75% senior notes due August 2022 — 997 3.80% senior notes due August 2023 997 996 2.25% senior notes due April 2025 744 — 7.75% subordinated notes due September 2024 100 100 6.75% subordinated debentures due November 2025 155 156 7.375% subordinated notes due December 2037 298 298 Valuation adjustments on hedged long-term debt 64 45 2,718 2,950 Regions Bank: FHLB advances — 2,501 2.75% senior notes due April 2021 190 549 3 month LIBOR plus 0.38% of floating rate senior notes due April 2021 66 350 3.374% senior notes converting to 3 month LIBOR plus 0.50%, callable August 2020, due August 2021 — 499 3 month LIBOR plus 0.50% of floating rate senior notes, callable August 2020, due August 2021 — 499 6.45% subordinated notes due June 2037 496 495 Ascentium note securitizations 97 — Other long-term debt 2 32 Valuation adjustments on hedged long-term debt — 4 851 4,929 Total consolidated $ 3,569 $ 7,879 As of December 31, 2020, Regions had three issuances and Regions Bank had one issuance of subordinated notes totaling $553 million and $496 million, respectively, with stated interest rates ranging from 6.45% to 7.75%. All issuances of these notes are, by definition, subordinated and subject in right of payment of both principal and interest to the prior payment in full of all senior indebtedness of the Company, which is generally defined as all indebtedness and other obligations of the Company to its creditors, except subordinated indebtedness. Payment of the principal of the notes may be accelerated only in the case of certain events involving bankruptcy, insolvency proceedings or reorganization of the Company. The subordinated notes described above qualify as Tier 2 capital under Federal Reserve guidelines, subject to diminishing credit as the respective maturity dates approach and subject to certain transition provisions. None of the subordinated notes are redeemable prior to maturity, unless there is an occurrence of a qualifying capital event. In the second quarter of 2020, Regions issued $750 million of 2.25% senior notes due 2025. Also in the second quarter, Regions executed a partial tender of the two senior bank notes due April 2021. In the third quarter, Regions redeemed the two senior bank notes due August 2021 in their entirety. In the fourth quarter, Regions redeemed the 2.75% senior notes due August 2022 in their entirety. In conjunction with the partial tenders, redemptions, and early terminations of FHLB advances Regions incurred related early extinguishment pre-tax charges totaling $22 million. As a part of Regions' acquisition of Ascentium on April 1, 2020, the Company assumed note securitizations with a remaining balance of $97 million as of December 31, 2020. The Ascentium note securitizations have two classes and have a weighted-average interest rate of 2.12% as of December 31, 2020, with remaining maturities ranging from 3 years to 5 years and a weighted-average of 4.1 years. On January 12, 2021, Regions sent notices of redemption, which resulted in the redemption on January 22, 2021, of its 3.20% senior notes due February 2021 pursuant to their terms, at an aggregate redemption price equal to the sum of 100% of the principal amount of the notes being redeemed and any accrued and unpaid interest to, but excluding, the redemption date. On February 19, 2021, Regions Bank sent notices of redemption, which will result in the redemption on March 1, 2021 of its 2.75% senior bank notes due April 1, 2021 and of its senior floating rate bank notes due April 1, 2021 pursuant to their terms, at an aggregate redemption price equal to the sum of 100% of the principal amount of the notes being redeemed and any accrued and unpaid interest to, but excluding, the redemption date. FHLB advances at December 31, 2019 and 2018 had a weighted-average interest rate of 1.9 percent, and 2.6 percent, respectively. FHLB borrowing capacity is contingent upon the amount of collateral pledged to the FHLB. Regions has pledged certain loans as collateral for the FHLB advances outstanding. See Note 5 for loans pledged to the FHLB at December 31, 2020 and 2019. Additionally, membership in the FHLB requires an institution to hold FHLB stock. See Note 8 for the amount of FHLB stock held at December 31, 2020 and 2019. Regions’ total borrowing capacity with the FHLB (including outstanding advances) as of December 31, 2020, based on assets available for collateral at that date, was approximately $16.2 billion. Regions uses derivative instruments, primarily interest rate swaps, to manage interest rate risk by converting a portion of its fixed-rate debt to a variable-rate. The effective rate adjustments related to these hedges are included in interest expense on long-term borrowings. The weighted-average interest rate on total long-term debt, including the effect of derivative instruments, was 2.7 percent, 3.4 percent, and 3.2 percent for the years ended December 31, 2020, 2019 and 2018, respectively. Further discussion of derivative instruments is included in Note 21. The aggregate amount of contractual maturities of all long-term debt in each of the next five years and thereafter is as follows: Year Ended December 31 Regions Regions (In millions) 2021 $ 360 $ 256 2022 — — 2023 1,061 — 2024 100 40 2025 899 57 Thereafter 298 498 $ 2,718 $ 851 On February 22, 2019, Regions filed a shelf registration statement with the SEC. This shelf registration does not have a capacity limit and can be utilized by Regions to issue various debt and/or equity securities. The registration statement will expire in February 2022. Regions Bank may issue bank notes from time to time, either as part of a bank note program or as stand-alone issuances. Notes issued by Regions Bank may be senior or subordinated notes. Notes issued by Regions Bank are not deposits and are not insured or guaranteed by the FDIC. Regions may, from time to time, consider opportunistically retiring outstanding issued securities, including subordinated debt in privately negotiated or open market transactions. Regulatory approval would be required for retirement of some securities.

Regulatory Capital Requirements

Regulatory Capital Requirements and Restrictions	12 Months Ended
	Dec. 31, 2020
Banking and Thrift, Other Disclosures [Abstract]
Regulatory Capital Requirements and Restrictions	NOTE 13. REGULATORY CAPITAL REQUIREMENTS AND RESTRICTIONS Regions and Regions Bank are required to comply with regulatory capital requirements established by Federal and State banking agencies. These regulatory capital requirements involve quantitative measures of the Company’s assets, liabilities and selected off-balance sheet items, and also qualitative judgments by the regulators. Failure to meet minimum capital requirements can subject the Company to a series of increasingly restrictive regulatory actions. Banking regulations identify five capital categories: well-capitalized, adequately capitalized, undercapitalized, significantly undercapitalized and critically undercapitalized. At December 31, 2020 and 2019, Regions and Regions Bank exceeded all current regulatory requirements, and were classified as "well-capitalized." Management believes that no events or changes have occurred subsequent to December 31, 2020 that would change this designation. Quantitative measures established by regulation to ensure capital adequacy require institutions to maintain minimum ratios of common equity Tier 1, Tier 1, and Total capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital to average tangible assets (the "Leverage" ratio). In the third quarter of 2020, the federal banking agencies finalized a rule related to the impact of CECL in regulatory capital requirements. The rule allows an add-back to the regulatory capital for the impacts of CECL for a two-year period. At the end of the two years, the impact is then phased-in over the following three years. The add-back is calculated as the impact of initial adoption, adjusted for 25 percent of subsequent changes in the allowance. At December 31, 2020, the impact of the addback on CET1 was approximately $582 million, or approximately 54 basis points. The following tables summarize the applicable holding company and bank regulatory capital requirements: December 31, 2020 (1) Minimum Requirement To Be Well Amount Ratio Basel III Regulatory Capital Rules (Dollars in millions) Common equity Tier 1 capital: Regions Financial Corporation $ 10,525 9.84 % 4.50 % N/A Regions Bank 12,972 12.17 4.50 6.50 % Tier 1 capital: Regions Financial Corporation $ 12,181 11.39 % 6.00 % 6.00 % Regions Bank 12,972 12.17 6.00 8.00 Total capital: Regions Financial Corporation $ 14,498 13.56 % 8.00 % 10.00 % Regions Bank 14,803 13.89 8.00 10.00 Leverage capital: Regions Financial Corporation $ 12,181 8.71 % 4.00 % N/A Regions Bank 12,972 9.30 4.00 5.00 % December 31, 2019 Minimum Requirement To Be Well Amount Ratio Basel III Regulatory Capital Rules (Dollars in millions) Common equity Tier 1 capital: Regions Financial Corporation $ 10,228 9.68 % 4.50 % N/A Regions Bank 12,212 11.58 4.50 6.50 % Tier 1 capital: Regions Financial Corporation $ 11,537 10.91 % 6.00 % 6.00 % Regions Bank 12,212 11.58 6.00 8.00 Total capital: Regions Financial Corporation $ 13,406 12.68 % 8.00 % 10.00 % Regions Bank 13,621 12.92 8.00 10.00 Leverage capital: Regions Financial Corporation $ 11,537 9.65 % 4.00 % N/A Regions Bank 12,212 10.24 4.00 5.00 % _________ (1) The 2020 Basel III CET1 capital, Tier 1 capital, Total capital, and Leverage capital ratios are estimated. During the third quarter of 2020, the Federal Reserve finalized Regions' SCB requirement for the fourth quarter of 2020 through the third quarter of 2021 at 3.0 percent. The 3.0 percent requirement represented the amount of capital degradation under the supervisory severely adverse scenario, inclusive of four quarters of planned common stock dividends. The Federal Reserve may decide at any point through March 31, 2021 to update Regions' and other firms' SCB requirement based on the results of its supervisory stress test associated with the capital plan resubmission disclosed in December 2020. The Federal Reserve approved its rule for tailoring enhanced prudential standards for bank holding companies with $100 billion or more in total consolidated assets. The framework outlines tailored standards for matters related to capital and liquidity. Regions is a "Category IV" institution under these rules. Substantially all net assets are owned by subsidiaries. The primary source of operating cash available to Regions is provided by dividends from subsidiaries. Statutory limits are placed on the amount of dividends the subsidiary bank can pay without prior regulatory approval. In addition, regulatory authorities require the maintenance of minimum capital-to-asset ratios at banking subsidiaries. Under the Federal Reserve’s Regulation H, Regions Bank may not, without approval of the Federal Reserve, declare or pay a dividend to Regions if the total of all dividends declared in a calendar year exceeds the total of (a) Regions Bank’s net income for that year and (b) its retained net income for the preceding two calendar years, less any required transfers to additional paid-in capital or to a fund for the retirement of preferred stock. Under Alabama law, Regions Bank may not pay a dividend to Regions in excess of 90 percent of its net earnings until the bank’s surplus is equal to at least 20 percent of capital. Regions Bank is also required by Alabama law to seek the approval of the Alabama Superintendent of Banking prior to paying a dividend to Regions if the total of all dividends declared by Regions Bank in any calendar year will exceed the total of (a) Regions Bank’s net earnings for that year, plus (b) its retained net earnings for the preceding two years, less any required transfers to surplus. The statute defines net earnings as “the remainder of all earnings from current operations plus actual recoveries on loans and investments and other assets, after deducting from the total thereof all current operating expenses, actual losses, accrued dividends on preferred stock, if any, and all federal, state and local taxes.” In addition to dividend restrictions, Federal statutes also prohibit unsecured loans from banking subsidiaries to the parent company. In addition, Regions must adhere to various HUD regulatory guidelines including required minimum capital to maintain their HUD approved status. Failure to comply with the HUD guidelines could result in withdrawal of this certification. As of December 31, 2020, Regions was in compliance with HUD guidelines. Regions is also subject to various capital requirements by secondary market investors.

Leases (Notes)

Leases (Notes)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases of Lessor Disclosure [Text Block]	LESSEE As of December 31, 2020, assets and liabilities recorded under operating leases for properties were $475 million and $545 million, respectively, and $443 million and $514 million, respectively, as of December 31, 2019. The difference between the asset and liability balance is largely driven by increases in rent over the lease term and any strategic decisions to exit a lease location early, resulting in derecognition of the asset. The asset is recorded within other assets, and the lease liability is recorded within other liabilities on the consolidated balance sheets. Lease expense, which is operating lease costs recorded within net occupancy expense in the consolidated statements of income, was $85 and $81 million for the years ended December 31, 2020 and 2019, respectively. Other information related to operating leases at December 31 is as follows: 2020 2019 Weighted-average remaining lease term (years) 9.6 years 9.3 years Weighted-average discount rate (%) 2.7 % 3.2 % Future, undiscounted minimum lease payments on operating leases are as follows: December 31, 2020 (In millions) 2021 $ 99 2022 92 2023 84 2024 70 2025 58 Thereafter 248 Total lease payments 651 Less: Imputed interest 106 Total present value of lease liabilities $ 545 LESSOR The following tables present a summary of Regions' sales-type, direct financing, operating, and leveraged leases for the years ended December 31: Net Interest Income 2020 2019 (In millions) Sales-Type and Direct Financing $ 59 $ 33 Operating 8 11 Leveraged (1) 14 14 $ 81 $ 58 _________ (1) Leveraged lease income is shown pre-tax with related tax expense of $8 million for December 31, 2020 and $9 million for December 31, 2019. Leveraged lease termination gains excluded from amounts presented above were immaterial at both December 31, 2020 and 2019. As of December 31, 2020 Sales-Type and Direct Financing Operating Leveraged Total (In millions) Lease receivable $ 1,293 $ 60 $ 174 $ 1,527 Unearned income (232) (15) (96) (343) Guaranteed residual 36 — — 36 Unguaranteed residual 183 155 144 482 Total net investment $ 1,280 $ 200 $ 222 $ 1,702 As of December 31, 2019 Sales-Type and Direct Financing Operating Leveraged Total (In millions) Lease receivable $ 1,068 $ 113 $ 182 $ 1,363 Unearned income (215) (29) (113) (357) Guaranteed residual 32 — — 32 Unguaranteed residual 152 213 147 512 Total net investment $ 1,037 $ 297 $ 216 $ 1,550 The following table presents the minimum future payments due from customers for sales-type, direct financing, and operating leases: December 31, 2020 Sales-Type and Direct Financing Operating Total (In millions) 2021 $ 297 $ 24 $ 321 2022 236 14 250 2023 178 7 185 2024 118 6 124 2025 76 3 79 Thereafter 388 6 394 $ 1,293 $ 60 $ 1,353

Stockholders' Equity and Accumu

Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)	NOTE 15. SHAREHOLDERS' EQUITY AND ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) PREFERRED STOCK The following table presents a summary of the non-cumulative perpetual preferred stock as of December 31: 2020 2019 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) 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 — $ 1,850 $ 1,656 $ 1,310 _________ (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 $64 million in cash dividends on both Series A and Series B Preferred Stock during both 2020 and 2019. In 2020 and 2019, the Board of Directors declared $28 million and $15 million in cash dividends on Series C Preferred stock, respectively. The initial quarterly dividend for the Series D Preferred Stock was declared in the third quarter of 2020. In 2020, the Board of Directors declared a total of $11 million in cash dividends on Series D preferred stock. In total the Board of Directors declared $103 million and $79 million in cash dividends on preferred stock in 2020 and 2019, respectively. In the event Series A, Series B, Series C, 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. COMMON STOCK On June 25, 2020, the Federal Reserve indicated that the Company exceeded all minimum capital levels under the supervisory stress test. The capital plan submitted to the Federal Reserve reflected no share repurchases through year-end 2020 and Regions is in compliance with the capital plan. Prior to the supervisory stress test submission, the Board had authorized for the repurchase of $1.370 billion of the Company's common stock repurchase plan, permitting repurchases from the beginning of the third quarter of 2019 through the second quarter of 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 first quarter of 2021. Regions declared $0.62 per share in cash dividends for 2020, $0.59 for 2019, and $0.46 for 2018. 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 years ended December 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 on unrealized losses (2) 8 (2) 6 Ending balance $ (21) $ 5 $ (16) Unrealized gains (losses) on securities available for sale: Beginning balance $ 274 $ (69) $ 205 Unrealized holding gains (losses) arising during the period 792 (200) 592 Reclassification adjustments for securities (gains) losses realized in net income (3) (4) 1 (3) Change in AOCI from securities available for sale activity in the period 788 (199) 589 Ending balance $ 1,062 $ (268) $ 794 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 1,440 (363) 1,077 Reclassification adjustments for (gains) losses realized in net income (2) (260) 65 (195) Change in AOCI from derivative activity in the period 1,180 (298) 882 Ending balance $ 1,610 $ (406) $ 1,204 Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (795) $ 200 $ (595) Net actuarial gains (losses) arising during the period (144) 36 (108) Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (4) 47 (11) 36 Change in AOCI from defined benefit pension plans and other post employment benefits activity in the period (97) 25 (72) Ending balance $ (892) $ 225 $ (667) Total other comprehensive income 1,879 (474) 1,405 Total accumulated other comprehensive income, end of period $ 1,759 $ (444) $ 1,315 2019 Pre-tax AOCI Activity Tax Effect (1) Net AOCI Activity (In millions) Total accumulated other comprehensive income (loss), beginning of period $ (1,289) $ 325 $ (964) Unrealized losses on securities transferred to held to maturity: Beginning balance $ (36) $ 9 $ (27) Reclassification adjustments for amortization on unrealized losses (2) 7 (2) 5 Ending balance $ (29) $ 7 $ (22) Unrealized gains (losses) on securities available for sale: Beginning balance $ (531) $ 134 $ (397) Unrealized holding gains (losses) arising during the period 777 (196) 581 Reclassification adjustments for securities (gains) losses realized in net income (3) 28 (7) 21 Change in AOCI from securities available for sale activity in the period 805 (203) 602 Ending balance $ 274 $ (69) $ 205 Unrealized gains (losses) on derivative instruments designated as cash flow hedges: Beginning balance $ (84) $ 21 $ (63) Unrealized holding gains (losses) on derivatives arising during the period 490 (123) 367 Reclassification adjustments for (gains) losses realized in net income (2) 24 (6) 18 Change in AOCI from derivative activity in the period 514 (129) 385 Ending balance $ 430 $ (108) $ 322 Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (638) $ 161 $ (477) Net actuarial gains (losses) arising during the period (200) 50 (150) Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (4) 43 (11) 32 Change in AOCI from defined benefit pension plans and other post employment benefits activity in the period (157) 39 (118) Ending balance $ (795) $ 200 $ (595) Total other comprehensive income 1,169 (295) 874 Total accumulated other comprehensive income (loss), end of period $ (120) $ 30 $ (90) 2018 Pre-tax AOCI Activity Tax Effect (1) Net AOCI Activity (In millions) Total accumulated other comprehensive income (loss), beginning of period $ (1,002) $ 253 $ (749) Unrealized losses on securities transferred to held to maturity: Beginning balance $ (45) 12 $ (33) Reclassification adjustments for amortization on unrealized losses (2) 9 (3) 6 Ending balance $ (36) 9 $ (27) Unrealized gains (losses) on securities available for sale: Beginning balance $ (204) $ 51 $ (153) Unrealized holding gains (losses) arising during the period (327) 83 (244) Ending balance $ (531) $ 134 $ (397) Unrealized gains (losses) on derivative instruments designated as cash flow hedges: Beginning balance $ (68) $ 17 $ (51) Unrealized holding gains (losses) on derivatives arising during the period (4) 1 (3) Reclassification adjustments for (gains) losses realized in net income (2) (12) 3 (9) Change in AOCI from derivative activity in the period (16) 4 (12) Ending balance $ (84) $ 21 $ (63) Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (685) $ 173 $ (512) Net actuarial gains (losses) arising during the period 11 (4) 7 Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (4) 36 (8) 28 Change in AOCI from defined benefit pension plans and other post employment benefits activity in the period 47 (12) 35 Ending balance $ (638) $ 161 $ (477) Total other comprehensive income (287) 72 (215) Total accumulated other comprehensive income (loss), end of period $ (1,289) $ 325 $ (964) ____ (1) The tax impact of each component of AOCI is 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 18 for additional details).

Earnings (Loss) per Common Shar

Earnings (Loss) per Common Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings (Loss) per Common Share	The following table sets forth the computation of basic earnings per common share and diluted earnings per common share for the years ended December 31: 2020 2019 2018 (In millions, except per share data) Numerator: Income from continuing operations $ 1,094 $ 1,582 $ 1,568 Preferred stock dividends (103) (79) (64) Income from continuing operations available to common shareholders 991 1,503 1,504 Income from discontinued operations, net of tax — — 191 Net income available to common shareholders $ 991 $ 1,503 $ 1,695 Denominator: Weighted-average common shares outstanding—basic 959 995 1,092 Potential common shares 3 4 10 Weighted-average common shares outstanding—diluted 962 999 1,102 Earnings per common share from continuing operations available to common shareholders (1) : Basic $ 1.03 $ 1.51 $ 1.38 Diluted 1.03 1.50 1.36 Earnings per common share from discontinued operations (1) : Basic $ 0.00 $ 0.00 $ 0.18 Diluted 0.00 0.00 0.17 Earnings per common share (1) : Basic $ 1.03 $ 1.51 $ 1.55 Diluted 1.03 1.50 1.54 ________ (1) Certain per share amounts may not appear to reconcile due to rounding.

Share-Based Payments

Share-Based Payments	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Share-Based Payments	NOTE 17. SHARE-BASED PAYMENTS Regions administers long-term incentive compensation plans that permit the granting of incentive awards in the form of stock options, restricted stock awards, performance awards and stock appreciation rights. While Regions has the ability to issue stock appreciation rights, none have been issued to date. The terms of all awards issued under these plans are determined by the CHR Committee of the Board; however, no awards may be granted after the tenth anniversary from the date the plans were initially approved by shareholders. Incentive awards usually vest based on employee service, generally within 3 years from the date of the grant. The contractual lives of options granted under these plans are typically ten years from the date of the grant. On April 23, 2015, the shareholders of the Company approved the Regions Financial Corporation 2015 LTIP, which permits the Company to grant to employees and directors various forms of incentive compensation. These forms of incentive compensation are similar to the types of compensation approved in prior plans. The 2015 LTIP authorizes 60 million common share equivalents available for grant, where grants of options and grants of full value awards (e.g., shares of restricted stock, restricted stock units and performance stock units) count as one share equivalent. Unless otherwise determined by the CHR Committee of the Board, grants of restricted stock, restricted stock units, and performance stock units accrue dividends, or their notional equivalent, as they are declared by the Board, and are paid upon vesting of the award. Upon adoption of the 2015 LTIP, Regions closed the prior long-term incentive plan to new grants, and, accordingly, prospective grants must be made under the 2015 LTIP or a successor plan. All existing grants under prior long-term incentive plans are unaffected by adoption of the 2015 LTIP. The number of remaining share equivalents available for future issuance under the 2015 LTIP was approximately 33 million at December 31, 2020. Grants of performance-based restricted stock typically have a three-year performance period, and shares vest within three years after the grant date. Restricted stock units typically have a vesting period of three years. Grantees of restricted stock awards or units must either remain employed with the Company for certain periods from the date of grant in order for shares to be released or issued or retire after meeting the standards of a retiree, at which time shares would be issued and released. The terms of these plans generally stipulate that the exercise price of options may not be less than the fair market value of Regions' common stock at the date the options are granted. Regions issues new shares from authorized reserves upon exercise. The following table summarizes the elements of compensation cost recognized in the consolidated statements of income for the years ended December 31: 2020 2019 2018 (In millions) Compensation cost of share-based compensation awards: Restricted and performance stock awards $ 53 $ 51 $ 50 Tax benefits related to share-based compensation cost (13) (13) (13) Compensation cost of share-based compensation awards, net of tax $ 40 $ 38 $ 37 STOCK OPTIONS The following table summarizes the activity for 2020, 2019 and 2018 related to stock options: Number of Weighted- Aggregate Weighted-Average Remaining Contractual Term Outstanding at December 31, 2017 9,407,898 $ 16.58 $ 35 1.05 years Granted — — Exercised (1,619,206) 7.08 Forfeited or expired (6,063,969) 21.88 Outstanding at December 31, 2018 1,724,723 $ 6.86 $ 11 1.74 years Granted — — Exercised (756,954) 6.93 Forfeited or expired — — Outstanding at December 31, 2019 967,769 $ 6.80 $ 10 0.83 years Granted — — Exercised (911,181) 6.80 Forfeited or expired (29,917) 7.00 Outstanding at December 31, 2020 26,671 $ 6.54 $ — 0.41 years Exercisable at December 31, 2020 26,671 $ 6.54 $ — 0.41 years The aggregate intrinsic value of exercised options was $8 million for 2020, $8 million for 2019, and $10 million for 2018. Cash received from options exercised was $5 million, $5 million, and $11 million in 2020, 2019, and 2018, respectively. The actual tax benefit realized for the tax deductions from options exercised totaled $1 million for 2020, $2 million for 2019, and $4 million for 2018. RESTRICTED STOCK AWARDS AND PERFORMANCE STOCK AWARDS During 2020, 2019 and 2018, Regions made restricted stock grants that vest upon satisfaction of service conditions and restricted stock award and performance stock award grants that vest based upon service conditions and performance conditions. Incremental shares earned above the performance target associated with previous performance stock awards are included when and if performance targets are achieved. Dividend payments during the vesting period are deferred to the end of the vesting term. The fair value of these restricted shares, restricted stock units and performance stock units was estimated based upon the fair value of the underlying shares on the date of the grant. The valuation was not adjusted for the deferral of dividends. Activity related to restricted stock awards and performance stock awards for 2020, 2019 and 2018 is summarized as follows: Number of Weighted-Average Non-vested at December 31, 2017 15,263,034 $ 10.12 Granted 3,051,090 18.17 Vested (6,038,566) 9.64 Forfeited (747,021) 13.00 Non-vested at December 31, 2018 11,528,537 $ 12.32 Granted 3,971,303 14.70 Vested (6,068,969) 8.47 Forfeited (433,513) 15.25 Non-vested at December 31, 2019 8,997,358 $ 15.62 Granted 6,466,526 8.46 Vested (3,314,572) 14.60 Forfeited (467,152) 11.86 Non-vested at December 31, 2020 11,682,160 $ 12.14 As of December 31, 2020, the pre-tax amount of non-vested restricted stock, restricted stock units and performance stock units not yet recognized was $43 million, which will be recognized over a weighted-average period of 1.50 years. The total fair value of shares vested during the years ended December 31, 2020, 2019, and 2018, was $35 million, $89 million, and $112 million, respectively. No share-based compensation costs were capitalized during the years ended December 31, 2020, 2019 or 2018.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Employee Benefit Plans	PENSION AND OTHER POSTRETIREMENT BENEFITS Regions' defined benefit pension plans cover only certain employees as the pension plans are closed to new entrants. Benefits under the pension plans are based on years of service and the employee’s highest five consecutive years of compensation during the last ten years of employment. Regions’ funding policy is to contribute annually at least the amount required by IRS minimum funding standards. Contributions are intended to provide not only for benefits attributed to service to date, but also for those expected to be earned in the future. 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. Actuarially determined pension expense is charged to current operations using the projected unit credit method. All defined benefit plans are referred to as “the plans” throughout the remainder of this footnote. The following table sets forth the plans’ change in benefit obligation, plan assets and funded status, using a December 31 measurement date, and amounts recognized in the consolidated balance sheets at December 31: Qualified Plans Non-qualified Plans Total 2020 2019 2020 2019 2020 2019 (In millions) Change in benefit obligation Projected benefit obligation, beginning of year $ 2,192 $ 1,865 $ 172 $ 145 $ 2,364 $ 2,010 Service cost 34 28 5 3 39 31 Interest cost 64 75 4 5 68 80 Actuarial (gains) losses 278 349 21 33 299 382 Benefit payments (130) (122) (14) (7) (144) (129) Administrative expenses (3) (3) — — (3) (3) Plan settlements — — — (7) — (7) Projected benefit obligation, end of year $ 2,435 $ 2,192 $ 188 $ 172 $ 2,623 $ 2,364 Change in plan assets Fair value of plan assets, beginning of year $ 2,299 $ 2,105 $ — $ — $ 2,299 $ 2,105 Actual return on plan assets 303 319 — — 303 319 Company contributions — — 14 14 14 14 Benefit payments (130) (122) (14) (7) (144) (129) Administrative expenses (3) (3) — — (3) (3) Plan settlements — — — (7) — (7) Fair value of plan assets, end of year $ 2,469 $ 2,299 $ — $ — $ 2,469 $ 2,299 Funded status and accrued benefit (cost) at measurement date $ 34 $ 107 $ (188) $ (172) $ (154) $ (65) Amount recognized in the Consolidated Balance Sheets: Other assets $ 34 $ 107 $ — $ — $ 34 $ 107 Other liabilities — — (188) (172) (188) (172) $ 34 $ 107 $ (188) $ (172) $ (154) $ (65) Pre-tax amounts recognized in Accumulated Other Comprehensive (Income) Loss: Net actuarial loss $ 819 $ 736 $ 80 $ 66 $ 899 $ 802 The accumulated benefit obligation for the qualified plans was $2.3 billion and $2.1 billion as of December 31, 2020 and 2019, respectively. Total plan assets exceeded the corresponding accumulated benefit obligation for the qualified plans as of both December 31, 2020 and 2019. The accumulated benefit obligation for the non-qualified plans was $188 million and $171 million as of December 31, 2020 and 2019, respectively, which exceeded all corresponding plan assets for each period. As of December 31, 2020 and 2019, the actuarial (gains) losses related to the change in the benefit obligation were primarily driven by changes in the discount rate. Net periodic pension cost (benefit) included the following components for the years ended December 31: Qualified Plans Non-qualified Plans Total 2020 2019 2018 2020 2019 2018 2020 2019 2018 (In millions) Service cost $ 34 $ 28 $ 35 $ 5 $ 3 $ 3 $ 39 $ 31 $ 38 Interest cost 64 75 70 4 5 5 68 80 75 Expected return on plan assets (148) (137) (153) — — — (148) (137) (153) Amortization of actuarial loss 39 36 31 8 5 5 47 41 36 Settlement charge — — — — 2 — — 2 — Net periodic pension (benefit) cost $ (11) $ 2 $ (17) $ 17 $ 15 $ 13 $ 6 $ 17 $ (4) The service cost component of net periodic pension (benefit) cost 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. The settlement charges relate to the settlement of liabilities under the SERP for certain plan participants. The assumptions used to determine benefit obligations at December 31 are as follows: Qualified Plans Non-qualified Plans 2020 2019 2020 2019 Discount rate 2.48 % 3.35 % 2.07 % 3.05 % Rate of annual compensation increase 4.00 % 4.00 % 3.00 % 3.00 % The weighted-average assumptions used to determine net periodic pension (benefit) cost for the years ended December 31 are as follows: Qualified Plans Non-qualified Plans 2020 2019 2018 2020 2019 2018 Discount rate 3.37 % 4.39 % 3.70 % 3.00 % 4.18 % 3.49 % Expected long-term rate of return on plan assets 6.65 % 6.84 % 6.84 % N/A N/A N/A Rate of annual compensation increase 4.00 % 3.75 % 3.75 % 3.00 % 3.75 % 3.75 % Regions utilizes a disaggregated approach in the estimation of the service and interest components of net periodic pension costs by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. This provides a more precise measurement of service and interest costs by improving the correlation between projected benefit cash flows and the corresponding spot yield curve rates. The expected long-term rate of return on the qualified plans' assets is based on an estimated reasonable range of probable returns. The assumption is established by considering historical and anticipated return of the asset classes invested in by the qualified plans and the allocation strategy currently in place among those classes. Management chose a point within the range based on the probability of achievement combined with incremental returns attributable to active management. For 2021, the expected long-term rate of return on plan assets is 5.87 percent. The qualified plans' investment strategy is continuing to shift from focusing on maximizing asset returns to minimizing funding ratio volatility, with a planned increase in the allocation to fixed income securities. The combined target asset allocation is 50 percent equities, 38 percent fixed income securities and 12 percent in all other types of investments. Equity securities include investments in large and small/mid cap companies primarily located in the U.S., international equities, and private equities. Fixed income securities include investments in corporate and government bonds, asset-backed securities and any other fixed income investments as allowed by respective prospectuses and other offering documents. Other types of investments may include hedge funds and real estate funds that follow several different strategies. The plans' assets are highly diversified with respect to asset class, security and manager. Investment risk is controlled with the plans' assets rebalancing to target allocations on a periodic basis and continual monitoring of investment managers’ performance relative to the investment guidelines established with each investment manager. Regions’ qualified plans have a portion of their investments in Regions' common stock. At December 31, 2020, the plans held 2,855,618 shares, which represents a total market value of approximately $46 million, or approximately 2 percent of the plans' assets. The following table presents the fair value of Regions’ qualified pension plans’ financial assets as of December 31: 2020 2019 Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Fair Value (In millions) Cash and cash equivalents $ 50 $ — $ — $ 50 $ 25 $ — $ — $ 25 Fixed income securities: U.S. Treasury securities $ 299 $ — $ — $ 299 $ 481 $ — $ — $ 481 Federal agency securities — 18 — 18 — 26 — 26 Corporate bonds — 490 — 490 — 111 — 111 Total fixed income securities $ 299 $ 508 $ — $ 807 $ 481 $ 137 $ — $ 618 Equity securities: Domestic $ 130 $ — $ — $ 130 $ 346 $ — $ — $ 346 International 164 — — 164 176 — — 176 Total equity securities $ 294 $ — $ — $ 294 $ 522 $ — $ — $ 522 International mutual funds $ 179 $ — $ — $ 179 $ 181 $ — $ — $ 181 Total assets in the fair value hierarchy $ 822 $ 508 $ — $ 1,330 $ 1,209 $ 137 $ — $ 1,346 Collective trust funds: Fixed income fund (1) $ 408 $ 440 Common stock fund (1) 217 178 International fund (1) 46 47 Total collective trust funds $ 671 $ 665 Real estate funds measured at NAV (1) $ 188 $ 187 Private equity funds measured at NAV (1) $ 280 $ 101 $ 2,469 $ 2,299 __________ (1) In accordance with accounting guidance, investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient are not required to be classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of amounts reported in the fair value hierarchy to amounts reported on the balance sheet. For all investments, the plans attempt to use quoted market prices of identical assets on active exchanges, or Level 1 measurements. Where such quoted market prices are not available, the plans typically employ quoted market prices of similar instruments (including matrix pricing) and/or discounted cash flows to estimate a value of these securities, or Level 2 measurements. Level 2 discounted cash flow analyses are typically based on market interest rates, prepayment speeds and/or option adjusted spreads. Investments held in the plans consist of cash and cash equivalents, fixed income securities, equity securities, collective trust funds, hedge funds, real estate funds, private equity and other assets and are recorded at fair value on a recurring basis. See Note 1 for a description of valuation methodologies related to U.S. Treasuries, federal agency securities, and equity securities. The methodology described in Note 1 for other debt securities is applicable to corporate bonds. Mutual funds are valued based on quoted market prices of identical assets on active exchanges; these valuations are Level 1 measurements. Collective trust funds, hedge funds, real estate funds, private equity funds and other assets are valued based on net asset value or the valuation of the limited partner’s portion of the equity of the fund. Third party fund managers provide these valuations based primarily on estimated valuations of underlying investments. Information about the expected cash flows for the qualified and non-qualified plans is as follows: Qualified Plans Non-qualified Plans (In millions) Expected Employer Contributions: 2021 $ — $ 33 Expected Benefit Payments: 2021 $ 138 $ 33 2022 138 31 2023 136 15 2024 138 11 2025 137 12 Next five years 673 57 OTHER PLANS Regions has a defined-contribution 401(k) plan that includes a Company match of eligible employee contributions. Eligible employees include those who have been employed for one year and have worked a minimum of 1,000 hours. The Company match is invested based on the employees' allocation elections. Regions provides an automatic 2 percent cash 401(k) contribution to eligible employees regardless of whether or not they are contributing to the 401(k) plan. To receive this contribution, employees must be employed at the end of the year and not actively accruing a benefit in the Regions’ pension plans. Regions’ cash contribution was approximately $19 million for 2020, $17 million for 2019 and $18 million for 2018. For 2020 and 2019, eligible employees who were already contributing to the 401(k) plan received up to a 5 percent Company match plus the automatic 2 percent cash contribution. In 2018, eligible employees who were already contributing to the 401(k) plan received up to a 4 percent Company match plus the automatic 2 percent cash contribution. Regions’ match to the 401(k) plan on behalf of employees totaled $62 million in 2020, $58 million in 2019, and $48 million in 2018. Regions’ 401(k) plan held 20 million shares and 21 million shares of Regions' common stock at December 31, 2020 and 2019, respectively. The 401(k) plan received approximately $12 million, $13 million and $10 million in dividends on Regions' common stock for the years ended December 31, 2020, 2019 and 2018, respectively.

Other Non-Interest Income and E

Other Non-Interest Income and Expense	12 Months Ended
	Dec. 31, 2020
Other Income and Expenses [Abstract]
Other Non-Interest Income and Expense	The following is a detail of other non-interest income from continuing operations for the years ended December 31: 2020 2019 2018 (In millions) Bank-owned life insurance 95 78 65 Investment services fee income $ 84 $ 79 $ 71 Commercial credit fee income 77 73 71 Valuation gain on equity investment (1) 50 — — Market value adjustments on employee benefit assets - defined benefit — 5 (6) Market value adjustments on employee benefit assets- other 12 11 (5) Other miscellaneous income 151 130 100 $ 469 $ 376 $ 296 ______ (1) In the third quarter of 2020, the equity investee executed an initial public offering. The Company was subject to a conventional post-issuance 180 day lock-up period, which prevented the sale of its position until January 2021. The Company sold its position in January 2021 and recognized an immaterial gain. The following is a detail of other non-interest expense from continuing operations for the years ended December 31: 2020 2019 2018 (In millions) Outside services $ 170 $ 189 $ 187 Marketing 94 97 92 Professional, legal and regulatory expenses 89 95 119 Credit/checkcard expenses 50 68 57 FDIC insurance assessments 48 48 85 Branch consolidation, property and equipment charges 31 25 11 Visa class B shares expense 24 14 10 Loss on early extinguishment of debt 22 16 — Provision (credit) for unfunded credit losses (1) — (6) (2) Other miscellaneous expenses 354 381 404 $ 882 $ 927 $ 963 ______ (1) Upon adoption of CECL on January 1, 2020, the provision for credit losses presented within net interest income after provision for credit losses is the sum of the provision for loan losses and the provision for unfunded credit commitments. Prior to the adoption of CECL, the provision for unfunded commitments was included in other non-interest expense.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Taxes [Abstract]
Income Taxes	NOTE 20. INCOME TAXES The components of income tax expense from continuing operations for the years ended December 31 were as follows: 2020 2019 2018 (In millions) Current income tax expense: Federal $ 312 $ 279 $ 175 State 66 62 29 Total current expense $ 378 $ 341 $ 204 Deferred income tax expense (benefit): Federal $ (142) $ 29 $ 130 State (16) 33 53 Total deferred expense (benefit) $ (158) $ 62 $ 183 Total income tax expense $ 220 $ 403 $ 387 __________ Note: The table above does not include total income tax expense from discontinued operations of zero, zero, and $80 million in 2020, 2019 and 2018, respectively. The deferred income tax expense reflected in discontinued operations was zero, zero and $43 million in 2020, 2019 and 2018, respectively. On December 22, 2017, Tax Reform was enacted. Effective January 1, 2018, Tax Reform reduced the maximum corporate statutory federal income tax rate from 35 percent to 21 percent. During 2018, the Company made the determination to and completed administrative filings with the Internal Revenue Service that allowed it to accelerate various deductions into the prior year. As a result, the Company recognized during the 2018 measurement period approximately $37 million in tax benefits due to Tax Reform. The measurement period ended in December 2018. Income tax expense does not reflect the tax effects of unrealized losses on securities transferred to held to maturity, unrealized gains and losses on securities available for sale, unrealized gains and losses on derivative instruments and the net change from defined benefit pension plans and other postretirement benefits. Refer to Note 15 for additional information on shareholders' equity and accumulated other comprehensive income (loss). The Company accounts for investment tax credits using the deferral method. Investment tax credits generated totaled $94 million, $59 million and $90 million for 2020, 2019 and 2018, respectively. Income taxes from continuing operations for financial reporting purposes differs from the amount computed by applying the statutory federal income tax rate of 21 percent for the years ended December 31, 2020, 2019, and 2018, as shown in the following table: 2020 2019 2018 (Dollars in millions) Tax on income from continuing operations computed at statutory federal income tax rate $ 276 $ 417 $ 410 Increase (decrease) in taxes resulting from: State income tax, net of federal tax effect 39 75 65 Tax-exempt interest (34) (39) (37) Affordable housing investment amortization, net of tax benefits (excluding Tax Reform) (31) (34) (37) Other impacts of Tax Reform — — (37) Non-deductible expenses 22 19 28 Bank-owned life insurance (22) (19) (16) Impact of change in unrecognized tax benefits (20) 20 — Lease financing 5 5 11 Other, net (15) (41) — Income tax expense $ 220 $ 403 $ 387 Effective tax rate 16.8 % 20.3 % 19.8 % __________ Note: Income tax expense includes amortization of affordable housing investments of $133 million, $131 million, and $137 million for 2020, 2019 and 2018, respectively. Significant components of the Company’s net deferred tax liability at December 31 are listed below: 2020 2019 (In millions) Deferred tax assets: Allowance for credit losses (1) $ 573 $ 231 Right of use liability 137 124 Federal and State net operating losses, net of federal tax effect 58 50 Unrealized losses included in shareholder's equity — 30 Accrued expenses 35 30 Federal tax credit carryforwards — 12 Other 13 16 Total deferred tax assets 816 493 Less: valuation allowance (31) (32) Total deferred tax assets less valuation allowance 785 461 Deferred tax liabilities: Unrealized gains included in shareholder's equity 444 — Lease financing 413 354 Right of use asset 128 115 Goodwill and intangibles 106 92 Employee benefits and deferred compensation 54 90 Fixed assets 54 42 Mortgage servicing rights 45 61 Other 46 35 Total deferred tax liabilities 1,290 789 Net deferred tax liability $ (505) $ (328) _______ (1) Regions adopted CECL on January 1, 2020 and the impact resulted in an increase of $126 million in deferred tax assets. Prior to adoption, the deferred tax assets impact is for the allowance for loan losses. The following table provides details of the Company’s tax carryforwards at December 31, 2020, including the expiration dates, any related valuation allowance and the amount of pre-tax earnings necessary to fully realize each net deferred tax asset balance: Expiration Dates Deferred Tax Asset Balance (2) Valuation Net Deferred Tax Pre-Tax Earnings Necessary to Realize (1) (In millions) Net operating losses-federal 2037 $ 18 $ — $ 18 $ 87 Net operating losses-federal None 7 — 7 N/A Net operating losses-states 2021-2025 14 14 — — Net operating losses-states 2026-2032 13 12 1 8 Net operating losses-states 2033-2040 4 3 1 23 Net operating losses-states None 2 2 — N/A 58 31 27 ________ (1) N/A indicates that net operating losses with no expiration are not measured on a pre-tax basis. (2) Federal and state deferred tax assets of $25 million and $2 million, respectively, related to net operating losses were acquired as part of the Company’s April 2020 equipment finance acquisition. While the federal net operating losses are subject to certain annual utilization limits, the Company has determined that a valuation allowance is not necessary based on projected annual limitation and the length of the net operating loss carryover period. The Company’s determination of the realization of the net deferred tax asset is based on its assessment of all available positive and negative evidence. At December 31, 2020, positive evidence supporting the realization of the deferred tax assets includes a history of positive earnings with no history of significant tax carryforwards expiring unused. In addition, the reversal of taxable temporary differences, excluding goodwill and the inclusion of the accretion of taxable temporary differences related to leveraged leases acquired in a previous business combination, will offset approximately $1.2 billion of the gross deferred tax assets, which is significantly larger than the $785 million deferred tax asset balance net of valuation allowance at December 31, 2020. The Company believes that a portion of the state net operating loss carryforwards will not be realized due to the length of certain state carryforward periods. Accordingly, a valuation allowance has been established in the amount of $31 million against such benefits at December 31, 2020 compared to $32 million at December 31, 2019. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: 2020 2019 2018 (In millions) Balance at beginning of year $ 37 $ 13 $ 27 Additions based on tax positions taken in a prior period 2 25 — Additions based on tax positions taken in the current period — — 11 Reductions based on tax positions taken in a prior period (25) — (13) Settlements (1) — (11) Expiration of statute of limitations (1) (1) (1) Balance at end of year $ 12 $ 37 $ 13 The Company files U.S. federal, state, and local income tax returns. The Company is in the IRS’s Compliance Assurance Process program. Pursuant to this program, examinations for tax years through 2018 have been completed. Also, with few exceptions, the Company is no longer subject to state and local income tax examinations for tax years before 2016. The completion of tax examinations was the primary reason for the reduction in unrecognized tax benefits in 2020. Currently, there are no material disputed tax positions with federal or state taxing authorities. Accordingly, the Company does not anticipate that any adjustments relating to federal or state tax examinations will result in material changes to its business, financial position, results of operations or cash flows. As a result of the potential resolution of certain federal and state income tax positions, it is reasonably possible that the UTBs could decrease as much as $4 million during the next twelve months, since resolved items will be removed from the balance whether their resolution results in payment or recognition in earnings. As of December 31, 2020, 2019 and 2018, the balances of the Company’s UTBs that would reduce the effective tax rates, if recognized, were $9 million, $34 million and $10 million, respectively. The remainder of the UTB balance has indirect tax benefits in other jurisdictions or is the tax effect of temporary differences. Income tax expense for 2020, 2019 and 2018, includes an immaterial expense (benefit) for interest expense, interest income and penalties before the impact of any applicable federal and state deductions. As of December 31, 2020 and 2019, the Company had an immaterial liability for interest and penalties related to income taxes, before the impact of any applicable federal and state deductions.

Derivative Financial Instrument

Derivative Financial Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging Activities	NOTE 21. DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES The following tables present the notional amount and estimated fair value of derivative instruments on a gross basis as of December 31: 2020 2019 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 $ 2,100 $ 77 $ — $ 2,900 $ 67 $ — Derivatives in cash flow hedging relationships: Interest rate swaps 16,000 1,181 — 17,250 338 83 Interest rate floors (2) 5,750 430 — 6,750 208 — Total derivatives in cash flow hedging relationships 21,750 1,611 — 24,000 546 83 Total derivatives designated as hedging instruments $ 23,850 $ 1,688 — $ 26,900 $ 613 $ 83 Derivatives not designated as hedging instruments: Interest rate swaps $ 76,764 $ 1,492 $ 1,464 $ 68,075 $ 659 $ 656 Interest rate options 13,806 90 28 11,347 27 9 Interest rate futures and forward commitments 4,270 11 26 27,324 10 11 Other contracts 9,924 68 80 10,276 48 58 Total derivatives not designated as hedging instruments $ 104,764 $ 1,661 $ 1,598 $ 117,022 $ 744 $ 734 Total derivatives $ 128,614 $ 3,349 $ 1,598 $ 143,922 $ 1,357 $ 817 Total gross derivative instruments, before netting $ 3,349 $ 1,598 $ 1,357 $ 817 Less: Netting adjustments (3) 2,428 1,545 1,022 770 Total gross derivative instruments, after netting (4) $ 921 $ 53 $ 335 $ 47 _________ (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) Estimated fair value includes premium of approximately $83 million as of December 31, 2020 and $108 million as of December 31, 2019 to be amortized over the remaining life. Approximately $15 million of the decrease since December 31, 2019 related to hedges that were terminated during the third quarter of 2020 and were not amortized into earnings as of the date of termination. (3) 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. (4) 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 December 31, 2020 and December 31, 2019, 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. Additional information regarding accounting policies for derivatives is described in Note 1. 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 December 31, 2020, Regions is hedging its exposure to the variability in future cash flows for forecasted transactions through 2026 and a small portion of these hedges are forward starting. 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 2026. Twelve Months Ended December 31 2020 2019 (In millions) Unrealized gains on terminated hedges included in AOCI- January 1 $ 78 $ 68 Unrealized gains on terminated hedges arising during the period 55 23 Reclassification adjustments for amortization of unrealized (gains) into net income (12) (13) Unrealized gains on terminated hedges included in AOCI-December 31 $ 121 $ 78 Regions expects to reclassify into earnings approximately $415 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 $26 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 affected for the years ended December 31: 2020 Interest Income Interest Expense Debt securities Loans, including fees Long-term borrowings (In millions) Total amounts presented in the consolidated statements of income $ 582 $ 3,610 $ 178 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ — $ — $ 37 Recognized on derivatives — — 52 Recognized on hedged items — — (51) Net income recognized on fair value hedges $ — $ — $ 38 Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ — $ 260 $ — Income (expense) recognized on cash flow hedges (2) $ — $ 260 $ — 2019 Interest Income Interest Expense Debt securities Loans, including fees Long-term borrowings (In millions) Total amounts presented in the consolidated statements of income $ 643 $ 3,866 $ 351 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ — $ — $ (14) Recognized on derivatives (2) — 92 Recognized on hedged items 2 — (92) Net income recognized on fair value hedges $ — $ — $ (14) Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ — $ (24) $ — Income (expense) recognized on cash flow hedges (2) $ — $ (24) $ — 2018 Interest Income Interest Expense Debt securities Loans, including fees Long-term borrowings (In millions) Total amounts presented in the consolidated statements of income $ 625 $ 3,613 $ 322 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ (1) $ — $ (15) Recognized on derivatives 4 — 1 Recognized on hedged items (4) — (1) Net income recognized on fair value hedges $ (1) $ — $ (15) Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ — $ 12 $ — Income (expense) recognized on cash flow hedges (2) $ — $ 12 $ — ____ (1) See Note 15 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 as of December 31: 2020 2019 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) (In millions) Long-term borrowings (2,171) (64) (2,954) (49) During 2020 and 2019, the Company had terminated fair value hedges related to debt securities available for sale with carrying values of $301 million and $337 million, respectively. The remaining basis adjustments related to these terminated hedges were $1 million and $3 million, respectively. 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 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 December 31, 2020 and 2019, Regions had $924 million and $366 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 December 31, 2020 and 2019, Regions had $1.9 billion and $662 million, 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 market value with any changes to fair value being 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 December 31, 2020 and 2019, the total notional amount related to these contracts was $4.1 billion and $4.8 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 years ended December 31: Derivatives Not Designated as Hedging Instruments 2020 2019 2018 (In millions) Capital markets income: Interest rate swaps $ 21 $ 13 $ 19 Interest rate options 36 23 28 Interest rate futures and forward commitments 14 10 3 Other contracts 1 (1) 5 Total capital markets income 72 45 55 Mortgage income: Interest rate swaps 83 68 (12) Interest rate options 30 (1) — Interest rate futures and forward commitments (2) 5 (8) Total mortgage income 111 72 (20) $ 183 $ 117 $ 35 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 2020 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 December 31, 2020 was approximately $552 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 December 31, 2020 and 2019 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 December 31, 2020 and 2019, were $74 million and $64 million, respectively, for which Regions had posted collateral of $74 million and $67 million, respectively, in the normal course of business.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	See Note 1 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 as of December 31: 2020 2019 Level 1 Level 2 Level 3 (1) Total Level 1 Level 2 Level 3 (1) Total (In millions) Recurring fair value measurements Debt securities available for sale: U.S. Treasury securities $ 183 $ — $ — $ 183 $ 182 $ — $ — $ 182 Federal agency securities — 105 — 105 — 43 — 43 Mortgage-backed securities (MBS): Residential agency — 19,076 — 19,076 — 15,516 — 15,516 Residential non-agency — — 1 1 — — 1 1 Commercial agency — 5,999 — 5,999 — 4,766 — 4,766 Commercial non-agency — 586 — 586 — 647 — 647 Corporate and other debt securities — 1,200 4 1,204 — 1,450 1 1,451 Total debt securities available for sale $ 183 $ 26,966 $ 5 $ 27,154 $ 182 $ 22,422 $ 2 $ 22,606 Loans held for sale $ — $ 1,446 $ — $ 1,446 $ — $ 436 $ 3 $ 439 Marketable equity securities $ 388 $ — $ — $ 388 $ 450 $ — $ — $ 450 Residential mortgage servicing rights $ — $ — $ 296 $ 296 $ — $ — $ 345 $ 345 Derivative assets (2) : Interest rate swaps $ — $ 2,750 $ — $ 2,750 $ — $ 1,064 $ — $ 1,064 Interest rate options — 477 43 520 — 227 8 235 Interest rate futures and forward commitments — 11 — 11 — 4 6 10 Other contracts 2 65 1 68 — 47 1 48 Total derivative assets $ 2 $ 3,303 $ 44 $ 3,349 $ — $ 1,342 $ 15 $ 1,357 Equity investments $ — $ 74 $ — $ 74 $ — $ — $ — $ — Derivative liabilities (2) : Interest rate swaps $ — $ 1,464 $ — $ 1,464 $ — $ 739 $ — $ 739 Interest rate options — 28 — 28 — 9 — 9 Interest rate futures and forward commitments — 26 — 26 — 11 — 11 Other contracts 2 72 6 80 — 53 5 58 Total derivative liabilities $ 2 $ 1,590 $ 6 $ 1,598 $ — $ 812 $ 5 $ 817 Non-recurring fair value measurements Loans held for sale $ — $ — $ 4 $ 4 $ — $ — $ 14 $ 14 Equity investments without a readily determinable fair value — — 12 12 — — 32 32 Foreclosed property and other real estate — — 5 5 — — 42 42 _________ (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 years ended December 31, 2020, 2019 and 2018, respectively. Residential mortgage servicing rights For the Years Ended December 31 2020 2019 2018 (In millions) Carrying value, beginning of period $ 345 $ 418 $ 336 Total realized/unrealized gains (losses) included in earnings (1) (157) (115) (29) Purchases 108 42 111 Carrying value, end of period $ 296 $ 345 $ 418 _______ (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 for the years ended December 31: 2020 2019 (In millions) Loans held for sale $ (8) $ (12) Equity investments without a readily determinable fair value 2 1 Foreclosed property and other real estate (10) (30) The following tables present detailed information regarding material assets and liabilities measured at fair value using significant unobservable inputs (Level 3) as of December 31, 2020, 2019 and 2018. 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 December 31, 2020, 2019 and 2018 are included. Following the tables are descriptions of the valuation techniques and the sensitivity of the techniques to changes in the significant unobservable inputs. December 31, 2020 Level 3 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%) December 31, 2019 Level 3 Valuation Unobservable Quantitative Range of (Dollars in millions) Recurring fair value measurements: Residential mortgage servicing rights (1) $345 Discounted cash flow Weighted-average CPR (%) 7.4% - 26.1% (12.0%) OAS (%) 5.2% - 10.2% (6.2%) December 31, 2018 Level 3 Valuation Unobservable Quantitative Range of (Dollars in millions) Recurring fair value measurements: Residential mortgage servicing rights (1) $418 Discounted cash flow Weighted-average CPR (%) 4.4% -42.6% (9.0%) OAS (%) 5.7% - 15.0% (7.6%) _________ (1) See Note 7 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 7. FAIR VALUE OPTION Regions has elected the fair value option for all eligible agency residential mortgage loans and certain commercial 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 December 31, 2020. 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 at December 31: 2020 2019 Aggregate Aggregate Aggregate Fair Aggregate Aggregate Aggregate Fair (In millions) Mortgage loans held for sale, at fair value $ 1,439 $ 1,362 $ 77 $ 439 $ 425 $ 14 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 for the years presented. 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. 2020 2019 (In millions) Net gains (losses) resulting from changes in fair value of mortgage loans held for sale $ 63 $ 4 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: 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. 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, 2019 are as follows: 2019 Carrying Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 4,114 $ 4,114 $ 4,114 $ — $ — Debt securities held to maturity 1,332 1,372 — 1,372 — Debt securities available for sale 22,606 22,606 182 22,422 2 Loans held for sale 637 637 — 620 17 Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 80,841 80,799 — — 80,799 Other earning assets (4) 1,221 1,221 450 771 — Derivative assets 1,357 1,357 — 1,342 15 Financial liabilities: Derivative liabilities 817 817 — 812 5 Deposits 97,475 97,516 — 97,516 — Short-term borrowings 2,050 2,050 — 2,050 — Long-term borrowings 7,879 8,275 — 7,442 833 Loan commitments and letters of credit 67 67 — — 67 _________ (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 discount on the loan portfolio's net carrying amount at December 31, 2019 was $42 million or 0.1 percent. (3) Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.3 billion at December 31, 2019. (4) Excluded from this table is the operating lease carrying amount of $297 million at December 31, 2019.

Business Segment Information

Business Segment Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
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 split between Discontinued Operations and Other. 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. The Corporate Bank segment represents the Company’s commercial banking functions including commercial and industrial, commercial real estate and investor real estate lending. This segment also includes equipment lease financing, as well as capital markets activities, which include securities underwriting and placement, loan syndication and placement, foreign exchange, derivatives, merger and acquisition and other advisory services. Corporate Bank customers include corporate, middle market, and commercial real estate developers and investors. Corresponding deposit products related to these types of customers are also included in this segment. The Consumer Bank segment represents the Company’s branch network, including consumer banking products and services related to residential first mortgages, home equity lines and loans, branch small business loans, indirect loans, consumer credit cards and other consumer loans, as well as the corresponding deposit relationships. These services are also provided through the Company's digital channels and contact center. The Wealth Management segment offers individuals, businesses, governmental institutions and non-profit entities a wide range of solutions to help protect, grow and transfer wealth. Offerings include credit related products, trust and investment management, asset management, retirement and savings solutions and estate planning. Discontinued operations includes all brokerage and investment activities associated with the sale of Morgan Keegan which closed on April 2, 2012, as well as the sale of Regions Insurance Group, Inc. and related affiliates, which closed on July 2, 2018. See Note 3 "Discontinued Operations" for related discussion. Other includes the Company’s Treasury function, the securities portfolio, wholesale funding activities, interest rate risk management activities and other corporate functions that are not related to a strategic business unit. Also within Other are certain reconciling items in order to translate the segment results that are based on management accounting practices into consolidated results. Management accounting practices utilized by Regions as the basis of presentation for segment results include the following: • Net interest income is presented based upon an FTP approach, for which market-based funding charges/credits are assigned within the segments. By allocating a cost or a credit to each product based on the FTP framework, management is able to more effectively measure the net interest margin contribution of its assets/liabilities by segment. The summation of the interest income/expense and FTP charges/credits for each segment is its designated net interest income and other financing income. The variance between the Company’s cumulative FTP charges and cumulative FTP credits is offset in Other. • Provision for credit losses is allocated to each segment based on an estimated loss methodology. The difference between the consolidated provision for credit losses and the segments’ estimated loss is reflected in Other. • Income tax expense (benefit) is calculated for the Corporate Bank, Consumer Bank and Wealth Management based on a consistent federal and state statutory rate. Discontinued Operations reflects the actual income tax expense (benefit) of its results. Any difference between the Company’s consolidated income tax expense (benefit) and the segments’ calculated amounts is reflected in Other. • Management reporting allocations of certain expenses are made in order to analyze the financial performance of the segments. These allocations consist of operational and overhead cost pools and are intended to represent the total costs to support a segment. The following tables present financial information for each reportable segment for the year ended December 31: 2020 Corporate Bank Consumer Wealth Other Continuing Discontinued Consolidated (In millions) Net interest income (loss) $ 1,783 $ 2,274 $ 156 $ (319) $ 3,894 $ — $ 3,894 Provision (credit) for credit losses (1) 299 320 14 697 1,330 — 1,330 Non-interest income 656 1,266 343 128 2,393 — 2,393 Non-interest expense 1,026 2,046 346 225 3,643 — 3,643 Income (loss) before income taxes 1,114 1,174 139 (1,113) 1,314 — 1,314 Income tax expense (benefit) 279 294 34 (387) 220 — 220 Net income (loss) $ 835 $ 880 $ 105 $ (726) $ 1,094 $ — $ 1,094 Average assets $ 61,237 $ 34,516 $ 2,021 $ 40,321 $ 138,095 $ — $ 138,095 2019 Corporate Bank Consumer Wealth Other Continuing Discontinued Consolidated (In millions) Net interest income (loss) $ 1,446 $ 2,336 $ 180 $ (217) $ 3,745 $ — $ 3,745 Provision (credit) for credit losses (1) 205 340 16 (174) 387 — 387 Non-interest income 538 1,214 330 34 2,116 — 2,116 Non-interest expense 934 2,107 343 105 3,489 — 3,489 Income (loss) before income taxes 845 1,103 151 (114) 1,985 — 1,985 Income tax expense (benefit) 211 276 37 (121) 403 — 403 Net income (loss) $ 634 $ 827 $ 114 $ 7 $ 1,582 $ — $ 1,582 Average assets $ 53,867 $ 35,045 $ 2,183 $ 34,015 $ 125,110 $ — $ 125,110 2018 Corporate Bank Consumer Wealth Other Continuing Discontinued Consolidated (In millions) Net interest income (loss) $ 1,384 $ 2,216 $ 194 $ (59) $ 3,735 $ 1 $ 3,736 Provision (credit) for credit losses (1) 191 317 16 (295) 229 — 229 Non-interest income 545 1,146 316 12 2,019 349 2,368 Non-interest expense 909 2,066 334 261 3,570 79 3,649 Income (loss) before income taxes 829 979 160 (13) 1,955 271 2,226 Income tax expense (benefit) 207 245 40 (105) 387 80 467 Net income (loss) $ 622 $ 734 $ 120 $ 92 $ 1,568 $ 191 $ 1,759 Average assets $ 51,530 $ 35,066 $ 2,287 $ 34,415 $ 123,298 $ 82 $ 123,380 _____

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitment, Contingencies and Guarantees	NOTE 24. 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 associated with these instruments as of December 31 is represented by the contractual amounts indicated in the following table: 2020 2019 (In millions) Unused commitments to extend credit $ 56,644 $ 52,976 Standby letters of credit 1,742 1,521 Commercial letters of credit 132 59 Liabilities associated with standby letters of credit 25 22 Assets associated with standby letters of credit 25 23 Reserve for unfunded credit commitments 126 45 Unused commitments to extend credit —To accommodate the financial needs of its customers, Regions makes commitments under various terms to lend funds to consumers, businesses and other entities. These commitments include (among others) credit card and other revolving credit agreements, term loan commitments and short-term borrowing agreements. Many of these loan commitments have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of these commitments are expected to expire without being funded, the total commitment amounts do not necessarily represent future liquidity requirements. Standby letters of credit —Standby letters of credit are also issued to customers which commit Regions to make payments on behalf of customers if certain specified future events occur. Regions has recourse against the customer for any amount required to be paid to a third party under a standby letter of credit. The credit risk involved in the issuance of these guarantees is essentially the same as that involved in extending loans to clients and as such, the instruments are collateralized when necessary. Historically, a large percentage of standby letters of credit expire without being funded. The contractual amount of standby letters of credit represents the maximum potential amount of future payments Regions could be required to make and represents Regions’ maximum credit risk. Commercial letters of credit —Commercial letters of credit are issued to facilitate foreign or domestic trade transactions for customers. As a general rule, drafts will be drawn when the goods underlying the transaction are in transit. 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 December 31, 2020, 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. The reasonably possible estimate includes a legal contingency that is subject to an indemnification agreement. 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 INDEMNIFICATION OBLIGATION As discussed in Note 3, on April 2, 2012 (“Closing Date”), Regions closed the sale of Morgan Keegan and related affiliates to Raymond James. In connection with the sale, Regions agreed to indemnify Raymond James for all legal matters related to pre-closing activities, including matters filed subsequent to the Closing Date that relate to actions that occurred prior to closing. Losses under the indemnification include legal and other expenses, such as costs for judgments, settlements and awards associated with the defense and resolution of the indemnified matters. The maximum potential amount of future payments that Regions could be required to make under the indemnification is indeterminable due to the indefinite term of some of the obligations. As of December 31, 2020, the carrying value and fair value of the indemnification obligation were immaterial. 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 of the principal balance for the majority of its DUS servicing portfolio. At December 31, 2020 and 2019, the Company's DUS servicing portfolio totaled approximately $4.5 billion and $3.9 billion, respectively. Regions' maximum quantifiable contingent liability related to its loss share guarantee was approximately $1.5 billion and $1.3 billion at December 31, 2020 and 2019, respectively. 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 and $4 million at December 31, 2020 and 2019, respectively. Refer to Note 1 for additional information. VISA INDEMNIFICATION As a member of the Visa USA network, Regions, along with other members, indemnified Visa USA against litigation. On October 3, 2007, Visa USA was restructured and acquired several Visa affiliates. In conjunction with this restructuring, Regions' indemnification of Visa USA was modified to cover specific litigation (“covered litigation”). A portion of Visa's proceeds from its IPO was put into escrow to fund the covered litigation. To the extent that the amount available under the escrow arrangement, or subsequent fundings of the escrow account resulting from reductions in the class B share conversion ratio, is insufficient to fully resolve the covered litigation, Visa will enforce the indemnification obligations of Visa USA's members for any excess amount. At this time, Regions has concluded that it is not probable that covered litigation exposure will exceed the class B share value.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2020
Revenue Recognition [Abstract]
Revenue Recognition	The Company records revenue when control of the promised products or services is transferred to the customer, in an amount that reflects the consideration Regions expects to be entitled to receive in exchange for those products or services. Refer to Note 1 for descriptions of the accounting and reporting policies related to revenue recognition. The following tables present total non-interest income disaggregated by major product category for each reportable segment for the period indicated: Year Ended December 31, 2020 Corporate Bank Consumer Wealth Other Segment Revenue Other (2) Continuing Discontinued (In millions) Service charges on deposit accounts $ 152 $ 459 $ 3 $ 2 $ 5 $ 621 $ — Card and ATM fees 43 385 — (1) 11 438 — Investment management and trust fee income — — 253 — — 253 — Capital markets income 126 — — — 149 275 — Mortgage income — — — — 333 333 — Investment services fee income — — 84 — — 84 — Commercial credit fee income — — — — 77 77 — Bank-owned life insurance — — — — 95 95 — Securities gains (losses), net — — — — 4 4 — Market value adjustments on employee benefit assets - other — — — — 12 12 — Valuation gain on equity investment (1) — — — — 50 50 — Other miscellaneous income 33 49 3 2 64 151 — $ 354 $ 893 $ 343 $ 3 $ 800 $ 2,393 $ — Year Ended December 31, 2019 Corporate Bank Consumer Wealth Other Segment Revenue Other (2) Continuing Discontinued (In millions) Service charges on deposit accounts $ 154 $ 565 $ 3 $ — $ 7 $ 729 $ — Card and ATM fees 54 422 1 — (22) 455 — Investment management and trust fee income — — 243 — — 243 — Capital markets income 69 — — — 109 178 — Mortgage income — — — — 163 163 — Investment services fee income — — 79 — — 79 — Commercial credit fee income — — — — 73 73 — Bank-owned life insurance — — — — 78 78 — Securities gains (losses), net — — — — (28) (28) — Market value adjustments on employee benefit assets - defined benefit — — — — 5 5 — Market value adjustments on employee benefit assets - other — — — — 11 11 — Other miscellaneous income 18 58 5 (2) 51 130 — $ 295 $ 1,045 $ 331 $ (2) $ 447 $ 2,116 $ — Year Ended December 31, 2018 Corporate Bank Consumer Wealth Other Segment Revenue Other (2) Continuing Discontinued (In millions) Service charges on deposit accounts $ 145 $ 554 $ 3 $ — $ 8 $ 710 $ — Card and ATM fees 52 404 1 (1) (18) 438 — Investment management and trust fee income — — 235 — — 235 — Capital markets income 76 — — — 126 202 — Mortgage income — — — — 137 137 — Investment services fee income — — 71 — — 71 — Commercial credit fee income — — — — 71 71 — Bank-owned life insurance — — — — 65 65 — Securities gains (losses), net — — — — 1 1 (1) Market value adjustments on employee benefit assets - defined benefit — — — — (6) (6) — Market value adjustments on employee benefit assets - other — — — — (5) (5) — Insurance commissions and fees — — 1 3 — 4 69 Gain on sale of business (2) — — — — — — 281 Other miscellaneous income 13 42 3 (1) 39 96 — $ 286 $ 1,000 $ 314 $ 1 $ 418 $ 2,019 $ 349 _________ (1) In the third quarter of 2020, the equity investee executed an initial public offering. The Company was subject to a conventional post-issuance 180 day lock-up period, which prevented the sale of its position until January 2021. The Company sold its position in January 2021 and recognized an immaterial gain. (2) This revenue is not impacted by the accounting guidance adopted in 2018 and continues to be recognized when earned in accordance with the Company's prior revenue recognition policy. Regions elected the practical expedient related to contract costs and will continue to expense sales commissions and any related contract costs when incurred because the amortization period would have been one year or less.

Parent Company Only Financial S

Parent Company Only Financial Statements	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Parent Company Only Financial Statements	Presented below are condensed financial statements of Regions Financial Corporation: Balance Sheets December 31 2020 2019 (In millions) Assets Interest-bearing deposits in other banks $ 1,526 $ 1,935 Loans to subsidiaries 20 20 Debt securities available for sale 22 21 Premises and equipment, net 38 41 Investments in subsidiaries: Banks 18,872 16,939 Non-banks 250 207 19,122 17,146 Other assets 313 295 Total assets $ 21,041 $ 19,458 Liabilities and Shareholders’ Equity Long-term borrowings $ 2,718 $ 2,950 Other liabilities 212 213 Total liabilities 2,930 3,163 Shareholders’ equity: Preferred stock 1,656 1,310 Common stock 10 10 Additional paid-in capital 12,731 12,685 Retained earnings 3,770 3,751 Treasury stock, at cost (1,371) (1,371) Accumulated other comprehensive income (loss), net 1,315 (90) Total shareholders’ equity 18,111 16,295 Total liabilities and shareholders’ equity $ 21,041 $ 19,458 Statements of Income Year Ended December 31 2020 2019 2018 (In millions) Income: Dividends received from subsidiaries $ 280 $ 1,675 $ 2,190 Interest from subsidiaries 8 4 3 Other 53 7 7 341 1,686 2,200 Expenses: Salaries and employee benefits 56 54 52 Interest 93 153 123 Furniture and equipment expense 4 5 4 Other 79 84 76 232 296 255 Income before income taxes and equity in undistributed earnings of subsidiaries 109 1,390 1,945 Income tax benefit (36) (68) (64) Income from continuing operations 145 1,458 2,009 Discontinued operations: Income (loss) from discontinued operations before income taxes — — 271 Income tax expense — — 80 Income (loss) from discontinued operations, net of tax — — 191 Income before equity in undistributed earnings of subsidiaries and preferred dividends 145 1,458 2,200 Equity in undistributed earnings of subsidiaries: Banks 905 110 (454) Non-banks 44 14 13 949 124 (441) Net income 1,094 1,582 1,759 Preferred stock dividends (103) (79) (64) Net income available to common shareholders $ 991 $ 1,503 $ 1,695 Statements of Cash Flows Year Ended December 31 2020 2019 2018 (In millions) Operating activities: Net income $ 1,094 $ 1,582 $ 1,759 Adjustments to reconcile net cash from operating activities: Equity in undistributed earnings of subsidiaries (949) (124) 441 Provision for deferred income taxes 29 20 8 Depreciation, amortization and accretion, net 3 4 3 Loss on sale of assets 1 — — Loss on early extinguishment of debt 14 16 — (Gain) on sale of business — — (281) Net change in operating assets and liabilities: Other assets 3 18 (35) Other liabilities — (7) (8) Other 44 102 23 Net cash from operating activities 239 1,611 1,910 Investing activities: (Investment in) / repayment of investment in subsidiaries — (18) 146 Proceeds from sales and maturities of debt securities available for sale 4 5 8 Purchases of debt securities available for sale (4) (6) (10) Proceeds from disposition of business, net of cash transferred — — 357 Net cash from investing activities — (19) 501 Financing activities: Net change in short-term borrowings — — (101) Proceeds from long-term borrowings 748 500 500 Payments on long-term borrowings (1,039) (751) — Cash dividends on common stock (595) (577) (452) Cash dividends on preferred stock (103) (79) (64) Net proceeds from issuance of preferred stock 346 490 — Repurchase of common stock — (1,101) (2,122) Other (5) (2) (2) Net cash from financing activities (648) (1,520) (2,241) Net change in cash and cash equivalents (409) 72 170 Cash and cash equivalents at beginning of year 1,935 1,863 1,693 Cash and cash equivalents at end of year $ 1,526 $ 1,935 $ 1,863

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Credit Loss, Financial Instrument [Policy Text Block]	CECL On January 1, 2020, the Company adopted CECL ,
Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block]	BASIS OF PRESENTATION AND PRINCIPLES OF CONSOLIDATION The consolidated financial statements include the accounts of Regions, its subsidiaries and certain VIEs. Significant intercompany balances and transactions have been eliminated. Regions considers a voting rights entity to be a subsidiary and consolidates it if Regions has a controlling financial interest in the entity. VIEs are consolidated if Regions has the power to direct the activities of the VIE that significantly impact financial performance and has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE (i.e., Regions is the primary beneficiary). The determination of whether Regions is the primary beneficiary of a VIE is reassessed on an ongoing basis. Investments in companies which are not VIEs but in which Regions has significant influence over the operating and financing decisions, are accounted for using the equity method of accounting. Investments in VIEs, where Regions is not the primary beneficiary of a VIE, are accounted for using either the proportional amortization method or the equity method of accounting. These investments are included in other assets in the consolidated balance sheets. The maximum potential exposure to losses relative to investments in VIEs is generally limited to the sum of the outstanding balance, future funding commitments and any related loans to the entity. Loans to these entities are underwritten in substantially the same manner as are other loans and are generally secured. Refer to Note 2 for additional disclosures regarding Regions’ significant VIEs. Unconsolidated equity investments that do not meet the criteria to be accounted for under the equity method and do not have a readily determinable fair value are accounted for at cost under the measurement alternative with adjustments for impairment and observable price changes as applicable. Cost method investments are included in other assets in the consolidated balance sheets. Dividends received or receivable and observable price changes from these investments are included as a component of other non-interest income in the consolidated statements of income.
Discontinued Operations, Policy [Policy Text Block]	DISCONTINUED OPERATIONS On April 4, 2018, Regions entered into a stock purchase agreement to sell Regions Insurance Group, Inc. and related affiliates to BB&T Insurance Holdings, Inc. (now Truist Insurance Holdings, Inc). The transaction closed on July 2, 2018. Results of operations for the entities sold are presented separately as discontinued operations for all periods presented on the consolidated statements of income. Other expenses related to the transaction are also included in discontinued operations. See Note 3 and Note 24 for further discussion.
Cash and Cash Equivalents, Policy [Policy Text Block]	CASH EQUIVALENTS AND CASH FLOWS Cash equivalents represent assets that can be converted into cash immediately. At Regions, these assets include cash and due from banks, interest-bearing deposits in other banks, and federal funds sold and securities purchased under agreements to resell. Cash flows from loans, either originated or acquired, are classified at that time according to management’s intent to either sell or hold the loan for the foreseeable future. When management’s intent is to sell the loan, the cash flows of that loan are presented as operating cash flows. When management’s intent is to hold the loan for the foreseeable future, the cash flows of that loan are presented as investing cash flows.
Repurchase Agreements, Collateral, Policy [Policy Text Block]	SECURITIES PURCHASED UNDER AGREEMENTS TO RESELL AND SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Securities purchased under agreements to resell and securities sold under agreements to repurchase are treated as collateralized financing transactions. It is Regions’ policy to take possession of securities purchased under resell agreements either through direct delivery or a tri-party agreement.
Investment, Policy [Policy Text Block]	DEBT SECURITIES Management determines the appropriate accounting classification of debt securities at the time of purchase, based on intent, and periodically re-evaluates such designations. Debt securities are classified as held to maturity when the Company has the intent and ability to hold the securities to maturity. Debt securities held to maturity are presented at amortized cost. Debt securities not classified as held to maturity are classified as available for sale. Debt securities available for sale are presented at estimated fair value with changes in unrealized gains and losses, net of taxes, reported as a component of accumulated other comprehensive income (loss). See the “Fair Value Measurements” section below for discussion of determining fair value. The amortized cost of debt securities classified as held to maturity and available for sale is adjusted for amortization of premiums and accretion of discounts to maturity, or in the case of mortgage-backed securities, over the estimated life of the security, using the interest method. Such amortization or accretion is included in interest income on securities. Realized gains and losses are included in net securities gains (losses). The cost of securities sold is based on the specific identification method. For debt securities available for sale, the Company reviews its securities portfolio for impairment and determines if impairment is related to credit loss or non-credit loss. In making the assessment of whether a loss is from credit or other factors, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows is less than the amortized cost basis, a credit loss exists and an allowance is created, limited by the amount that the fair value is less than the amortized cost basis. Subsequent activity related to the credit loss component (e.g. write-offs, recoveries) is recognized as part of the allowance for credit losses on debt securities available for sale. Securities held to maturity are evaluated under the allowance for credit losses model. For securities which have an expectation of zero nonpayment of the amortized cost basis (e.g. U.S. Treasury securities or agency securities), the expected credit loss is zero. Refer to Note 4 for further detail and information on securities.
Finance, Loan and Lease Receivables, Held-for-sale, Policy [Policy Text Block]	LOANS HELD FOR SALE Regions’ loans held for sale include commercial loans, investor real estate loans and residential real estate mortgage loans. Loans held for sale are recorded at either estimated fair value, if the fair value option is elected, or the lower of cost or estimated fair value. Regions has elected to account for residential real estate mortgages originated with the intent to sell at fair value. Intent is established for these conforming residential real estate mortgage loans when Regions enters into an interest rate lock commitment. Gains and losses on these residential mortgage loans held for sale for which the fair value option has been elected are included in mortgage income. Certain commercial loans held for sale where management has elected the fair value option are recorded at fair value. Gains and losses on commercial loans held for sale for which the fair value option has been elected are included in capital markets income. Regions also transfers certain commercial, investor real estate, and residential real estate mortgage portfolio loans to held for sale when management has the intent to sell in the near term. These held for sale loans are recorded at the lower of cost or estimated fair value. At the time of transfer, write-downs on the loans are recorded as charge-offs when credit related and non-interest expense when not credit related and a new cost basis is established. Any subsequent lower of cost or market adjustment is determined on an individual loan basis. Gains and losses on the sale of non-performing commercial and investor real estate loans are included in other non-interest expense. See the “Fair Value Measurements” section below for discussion of determining estimated fair value.
Receivables, Policy [Policy Text Block]	LOANS Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are considered loans held for investment (or portfolio loans). Loans held for investment are carried at amortized cost (the principal amount outstanding, net of premiums, discounts, unearned income and deferred loan fees and costs). Regions elected to exclude accrued interest receivable balances from the amortized cost basis. Interest receivable is included as a separate line item on the balance sheet. Regions' loans balance is comprised of commercial, investor real estate and consumer loans. Interest income on all types of loans is accrued based on the contractual interest rate and the principal amount outstanding using methods that approximate the interest method, except for those loans classified as non-accrual. Premiums and discounts on purchased loans and non-refundable loan origination and commitment fees, net of direct costs of originating or acquiring loans, are deferred and recognized over the contractual or estimated lives of the related loans as an adjustment to the loans’ constant effective yield, which is included in interest income on loans. Direct financing, sales-type and leveraged leases are included within the commercial portfolio segment. See Note 5 for further detail and information on loans and Note 14 for further detail on leases. Regions determines past due or delinquency status of a loan based on contractual payment terms. Commercial and investor real estate loans are placed on non-accrual if any of the following conditions occur: 1) collection in full of contractual principal and interest is no longer reasonably assured (even if current as to payment status), 2) a partial charge-off has occurred, unless the loan has been brought current under its contractual terms (original or restructured terms) and the full originally contracted principal and interest is considered to be fully collectible, or 3) the loan is delinquent on any principal or interest for 90 days or more unless the obligation is secured by collateral having a net realizable value (estimated fair value less costs to sell) sufficient to fully discharge the obligation and the loan is in the legal process of collection. Factors considered regarding full collection include assessment of changes in borrower’s cash flow, valuation of underlying collateral, ability and willingness of guarantors to provide credit support, and other conditions. Charge-offs on commercial and investor real estate loans are primarily based on the facts and circumstances of the individual loan and occur when available information confirms the loan is not or will not be fully collectible. Factors considered in making these determinations are the borrower’s and any guarantor’s ability and willingness to pay, the status of the account in bankruptcy court (if applicable), and collateral value. Commercial and investor real estate loan relationships of $250,000 or less are subject to charge-off or charge down to estimated fair value at 180 days past due, based on collateral value. Non-accrual and charge-off decisions for consumer loans are dictated by the FFIEC's Uniform Retail Credit Classification and Account Management Policy which establishes standards for the classification and treatment of consumer loans. The charge-off process drives consumer non-accrual status as follows. If a consumer loan secured by real estate in a first lien position (residential first mortgage or home equity) becomes 180 days past due, Regions evaluates the loan for non-accrual status and potential charge-off based on net loan to value exposure. For home equity loans and lines of credit in a second lien position, the evaluation is performed at 120 days past due. If a loan is secured by collateral having a net realizable value sufficient to fully discharge the obligation, then a partial write-down is not necessary and the loan remains on accrual status, provided it is in the process of legal collection. If a partial charge-off is necessary as a result of the evaluation, then the remaining balance is placed on non-accrual. Consumer loans not secured by real estate are generally charged-off at either 120 days past due for closed-end loans, 180 days past due for open-end loans other than credit cards or the end of the month in which the loan becomes 180 days past due for credit cards. When loans are placed on non-accrual status, the accrual of interest, amortization of loan premium, accretion of loan discount and amortization/accretion of deferred net loan fees/costs are discontinued. When a commercial or investor real estate loan is placed on non-accrual status, uncollected interest accrued in the current year is reversed and charged to interest income. Uncollected interest accrued from prior years on commercial and investor real estate loans placed on non-accrual status in the current year is charged against the allowance for loan losses. When a consumer loan is placed on non-accrual status, all uncollected interest accrued is reversed and charged to interest income due to immateriality. Interest collections on commercial and investor real estate non-accrual loans are applied as principal reductions. Interest collections on consumer loans are recorded using the cash basis, due to immateriality. All loans on non-accrual status may be returned to accrual status and interest accrual resumed if all of the following conditions are met: 1) the loan is brought contractually current as to both principal and interest, 2) future payments are reasonably expected to continue being received in accordance with the terms of the loan and repayment ability can be reasonably demonstrated, and 3) the loan has been performing for at least six months. Purchased Loans Purchased loans are recorded at their fair value at the acquisition date. Purchased loans are evaluated and classified as either PCD, which indicates that the loan has experienced more than insignificant credit deterioration since origination, or non-PCD loans. For PCD loans, the sum of the loans' purchase price and allowance for credit losses, which is determined using the same methodology as originated loans, becomes their initial amortized cost basis. For non-PCD loans, the difference between the fair value and the par value is considered the fair value mark. The non-credit discount or premium related to PCD loans and the fair value mark on non-PCD loans is accreted or amortized into interest income over the contractual life of the loan using the effective interest method. Subsequent changes in the allowance to the PCD and non-PCD loans are recognized in the provision for credit losses.
Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]	TDRs TDRs are loans in which the borrower is experiencing financial difficulty at the time of restructuring, and Regions has granted a concession to the borrower. TDRs are undertaken in order to improve the likelihood of recovery on the loan and may take the form of modifications made with the stated interest rate lower than the current market rate for new debt with similar risk, other modifications to the structure of the loan that fall outside of normal underwriting policies and procedures, or in limited circumstances forgiveness of principal and/or interest. Insignificant delays in payments are not considered TDRs. TDRs can involve loans remaining on non-accrual, moving to non-accrual, or continuing on accrual status, depending on the individual facts and circumstances of the borrower. TDRs are subject to policies governing accrual/non-accrual evaluation consistent with all other loans of the same product type as discussed in the “Loans” section above. Prior to the adoption of CECL on January 1, 2020, all loans with the TDR designation were considered to be impaired, even if they were accruing. With the adoption of CECL on January 1, 2020, the definition of impaired loans was removed from accounting guidance. The CAP was designed to evaluate potential consumer loan participants as early as possible in the life cycle of the troubled loan (as described in Note 6). Many of the modifications are finalized without the borrower ever reaching the applicable number of days past due, and therefore the loan may never be placed on non-accrual. Accordingly, given the positive impact of the restructuring on the likelihood of recovery of cash flows due under the modified terms, accrual status continues to be appropriate for these loans. As provided in the CARES Act passed into law on March 27, 2020, 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 December 31, 2020 were eligible for relief from TDR classification. Regions elected this provision of the CARES Act; therefore, modified loans that met the required guidelines for relief are not considered TDRs. The CARES 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 December 31, 2020. Further, on December 27, 2020, the Consolidated Appropriations Act was signed into law and extended the relief from TDR classification through January 1, 2022. Regions elected this provision.
Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts [Policy Text Block]	ALLOWANCE Regions adopted CECL using the modified retrospective method for loans held for investment, net investment in lease assets, and off-balance sheet credit exposures. Regions elected not to estimate an allowance on interest receivable balances because the Company has non-accrual policies in place that provide for the accrual of interest to cease on a timely basis when all contractual amounts due are not expected. The cumulative effect of the retrospective application for loans and unfunded commitments was an increase in the allowance of $501 million and a reduction to retained earnings of $375 million, with the difference being an increase to deferred tax assets. The adoption of CECL on January 1, 2020 replaced the incurred loss methodology to estimate the allowance with the expected loss methodology. Refer to Note 1 "Summary of Significant Accounting Policies" of the Annual Report on Form 10-K for the year ended December 31, 2019, for additional information regarding the accounting and reporting policies related to the incurred loss methodology. Upon the adoption of CECL, the allowance is intended to cover expected credit losses over the contractual life of loans measured at amortized cost, including unfunded commitments. Management’s measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and R&S forecasts that affect the collectability of the reported amount. For periods beyond which Regions makes or obtains such R&S forecasts, Regions reverts to historical credit loss information. Regions maintains an appropriate level of allowance that falls within an acceptable range of estimated losses, measured in accordance with GAAP. Management's determination of the appropriateness of the allowance is based on many factors, including, but not limited to, an evaluation and rating of the loan portfolio; historical loan loss experience; current economic conditions; collateral values securing loans; levels of problem loans; volume, growth, quality and composition of the loan portfolio; regulatory guidance; R&S economic forecasts; and other relevant factors. Changes in any of these factors, assumptions, or the availability of new information, could require that the allowance be adjusted in future periods, perhaps materially. Loss forecasting models are built on historical loss information and then applied to the current portfolio. Outputs from the loss forecasting models in combination with Regions' qualitative framework, and other analyses are used to inform management in its estimation of Regions' expected credit losses. Actual losses could vary, perhaps materially, from management’s estimates. The entire allowance is available to cover all charge-offs that arise from the loan portfolio. Regions' allowance calculation is a significant estimate. Regions uses its best judgment to assess economic conditions and loss data in estimating the CECL allowance and these estimates are subject to periodic refinement based on changes in underlying external or internal data. Therefore, assumptions and decisions driving the estimate may change as conditions change. These assumptions and estimates are detailed below. R & S forecast period During the two-year R&S forecast period, Regions incorporates forward-looking information by utilizing its internally developed and approved Base economic forecast. The scenario is developed by the Chief Economist and approved through a formal governance process. The Base forecast considers market forward/consensus information and is consistent with the Company's organization-wide economic outlook. When appropriate, additional scenarios, including externally created scenarios, are considered as part of the determination of the allowance. Reversion period Regions utilizes an exponential reversion approach that reverts to TTC rates derived from the simple average of all historical quarterly observations for PD, LGD, EAD and prepayment rates. The length of the reversion period differs by class of financing receivable. Historical loss period Regions does not adjust historical loss information for existing economic conditions or expectations of future economic conditions for periods that are beyond the R&S period. Regions utilizes internal historical loss information; however, there are certain loan portfolios that also benefit from the use of external or other reference data due to identified limitations with internal historical data. Contractual life Regions estimates expected credit losses over the contractual life of a loan. Regions defines contractual life for non-revolving loans as contractual maturity, net of estimated prepayments and excluding expected extensions, renewals and modifications unless 1) Regions has a reasonable expectation at the reporting date that it will execute a TDR with the borrower ("RETDR") or 2) extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by Regions. RETDR Regions individually identifies commercial and investor real estate loans for inclusion as RETDRs. The identification criteria are based on internal risk ratings and time to maturity. Regions typically does not identify consumer loans as RETDRs due to the insignificant period between initial contact with a customer regarding a loan modification and when a TDR modification is consummated. The RETDR status extends the life of the loan past the contractual maturity and includes the allowance impact of interest rate concessions. Loans identified as RETDRs will be treated consistently from a modeling/reserving perspective as loans identified as TDRs. Contractual term extensions (borrower versus lender option to renew) Regions' consumer loan contracts do not permit automatic extensions or unilateral customer extensions, and Regions retains the right to approve or deny any extension requested from the borrower. As a result, extensions and renewal options are not included in the life of consumer loans for the purposes of calculating the allowance. Similarly, Regions does not include extension and renewal options in the life of commercial loans for the purposes of calculating the allowance, unless it is a RETDR. Most commercial products do not offer borrowers a unilateral right to renew or extend. Contractual life of credit card receivables Regions estimates the life of credit card receivables based on the amount and timing of payments expected to be collected. Regions' credit card allowance estimate only considers the amount of debt outstanding at the reporting date (the current position) because undrawn balances are unconditionally cancellable and therefore are not considered. Regions classifies credit card accounts into one of three payment patterns: dormant, transacting or revolving. The dormant accounts are idle, carry no balance, and do not contribute to the allowance. The transacting account holders tend to pay the entire balance due every month and are, therefore, subject to practically no interest charges. For transactor accounts, the current position balance is expected to be paid off in one quarter. The revolving accounts tend to be subject to interest charges, and their current position balance liquidates over time. Regions' credit card portfolio is comprised primarily of revolvers. Collateral-dependent loans Regions' collateral-dependent consumer loans are loans secured by collateral (primarily real estate) that meet the partial charge-down requirements disclosed within this section. Regions evaluates significant commercial and investor real estate loans that are in financial difficulty and secured by collateral to determine if they are collateral dependent. For collateral-dependent loans, CECL requires an entity to measure the expected credit losses based on the fair value of the collateral at the reporting date when the entity determines that foreclosure is probable. Additionally, CECL allows a fair value of collateral practical expedient as a measurement approach for loans when the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty ("collateral dependent”). For any collateral-dependent loans that meet Regions' specific allowance criteria (see below), Regions will calculate the CECL allowance based on the fair value of collateral methodology. For collateral-dependent consumer, commercial and investor real estate loans that do not meet Regions' specific allowance criteria (as described below), Regions considers the value of the collateral through the LGD component of the loss model based on collateral type. Credit enhancements Regions' estimate of credit losses reflects how credit enhancements, other than those that are freestanding contracts, mitigate expected credit losses on financial assets. In the event that a credit enhancement arrangement is considered to be a freestanding contract, Regions excludes the credit enhancement from the related loan when estimating expected credit losses. Unfunded commitments and other off-balance sheet items CECL requires an entity to record a liability or allowance for credit losses for the unfunded portion of a loan commitment in the event that the issuer does not have the unconditional right to cancel the commitment. For an unfunded commitment to be considered unconditionally cancellable, Regions must be able to, at any time, with or without cause, refuse to extend credit. The liability is measured over the full contractual period for which Regions is exposed to credit risk through a current obligation to extend credit. In determining the liability, management considers the likelihood that funding will occur, and if funded, the related expected credit losses under the CECL model. Regions' off-balance sheet unfunded commitments in the form of home equity lines, standby letters of credit, commercial letters of credit and commercial revolving products that are deemed to be conditionally cancellable will include unfunded balances within the allowance estimate. Future advances from certain unfunded commitments and other revolving products where Regions does have the unconditional right to cancel these agreements will not be included. CALCULATION OF ALLOWANCE FOR CREDIT LOSSES Pooled allowances The allowance is measured on a collective (pool) basis when similar risk characteristics exist. Segmentation variables for commercial and investor real estate segments include product, loan size, collateral type, risk rating and term. Segmentation variables considered for consumer segments include product, FICO, LTV, age, TDR status, etc. The allowance is estimated for most portfolios and classes using econometric models to estimate expected credit losses. In general, discounted cash flow models are not used for the purpose of estimating expected losses for the purpose of the ACL. Most of the econometric models include PD, LGD, and EAD components. Less complex estimation methods are used for smaller loan portfolios. Specific allowances Due to their size, complexity and individualized risk characteristics and monitoring, the allowance for significant non-accrual commercial and investor real estate loans (including TDRs) and unfunded commitments is measured on an individual basis. Loans evaluated individually are not included in the collective evaluation. Regions generally measures the allowance for these loans based on the present value of estimated cash flows, considering all facts and circumstances specific to the borrower and market and economic conditions. The allowance measurement for collateral-dependent loans that meet the individually evaluated threshold is based on the fair value of collateral methodology. TDRs and RETDRs Loans identified as TDRs and RETDRs are treated consistently in CECL loss models. These loans are included in their respective loan pools (if they do not qualify for specific evaluation) and losses are determined by CECL models. The effect of the interest rate concession on these loans is considered through a post-model adjustment. Qualitative framework While quantitative allowance methodologies strive to reflect all risk factors, any estimate involves assumptions and uncertainties resulting in some level of imprecision. Imprecision exists in the estimation process due to the inherent time lag between obtaining information, performing the calculation, as well as variations between estimates and actual outcomes. Regions adjusts the allowance considering quantitative and qualitative factors which may not be directly measured in the modeled calculations. Regions' qualitative framework provides for specific, quantitatively supported model adjustments and general imprecision adjustments. Specific model adjustments capture highly specific issues or events that Regions believes are not adequately captured in model outcomes. General imprecision adjustments address other sources of imprecision that are not specifically identifiable or quantifiable to a particular loan portfolio and have not been captured by the model or by a specific model adjustment. Regions considers general imprecision in three dimensions; economic forecast imprecision, model error imprecision, and process imprecision. Refer to Note 6 for further discussion regarding the calculation of the allowance for credit losses.
Lessee, Leases [Policy Text Block]	LESSEES Regions' lease portfolio is primarily composed of property leases that are classified as either operating or finance leases with the majority classified as operating leases. Property leases, which primarily include office locations and retail branches, typically have original lease terms ranging from 1 year to 20 years, some of which may also include an option to extend the lease beyond the original lease term. In some circumstances, Regions may also have an option to terminate the lease early with advance notice. Regions includes renewal and termination options within the lease term if deemed reasonably certain of exercise. As most leases do not state an implicit rate, Regions utilizes the incremental borrowing rate based on information available at the lease commencement date to determine the present value of lease payments. Leases with a term of 12 months or less are not recorded on the balance sheet. Regions continues to recognize lease payments as an expense over the lease term as appropriate. The remainder of the lease portfolio is comprised of equipment leases that have remaining lease terms of 1 year to 4 years.
Lessor, Leases [Policy Text Block]	LESSORS Regions engages in both direct financing and sales-type leasing. Regions also has portfolios of leveraged and operating leases. These arrangements provide equipment financing for leased assets, such as vehicles and aircraft. At the commencement date, Regions (lessor) enters into an agreement with the customer (lessee) to lease the underlying equipment for a specified lease term. The lease agreements may provide customers the option to terminate the lease by buying the equipment at fair market value at the time of termination or at the end of the lease term. Regions' equipment finance asset management group performs due diligence procedures on the lease residual and overall equipment values as part of the origination process. Regions performs lease residual value reviews on an ongoing basis. In order to manage the residual value risk inherent in some of its direct financing leases, Regions purchases residual value insurance from an independent third party.
Other Earning Assets [Policy Text Block]	OTHER EARNING ASSETS Other earning assets consist primarily of investments in FRB stock, FHLB stock, marketable equity securities and operating lease assets. See Note 8 for additional information. INVESTMENTS IN FEDERAL RESERVE BANK AND FEDERAL HOME LOAN BANK STOCK Ownership of FRB and FHLB stock is a requirement for all banks seeking membership into and access to the services provided by these banking systems. These shares are accounted for at amortized cost, which approximates fair value. MARKETABLE EQUITY SECURITIES Marketable equity securities are recorded at fair value with changes in fair value reported in net income. INVESTMENTS IN OPERATING LEASES Investments in operating leases represent the assets underlying the related lease contracts and are reported at cost, less accumulated depreciation and net of origination fees and costs. Depreciation on these assets is generally provided on a straight-line basis over the lease term down to an estimated residual value. Regions periodically evaluates its depreciation rate for leased
Property, Plant and Equipment, Policy [Policy Text Block]	PREMISES AND EQUIPMENT Premises and equipment are stated at cost, less accumulated depreciation and amortization, as applicable. Land is carried at cost. Depreciation expense is computed using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized using the straight-line method over the estimated useful lives of the improvements (or the terms of the leases, if shorter). Generally, premises and leasehold improvements are depreciated or amortized over 7-40 years. Furniture and equipment are generally depreciated or amortized over 3-10 years. Premises and equipment are evaluated for impairment at least annually, or more often if events or circumstances indicate that the carrying value of the asset may not be recoverable. Maintenance and repairs are charged to non-interest expense in the consolidated statements of income. Improvements that either add functionality or extend the useful life of the asset are capitalized to the carrying value and depreciated. See Note 9 for detail of premises and equipment.
Goodwill and Intangible Assets, Policy [Policy Text Block]	INTANGIBLE ASSETS Intangible assets include goodwill, which is the excess of cost over the fair value of net assets of acquired businesses, and other identifiable intangible assets. Other identifiable intangible assets primarily include the following: 1) core deposit intangible assets, which are amounts recorded related to the value of acquired indeterminate maturity deposits, 2) amounts capitalized related to the value of acquired customer relationships, and 3) the DUS license. Core deposit intangibles, purchased credit card relationships, customer relationship intangibles and other identifiable intangibles assets are amortized over their expected useful lives. The Company’s goodwill is tested for impairment on an annual basis in the fourth quarter, or more often if events or circumstances indicate that there may be impairment. Regions assesses the following indicators of goodwill impairment for each reporting period: • Recent operating performance, • Changes in market capitalization, • Regulatory actions and assessments, • Changes in the business climate (including legislation, legal factors and competition), • Company-specific factors (including changes in key personnel, asset impairments, and business dispositions), and • Trends in the banking industry. Adverse changes in the economic environment, declining operations, or other factors could result in a decline in the implied estimated fair value of goodwill. Accounting guidance permits the Company to first assess qualitative factors to determine if it is more likely than not that the fair value of a reporting unit exceeds its carrying value. If, based on the weight of the evidence, the Company determines it is more likely than not that the fair value exceeds book value, then an impairment test is not necessary. If the Company elects to bypass the qualitative assessment, or concludes that it is more likely than not that the fair value is less than the carrying value, a goodwill impairment test is performed. The Company compares the estimated fair value of a reporting unit with its carrying amount, including goodwill. If the estimated fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is considered not impaired. If the carrying amount of a reporting unit exceeds its estimated fair value, an impairment loss is recognized in non-interest expense in an amount equal to that excess. For purposes of performing the qualitative assessment, Regions evaluates events and circumstances which may include, but are not limited to, events and circumstances since the last impairment analysis, recent operating performance including reporting unit performance, changes in market capitalization, regulatory actions and assessments, changes in the business climate, company-specific factors, and trends in the banking industry to determine if it is more likely than not that the fair value of a reporting unit exceeds its carrying amount. For purposes of performing the goodwill impairment test, if applicable, Regions uses both income and market approaches to value its reporting units. The income approach, which is the primary valuation approach, consists of discounting projected long-term future cash flows, which are derived from internal forecasts and economic expectations for the respective reporting units. The significant inputs to the income approach include expected future cash flows, the long-term target equity ratios, and the discount rate. Other identifiable intangible assets, primarily core deposit intangibles, purchased credit card relationships and other acquired customer relationships, are reviewed at least annually (usually in the fourth quarter) for events or circumstances that could impact the recoverability of the intangible asset. These events could include loss of core deposits, significant losses of credit card or other types of acquired customer accounts and/or balances, increased competition, or adverse changes in the economy. To the extent other identifiable intangible assets are deemed unrecoverable, impairment losses are recorded in non-interest expense and reduce the carrying amount of the asset. Refer to Note 10 for further detail and discussion of the results of the goodwill and other identifiable intangibles impairment tests.
Transfers and Servicing of Financial Assets, Policy [Policy Text Block]	ACCOUNTING FOR TRANSFERS AND SERVICING OF FINANCIAL ASSETS Regions accounts for transfers of financial assets as sales when control over the transferred assets is surrendered. Control is generally considered to have been surrendered when 1) the transferred assets are legally isolated from the Company or its consolidated affiliates, even in bankruptcy or other receivership, 2) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to the Company, and 3) the Company does not maintain the obligation or unilateral ability to reclaim or repurchase the assets. If these sale criteria are met, the transferred assets are removed from the Company’s balance sheet and a gain or loss on sale is recognized. If not met, the transfer is recorded as a secured borrowing, and the assets remain on the Company’s balance sheet, the proceeds from the transaction are recognized as a liability, and gain or loss on sale is deferred until the sale criterion are achieved. Regions has elected to account for its residential MSRs using the fair value measurement method. Under the fair value measurement method, residential MSRs are measured at estimated fair value each period with changes in fair value recorded as a component of mortgage income. 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 residential mortgages in the servicing portfolio could result in significant valuation adjustments, thus creating potential volatility in the carrying amount of residential MSRs. The valuation method relies on an OAS to consider prepayment risk and equate the asset's discounted cash flows to its market price. See the “Fair Value Measurements” section below for additional discussion regarding determination of fair value. Regions is a DUS lender. The DUS program provides liquidity to the multi-family housing market. Regions' related commercial MSRs are recorded in other assets on the consolidated balance sheets at the lower of cost or estimated fair value and are amortized in proportion to, and over the estimated period that net servicing income is expected to be received based on projections of the amount and timing of estimated future net cash flows. The amount and timing of estimated future net cash flows are updated based on actual results and updated projections. Regions periodically evaluates its commercial MSRs for impairment. Regions has a one-third loss share guarantee associated with the majority of the DUS servicing portfolio. The other two-thirds loss share guarantee is retained by Fannie Mae. The estimated fair value of the loss share guarantee is recorded in other liabilities on the consolidated balance sheets. Refer to Note 7 for further information on servicing of financial assets.
Finance, Loan and Lease Receivables, Held for Investments, Foreclosed Assets Policy [Policy Text Block]	FORECLOSED PROPERTY AND OTHER REAL ESTATE Other real estate and certain other assets acquired in satisfaction of indebtedness (“foreclosure”) are carried in other assets at the lower of the recorded investment in the loan or estimated fair value less estimated costs to sell the property. At the date of transfer from the loan portfolio, if the recorded investment in the loan exceeds the property’s estimated fair value less estimated costs to sell, a write-down is recorded against the allowance. Regions allows a period of up to 60 days after the date of transfer to record finalized write-downs as charge-offs against the allowance in order to properly accumulate all related invoices and updated valuation information, if necessary. Subsequent to transfer, Regions obtains valuations from professional valuation experts and/or third party appraisers on at least an annual basis. See the “Fair Value Measurements” section below for additional discussion regarding determination of fair value. Subsequent to transfer and the additional 60 days, any further write-downs are recorded as other non-interest expense. Gain or loss on the sale of foreclosed property and other real estate is included in other non-interest expense.
Derivatives, Policy [Policy Text Block]	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES The Company enters into derivative financial instruments to manage interest rate risk, facilitate asset/liability management strategies and manage other exposures. These instruments primarily include interest rate swaps, options on interest rate swaps, options including interest rate caps and floors, Eurodollar futures, forward rate contracts and forward sale commitments. All derivative financial instruments are recognized on the consolidated balance sheets as other assets or other liabilities, as applicable, at estimated fair value. Regions enters into master netting agreements with counterparties and/or requires collateral to cover exposures. In at least some cases, counterparties post collateral at a zero threshold regardless of credit rating. The majority of interest rate derivatives traded by Regions with dealing counterparties are subject to mandatory clearing through a central clearinghouse. The variation margin payments made for derivatives cleared through a central clearinghouse are legally characterized as settlements of the derivatives. As a result, these positions are reflected as settled with no fair value presented for purposes of the balance sheets and related disclosures. The counterparty risk for cleared trades effectively moves from the executing broker to the clearinghouse allowing Regions to benefit from the risk mitigation controls in place at the respective clearinghouse. Interest rate swaps are agreements to exchange interest payments based upon notional amounts. Interest rate swaps subject Regions to market risk associated with changes in interest rates, changes in interest rate volatility as well as the credit risk that the counterparty will fail to perform. Option contracts involve rights to buy or sell financial instruments on a specified date or over a period at a specified price. These rights do not have to be exercised. Some option contracts such as interest rate floors, involve the exchange of cash based on changes in specified indices. Interest rate floors are contracts to hedge interest rate declines based on a notional amount, generally associated with a principal balance at risk. Interest rate floors subject Regions to market risk associated with changes in interest rates, changes in interest rate volatility, as well as the credit risk that the counterparty will fail to perform. Forward rate contracts are commitments to buy or sell financial instruments at a future date at a specified price or yield. Regions primarily enters into forward rate contracts on marketable instruments, which expose Regions to market risk associated with changes in the value of the underlying financial instrument, as well as the credit risk that the counterparty will fail to perform. Eurodollar futures are futures contracts on Eurodollar deposits. Eurodollar futures subject Regions to market risk associated with changes in interest rates. Because futures contracts are cash settled daily through a margining process in an exchange, there is minimal credit risk associated with Eurodollar futures. Forward sale commitments are sales of securities at a specified price at a future date. Forward sale commitments subject Regions to market risk associated with changes in market value, as well as the credit risk that the counterparty will fail to perform. The Company elects to account for certain derivative financial instruments as accounting hedges which, based on the exposure being hedged, are either fair value or cash flow hedges. Fair value hedge relationships mitigate exposure to the change in fair value of the hedged risk in an asset, liability or firm commitment. Under the fair value hedging model, gains or losses attributable to the change in fair value of the derivative instrument, as well as the gains and losses attributable to the change in fair value of the hedged item, are recognized in interest income or interest expense in the same income statement line item with the hedged item in the period in which the change in fair value occurs. To the extent the changes in fair value of the derivative do not offset the changes in fair value of the hedged item, the difference is recognized. The corresponding adjustment to the hedged asset or liability is included in the basis of the hedged item, while the corresponding change in the fair value of the derivative instrument is recorded as an adjustment to other assets or other liabilities, as applicable. Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. For cash flow hedge relationships, the entire change in the fair value of the hedging instrument would be recorded in accumulated other comprehensive income (loss) except for amounts excluded from the assessment of hedge effectiveness. Amounts recorded in accumulated other comprehensive income (loss) are recognized in earnings in the same income statement line item where the earnings effect of the hedged item is presented in the period or periods during which the hedged item impacts earnings. The Company formally documents all hedging relationships, as well as its risk management objective and strategy for entering into various hedge transactions. The Company performs periodic qualitative and quantitative assessments to determine whether the hedging relationship has been highly effective in offsetting changes in fair values or cash flows of hedged items and whether the relationship is expected to continue to be highly effective in the future. If a hedge relationship is de-designated or if hedge accounting is discontinued because the hedged item no longer exists, or does not meet the definition of a firm commitment, or because it is probable that the forecasted transaction will not occur, the derivative will continue to be recorded as an other asset or other liability in the consolidated balance sheets at its estimated fair value, with changes in fair value recognized in other non-interest expense. Any asset or liability that was recorded pursuant to recognition of the firm commitment is removed from the consolidated balance sheets and recognized in other non-interest expense. Gains and losses that were unrecognized and aggregated in accumulated other comprehensive income (loss) pursuant to the hedge of a forecasted transaction are recognized immediately in other non-interest expense. Derivative contracts for which the Company has not elected to apply hedge accounting are classified as other assets or liabilities with gains and losses related to the change in fair value recognized in capital markets income or mortgage income, as applicable, in the statements of income during the period. These positions, as well as non-derivative instruments, are used to mitigate economic and accounting volatility related to customer derivative transactions, the mortgage pipeline and the fair value of residential MSRs. 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. Accordingly, such commitments are recorded at estimated fair value with changes in fair value recorded in mortgage income or capital markets income, as applicable. Regions also has corresponding forward sale commitments related to these interest rate lock commitments, which are recorded at estimated fair value with changes in fair value recorded in mortgage income or capital markets income, as applicable. See the “Fair Value Measurements” section below for additional information related to the valuation of interest rate lock commitments. Regions enters into various derivative agreements with customers desiring protection from possible future market fluctuations. Regions manages the market risk associated with these derivative agreements. The contracts in this portfolio for which the Company has elected not to apply hedge accounting are marked-to-market through capital markets income and included in other assets and other liabilities. Concurrent with the election to use fair value measurement for residential MSRs, Regions began using various derivative instruments to mitigate the impact of changes in the fair value of residential MSRs in the statements of income. This effort may involve the use of various derivative instruments, including, but not limited to, forwards, futures, swaps and options. These derivatives are carried at estimated fair value, with changes in fair value reported in mortgage income. Refer to Note 21 for further discussion and details of derivative financial instruments and hedging activities.
Income Tax, Policy [Policy Text Block]	INCOME TAXES The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for expected future tax consequences. Under this method, deferred tax assets and liabilities are determined by applying the federal and state tax rates to the differences between financial statement carrying amounts and the corresponding tax bases of assets and liabilities. Deferred tax assets are also recorded for any tax attributes, such as tax credit and net operating loss carryforwards. The net balance of deferred tax assets and liabilities is reported in other assets or other liabilities in the consolidated balance sheets, as appropriate. Any effect of a change in federal and state tax rates on deferred tax assets and liabilities is recognized in income tax expense in the period that includes the enactment date. The Company reflects the expected amount of income tax to be paid or refunded during the year as current income tax expense or benefit, as applicable. The Company determines the realization of deferred tax assets by considering all positive and negative evidence available, including the impact of recent operating results, future reversals of taxable temporary differences, future taxable income exclusive of reversing temporary differences and carryforwards and tax planning strategies. A valuation allowance is recorded for any deferred tax assets that are not more-likely-than-not to be realized. Income tax benefits generated from uncertain tax positions are accounted for using the recognition and cumulative-probability measurement thresholds. Based on the technical merits, if a tax benefit is not more-likely-than-not of being sustained upon examination, the Company records a liability for the recognized income tax benefit. If a tax benefit is more-likely-than-not of being sustained based on the technical merits, the Company utilizes the cumulative probability measurement and records an income tax benefit equivalent to the largest amount of tax benefit that is greater than 50 percent likely to be realized upon ultimate settlement with a taxing authority. The Company recognizes interest expense, interest income and penalties related to unrecognized tax benefits within current income tax expense. The Company applies the proportional amortization method in accounting for its qualified affordable housing investments. This method recognizes the amortized cost of the investment as a component of income tax expense. The deferral method of accounting is used for investments that generate investment tax credits. Under this method, the investment tax credits are recognized as a reduction of the related asset. Refer to Note 20 for further discussion regarding income taxes.
Treasury Stock and Share Repurchases [Policy Text Block]	TREASURY STOCK AND SHARE REPURCHASES The purchase of the Company’s common stock is recorded at cost. At the date of repurchase, shareholders' equity is reduced by the repurchase price. Upon retirement, or upon purchase for constructive retirement, treasury stock would be reduced by the cost of such stock with the excess of repurchase price over par or stated value recorded in additional paid-in capital. If the Company subsequently reissues treasury shares, treasury stock is reduced by the cost of such stock with differences recorded in additional paid-in capital or retained earnings, as applicable. Pursuant to recent share repurchase programs, shares repurchased were immediately retired, and therefore were not included in treasury stock. The Company's policy related to these share repurchases is to reduce its common stock based on the par value of the shares repurchased and to reduce its additional paid-in capital for the excess of the repurchase price over the par value.
Compensation Related Costs, Policy [Policy Text Block]	SHARE-BASED PAYMENTS Regions sponsors stock plans which most commonly include restricted stock (i.e., unvested common stock) units, restricted stock awards, performance stock units and stock options. The Company accounts for share-based payments under the fair value recognition provisions whereby compensation cost is measured based on the estimated fair value of the award at the grant date and is recognized in the consolidated financial statements on a straight-line basis over the requisite service period for service-based awards. The fair value of restricted stock units, restricted stock awards or performance stock units is determined based on the closing price of Regions common stock on the date of grant. Historical data is also used to estimate future employee attrition, which is considered in calculating estimated forfeitures. Estimated forfeitures are adjusted when actual forfeitures differ from estimates, resulting in the recognition of compensation cost only for awards that vest. The effect of a change in estimated forfeitures is recognized through a cumulative catch-up adjustment that is included in salaries and employee benefits expense in the period of the change in estimate. The fair value of stock options where vesting is based on service is estimated at the date of grant using a Black-Scholes option pricing model and related assumptions. As compensation cost is recognized, a deferred tax asset is recorded that represents an estimate of the future tax deduction from exercise or release of restrictions. At the time the share-based awards are exercised, cancelled, have expired, or restrictions are released, the Company may be required to recognize an adjustment to tax expense depending on the market price of the Company’s common stock. See Note 17 for further discussion and details of share-based payments.
Pension and Other Postretirement Plans, Pensions, Policy [Policy Text Block]	EMPLOYEE BENEFIT PLANS Regions uses an expected long-term rate of return applied to the fair market value of assets as of the beginning of the year and the expected cash flows during the year for calculating the expected investment return on all pension plan assets. At a minimum, amortization of the net gain or loss included in accumulated other comprehensive income resulting from experience different from that assumed and from changes in assumptions is included as a component of net periodic benefit cost if, as of the beginning of the year, that net gain or loss exceeds 10 percent of the greater of the projected benefit obligation or the market value of plan assets. If amortization is required, the minimum amortization is that excess divided by the average remaining service period of active participating employees expected to receive benefits under the plans. Regions records the service cost component of net periodic pension and postretirement benefit cost in salaries and employee benefits expense on the consolidated statements of income. The other components of net periodic pension and postretirement benefit cost are recorded in other non-interest expense on the consolidated statements of income. Regions uses a third-party actuary to compute the remaining service period of active participating employees. This period reflects expected turnover, pre-retirement mortality, and other applicable employee demographics. See Note 18 for further discussion and details of employee benefit plans.
Revenue Recognition, Policy [Policy Text Block]	REVENUE RECOGNITION Interest Income The largest source of revenue for Regions is interest income. Interest income is recognized using the interest method driven by nondiscretionary formulas based on written contracts, such as loan agreements or securities contracts. Service Charges on Deposit Accounts Service charges on deposit accounts include non-sufficient fund fees and other service charges. Non-sufficient fund fees are earned when a depositor presents an item for payment in excess of available funds, and Regions, at its discretion, provides the necessary funds to complete the transaction. Regions generates other service charges by providing depositors proper safeguard and remittance of funds as well as by providing optional services for depositors, such as check imaging or treasury management, that are performed upon the depositor’s request. Charges for the proper safeguard and remittance of funds are recognized monthly, as the customer retains funds in the account. Regions recognizes revenue for other optional services when the customer uses the selected service to execute a transaction (e.g., execute an ACH wire). Card and ATM Fees Card and ATM fees include the combined amounts of credit card, debit card, and ATM related revenue. The majority of the fees are card interchange where Regions earns a fee for remitting cardholder funds (or extends credit) via a third party network to merchants. Regions satisfies performance obligations for each transaction when the card is used and the funds are remitted. The network establishes interchange fees that the merchant remits to Regions for each transaction, and Regions incurs costs from the network for facilitating the interchange with the merchant. Due to its inability to establish prices and direct activities of the related processing network’s service, Regions is deemed the agent in this arrangement and records interchange revenues net of related costs. Regions also pays consideration to certain commercial card holders based on interchange fees and contractual volume. These costs are recognized as a reduction to interchange income. Card and ATM fees also include ATM fee income generated from allowing a Regions cardholder to withdraw funds from a non-Regions ATM and from allowing a non-Regions cardholder to withdraw funds from a Regions ATM. Regions satisfies performance obligations for each transaction when the withdrawal is processed. Regions does not direct activities of the related processing network’s service and recognizes revenue on a net basis as the agent in each transaction. Investment Management and Trust Fee Income Investment management and trust fee income represents revenue generated from asset management services provided to individuals, businesses, and institutions. Regions has a fiduciary responsibility to the beneficiary of the trust to perform agreed upon services which can include investing the assets, periodic reporting to the beneficiaries, and providing tax information regarding the trust. In exchange for these trust and custodial services, Regions collects fee income from beneficiaries as contractually determined via fee schedules. Regions’ performance obligations to customers are primarily satisfied over time as the services are performed and provided to the customer. Mortgage Income Mortgage income is recognized when earned or as each transaction occurs through the origination and servicing of residential mortgage loans for long-term investors and sales of residential mortgage loans in the secondary market. Mortgage income also includes any fair value adjustments for mortgage loans Regions has elected to measure under the fair value option and fair value adjustments related to mortgage servicing rights. Capital Markets Income Regions generates capital markets fee revenue through capital raising activities which include revenue streams such as securities underwriting and placement, loan syndication and placement, as well as foreign exchange, derivatives, merger and acquisition and other advisory services. For those revenue streams, revenue is primarily recognized at a point in time which coincides with the satisfaction of a single performance obligation, typically the transaction closing. Securities underwriting and placement fees involve the issuing and distribution of securities for an underwriting fee from customers. The underwriting fee is a single performance obligation which is satisfied at the time that the transaction is closed, and the amount of the fee is either a fixed or variable percentage based on the deal value which is determinable at the time of deal closing. Regions generates revenue from affordable housing investments through the syndication of investment funds to third parties. Regions transfers the primary benefits of the investment to the customer and recognizes syndication revenue on the closing date of the transaction. Bank-Owned Life Insurance Bank-owned life insurance income primarily represents income earned from the appreciation of the cash surrender value of insurance contracts held and the proceeds of insurance benefits. Regions recognizes revenue each period in the amount of the appreciation of the cash surrender value of the insurance policies. Revenue from the proceeds of insurance benefits is recognized at the time a claim is confirmed. Commercial Credit Fee Income Commercial credit fee income includes letters of credit fees and unused commercial commitment fees. Regions recognizes revenue for letters of credit fees over time. Regions recognizes revenue for unused commercial commitment fees on the date that the commitment expires. Investment Services Fee Income Investment services fee income represents income earned from investment advisory services. Through the use of third party carriers, Regions provides its customers with access to investment products that meet customers’ financial needs and investment objectives. Upon selection of an investment product, the customer enters into a policy with the carrier. Regions’ performance obligation is satisfied by fulfilling its responsibility to place customers in investment vehicles for which Regions earns commissions from the carrier based on agreed-upon fee percentages. In addition, Regions has a contractual relationship with a third party broker dealer to provide full service brokerage and investment advisory activities. As the principal in the arrangement, Regions recognizes the investment services commissions on a gross basis. Securities Gains (Losses), Net Net securities gains or losses result from Regions’ asset/liability management process. Gains or losses on the sale of securities are recognized as each sales transaction occurs with the cost of securities sold based on the specific identification method. Market Value Adjustments on Employee Benefit Assets Regions holds assets for certain employee benefit assets, both defined and other. Those assets are recorded at estimated fair value and the market value variations are recognized each period.
Earnings Per Share, Policy [Policy Text Block]	PER SHARE AMOUNTSEarnings per common share is calculated by dividing net income available to common shareholders by the weighted-average number of common shares outstanding during the period. Diluted earnings per common share is calculated by dividing net income available to common shareholders by the weighted-average number of common shares outstanding during the period, plus the effect of outstanding stock options, restricted and performance stock awards if dilutive. Refer to Note 16 for additional information
Fair Value of Financial Instruments, Policy [Policy Text Block]	FAIR VALUE MEASUREMENTS Fair value guidance establishes a framework for using fair value to measure assets and liabilities and defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) as opposed to the price that would be paid to acquire the asset or received to assume the liability (an entry price). A fair value measure should reflect the assumptions that market participants would use in pricing the asset or liability, including the assumptions about the risk inherent in a particular valuation technique, the effect of a restriction on the sale or use of an asset and the risk of nonperformance. Required disclosures include stratification of balance sheet amounts measured at fair value based on inputs the Company uses to derive fair value measurements. These strata include: • Level 1 valuations, where the valuation is based on quoted market prices for identical assets or liabilities traded in active markets (which include exchanges and over-the-counter markets with sufficient volume), • Level 2 valuations, where the valuation is based on quoted market prices for similar instruments traded in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market, and • Level 3 valuations, where the valuation is generated from model-based techniques that use significant assumptions not observable in the market, but observable based on Company-specific data. These unobservable assumptions reflect the Company’s own estimates for assumptions that market participants would use in pricing the asset or liability. Valuation techniques typically include option pricing models, discounted cash flow models and similar techniques, but may also include the use of market prices of assets or liabilities that are not directly comparable to the subject asset or liability. ITEMS MEASURED AT FAIR VALUE ON A RECURRING BASIS Debt securities available for sale, certain mortgage loans held for sale, marketable equity securities, residential MSRs, derivative assets and derivative liabilities are recorded at fair value on a recurring basis. Below is a description of valuation methodologies for these assets and liabilities. Debt securities available for sale consist of U.S. Treasuries, obligations of states and political subdivisions, mortgage-backed securities (including agency securities), and other debt securities. • U.S. Treasuries are valued based on quoted market prices of identical assets on active exchanges. Pricing received for U.S. Treasuries from third-party services is based on a market approach using dealer quotes from multiple active market makers and real-time trading systems. These valuations are Level 1 measurements. • Mortgage-backed securities are valued primarily using data from third-party pricing services for similar securities as applicable. Pricing from these third-party services is generally based on a market approach using observable inputs such as benchmark yields, reported trades, broker/dealer quotes, benchmark securities, TBA prices, issuer spreads, bids and offers, monthly payment information, and collateral performance, as applicable. These valuations are Level 2 measurements. Where such comparable data is not available, the Company develops valuations based on assumptions that are not readily observable in the market place; these valuations are Level 3 measurements. • Obligations of states and political subdivisions are generally based on data from third-party pricing services. The valuations are based on a market approach using observable inputs such as benchmark yields, MSRB reported trades, material event notices and new issue data. These valuations are Level 2 measurements. Where such comparable data is not available, the Company develops valuations based on assumptions that are not readily observable in the market place; these valuations are Level 3 measurements. • Other debt securities are valued based on Level 1, 2 and 3 measurements, depending on pricing methodology selected and are valued primarily using data from third-party pricing services. Pricing from these third-party services is generally based on a market approach using observable inputs such as benchmark yields, reported trades, broker/dealer quotes, issuer spreads, benchmark securities, bids and offers, and TRACE reported trades. The majority of Regions' debt securities available for sale are valued using third-party pricing services. To validate pricing related to liquid investment securities, which represent the vast majority of the available for sale portfolio (e.g., mortgage- backed securities), Regions compares price changes received from the third-party pricing service to overall changes in market factors in order to validate the pricing received. To validate pricing received on less liquid investment securities in the available for sale portfolio, Regions receives pricing from third-party brokers-dealers on a sample of securities that are then compared to the pricing received. The pricing service uses standard observable inputs when available, for example: benchmark yields, reported trades, broker-dealer quotes, issuer spreads, benchmark securities, and bids and offers, among others. For certain security types, additional inputs may be used, or some inputs may not be applicable. It is not customary for Regions to adjust the pricing received for the available for sale portfolio. In the event that prices are adjusted, Regions classifies the measurement as a Level 3 measurement. Mortgage loans held for sale consist of residential first mortgage loans and commercial mortgages held for sale. Regions has elected to measure certain residential and commercial mortgage loans held for sale at fair value by applying the fair value option (see additional discussion under the “Fair Value Option” section in Note 22). The residential first mortgage loans held for sale are valued 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 value and market conditions, a Level 2 measurement. The commercial mortgage loans held for sale are valued based on traded market prices for comparable commercial mortgage-backed securitizations, into which the loans will be placed, adjusted for movements of interest rates and credit spreads, a Level 3 measurement due to the unobservable inputs included in the credit spreads for bonds in commercial mortgage-backed securitizations. Marketable equity securities, which primarily consist of assets held for certain employee benefits and money market funds, are valued based on quoted market prices of identical assets on active exchanges; these valuations are Level 1 measurements. Residential mortgage servicing rights are valued using an option-adjusted spread valuation approach, a Level 3 measurement. The underlying assumptions and estimated values are corroborated at least quarterly by values received from independent third parties. See Note 7 for information regarding the servicing of financial assets and additional details regarding the assumptions relevant to this valuation. Derivative assets and liabilities, which primarily consist of interest rate, foreign exchange, and commodity contracts that include forwards, futures, options and swaps, are included in other assets and other liabilities (as applicable) on the consolidated balance sheets. Interest rate swaps are predominantly traded in over-the-counter markets and, as such, values are determined using widely accepted discounted cash flow models, which are Level 2 measurements. These discounted cash flow models use projections of future cash payments/receipts that are discounted at an appropriate index rate. Regions utilizes OIS curves as fair value measurement inputs for the valuation of interest rate and commodity derivatives. The projected future cash flows are sourced from an assumed yield curve, which is consistent with industry standards and conventions. These valuations are adjusted for the unsecured credit risk at the reporting date, which considers collateral posted and the impact of master netting agreements. For options and futures contracts traded in over-the-counter markets, values are determined using discounted cash flow analyses and option pricing models based on market rates and volatilities, which are Level 2 measurements. Interest rate lock commitments on loans intended for sale and risk participations categorized as credit derivatives are valued using option pricing models that incorporate significant unobservable inputs, and therefore are Level 3 measurements. Equity investments, which consists of the Company's holding in an equity investee that is traded on an active exchange, is valued using a quoted market price for a similar instrument in an active market, adjusted for marketability considerations; this valuation is a Level 2 measurement. ITEMS MEASURED AT FAIR VALUE ON A NON-RECURRING BASIS From time to time, certain assets may be recorded at fair value on a non-recurring basis. These non-recurring fair value adjustments typically are a result of the application of lower of cost or fair value accounting or a write-down occurring during the period. For example, if the fair value of an asset in these categories falls below its cost basis, it is considered to be at fair value at the end of the period of the adjustment. In periods where there is no adjustment, the asset is generally not considered to be at fair value. The following is a description of the valuation methodologies used for assets measured at fair value on a non-recurring basis. Foreclosed property and other real estate is carried in other assets at the lower of the recorded investment in the loan or fair value less estimated costs to sell the property. The fair value for foreclosed property that is based on either observable transactions of similar instruments or formally committed sale prices is classified as a Level 2 measurement. If no formally committed sale price is available, Regions also obtains valuations from professional valuation experts and/or third party appraisers. Updated valuations are obtained on at least an annual basis. Foreclosed property exceeding established dollar thresholds is valued based on appraisals. Appraisals are performed by third-parties with appropriate professional certifications and conform to generally accepted appraisal standards as evidenced by the Uniform Standards of Professional Appraisal Practice. Regions’ policies related to appraisals conform to regulations established by the Financial Institutions Reform, Recovery and Enforcement Act of 1989 and other regulatory guidance. Professional valuations are considered Level 2 measurements because they are based largely on observable inputs. Regions has a centralized appraisal review function that is responsible for reviewing appraisals for compliance with banking regulations and guidelines as well as appraisal standards. Based on these reviews, Regions may make adjustments to the market value conclusions determined in the appraisals of real estate (either as other real estate or loans held for sale) when the appraisal review function determines that the valuation is based on inappropriate assumptions or where the conclusion is not sufficiently supported by the market data presented in the appraisal. Adjustments to the market value conclusions are discussed with the professional valuation experts and/or third-party appraisers; the magnitude of the adjustments that are not mutually agreed upon is insignificant. Adjustments, if made, must be based on sufficient information available to support an alternate opinion of market value. An estimated standard discount factor, which is updated at least annually, is applied to the appraisal amount for certain commercial and investor real estate properties when the recorded investment in the loan is transferred into foreclosed property. Internally adjusted valuations are considered Level 3 measurements as management uses assumptions that may not be observable in the market. These non-recurring fair value measurements are typically recorded on the date an updated offered quote, appraisal, or third-party valuation is received. Equity investments without a readily determinable fair value are adjusted prospectively to estimated fair value when an observable price transaction for a same or similar investment with the same issuer occurs; these valuations are Level 3 measurements. Loans held for sale for which the fair value option has not been elected are recorded at the lower of cost or fair value and therefore may be reported at fair value on a non-recurring basis. The fair values for commercial loans held for sale are based on Company-specific data not observable in the market. These valuations are Level 3 measurements. FAIR VALUE OF FINANCIAL INSTRUMENTS The following methods and assumptions were used by the Company in estimating fair values of financial instruments that are not disclosed above: Cash and cash equivalents : The carrying amounts reported in the consolidated balance sheets and statements of cash flows approximate the estimated fair values. Because these amounts generally relate to either currency or highly liquid assets, these are considered Level 1 valuations. Debt securities held to maturity : The fair values of debt securities held to maturity are estimated in the same manner as the corresponding debt securities available for sale, which are measured at fair value on a recurring basis. Loans (excluding sales-type, direct financing, and leveraged leases), net of unearned income and allowance for loan losses : A discounted cash flow method under the income approach is utilized to estimate the fair value of the loan portfolio. The discounted cash flow method relies upon assumptions about the amount and timing of scheduled principal and interest payments, principal prepayments, and current market rates. The loan portfolio is aggregated into categories based on loan type and credit quality. For each loan category, weighted average statistics, such as coupon rate, age, and remaining term are calculated. These are Level 3 valuations. Other earning assets (excluding equity investments and operating leases) : The carrying amounts reported in the consolidated balance sheets approximate the estimated fair values. While these instruments are not actively traded in the market, the majority of the inputs required to value them are actively quoted and can be validated through external sources. Accordingly, these are Level 2 valuations. Deposits : The fair value of non-interest-bearing demand accounts, interest-bearing transaction accounts, savings accounts, money market accounts and certain other time deposit accounts is the amount payable on demand at the reporting date (i.e., the carrying amount). Fair values for certificates of deposit are estimated by using discounted cash flow analyses, based on market spreads to benchmark rates. These are Level 2 valuations. Short-term and long-term borrowings : The carrying amounts of short-term borrowings reported in the consolidated balance sheets approximate the estimated fair values, and are considered Level 2 measurements as similar instruments are traded in active markets. The fair values of certain long-term borrowings are estimated using quoted market prices of identical instruments in active markets and are considered Level 1 measurements. The fair values of certain long term borrowings are estimated using quoted market prices of identical instruments in non-active markets and are considered Level 2 valuations. Otherwise, valuations are based on non-binding broker quotes and are considered Level 3 valuations. Loan commitments and letters of credit : The fair value of these instruments is reasonably estimated by the carrying value of deferred fees plus the unfunded loan commitments reserve related to the creditworthiness of our counterparty. Because the valuation inputs are not observable in the market and are considered Company specific, these are Level 3 valuations.
New Accounting Pronouncements, Policy [Policy Text Block]	RECENT ACCOUNTING PRONOUNCEMENTS The following table provides a brief description of accounting standards adopted in 2020 and those that could have a material impact to Regions’ consolidated financial statements upon adoption in the future. Standard Description Required Date of Adoption Effect on Regions' financial statements or other significant matters Standards Adopted (or partially adopted) in 2020 ASU 2016-13, Measurement of Credit Losses on Financial Instruments This ASU amends Topic 326, Financial Instruments- Credit Losses to replace the current incurred loss accounting model with a current expected credit loss approach (CECL) for financial instruments measured at amortized cost and other commitments to extend credit. The amendments require entities to consider all available relevant information when estimating current expected credit losses, including details about past events, current conditions, and R&S forecasts. The resulting allowance for credit losses is to reflect the portion of the amortized cost basis that the entity does not expect to collect. January 1, 2020 The allowance increased by $501 million based on loan exposure balances and Regions' internally developed macroeconomic forecast upon adoption of CECL on January 1, 2020. The increase in the allowance at adoption was primarily the result of significant increases within the consumer portfolio segment, specifically residential first mortgages, home equity loans, home equity lines, and indirect-other consumer. The impact to the residential first mortgage and home equity classes was mainly driven by their longer time to maturity. Additionally, a significant portion of the indirect-other consumer class is unsecured lending through third parties which yielded higher loss rates. Under CECL these higher loss rates compounded over a life of loan estimate result in a significantly larger allowance estimate. A suite of controls including governance, data, forecast and model controls was in place at adoption. The impact was reflected as a reduction of approximately $375 million to retained earnings and an increase of approximately $126 million to deferred tax assets. In the third quarter of 2020, the Federal Banking agencies finalized a rule related to the impact of CECL on regulatory capital. The rule allows an add-back to regulatory capital for the impacts of CECL for a two-year period. At the end of the two years, the impact is then phased in over the following three years. The add-back is calculated as the impact of initial adoption, plus 25 percent of subsequent changes in allowance. At December 31, 2020 this amount is approximately $582 million year-to-date. The impact on CET1 is approximately 54 basis points. There was no material impact to available for sale or held to maturity securities upon adoption of CECL, nor to any other financial assets in scope. Most of the held to maturity portfolio consists of agency-backed securities that inherently have an immaterial risk of loss. Additionally, Regions had no purchase credit impaired assets that were converted to PCD upon adoption. See relevant sections of this note for additional information about Regions' CECL methodologies and assumptions. ASU 2017-04, Simplifying the Test for Goodwill Impairment This ASU amends Topic 350, Intangibles-Goodwill and Other, and eliminates Step 2 from the goodwill impairment test. January 1, 2020 The adoption of this guidance did not have a material impact. ASU 2018-15, Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement This ASU amends Topic 350-40, Intangibles-Goodwill and Other-Internal-Use Software, regarding a customer's accounting for implementation, set-up, and other upfront costs incurred in a cloud computing arrangement that is hosted by the vendor, i.e. a service contract. Customers will apply the same criteria for capitalizing implementation costs as they would for an arrangement that has a software license. The amendments also prescribe the balance sheet, income statement, and cash flow classification of the capitalized implementation costs and related amortization expense, and require additional quantitative and qualitative disclosures. January 1, 2020 The adoption of this guidance did not have a material impact. ASU 2018-17, Targeted Improvements to Related Party Guidance for Variable Interest Entities This ASU amends Topic 810, Consolidation, guidance on how all reporting entities evaluate indirect interests held through related parties in common control arrangements when determining whether fees paid to decision makers and service providers are variable interests. January 1, 2020 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 Adopted (or partially adopted) in 2020 (continued) ASU 2019-04, Codification Improvements to Topics 815 and 825 This ASU amends Topic 815, Derivatives and Hedging, by providing clarification on ASU 2017-12, which the Company previously adopted. The amendment provides clarity on the term used to measure the change in fair value on a partial term hedge of interest rate risk. The amendment also provides additional guidance on the amortization of the basis adjustment on partial term hedges. January 1, 2020 The adoption of this guidance did not have a material impact. ASU 2019-08 Compensation - Stock Compensation (Topic 718) and Revenue from Contracts with Customers (Topic 606) The amendments in this Update require that an entity measure and classify share-based payment awards granted to a customer by applying the guidance in Topic 718. The amount recorded as a reduction of the transaction price is required to be measured on the basis of the grant-date fair value of the share-based payment award measured in accordance with Topic 718. The grant date is the date at which a grantor (supplier) and grantee (customer) reach a mutual understanding of the key terms and conditions of a share-based payment award. The classification and subsequent measurement of the award are subject to the guidance in Topic 718 unless the share-based payment award is subsequently modified and the grantee is no longer a customer. January 1, 2020 The adoption of this guidance did not have a material impact. ASU 2020-03, Codification Improvements to Financial Instruments 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. This ASU provides clarification for disclosures related to the fair value option and debt securities and minor updates to Topics 470, Debt, 820, Fair Value Measurement, 842, Leases, and 860, Transfers and Servicing. The Update is effective upon issuance. The adoption of this guidance did not have a material impact. ASU 2020-04, Reference Rate Reform - Topic 848 This Update provides temporary optional expedients and exceptions to the GAAP guidance on contract modifications, hedge accounting, and other transactions affected that reference LIBOR or another reference rate expected to be discontinued. The Update is effective upon issuance and can be applied through December 31, 2022. Regions adopted this ASU on July 1, 2020, and at the time of adoption, there was no material impact. Regions anticipates optional expedients adopted such as contract modification and hedge accounting will provide significant relief otherwise not provided through December 31, 2022. ASU 2020-09, Debt (Topic 470)— Amendments to SEC Paragraphs Pursuant to SEC Release No. 33-10762 The amendments in this Update were issued to amend and supersede the SEC section of Topic 470, Debt, to reflect the guidance on guaranteed debt securities offerings in SEC Release 33-10762 which related to financial disclosure requirements for subsidiary issuers and guarantors of registered debt securities and affiliates whose securities are pledged as collateral for registered securities. The Update is effective upon issuance. 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 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 Regions adopted this guidance as of January 1, 2021 with no 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 Regions adopted this guidance as of January 1, 2021 with no material impact ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging— Contracts in Entity’s Own Equity 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. 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 Regions adopted this guidance as of January 1, 2021 with no 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 Regions is evaluating the impact upon adoption; however, the impact is not expected to be material.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Supplemental Cash Flow Information	The following table summarizes supplemental cash flow information for the years ended December 31: 2020 2019 2018 (In millions) Cash paid during the period for: Interest on deposits and borrowings $ 408 $ 851 $ 581 Income taxes, net 132 85 57 Non-cash transfers: Loans held for sale and loans transferred to other real estate 31 63 54 Loans transferred to loans held for sale 275 66 313 Loans held for sale transferred to loans 1 3 14 Properties transferred to held for sale 33 62 21

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure Variable Interest Entities Schedule Of Equity Method Investments [Abstract]
Affordable Housing Tax Credit Investments	A summary of Regions’ affordable housing tax credit investments and related loans and letters of credit, representing Regions’ maximum exposure to loss as of December 31 is as follows: 2020 2019 (In millions) Affordable housing tax credit investments included in other assets $ 975 $ 932 Unfunded affordable housing tax credit commitments included in other liabilities 249 $ 213 Loans and letters of credit commitments 243 $ 265 Funded portion of loans and letters of credit commitments 130 $ 157 2020 2019 2018 (In millions) Tax credits and other tax benefits recognized $ 164 $ 165 $ 174 Tax credit amortization expense included in provision for income taxes 133 131 137
Equity Method Investments	A summary of Regions' equity method investments representing Regions' maximum exposure to loss as of December 31 is as follows: 2020 2019 (In millions) Gross equity method investments $ 186 $ 176 Unfunded equity method commitments 57 72 Net funded equity method investments included in other assets $ 129 $ 104

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	The following table represents the condensed results of operations for the Regions Insurance Group, Inc. entities sold as discontinued operations in 2018: Year Ended December 31, 2018 (In millions) Interest income $ 1 Interest expense — Net interest income 1 Non-interest income: Securities gains (losses), net (1) Insurance commissions and fees 69 Gain on sale of business 281 Other — Total non-interest income 349 Non-interest expense: Salaries and employee benefits 49 Net occupancy expense 3 Furniture and equipment expense 2 Other 16 Total non-interest expense 70 Income from discontinued operations before income taxes 280 Income tax expense 84 Income from discontinued operations, net of tax $ 196 The following table represents the condensed results of operations for both the Regions Insurance Group, Inc. entities and Morgan Keegan and Company, Inc. and related affiliates as discontinued operations: Year Ended December 31 2020 2019 2018 (In millions, except per share data) Income from discontinued operations before income taxes $ — $ — $ 271 Income tax expense — — 80 Income from discontinued operations, net of tax $ — $ — $ 191 Earnings per common share from discontinued operations: Basic $ 0.00 $ 0.00 $ 0.18 Diluted $ 0.00 $ 0.00 $ 0.17

Debt Securities (Tables)

Debt Securities (Tables)	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule Of Amortized Cost, Gross Unrealized Gains And Losses, And Estimated Fair Value Of Securities Available For Sale And 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: 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 December 31, 2019 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 $ 736 $ — $ (26) $ 710 $ 22 $ — $ 732 Commercial agency 625 — (3) 622 20 (2) 640 $ 1,361 $ — $ (29) $ 1,332 $ 42 $ (2) $ 1,372 Debt securities available for sale: U.S. Treasury securities $ 180 $ 2 $ — $ 182 $ 182 Federal agency securities 42 1 — 43 43 Mortgage-backed securities: Residential agency 15,336 218 (38) 15,516 15,516 Residential non-agency 1 — — 1 1 Commercial agency 4,720 77 (31) 4,766 4,766 Commercial non-agency 639 8 — 647 647 Corporate and other debt securities 1,414 38 (1) 1,451 1,451 $ 22,332 $ 344 $ (70) $ 22,606 $ 22,606 _________ (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 Securities Available For Sale And 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 December 31, 2020, 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 $ 554 $ 569 Commercial agency 589 646 $ 1,143 $ 1,215 Debt securities available for sale: Due in one year or less $ 200 $ 202 Due after one year through five years 828 873 Due after five years through ten years 267 299 Due after ten years 111 118 Mortgage-backed securities: Residential agency 18,455 19,076 Residential non-agency 1 1 Commercial agency 5,659 5,999 Commercial non-agency 571 586 $ 26,092 $ 27,154
Schedule Of Gross Unrealized Losses And Estimated Fair Value Of 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 December 31, 2020 and 2019. 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. 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) December 31, 2019 Less Than Twelve Months Twelve Months or More Total Estimated Gross Estimated Gross Estimated Gross (In millions) Debt securities held to maturity: Mortgage-backed securities: Residential agency $ 82 $ — $ 501 $ (5) $ 583 $ (5) Commercial agency — — 127 (5) 127 (5) $ 82 $ — $ 628 $ (10) $ 710 $ (10) Debt securities available for sale: Mortgage-backed securities: Residential agency $ 2,402 $ (11) $ 2,505 $ (27) $ 4,907 $ (38) Commercial agency 1,449 (31) 73 — 1,522 (31) Corporate and other debt securities 19 — 32 (1) 51 (1) $ 3,870 $ (42) $ 2,610 $ (28) $ 6,480 $ (70)
Schedule Of Gross Realized Gains And Gross Realized Losses On Available For Sale Securities	Gross realized gains and gross realized losses on sales of debt securities available for sale are shown in the table below. 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 identify a limited number of positions where impairment was believed to exist in certain periods, as shown in the table below. 2020 2019 2018 (In millions) Gross realized gains $ 5 $ 16 $ 4 Gross realized losses (1) (43) (1) Impairment — (1) (2) Securities gains (losses), net $ 4 $ (28) $ 1

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Schedule Of Loan Portfolio, Net Of Unearned Income	The following table presents the distribution of Regions' loan portfolio by segment and class, net of unearned income as of December 31: 2020 2019 (In millions) Commercial and industrial $ 42,870 $ 39,971 Commercial real estate mortgage—owner-occupied 5,405 5,537 Commercial real estate construction—owner-occupied 300 331 Total commercial 48,575 45,839 Commercial investor real estate mortgage 5,394 4,936 Commercial investor real estate construction 1,869 1,621 Total investor real estate 7,263 6,557 Residential first mortgage 16,575 14,485 Home equity lines 4,539 5,300 Home equity loans 2,713 3,084 Indirect—vehicles 934 1,812 Indirect—other consumer 2,431 3,249 Consumer credit card 1,213 1,387 Other consumer 1,023 1,250 Total consumer 29,428 30,567 Total loans, net of unearned income (1) $ 85,266 $ 82,963 _________

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Analysis Of The Allowance For Credit Losses By Portfolio Segment	2020 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, December 31, 2019 $ 537 $ 45 $ 287 $ 869 Cumulative change in accounting guidance (Note 1) (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 927 129 256 1,312 Initial allowance on acquired PCD loans 60 — — 60 Loan losses: Charge-offs (368) (1) (244) (613) Recoveries 43 3 55 101 Net loan losses (325) 2 (189) (512) Allowance for loan losses, December 31, 2020 $ 1,196 $ 183 $ 788 $ 2,167 Reserve for unfunded credit commitments, December 31, 2019 41 4 — 45 Cumulative change in accounting guidance (Note 1) 36 13 14 63 Reserve for unfunded credit commitments, January 1, 2020 (adjusted for change in accounting guidance) 77 17 14 108 Provision (credit) for unfunded credit losses 20 (3) 1 18 Reserve for unfunded credit commitments, December 31, 2020 97 14 15 126 Allowance for credit losses, December 31, 2020 $ 1,293 $ 197 $ 803 $ 2,293 2019 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, January 1, 2019 $ 520 $ 58 $ 262 $ 840 Provision (credit) for loan losses 138 (16) 265 387 Loan losses: Charge-offs (150) (1) (292) (443) Recoveries 29 4 52 85 Net loan losses (121) 3 (240) (358) Allowance for loan losses, December 31, 2019 537 45 287 869 Reserve for unfunded credit commitments, January 1, 2019 47 4 — 51 Provision (credit) for unfunded credit losses (6) — — (6) Reserve for unfunded credit commitments, December 31, 2019 41 4 — 45 Allowance for credit losses, December 31, 2019 $ 578 $ 49 $ 287 $ 914 Portion of ending allowance for loan losses: Individually evaluated for impairment $ 120 $ 4 $ 29 $ 153 Collectively evaluated for impairment 417 41 258 716 Total allowance for loan losses $ 537 $ 45 $ 287 $ 869 Portion of loan portfolio ending balance: Individually evaluated for impairment $ 537 $ 34 $ 381 $ 952 Collectively evaluated for impairment 45,302 6,523 30,186 82,011 Total loans evaluated for impairment $ 45,839 $ 6,557 $ 30,567 $ 82,963 2018 Commercial Investor Real Consumer Total (In millions) Allowance for loan losses, January 1, 2018 $ 591 $ 64 $ 279 $ 934 Provision (credit) for loan losses 32 (5) 202 229 Loan losses: Charge-offs (148) (9) (276) (433) Recoveries 45 8 57 110 Net loan losses (103) (1) (219) (323) Allowance for loan losses, December 31, 2018 520 58 262 840 Reserve for unfunded credit commitments, January 1, 2018 49 4 — 53 Provision (credit) for unfunded credit losses (2) — — (2) Reserve for unfunded credit commitments, December 31, 2018 47 4 — 51 Allowance for credit losses, December 31, 2018 $ 567 $ 62 $ 262 $ 891 Portion of ending allowance for loan losses: Individually evaluated for impairment $ 104 $ 2 $ 26 $ 132 Collectively evaluated for impairment 416 56 236 708 Total allowance for loan losses $ 520 $ 58 $ 262 $ 840 Portion of loan portfolio ending balance: Individually evaluated for impairment $ 490 $ 25 $ 419 $ 934 Collectively evaluated for impairment 44,725 6,411 31,082 82,218 Total loans evaluated for impairment $ 45,215 $ 6,436 $ 31,501 $ 83,152
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, as of 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, 2019, for disclosure of the Credit Quality Indicators as of December 31, 2019. 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 $ 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 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 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 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 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 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) 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 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.
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 December 31, 2020 and December 31, 2019. Loans on non-accrual status with no related allowance included $112 million of commercial and industrial loans as of December 31, 2020. Non–accrual loans with no related allowance typically include loans where the underlying collateral is deemed sufficient to recover all remaining principal. Prior to the adoption of CECL on January 1, 2020, all TDRs and all non-accrual commercial and investor real estate loans, excluding leases, were deemed to be impaired. The definition of impairment and the required impaired loan disclosures were removed with CECL. Refer to Note 6 "Allowance for Credit Losses" in the Annual Report on Form 10-K for the year ended December 31, 2019 for disclosure of Regions' impaired loans as of December 31, 2019. Loans that have been fully charged-off do not appear in the tables below. 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 2019 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total Total Non-accrual Total (In millions) Commercial and industrial $ 30 $ 21 $ 11 $ 62 $ 39,624 $ 347 $ 39,971 Commercial real estate mortgage—owner-occupied 11 3 1 15 5,464 73 5,537 Commercial real estate construction—owner-occupied 2 — — 2 320 11 331 Total commercial 43 24 12 79 45,408 431 45,839 Commercial investor real estate mortgage 1 1 — 2 4,934 2 4,936 Commercial investor real estate construction — — — — 1,621 — 1,621 Total investor real estate 1 1 — 2 6,555 2 6,557 Residential first mortgage 83 47 136 266 14,458 27 14,485 Home equity lines 30 12 32 74 5,259 41 5,300 Home equity loans 12 6 10 28 3,078 6 3,084 Indirect—vehicles 31 10 7 48 1,812 — 1,812 Indirect—other consumer 16 9 3 28 3,249 — 3,249 Consumer credit card 11 8 19 38 1,387 — 1,387 Other consumer 13 5 5 23 1,250 — 1,250 Total consumer 196 97 212 505 30,493 74 30,567 $ 240 $ 122 $ 224 $ 586 $ 82,456 $ 507 $ 82,963
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. 2020 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 151 250 — Commercial real estate mortgage—owner-occupied 21 16 — Commercial real estate construction—owner-occupied 1 1 — Total commercial 173 267 — Commercial investor real estate mortgage 11 78 — Commercial investor real estate construction 4 5 — Total investor real estate 15 83 — Residential first mortgage 378 85 11 Home equity lines — — — Home equity loans 43 4 — Consumer credit card 14 — — Indirect—vehicles and other consumer 66 1 — Total consumer 501 90 11 689 440 11 2019 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 97 $ 259 $ 3 Commercial real estate mortgage—owner-occupied 51 29 — Commercial real estate construction—owner-occupied 1 2 — Total commercial 149 290 3 Commercial investor real estate mortgage 12 26 — Commercial investor real estate construction 12 18 2 Total investor real estate 24 44 2 Residential first mortgage 159 32 4 Home equity lines — — — Home equity loans 99 7 — Consumer credit card 37 — — Indirect—vehicles and other consumer 75 1 — Total consumer 370 40 4 543 $ 374 $ 9

Servicing of Financial Assets (

Servicing of Financial Assets (Tables)	12 Months Ended
	Dec. 31, 2020
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 for the years ended December 31: 2020 2019 2018 (In millions) Carrying value, beginning of year $ 345 $ 418 $ 336 Additions 108 42 111 Increase (decrease) in fair value: Due to change in valuation inputs or assumptions (89) (62) 18 Economic amortization associated with borrower repayments (1) (68) (53) (47) Carrying value, end of year $ 296 $ 345 $ 418 _________ (1) "Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns. In the first quarter of 2020, Regions revised its MSR decay methodology from a passage of time approach to a discounted net cash flow approach. The change in methodology results in shifts between decay and hedge impacts, but does not impact the overall valuation.
Data And Assumptions Used In The Fair Value Calculation As Well As The Valuation's Sensitivity To Rate Fluctuations Related To 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) as of December 31 are as follows: 2020 2019 (Dollars in millions) Unpaid principal balance $ 34,454 $ 34,467 Weighted-average CPR (%) 15.6 % 12.0 % Estimated impact on fair value of a 10% increase $ (23) $ (19) Estimated impact on fair value of a 20% increase $ (42) $ (35) Option-adjusted spread (basis points) 560 618 Estimated impact on fair value of a 10% increase $ (7) $ (8) Estimated impact on fair value of a 20% increase $ (13) $ (16) Weighted-average coupon interest rate 3.9 % 4.2 % Weighted-average remaining maturity (months) 287 278 Weighted-average servicing fee (basis points) 27.5 27.3
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 for the years ended December 31: 2020 2019 2018 (In millions) Servicing related fees and other ancillary income $ 95 $ 102 $ 95

Other Earning Assets (Tables)

Other Earning Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Other Earning Assets [Abstract]
Schedule Of Investments in Federal Reserve Bank Stock And Federal Home Loan Bank Stock	The following table presents the amount of Regions' investments in FRB and FHLB stock as of December 31: 2020 2019 (In millions) Federal Reserve Bank $ 492 $ 492 Federal Home Loan Bank 15 209

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Premises and Equipment	A summary of premises and equipment, net at December 31 is as follows: 2020 2019 (In millions) Land $ 434 $ 446 Premises and improvements 1,678 1,783 Furniture and equipment 1,041 1,023 Software 836 756 Leasehold improvements 413 407 Construction in progress 208 199 4,610 4,614 Accumulated depreciation and amortization (2,713) (2,654) $ 1,897 $ 1,960

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill allocated to each reportable segment (each a reporting unit) at December 31 is presented as follows: 2020 2019 (In millions) Corporate Bank $ 2,819 $ 2,474 Consumer Bank 1,978 1,978 Wealth Management 393 393 $ 5,190 $ 4,845
Summary Of Other Intangible Assets	The following table presents other intangibles and related accumulated amortization as of December 31: 2020 2019 2020 2019 2020 2019 Gross Carrying Amount Accumulated Amortization Net Carrying Amount (In millions) Core deposit intangibles $ 1,011 $ 1,011 $ 991 $ 980 $ 20 $ 31 Purchased credit card relationship assets 175 175 149 140 26 35 Other—amortizing (1) 82 36 24 15 58 21 DUS license (2) 15 15 Other—non-amortizing (3) 3 3 $ 1,268 $ 1,222 $ 1,164 $ 1,135 $ 122 $ 105 _________ (1) Includes intangible assets primarily related to acquired trust services, trade names, intellectual property, customer relationships, and employee agreements. (2) The DUS license is a non-amortizing intangible asset.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The aggregate amount of amortization expense for core deposit intangibles, purchased credit card relationship assets, and other intangible assets is estimated as follows: Year Ended December 31 (In millions) 2021 $ 27 2022 22 2023 18 2024 12 2025 8

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Schedule Of Interest-Bearing Deposits	The following schedule presents a detail of interest-bearing deposits at December 31: 2020 2019 (In millions) Savings $ 11,635 $ 8,640 Interest-bearing transaction 24,484 20,046 Money market—domestic 29,719 25,326 Time deposits 5,341 7,442 Interest-bearing customer deposits 71,179 61,454 Corporate treasury time deposits 11 108 Corporate treasury other deposits — 1,800 Total interest-bearing deposits $ 71,190 $ 63,362
Schedule Of Aggregate Amount Of Maturities Of All Time Deposits	At December 31, 2020, the aggregate amounts of maturities of all time deposits (deposits with stated maturities, consisting primarily of certificates of deposit and IRAs) were as follows: December 31, 2020 (In millions) 2021 $ 3,721 2022 843 2023 446 2024 149 2025 102 Thereafter 91 $ 5,352

Long-Term Borrowings (Tables)

Long-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2020
Long-term Borrowings [Abstract]
Schedule of Long-term Debt Instruments	Long-term borrowings at December 31 consist of the following: 2020 2019 (In millions) Regions Financial Corporation (Parent): 3.20% senior notes due February 2021 $ 360 $ 358 2.75% senior notes due August 2022 — 997 3.80% senior notes due August 2023 997 996 2.25% senior notes due April 2025 744 — 7.75% subordinated notes due September 2024 100 100 6.75% subordinated debentures due November 2025 155 156 7.375% subordinated notes due December 2037 298 298 Valuation adjustments on hedged long-term debt 64 45 2,718 2,950 Regions Bank: FHLB advances — 2,501 2.75% senior notes due April 2021 190 549 3 month LIBOR plus 0.38% of floating rate senior notes due April 2021 66 350 3.374% senior notes converting to 3 month LIBOR plus 0.50%, callable August 2020, due August 2021 — 499 3 month LIBOR plus 0.50% of floating rate senior notes, callable August 2020, due August 2021 — 499 6.45% subordinated notes due June 2037 496 495 Ascentium note securitizations 97 — Other long-term debt 2 32 Valuation adjustments on hedged long-term debt — 4 851 4,929 Total consolidated $ 3,569 $ 7,879
Schedule of Maturities of Long-term Debt	The aggregate amount of contractual maturities of all long-term debt in each of the next five years and thereafter is as follows: Year Ended December 31 Regions Regions (In millions) 2021 $ 360 $ 256 2022 — — 2023 1,061 — 2024 100 40 2025 899 57 Thereafter 298 498 $ 2,718 $ 851

Regulatory Capital Requiremen_2

Regulatory Capital Requirements and Regulations (Tables)	12 Months Ended
	Dec. 31, 2020
Banking and Thrift, Other Disclosures [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The following tables summarize the applicable holding company and bank regulatory capital requirements: December 31, 2020 (1) Minimum Requirement To Be Well Amount Ratio Basel III Regulatory Capital Rules (Dollars in millions) Common equity Tier 1 capital: Regions Financial Corporation $ 10,525 9.84 % 4.50 % N/A Regions Bank 12,972 12.17 4.50 6.50 % Tier 1 capital: Regions Financial Corporation $ 12,181 11.39 % 6.00 % 6.00 % Regions Bank 12,972 12.17 6.00 8.00 Total capital: Regions Financial Corporation $ 14,498 13.56 % 8.00 % 10.00 % Regions Bank 14,803 13.89 8.00 10.00 Leverage capital: Regions Financial Corporation $ 12,181 8.71 % 4.00 % N/A Regions Bank 12,972 9.30 4.00 5.00 % December 31, 2019 Minimum Requirement To Be Well Amount Ratio Basel III Regulatory Capital Rules (Dollars in millions) Common equity Tier 1 capital: Regions Financial Corporation $ 10,228 9.68 % 4.50 % N/A Regions Bank 12,212 11.58 4.50 6.50 % Tier 1 capital: Regions Financial Corporation $ 11,537 10.91 % 6.00 % 6.00 % Regions Bank 12,212 11.58 6.00 8.00 Total capital: Regions Financial Corporation $ 13,406 12.68 % 8.00 % 10.00 % Regions Bank 13,621 12.92 8.00 10.00 Leverage capital: Regions Financial Corporation $ 11,537 9.65 % 4.00 % N/A Regions Bank 12,212 10.24 4.00 5.00 % _________ (1) The 2020 Basel III CET1 capital, Tier 1 capital, Total capital, and Leverage capital ratios are estimated.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Lessee, Operating Leases [Text Block]	Other information related to operating leases at December 31 is as follows: 2020 2019 Weighted-average remaining lease term (years) 9.6 years 9.3 years Weighted-average discount rate (%) 2.7 % 3.2 %
Future, undiscounted minimum lease payments on operating leases	Future, undiscounted minimum lease payments on operating leases are as follows: December 31, 2020 (In millions) 2021 $ 99 2022 92 2023 84 2024 70 2025 58 Thereafter 248 Total lease payments 651 Less: Imputed interest 106 Total present value of lease liabilities $ 545
Summary of sales-type, direct financing, operating, and leveraged leases	The following tables present a summary of Regions' sales-type, direct financing, operating, and leveraged leases for the years ended December 31: Net Interest Income 2020 2019 (In millions) Sales-Type and Direct Financing $ 59 $ 33 Operating 8 11 Leveraged (1) 14 14 $ 81 $ 58 _________ (1) Leveraged lease income is shown pre-tax with related tax expense of $8 million for December 31, 2020 and $9 million for December 31, 2019. Leveraged lease termination gains excluded from amounts presented above were immaterial at both December 31, 2020 and 2019. As of December 31, 2020 Sales-Type and Direct Financing Operating Leveraged Total (In millions) Lease receivable $ 1,293 $ 60 $ 174 $ 1,527 Unearned income (232) (15) (96) (343) Guaranteed residual 36 — — 36 Unguaranteed residual 183 155 144 482 Total net investment $ 1,280 $ 200 $ 222 $ 1,702 As of December 31, 2019 Sales-Type and Direct Financing Operating Leveraged Total (In millions) Lease receivable $ 1,068 $ 113 $ 182 $ 1,363 Unearned income (215) (29) (113) (357) Guaranteed residual 32 — — 32 Unguaranteed residual 152 213 147 512 Total net investment $ 1,037 $ 297 $ 216 $ 1,550
Minimum future payments due from customers for sales-type, direct financing, and operating leases	The following table presents the minimum future payments due from customers for sales-type, direct financing, and operating leases: December 31, 2020 Sales-Type and Direct Financing Operating Total (In millions) 2021 $ 297 $ 24 $ 321 2022 236 14 250 2023 178 7 185 2024 118 6 124 2025 76 3 79 Thereafter 388 6 394 $ 1,293 $ 60 $ 1,353

Stockholders' Equity and Accu_2

Stockholders' Equity and Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Summary of the non-cumulative perpetual preferred stock	The following table presents a summary of the non-cumulative perpetual preferred stock as of December 31: 2020 2019 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) 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 — $ 1,850 $ 1,656 $ 1,310 _________ (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 years ended December 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 on unrealized losses (2) 8 (2) 6 Ending balance $ (21) $ 5 $ (16) Unrealized gains (losses) on securities available for sale: Beginning balance $ 274 $ (69) $ 205 Unrealized holding gains (losses) arising during the period 792 (200) 592 Reclassification adjustments for securities (gains) losses realized in net income (3) (4) 1 (3) Change in AOCI from securities available for sale activity in the period 788 (199) 589 Ending balance $ 1,062 $ (268) $ 794 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 1,440 (363) 1,077 Reclassification adjustments for (gains) losses realized in net income (2) (260) 65 (195) Change in AOCI from derivative activity in the period 1,180 (298) 882 Ending balance $ 1,610 $ (406) $ 1,204 Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (795) $ 200 $ (595) Net actuarial gains (losses) arising during the period (144) 36 (108) Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (4) 47 (11) 36 Change in AOCI from defined benefit pension plans and other post employment benefits activity in the period (97) 25 (72) Ending balance $ (892) $ 225 $ (667) Total other comprehensive income 1,879 (474) 1,405 Total accumulated other comprehensive income, end of period $ 1,759 $ (444) $ 1,315 2019 Pre-tax AOCI Activity Tax Effect (1) Net AOCI Activity (In millions) Total accumulated other comprehensive income (loss), beginning of period $ (1,289) $ 325 $ (964) Unrealized losses on securities transferred to held to maturity: Beginning balance $ (36) $ 9 $ (27) Reclassification adjustments for amortization on unrealized losses (2) 7 (2) 5 Ending balance $ (29) $ 7 $ (22) Unrealized gains (losses) on securities available for sale: Beginning balance $ (531) $ 134 $ (397) Unrealized holding gains (losses) arising during the period 777 (196) 581 Reclassification adjustments for securities (gains) losses realized in net income (3) 28 (7) 21 Change in AOCI from securities available for sale activity in the period 805 (203) 602 Ending balance $ 274 $ (69) $ 205 Unrealized gains (losses) on derivative instruments designated as cash flow hedges: Beginning balance $ (84) $ 21 $ (63) Unrealized holding gains (losses) on derivatives arising during the period 490 (123) 367 Reclassification adjustments for (gains) losses realized in net income (2) 24 (6) 18 Change in AOCI from derivative activity in the period 514 (129) 385 Ending balance $ 430 $ (108) $ 322 Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (638) $ 161 $ (477) Net actuarial gains (losses) arising during the period (200) 50 (150) Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (4) 43 (11) 32 Change in AOCI from defined benefit pension plans and other post employment benefits activity in the period (157) 39 (118) Ending balance $ (795) $ 200 $ (595) Total other comprehensive income 1,169 (295) 874 Total accumulated other comprehensive income (loss), end of period $ (120) $ 30 $ (90) 2018 Pre-tax AOCI Activity Tax Effect (1) Net AOCI Activity (In millions) Total accumulated other comprehensive income (loss), beginning of period $ (1,002) $ 253 $ (749) Unrealized losses on securities transferred to held to maturity: Beginning balance $ (45) 12 $ (33) Reclassification adjustments for amortization on unrealized losses (2) 9 (3) 6 Ending balance $ (36) 9 $ (27) Unrealized gains (losses) on securities available for sale: Beginning balance $ (204) $ 51 $ (153) Unrealized holding gains (losses) arising during the period (327) 83 (244) Ending balance $ (531) $ 134 $ (397) Unrealized gains (losses) on derivative instruments designated as cash flow hedges: Beginning balance $ (68) $ 17 $ (51) Unrealized holding gains (losses) on derivatives arising during the period (4) 1 (3) Reclassification adjustments for (gains) losses realized in net income (2) (12) 3 (9) Change in AOCI from derivative activity in the period (16) 4 (12) Ending balance $ (84) $ 21 $ (63) Defined benefit pension plans and other post employment benefit plans: Beginning balance $ (685) $ 173 $ (512) Net actuarial gains (losses) arising during the period 11 (4) 7 Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (4) 36 (8) 28 Change in AOCI from defined benefit pension plans and other post employment benefits activity in the period 47 (12) 35 Ending balance $ (638) $ 161 $ (477) Total other comprehensive income (287) 72 (215) Total accumulated other comprehensive income (loss), end of period $ (1,289) $ 325 $ (964) ____ (1) The tax impact of each component of AOCI is 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 18 for additional details).

Earnings (Loss) per Common Sh_2

Earnings (Loss) per Common Share (Tables)	12 Months Ended
	Dec. 31, 2020
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 for the years ended December 31: 2020 2019 2018 (In millions, except per share data) Numerator: Income from continuing operations $ 1,094 $ 1,582 $ 1,568 Preferred stock dividends (103) (79) (64) Income from continuing operations available to common shareholders 991 1,503 1,504 Income from discontinued operations, net of tax — — 191 Net income available to common shareholders $ 991 $ 1,503 $ 1,695 Denominator: Weighted-average common shares outstanding—basic 959 995 1,092 Potential common shares 3 4 10 Weighted-average common shares outstanding—diluted 962 999 1,102 Earnings per common share from continuing operations available to common shareholders (1) : Basic $ 1.03 $ 1.51 $ 1.38 Diluted 1.03 1.50 1.36 Earnings per common share from discontinued operations (1) : Basic $ 0.00 $ 0.00 $ 0.18 Diluted 0.00 0.00 0.17 Earnings per common share (1) : Basic $ 1.03 $ 1.51 $ 1.55 Diluted 1.03 1.50 1.54 ________ (1) Certain per share amounts may not appear to reconcile due to rounding.

Share-Based Payments (Tables)

Share-Based Payments (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Summary Of Compensation Costs Recognized In The Consolidated Statements Of Operations	The following table summarizes the elements of compensation cost recognized in the consolidated statements of income for the years ended December 31: 2020 2019 2018 (In millions) Compensation cost of share-based compensation awards: Restricted and performance stock awards $ 53 $ 51 $ 50 Tax benefits related to share-based compensation cost (13) (13) (13) Compensation cost of share-based compensation awards, net of tax $ 40 $ 38 $ 37
Summary Of Activity Related To Stock Options	The following table summarizes the activity for 2020, 2019 and 2018 related to stock options: Number of Weighted- Aggregate Weighted-Average Remaining Contractual Term Outstanding at December 31, 2017 9,407,898 $ 16.58 $ 35 1.05 years Granted — — Exercised (1,619,206) 7.08 Forfeited or expired (6,063,969) 21.88 Outstanding at December 31, 2018 1,724,723 $ 6.86 $ 11 1.74 years Granted — — Exercised (756,954) 6.93 Forfeited or expired — — Outstanding at December 31, 2019 967,769 $ 6.80 $ 10 0.83 years Granted — — Exercised (911,181) 6.80 Forfeited or expired (29,917) 7.00 Outstanding at December 31, 2020 26,671 $ 6.54 $ — 0.41 years Exercisable at December 31, 2020 26,671 $ 6.54 $ — 0.41 years The aggregate intrinsic value of exercised options was $8 million for 2020, $8 million for 2019, and $10 million for 2018. Cash received from options exercised was $5 million, $5 million, and $11 million in 2020, 2019, and 2018, respectively. The actual tax benefit realized for the tax deductions from options exercised totaled $1 million for 2020, $2 million for 2019, and $4 million for 2018.
Summary Of Activity Related to Restricted Stock Awards And Performance Stock Awards	Activity related to restricted stock awards and performance stock awards for 2020, 2019 and 2018 is summarized as follows: Number of Weighted-Average Non-vested at December 31, 2017 15,263,034 $ 10.12 Granted 3,051,090 18.17 Vested (6,038,566) 9.64 Forfeited (747,021) 13.00 Non-vested at December 31, 2018 11,528,537 $ 12.32 Granted 3,971,303 14.70 Vested (6,068,969) 8.47 Forfeited (433,513) 15.25 Non-vested at December 31, 2019 8,997,358 $ 15.62 Granted 6,466,526 8.46 Vested (3,314,572) 14.60 Forfeited (467,152) 11.86 Non-vested at December 31, 2020 11,682,160 $ 12.14

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Schedule of Defined Benefit Plans Disclosures	The following table sets forth the plans’ change in benefit obligation, plan assets and funded status, using a December 31 measurement date, and amounts recognized in the consolidated balance sheets at December 31: Qualified Plans Non-qualified Plans Total 2020 2019 2020 2019 2020 2019 (In millions) Change in benefit obligation Projected benefit obligation, beginning of year $ 2,192 $ 1,865 $ 172 $ 145 $ 2,364 $ 2,010 Service cost 34 28 5 3 39 31 Interest cost 64 75 4 5 68 80 Actuarial (gains) losses 278 349 21 33 299 382 Benefit payments (130) (122) (14) (7) (144) (129) Administrative expenses (3) (3) — — (3) (3) Plan settlements — — — (7) — (7) Projected benefit obligation, end of year $ 2,435 $ 2,192 $ 188 $ 172 $ 2,623 $ 2,364 Change in plan assets Fair value of plan assets, beginning of year $ 2,299 $ 2,105 $ — $ — $ 2,299 $ 2,105 Actual return on plan assets 303 319 — — 303 319 Company contributions — — 14 14 14 14 Benefit payments (130) (122) (14) (7) (144) (129) Administrative expenses (3) (3) — — (3) (3) Plan settlements — — — (7) — (7) Fair value of plan assets, end of year $ 2,469 $ 2,299 $ — $ — $ 2,469 $ 2,299 Funded status and accrued benefit (cost) at measurement date $ 34 $ 107 $ (188) $ (172) $ (154) $ (65) Amount recognized in the Consolidated Balance Sheets: Other assets $ 34 $ 107 $ — $ — $ 34 $ 107 Other liabilities — — (188) (172) (188) (172) $ 34 $ 107 $ (188) $ (172) $ (154) $ (65) Pre-tax amounts recognized in Accumulated Other Comprehensive (Income) Loss: Net actuarial loss $ 819 $ 736 $ 80 $ 66 $ 899 $ 802
Components Of Net Periodic Benefit Costs	Net periodic pension cost (benefit) included the following components for the years ended December 31: Qualified Plans Non-qualified Plans Total 2020 2019 2018 2020 2019 2018 2020 2019 2018 (In millions) Service cost $ 34 $ 28 $ 35 $ 5 $ 3 $ 3 $ 39 $ 31 $ 38 Interest cost 64 75 70 4 5 5 68 80 75 Expected return on plan assets (148) (137) (153) — — — (148) (137) (153) Amortization of actuarial loss 39 36 31 8 5 5 47 41 36 Settlement charge — — — — 2 — — 2 — Net periodic pension (benefit) cost $ (11) $ 2 $ (17) $ 17 $ 15 $ 13 $ 6 $ 17 $ (4)
Schedule of Assumptions Used	The assumptions used to determine benefit obligations at December 31 are as follows: Qualified Plans Non-qualified Plans 2020 2019 2020 2019 Discount rate 2.48 % 3.35 % 2.07 % 3.05 % Rate of annual compensation increase 4.00 % 4.00 % 3.00 % 3.00 % The weighted-average assumptions used to determine net periodic pension (benefit) cost for the years ended December 31 are as follows: Qualified Plans Non-qualified Plans 2020 2019 2018 2020 2019 2018 Discount rate 3.37 % 4.39 % 3.70 % 3.00 % 4.18 % 3.49 % Expected long-term rate of return on plan assets 6.65 % 6.84 % 6.84 % N/A N/A N/A Rate of annual compensation increase 4.00 % 3.75 % 3.75 % 3.00 % 3.75 % 3.75 %
Presentation Of The Fair Value Of Regions' Qualified Defined-Benefit Pension Plans'	The following table presents the fair value of Regions’ qualified pension plans’ financial assets as of December 31: 2020 2019 Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Fair Value (In millions) Cash and cash equivalents $ 50 $ — $ — $ 50 $ 25 $ — $ — $ 25 Fixed income securities: U.S. Treasury securities $ 299 $ — $ — $ 299 $ 481 $ — $ — $ 481 Federal agency securities — 18 — 18 — 26 — 26 Corporate bonds — 490 — 490 — 111 — 111 Total fixed income securities $ 299 $ 508 $ — $ 807 $ 481 $ 137 $ — $ 618 Equity securities: Domestic $ 130 $ — $ — $ 130 $ 346 $ — $ — $ 346 International 164 — — 164 176 — — 176 Total equity securities $ 294 $ — $ — $ 294 $ 522 $ — $ — $ 522 International mutual funds $ 179 $ — $ — $ 179 $ 181 $ — $ — $ 181 Total assets in the fair value hierarchy $ 822 $ 508 $ — $ 1,330 $ 1,209 $ 137 $ — $ 1,346 Collective trust funds: Fixed income fund (1) $ 408 $ 440 Common stock fund (1) 217 178 International fund (1) 46 47 Total collective trust funds $ 671 $ 665 Real estate funds measured at NAV (1) $ 188 $ 187 Private equity funds measured at NAV (1) $ 280 $ 101 $ 2,469 $ 2,299 __________
Information About The Expected Cash Flows For The Qualified Pension Plan	Information about the expected cash flows for the qualified and non-qualified plans is as follows: Qualified Plans Non-qualified Plans (In millions) Expected Employer Contributions: 2021 $ — $ 33 Expected Benefit Payments: 2021 $ 138 $ 33 2022 138 31 2023 136 15 2024 138 11 2025 137 12 Next five years 673 57

Other Non-Interest Income and_2

Other Non-Interest Income and Expense (Tables)	12 Months Ended
	Dec. 31, 2020
Other Income and Expenses [Abstract]
Schedule Of Other Non-Interest Income and Expense	The following is a detail of other non-interest income from continuing operations for the years ended December 31: 2020 2019 2018 (In millions) Bank-owned life insurance 95 78 65 Investment services fee income $ 84 $ 79 $ 71 Commercial credit fee income 77 73 71 Valuation gain on equity investment (1) 50 — — Market value adjustments on employee benefit assets - defined benefit — 5 (6) Market value adjustments on employee benefit assets- other 12 11 (5) Other miscellaneous income 151 130 100 $ 469 $ 376 $ 296 ______ (1) In the third quarter of 2020, the equity investee executed an initial public offering. The Company was subject to a conventional post-issuance 180 day lock-up period, which prevented the sale of its position until January 2021. The Company sold its position in January 2021 and recognized an immaterial gain. The following is a detail of other non-interest expense from continuing operations for the years ended December 31: 2020 2019 2018 (In millions) Outside services $ 170 $ 189 $ 187 Marketing 94 97 92 Professional, legal and regulatory expenses 89 95 119 Credit/checkcard expenses 50 68 57 FDIC insurance assessments 48 48 85 Branch consolidation, property and equipment charges 31 25 11 Visa class B shares expense 24 14 10 Loss on early extinguishment of debt 22 16 — Provision (credit) for unfunded credit losses (1) — (6) (2) Other miscellaneous expenses 354 381 404 $ 882 $ 927 $ 963 ______ (1) Upon adoption of CECL on January 1, 2020, the provision for credit losses presented within net interest income after provision for credit losses is the sum of the provision for loan losses and the provision for unfunded credit commitments. Prior to the adoption of CECL, the provision for unfunded commitments was included in other non-interest expense.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Taxes [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense from continuing operations for the years ended December 31 were as follows: 2020 2019 2018 (In millions) Current income tax expense: Federal $ 312 $ 279 $ 175 State 66 62 29 Total current expense $ 378 $ 341 $ 204 Deferred income tax expense (benefit): Federal $ (142) $ 29 $ 130 State (16) 33 53 Total deferred expense (benefit) $ (158) $ 62 $ 183 Total income tax expense $ 220 $ 403 $ 387 __________ Note: The table above does not include total income tax expense from discontinued operations of zero, zero, and $80 million in 2020, 2019 and 2018, respectively. The deferred income tax expense reflected in discontinued operations was zero, zero and $43 million in 2020, 2019 and 2018, respectively.
Reconciliation Of Continuing Operations Effective Income Tax Rate Table	Income taxes from continuing operations for financial reporting purposes differs from the amount computed by applying the statutory federal income tax rate of 21 percent for the years ended December 31, 2020, 2019, and 2018, as shown in the following table: 2020 2019 2018 (Dollars in millions) Tax on income from continuing operations computed at statutory federal income tax rate $ 276 $ 417 $ 410 Increase (decrease) in taxes resulting from: State income tax, net of federal tax effect 39 75 65 Tax-exempt interest (34) (39) (37) Affordable housing investment amortization, net of tax benefits (excluding Tax Reform) (31) (34) (37) Other impacts of Tax Reform — — (37) Non-deductible expenses 22 19 28 Bank-owned life insurance (22) (19) (16) Impact of change in unrecognized tax benefits (20) 20 — Lease financing 5 5 11 Other, net (15) (41) — Income tax expense $ 220 $ 403 $ 387 Effective tax rate 16.8 % 20.3 % 19.8 % __________
Summary Of Significant Components Of Deferred Tax Assets And Liabilities	Significant components of the Company’s net deferred tax liability at December 31 are listed below: 2020 2019 (In millions) Deferred tax assets: Allowance for credit losses (1) $ 573 $ 231 Right of use liability 137 124 Federal and State net operating losses, net of federal tax effect 58 50 Unrealized losses included in shareholder's equity — 30 Accrued expenses 35 30 Federal tax credit carryforwards — 12 Other 13 16 Total deferred tax assets 816 493 Less: valuation allowance (31) (32) Total deferred tax assets less valuation allowance 785 461 Deferred tax liabilities: Unrealized gains included in shareholder's equity 444 — Lease financing 413 354 Right of use asset 128 115 Goodwill and intangibles 106 92 Employee benefits and deferred compensation 54 90 Fixed assets 54 42 Mortgage servicing rights 45 61 Other 46 35 Total deferred tax liabilities 1,290 789 Net deferred tax liability $ (505) $ (328) _______
Summary Of Details Of Tax Carryforwards Table	The following table provides details of the Company’s tax carryforwards at December 31, 2020, including the expiration dates, any related valuation allowance and the amount of pre-tax earnings necessary to fully realize each net deferred tax asset balance: Expiration Dates Deferred Tax Asset Balance (2) Valuation Net Deferred Tax Pre-Tax Earnings Necessary to Realize (1) (In millions) Net operating losses-federal 2037 $ 18 $ — $ 18 $ 87 Net operating losses-federal None 7 — 7 N/A Net operating losses-states 2021-2025 14 14 — — Net operating losses-states 2026-2032 13 12 1 8 Net operating losses-states 2033-2040 4 3 1 23 Net operating losses-states None 2 2 — N/A 58 31 27 ________ (1) N/A indicates that net operating losses with no expiration are not measured on a pre-tax basis.
Schedule of Unrecognized Tax Benefits Roll Forward	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: 2020 2019 2018 (In millions) Balance at beginning of year $ 37 $ 13 $ 27 Additions based on tax positions taken in a prior period 2 25 — Additions based on tax positions taken in the current period — — 11 Reductions based on tax positions taken in a prior period (25) — (13) Settlements (1) — (11) Expiration of statute of limitations (1) (1) (1) Balance at end of year $ 12 $ 37 $ 13

Derivative Financial Instrume_2

Derivative Financial Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2020
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 as of December 31: 2020 2019 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 $ 2,100 $ 77 $ — $ 2,900 $ 67 $ — Derivatives in cash flow hedging relationships: Interest rate swaps 16,000 1,181 — 17,250 338 83 Interest rate floors (2) 5,750 430 — 6,750 208 — Total derivatives in cash flow hedging relationships 21,750 1,611 — 24,000 546 83 Total derivatives designated as hedging instruments $ 23,850 $ 1,688 — $ 26,900 $ 613 $ 83 Derivatives not designated as hedging instruments: Interest rate swaps $ 76,764 $ 1,492 $ 1,464 $ 68,075 $ 659 $ 656 Interest rate options 13,806 90 28 11,347 27 9 Interest rate futures and forward commitments 4,270 11 26 27,324 10 11 Other contracts 9,924 68 80 10,276 48 58 Total derivatives not designated as hedging instruments $ 104,764 $ 1,661 $ 1,598 $ 117,022 $ 744 $ 734 Total derivatives $ 128,614 $ 3,349 $ 1,598 $ 143,922 $ 1,357 $ 817 Total gross derivative instruments, before netting $ 3,349 $ 1,598 $ 1,357 $ 817 Less: Netting adjustments (3) 2,428 1,545 1,022 770 Total gross derivative instruments, after netting (4) $ 921 $ 53 $ 335 $ 47 _________ (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) Estimated fair value includes premium of approximately $83 million as of December 31, 2020 and $108 million as of December 31, 2019 to be amortized over the remaining life. Approximately $15 million of the decrease since December 31, 2019 related to hedges that were terminated during the third quarter of 2020 and were not amortized into earnings as of the date of termination. (3) 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 Cash Flow Hedges Included in Accumulated Other Comprehensive Income Loss Table	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 2026. Twelve Months Ended December 31 2020 2019 (In millions) Unrealized gains on terminated hedges included in AOCI- January 1 $ 78 $ 68 Unrealized gains on terminated hedges arising during the period 55 23 Reclassification adjustments for amortization of unrealized (gains) into net income (12) (13) Unrealized gains on terminated hedges included in AOCI-December 31 $ 121 $ 78
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 affected for the years ended December 31: 2020 Interest Income Interest Expense Debt securities Loans, including fees Long-term borrowings (In millions) Total amounts presented in the consolidated statements of income $ 582 $ 3,610 $ 178 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ — $ — $ 37 Recognized on derivatives — — 52 Recognized on hedged items — — (51) Net income recognized on fair value hedges $ — $ — $ 38 Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ — $ 260 $ — Income (expense) recognized on cash flow hedges (2) $ — $ 260 $ — 2019 Interest Income Interest Expense Debt securities Loans, including fees Long-term borrowings (In millions) Total amounts presented in the consolidated statements of income $ 643 $ 3,866 $ 351 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ — $ — $ (14) Recognized on derivatives (2) — 92 Recognized on hedged items 2 — (92) Net income recognized on fair value hedges $ — $ — $ (14) Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ — $ (24) $ — Income (expense) recognized on cash flow hedges (2) $ — $ (24) $ — 2018 Interest Income Interest Expense Debt securities Loans, including fees Long-term borrowings (In millions) Total amounts presented in the consolidated statements of income $ 625 $ 3,613 $ 322 Gains/(losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $ (1) $ — $ (15) Recognized on derivatives 4 — 1 Recognized on hedged items (4) — (1) Net income recognized on fair value hedges $ (1) $ — $ (15) Gains/(losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ — $ 12 $ — Income (expense) recognized on cash flow hedges (2) $ — $ 12 $ — ____ (1) See Note 15 for gain or (loss) recognized for cash flow hedges in AOCI. (2) Pre-tax
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 as of December 31: 2020 2019 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) (In millions) Long-term borrowings (2,171) (64) (2,954) (49)
Schedule Of Gains (Losses) Recognized In Income 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 years ended December 31: Derivatives Not Designated as Hedging Instruments 2020 2019 2018 (In millions) Capital markets income: Interest rate swaps $ 21 $ 13 $ 19 Interest rate options 36 23 28 Interest rate futures and forward commitments 14 10 3 Other contracts 1 (1) 5 Total capital markets income 72 45 55 Mortgage income: Interest rate swaps 83 68 (12) Interest rate options 30 (1) — Interest rate futures and forward commitments (2) 5 (8) Total mortgage income 111 72 (20) $ 183 $ 117 $ 35

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
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 as of December 31: 2020 2019 Level 1 Level 2 Level 3 (1) Total Level 1 Level 2 Level 3 (1) Total (In millions) Recurring fair value measurements Debt securities available for sale: U.S. Treasury securities $ 183 $ — $ — $ 183 $ 182 $ — $ — $ 182 Federal agency securities — 105 — 105 — 43 — 43 Mortgage-backed securities (MBS): Residential agency — 19,076 — 19,076 — 15,516 — 15,516 Residential non-agency — — 1 1 — — 1 1 Commercial agency — 5,999 — 5,999 — 4,766 — 4,766 Commercial non-agency — 586 — 586 — 647 — 647 Corporate and other debt securities — 1,200 4 1,204 — 1,450 1 1,451 Total debt securities available for sale $ 183 $ 26,966 $ 5 $ 27,154 $ 182 $ 22,422 $ 2 $ 22,606 Loans held for sale $ — $ 1,446 $ — $ 1,446 $ — $ 436 $ 3 $ 439 Marketable equity securities $ 388 $ — $ — $ 388 $ 450 $ — $ — $ 450 Residential mortgage servicing rights $ — $ — $ 296 $ 296 $ — $ — $ 345 $ 345 Derivative assets (2) : Interest rate swaps $ — $ 2,750 $ — $ 2,750 $ — $ 1,064 $ — $ 1,064 Interest rate options — 477 43 520 — 227 8 235 Interest rate futures and forward commitments — 11 — 11 — 4 6 10 Other contracts 2 65 1 68 — 47 1 48 Total derivative assets $ 2 $ 3,303 $ 44 $ 3,349 $ — $ 1,342 $ 15 $ 1,357 Equity investments $ — $ 74 $ — $ 74 $ — $ — $ — $ — Derivative liabilities (2) : Interest rate swaps $ — $ 1,464 $ — $ 1,464 $ — $ 739 $ — $ 739 Interest rate options — 28 — 28 — 9 — 9 Interest rate futures and forward commitments — 26 — 26 — 11 — 11 Other contracts 2 72 6 80 — 53 5 58 Total derivative liabilities $ 2 $ 1,590 $ 6 $ 1,598 $ — $ 812 $ 5 $ 817 Non-recurring fair value measurements Loans held for sale $ — $ — $ 4 $ 4 $ — $ — $ 14 $ 14 Equity investments without a readily determinable fair value — — 12 12 — — 32 32 Foreclosed property and other real estate — — 5 5 — — 42 42 _________ (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.
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 years ended December 31, 2020, 2019 and 2018, respectively. Residential mortgage servicing rights For the Years Ended December 31 2020 2019 2018 (In millions) Carrying value, beginning of period $ 345 $ 418 $ 336 Total realized/unrealized gains (losses) included in earnings (1) (157) (115) (29) Purchases 108 42 111 Carrying value, end of period $ 296 $ 345 $ 418 _______ (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 for the years ended December 31: 2020 2019 (In millions) Loans held for sale $ (8) $ (12) Equity investments without a readily determinable fair value 2 1 Foreclosed property and other real estate (10) (30)
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 December 31, 2020, 2019 and 2018. 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 December 31, 2020, 2019 and 2018 are included. Following the tables are descriptions of the valuation techniques and the sensitivity of the techniques to changes in the significant unobservable inputs. December 31, 2020 Level 3 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%) December 31, 2019 Level 3 Valuation Unobservable Quantitative Range of (Dollars in millions) Recurring fair value measurements: Residential mortgage servicing rights (1) $345 Discounted cash flow Weighted-average CPR (%) 7.4% - 26.1% (12.0%) OAS (%) 5.2% - 10.2% (6.2%) December 31, 2018 Level 3 Valuation Unobservable Quantitative Range of (Dollars in millions) Recurring fair value measurements: Residential mortgage servicing rights (1) $418 Discounted cash flow Weighted-average CPR (%) 4.4% -42.6% (9.0%) OAS (%) 5.7% - 15.0% (7.6%) _________ (1) See Note 7 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 at December 31: 2020 2019 Aggregate Aggregate Aggregate Fair Aggregate Aggregate Aggregate Fair (In millions) Mortgage loans held for sale, at fair value $ 1,439 $ 1,362 $ 77 $ 439 $ 425 $ 14 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 for the years presented. 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. 2020 2019 (In millions) Net gains (losses) resulting from changes in fair value of mortgage loans held for sale $ 63 $ 4
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 December 31, 2020 are as follows: 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. 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, 2019 are as follows: 2019 Carrying Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 4,114 $ 4,114 $ 4,114 $ — $ — Debt securities held to maturity 1,332 1,372 — 1,372 — Debt securities available for sale 22,606 22,606 182 22,422 2 Loans held for sale 637 637 — 620 17 Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 80,841 80,799 — — 80,799 Other earning assets (4) 1,221 1,221 450 771 — Derivative assets 1,357 1,357 — 1,342 15 Financial liabilities: Derivative liabilities 817 817 — 812 5 Deposits 97,475 97,516 — 97,516 — Short-term borrowings 2,050 2,050 — 2,050 — Long-term borrowings 7,879 8,275 — 7,442 833 Loan commitments and letters of credit 67 67 — — 67 _________ (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 discount on the loan portfolio's net carrying amount at December 31, 2019 was $42 million or 0.1 percent. (3) Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.3 billion at December 31, 2019. (4) Excluded from this table is the operating lease carrying amount of $297 million at December 31, 2019.

Business Segment Information (T

Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule Of Financial Information By Reportable Segment	The following tables present financial information for each reportable segment for the year ended December 31: 2020 Corporate Bank Consumer Wealth Other Continuing Discontinued Consolidated (In millions) Net interest income (loss) $ 1,783 $ 2,274 $ 156 $ (319) $ 3,894 $ — $ 3,894 Provision (credit) for credit losses (1) 299 320 14 697 1,330 — 1,330 Non-interest income 656 1,266 343 128 2,393 — 2,393 Non-interest expense 1,026 2,046 346 225 3,643 — 3,643 Income (loss) before income taxes 1,114 1,174 139 (1,113) 1,314 — 1,314 Income tax expense (benefit) 279 294 34 (387) 220 — 220 Net income (loss) $ 835 $ 880 $ 105 $ (726) $ 1,094 $ — $ 1,094 Average assets $ 61,237 $ 34,516 $ 2,021 $ 40,321 $ 138,095 $ — $ 138,095 2019 Corporate Bank Consumer Wealth Other Continuing Discontinued Consolidated (In millions) Net interest income (loss) $ 1,446 $ 2,336 $ 180 $ (217) $ 3,745 $ — $ 3,745 Provision (credit) for credit losses (1) 205 340 16 (174) 387 — 387 Non-interest income 538 1,214 330 34 2,116 — 2,116 Non-interest expense 934 2,107 343 105 3,489 — 3,489 Income (loss) before income taxes 845 1,103 151 (114) 1,985 — 1,985 Income tax expense (benefit) 211 276 37 (121) 403 — 403 Net income (loss) $ 634 $ 827 $ 114 $ 7 $ 1,582 $ — $ 1,582 Average assets $ 53,867 $ 35,045 $ 2,183 $ 34,015 $ 125,110 $ — $ 125,110 2018 Corporate Bank Consumer Wealth Other Continuing Discontinued Consolidated (In millions) Net interest income (loss) $ 1,384 $ 2,216 $ 194 $ (59) $ 3,735 $ 1 $ 3,736 Provision (credit) for credit losses (1) 191 317 16 (295) 229 — 229 Non-interest income 545 1,146 316 12 2,019 349 2,368 Non-interest expense 909 2,066 334 261 3,570 79 3,649 Income (loss) before income taxes 829 979 160 (13) 1,955 271 2,226 Income tax expense (benefit) 207 245 40 (105) 387 80 467 Net income (loss) $ 622 $ 734 $ 120 $ 92 $ 1,568 $ 191 $ 1,759 Average assets $ 51,530 $ 35,066 $ 2,287 $ 34,415 $ 123,298 $ 82 $ 123,380 _____	[1]
[1]	Upon adoption of CECL on January 1, 2020, the provision for credit losses presented within net interest income after provision for credit losses is the sum of the provision for loan losses and the provision for unfunded credit commitments. Prior to the adoption of CECL, the provision for unfunded commitments was included in other non-interest expense.

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Credit Risk Of Off- Balance Sheet Financial Instruments By Contractual Amounts	Credit risk associated with these instruments as of December 31 is represented by the contractual amounts indicated in the following table: 2020 2019 (In millions) Unused commitments to extend credit $ 56,644 $ 52,976 Standby letters of credit 1,742 1,521 Commercial letters of credit 132 59 Liabilities associated with standby letters of credit 25 22 Assets associated with standby letters of credit 25 23 Reserve for unfunded credit commitments 126 45

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue Recognition [Abstract]
Disaggregation of Revenue	The following tables present total non-interest income disaggregated by major product category for each reportable segment for the period indicated: Year Ended December 31, 2020 Corporate Bank Consumer Wealth Other Segment Revenue Other (2) Continuing Discontinued (In millions) Service charges on deposit accounts $ 152 $ 459 $ 3 $ 2 $ 5 $ 621 $ — Card and ATM fees 43 385 — (1) 11 438 — Investment management and trust fee income — — 253 — — 253 — Capital markets income 126 — — — 149 275 — Mortgage income — — — — 333 333 — Investment services fee income — — 84 — — 84 — Commercial credit fee income — — — — 77 77 — Bank-owned life insurance — — — — 95 95 — Securities gains (losses), net — — — — 4 4 — Market value adjustments on employee benefit assets - other — — — — 12 12 — Valuation gain on equity investment (1) — — — — 50 50 — Other miscellaneous income 33 49 3 2 64 151 — $ 354 $ 893 $ 343 $ 3 $ 800 $ 2,393 $ — Year Ended December 31, 2019 Corporate Bank Consumer Wealth Other Segment Revenue Other (2) Continuing Discontinued (In millions) Service charges on deposit accounts $ 154 $ 565 $ 3 $ — $ 7 $ 729 $ — Card and ATM fees 54 422 1 — (22) 455 — Investment management and trust fee income — — 243 — — 243 — Capital markets income 69 — — — 109 178 — Mortgage income — — — — 163 163 — Investment services fee income — — 79 — — 79 — Commercial credit fee income — — — — 73 73 — Bank-owned life insurance — — — — 78 78 — Securities gains (losses), net — — — — (28) (28) — Market value adjustments on employee benefit assets - defined benefit — — — — 5 5 — Market value adjustments on employee benefit assets - other — — — — 11 11 — Other miscellaneous income 18 58 5 (2) 51 130 — $ 295 $ 1,045 $ 331 $ (2) $ 447 $ 2,116 $ — Year Ended December 31, 2018 Corporate Bank Consumer Wealth Other Segment Revenue Other (2) Continuing Discontinued (In millions) Service charges on deposit accounts $ 145 $ 554 $ 3 $ — $ 8 $ 710 $ — Card and ATM fees 52 404 1 (1) (18) 438 — Investment management and trust fee income — — 235 — — 235 — Capital markets income 76 — — — 126 202 — Mortgage income — — — — 137 137 — Investment services fee income — — 71 — — 71 — Commercial credit fee income — — — — 71 71 — Bank-owned life insurance — — — — 65 65 — Securities gains (losses), net — — — — 1 1 (1) Market value adjustments on employee benefit assets - defined benefit — — — — (6) (6) — Market value adjustments on employee benefit assets - other — — — — (5) (5) — Insurance commissions and fees — — 1 3 — 4 69 Gain on sale of business (2) — — — — — — 281 Other miscellaneous income 13 42 3 (1) 39 96 — $ 286 $ 1,000 $ 314 $ 1 $ 418 $ 2,019 $ 349 _________ (1) In the third quarter of 2020, the equity investee executed an initial public offering. The Company was subject to a conventional post-issuance 180 day lock-up period, which prevented the sale of its position until January 2021. The Company sold its position in January 2021 and recognized an immaterial gain. (2) This revenue is not impacted by the accounting guidance adopted in 2018 and continues to be recognized when earned in accordance with the Company's prior revenue recognition policy.

Parent Company Only Financial_2

Parent Company Only Financial Statements (Tables) - Parent Company [Member]	12 Months Ended
	Dec. 31, 2020
Schedule of Condensed Balance Sheet	Balance Sheets December 31 2020 2019 (In millions) Assets Interest-bearing deposits in other banks $ 1,526 $ 1,935 Loans to subsidiaries 20 20 Debt securities available for sale 22 21 Premises and equipment, net 38 41 Investments in subsidiaries: Banks 18,872 16,939 Non-banks 250 207 19,122 17,146 Other assets 313 295 Total assets $ 21,041 $ 19,458 Liabilities and Shareholders’ Equity Long-term borrowings $ 2,718 $ 2,950 Other liabilities 212 213 Total liabilities 2,930 3,163 Shareholders’ equity: Preferred stock 1,656 1,310 Common stock 10 10 Additional paid-in capital 12,731 12,685 Retained earnings 3,770 3,751 Treasury stock, at cost (1,371) (1,371) Accumulated other comprehensive income (loss), net 1,315 (90) Total shareholders’ equity 18,111 16,295 Total liabilities and shareholders’ equity $ 21,041 $ 19,458
Schedule of Condensed Income Statement	Statements of Income Year Ended December 31 2020 2019 2018 (In millions) Income: Dividends received from subsidiaries $ 280 $ 1,675 $ 2,190 Interest from subsidiaries 8 4 3 Other 53 7 7 341 1,686 2,200 Expenses: Salaries and employee benefits 56 54 52 Interest 93 153 123 Furniture and equipment expense 4 5 4 Other 79 84 76 232 296 255 Income before income taxes and equity in undistributed earnings of subsidiaries 109 1,390 1,945 Income tax benefit (36) (68) (64) Income from continuing operations 145 1,458 2,009 Discontinued operations: Income (loss) from discontinued operations before income taxes — — 271 Income tax expense — — 80 Income (loss) from discontinued operations, net of tax — — 191 Income before equity in undistributed earnings of subsidiaries and preferred dividends 145 1,458 2,200 Equity in undistributed earnings of subsidiaries: Banks 905 110 (454) Non-banks 44 14 13 949 124 (441) Net income 1,094 1,582 1,759 Preferred stock dividends (103) (79) (64) Net income available to common shareholders $ 991 $ 1,503 $ 1,695
Schedule of Condensed Cash Flow Statement	Statements of Cash Flows Year Ended December 31 2020 2019 2018 (In millions) Operating activities: Net income $ 1,094 $ 1,582 $ 1,759 Adjustments to reconcile net cash from operating activities: Equity in undistributed earnings of subsidiaries (949) (124) 441 Provision for deferred income taxes 29 20 8 Depreciation, amortization and accretion, net 3 4 3 Loss on sale of assets 1 — — Loss on early extinguishment of debt 14 16 — (Gain) on sale of business — — (281) Net change in operating assets and liabilities: Other assets 3 18 (35) Other liabilities — (7) (8) Other 44 102 23 Net cash from operating activities 239 1,611 1,910 Investing activities: (Investment in) / repayment of investment in subsidiaries — (18) 146 Proceeds from sales and maturities of debt securities available for sale 4 5 8 Purchases of debt securities available for sale (4) (6) (10) Proceeds from disposition of business, net of cash transferred — — 357 Net cash from investing activities — (19) 501 Financing activities: Net change in short-term borrowings — — (101) Proceeds from long-term borrowings 748 500 500 Payments on long-term borrowings (1,039) (751) — Cash dividends on common stock (595) (577) (452) Cash dividends on preferred stock (103) (79) (64) Net proceeds from issuance of preferred stock 346 490 — Repurchase of common stock — (1,101) (2,122) Other (5) (2) (2) Net cash from financing activities (648) (1,520) (2,241) Net change in cash and cash equivalents (409) 72 170 Cash and cash equivalents at beginning of year 1,935 1,863 1,693 Cash and cash equivalents at end of year $ 1,526 $ 1,935 $ 1,863

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Supplemental Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 408	$ 851	$ 581
Income Taxes Paid, Net	132	85	57
Real Estate Owned, Transfer to Real Estate Owned	31	63	54
Transfer of Portfolio Loans and Leases to Held-for-sale	275	66	313
Transfer of Loans Held-for-sale to Portfolio Loans	1	3	14
Properties Transferred To Held For Sale	$ 33	$ 62	$ 21

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Modifications [Line Items]
Retained earnings		$ 3,770,000,000	$ 3,751,000,000
Commercial And Investor Real Estate Loans Subject To Charge Offs Maximum		$ 250,000
Days For Commercial and Investor Real Estate Loans To Be Evaluated As Potential Charge Off		180 days
Days For Consumer First Lien Postion Loans To Be Evaluated As Potential Charge Off		180 days
Days For Home Equity Loans In Second Lien Position To Be Evaluated As Potential Charge Off		120 days
Days For Consumer Close-Ended Loans To Be Evaluated As Potential Charge Off		120 days
Days for Consumer Loans in an Open-Ended Position to be Evaluated for Potential Charge Off		180 days
Days for Credit Cards to be Evaluated for Potential Charge Off		180 days
Provision for credit losses (1)		$ 878,000,000
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Modifications [Line Items]
Retained earnings		377,000,000
CECL [Member]
Financing Receivable, Modifications [Line Items]
Provision for credit losses (1)	$ 501,000,000
CumulativeEffectPeriodOfAdoptionAdjustmentAttributableToTheAllowance [Member]
Financing Receivable, Modifications [Line Items]
Retained earnings		375,000,000
CumulativeEffectPeriodOfAdoptionAdjustmentAttributableToOtherFinancialAssets [Member]
Financing Receivable, Modifications [Line Items]
Retained earnings		2,000,000
Retained Earnings (Deficit) [Member] | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Modifications [Line Items]
Retained earnings		$ (377,000,000)	$ 2,000,000	$ (2,000,000)
Retained Earnings (Deficit) [Member] | CECL Day 1 Adjustment to the Allowance [Member]
Financing Receivable, Modifications [Line Items]
Retained earnings	375,000,000
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle	$ 126,000,000
Minimum [Member]
Financing Receivable, Modifications [Line Items]
Lessee, Operating Lease, Term of Contract		1 year
Maximum [Member]
Financing Receivable, Modifications [Line Items]
Lessee, Operating Lease, Term of Contract		20 years
Leasehold improvements | Minimum [Member]
Financing Receivable, Modifications [Line Items]
Property, Plant and Equipment, Useful Life		7 years
Leasehold improvements | Maximum [Member]
Financing Receivable, Modifications [Line Items]
Property, Plant and Equipment, Useful Life		40 years
Furniture and equipment | Minimum [Member]
Financing Receivable, Modifications [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Furniture and equipment | Maximum [Member]
Financing Receivable, Modifications [Line Items]
Property, Plant and Equipment, Useful Life		10 years

Variable Interest Entities Affo

Variable Interest Entities Affordable Housing Tax Credit Investments (Details) - Low Income Housing Tax Credit Investments [Member] - Variable Interest Entity, Not Primary Beneficiary [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Affordable housing tax credit investments included in other assets	$ 975	$ 932
Unfunded affordable housing tax credit commitments included in other liabilities	249	213
Loans and letters of credit commitments	243	265
Funded portion of loans and letters of credit commitments	130	157
Tax credits and other tax benefits recognized	164	165	$ 174
Tax credit amortization expense included in provision for income taxes	$ 133	$ 131	$ 137

Variable Interest Entities (Sch

Variable Interest Entities (Schedule of Equity Method Investments) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Total assets	$ 147,389	$ 126,240
Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Gross equity method investments	186	176
Unfunded equity method commitments	57	72
Total assets	$ 129	$ 104

Discontinued Operations (Detail

Discontinued Operations (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net interest income	$ 3,894	$ 3,745	$ 3,735
Non-interest income:
Gain (Loss) on Disposition of Business	0	0	(281)
Total non-interest Income	2,393	2,116	2,019
Non-interest expense:
Salaries and employee benefits	2,100	1,916	1,947
Net occupancy expense	313	321	335
Furniture and equipment expense	348	325	325
Other	882	927	963
Non-interest expense	3,643	3,489	3,570
Income from discontinued operations before income taxes	0	0	271
Income tax expense	0	0	80
Income from discontinued operations, net of tax	$ 0	$ 0	$ 191
Earnings per common share from discontinued operations:
Basic	$ 0	$ 0	$ 0.18
Diluted	$ 0	$ 0	$ 0.17
Discontinued Operations [Member]
Non-interest expense:
Income from discontinued operations before income taxes	$ 0	$ 0	$ 271
Income tax expense	0	0	80
Income from discontinued operations, net of tax	$ 0	$ 0	$ 191
Earnings per common share from discontinued operations:
Basic	$ 0	$ 0	$ 0.18
Diluted	$ 0	$ 0	$ 0.17
Regions Insurance Group [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Interest Income			$ 1
Disposal Group, Including Discontinued Operation, Interest Expense			0
Net interest income			1
Non-interest income:
Gain (Loss) on Sale of Securities, Net (Excluding Trading Securities)			(1)
Insurance Commissions and Fees			69
Gain (Loss) on Disposition of Business			281
Other Non-Interest Income			0
Total non-interest Income			349
Non-interest expense:
Salaries and employee benefits			49
Net occupancy expense			3
Furniture and equipment expense			2
Other			16
Non-interest expense			70
Income from discontinued operations before income taxes			280
Income tax expense			84
Income from discontinued operations, net of tax			196
Earnings per common share from discontinued operations:
Gain (Loss) on Disposition of Business, net of tax			$ 196

Debt Securities (Schedule Of Am

Debt 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		Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		$ 26,092	$ 22,332
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	[1]	1,072	344
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	[1]	(10)	(70)
Available-for-sale debt securities, net carrying value		27,154	22,606
Debt securities available for sale		27,154	22,606
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities held to maturity, amortized cost		1,143	1,361
Held To Maturity Debt Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Debt Securities Gross Unrealized Losses	[1]	(21)	(29)
Debt Securities held to maturity		1,122	1,332
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain		93	42
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss		0	(2)
Debt Securities held to maturity, estimated fair value		1,215	1,372
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		178	180
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	[1]	5	2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	[1]	0	0
Available-for-sale debt securities, net carrying value		183	182
Debt securities available for sale		183	182
Federal agency securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		102	42
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	[1]	3	1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	[1]	0	0
Available-for-sale debt securities, net carrying value		105	43
Debt securities available for sale		105	43
Residential Agency [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		18,455	15,336
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	[1]	625	218
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	[1]	(4)	(38)
Available-for-sale debt securities, net carrying value		19,076	15,516
Debt securities available for sale		19,076	15,516
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities held to maturity, amortized cost		554	736
Held To Maturity Debt Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Debt Securities Gross Unrealized Losses	[1]	(19)	(26)
Debt Securities held to maturity		535	710
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain		34	22
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss		0	0
Debt Securities held to maturity, estimated fair value		569	732
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	[1]	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	[1]	0	0
Available-for-sale debt securities, net carrying value		1	1
Debt securities available for sale		1	1
Commercial Agency [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		5,659	4,720
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	[1]	346	77
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	[1]	(6)	(31)
Available-for-sale debt securities, net carrying value		5,999	4,766
Debt securities available for sale		5,999	4,766
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities held to maturity, amortized cost		589	625
Held To Maturity Debt Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Debt Securities Gross Unrealized Losses	[1]	(2)	(3)
Debt Securities held to maturity		587	622
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain		59	20
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss		0	(2)
Debt Securities held to maturity, estimated fair value		646	640
Commercial Non Agency [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		571	639
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	[1]	15	8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	[1]	0	0
Available-for-sale debt securities, net carrying value		586	647
Debt securities available for sale		586	647
Corporate and other debt securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		1,126	1,414
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	[1]	78	38
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	[1]	0	(1)
Available-for-sale debt securities, net carrying value		1,204	1,451
Debt securities available for sale		$ 1,204	$ 1,451
[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 (Schedule Of Co

Debt 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	Dec. 31, 2020	Dec. 31, 2019
Debt Securities held to maturity, amortized cost	$ 1,143	$ 1,361
Debt Securities held to maturity, estimated fair value	1,215	1,372
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	200
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	202
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	828
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	873
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	267
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	299
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	111
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	118
Debt Securities, Available-for-sale, Amortized Cost	26,092	22,332
Debt securities available for sale	27,154	22,606
Residential Agency [Member]
Debt Securities held to maturity, amortized cost	554	736
Debt Securities held to maturity, estimated fair value	569	732
Debt Securities, Available-for-sale, Amortized Cost	18,455	15,336
Debt securities available for sale	19,076	15,516
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	589	625
Debt Securities held to maturity, estimated fair value	646	640
Debt Securities, Available-for-sale, Amortized Cost	5,659	4,720
Debt securities available for sale	5,999	4,766
Commercial Non Agency [Member]
Debt Securities, Available-for-sale, Amortized Cost	571	639
Debt securities available for sale	$ 586	$ 647

Debt Securities (Schedule Of Gr

Debt Securities (Schedule Of Gross Unrealized Losses And Estimated Fair Value Of Securities Available For Sale) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Unrealized Loss And Fair Value On Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value		$ 82
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value		628
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(10)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Estimated Fair Value		710
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss		(10)
Available For Sale Securities, Continuous Unrealized Loss Position, Less Than Twelve Months, Estimated Fair Value	$ 1,733	3,870
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(10)	(42)
Available For Sale Securities, Continuous Unrealized Loss Position, Twelve Months or More, Estimated Fair Value	101	2,610
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(28)
Available For Sale Securities, Continuous Unrealized Loss, Estimated Fair Value	1,834	6,480
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(10)	(70)
Residential Agency [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value		82
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value		501
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(5)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Estimated Fair Value		583
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss		(5)
Available For Sale Securities, Continuous Unrealized Loss Position, Less Than Twelve Months, Estimated Fair Value	914	2,402
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(4)	(11)
Available For Sale Securities, Continuous Unrealized Loss Position, Twelve Months or More, Estimated Fair Value	101	2,505
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(27)
Available For Sale Securities, Continuous Unrealized Loss, Estimated Fair Value	1,015	4,907
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(4)	(38)
Commercial Agency [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value		0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value		127
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(5)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Estimated Fair Value		127
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss		(5)
Available For Sale Securities, Continuous Unrealized Loss Position, Less Than Twelve Months, Estimated Fair Value	819	1,449
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(6)	(31)
Available For Sale Securities, Continuous Unrealized Loss Position, Twelve Months or More, Estimated Fair Value	0	73
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available For Sale Securities, Continuous Unrealized Loss, Estimated Fair Value	819	1,522
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (6)	(31)
Corporate and other debt securities [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Available For Sale Securities, Continuous Unrealized Loss Position, Less Than Twelve Months, Estimated Fair Value		19
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0
Available For Sale Securities, Continuous Unrealized Loss Position, Twelve Months or More, Estimated Fair Value		32
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(1)
Available For Sale Securities, Continuous Unrealized Loss, Estimated Fair Value		51
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (1)

Debt Securities (Schedule Of _2

Debt Securities (Schedule Of Gross Gains And Gross Losses On Available For Sale Securities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 5	$ 16	$ 4
Gross realized losses	(1)	(43)	(1)
Other than Temporary Impairment	0	(1)	(2)
Available-for-sale Securities, Gross Realized Gain (Loss)	$ 4	$ (28)	$ 1

Debt Securities (Narrative) (De

Debt Securities (Narrative) (Details) $ in Millions	Dec. 31, 2020USD ($)security	Dec. 31, 2019USD ($)security
Debt Securities, Available-for-sale [Line Items]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value	$ 10,300	$ 8,300
Number of individual positions in unrealized loss position | security	129	500
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 (Schedule Of Loan Portfol

Loans (Schedule Of Loan Portfolio, Net Of Unearned Income) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 85,266	$ 82,963	$ 83,152
Loans and Leases Receivable, Deferred Income	678	234
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	42,870	39,971
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,405	5,537
Commercial Real Estate Construction - Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	300	331
Commercial Investor Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,394	4,936
Commercial Investor Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,869	1,621
Residential First Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	16,575	14,485
Home Equity Lines of Credit[Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,539	5,300
Home Equity Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,713	3,084
Indirect-vehicles [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	934	1,812
Indirect-other consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,431	3,249
Consumer Credit Card Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,213	1,387
Other Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,023	1,250
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	48,575	45,839	45,215
Total Investor Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	7,263	6,557	6,436
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 29,428	$ 30,567	$ 31,501

Loans (Narrative) (Details)

Loans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased loans	$ 1,600	$ 1,600
Federal Reserve Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Pledged for Federal Reserve Bank Debt	17,600
Federal Home Loan Bank (FHLB) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Pledged for Federal Home Loan Bank Debt	$ 20,800

Allowance For Credit Losses (An

Allowance For Credit Losses (Analysis Of The Allowance For Credit Losses By Portfolio Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	$ 869	$ 840	$ 934
Cumulative change in accounting guidance	438
Allowance for loan losses, beginning of period as adjusted for CECL	1,307
Provision (credit) for loan losses	1,312	387	229
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	60
Loan Losses:
Charge-offs	(613)	(443)	(433)
Recoveries	101	85	110
Net loan losses	(512)	(358)	(323)
Total allowance for loan losses	2,167	869	840
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve for unfunded credit commitments, beginning of year	45	51	53
Provision (credit) for unfunded credit losses	18	(6)	(2)
Reserve for unfunded credit commitments, end of year	126	45	51
Allowance for Credit Losses, end of period	2,293	914	891
UnfundedcreditcommitmentsChangeinAccountingGuidance	63
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL	108
Portion of ending allowance for loan losses:
Individually evaluated for impairment		153	132
Collectively evaluated for impairment		716	708
Total allowance for loan losses	2,167	869	840
Portion of loan portfolio ending balance:
Individually evaluated for impairment		952	934
Collectively evaluated for impairment		82,011	82,218
Loans, net of unearned income	85,266	82,963	83,152
Commercial Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	537	520	591
Cumulative change in accounting guidance	(3)
Allowance for loan losses, beginning of period as adjusted for CECL	534
Provision (credit) for loan losses	927	138	32
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	60
Loan Losses:
Charge-offs	(368)	(150)	(148)
Recoveries	43	29	45
Net loan losses	(325)	(121)	(103)
Total allowance for loan losses	1,196	537	520
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve for unfunded credit commitments, beginning of year	41	47	49
Provision (credit) for unfunded credit losses	20	(6)	(2)
Reserve for unfunded credit commitments, end of year	97	41	47
Allowance for Credit Losses, end of period	1,293	578	567
UnfundedcreditcommitmentsChangeinAccountingGuidance	36
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL	77
Portion of ending allowance for loan losses:
Individually evaluated for impairment		120	104
Collectively evaluated for impairment		417	416
Total allowance for loan losses	1,196	537	520
Portion of loan portfolio ending balance:
Individually evaluated for impairment		537	490
Collectively evaluated for impairment		45,302	44,725
Loans, net of unearned income	48,575	45,839	45,215
Total Investor Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	45	58	64
Cumulative change in accounting guidance	7
Allowance for loan losses, beginning of period as adjusted for CECL	52
Provision (credit) for loan losses	129	(16)	(5)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0
Loan Losses:
Charge-offs	(1)	(1)	(9)
Recoveries	3	4	8
Net loan losses	2	3	(1)
Total allowance for loan losses	183	45	58
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve for unfunded credit commitments, beginning of year	4	4	4
Provision (credit) for unfunded credit losses	(3)	0	0
Reserve for unfunded credit commitments, end of year	14	4	4
Allowance for Credit Losses, end of period	197	49	62
UnfundedcreditcommitmentsChangeinAccountingGuidance	13
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL	17
Portion of ending allowance for loan losses:
Individually evaluated for impairment		4	2
Collectively evaluated for impairment		41	56
Total allowance for loan losses	183	45	58
Portion of loan portfolio ending balance:
Individually evaluated for impairment		34	25
Collectively evaluated for impairment		6,523	6,411
Loans, net of unearned income	7,263	6,557	6,436
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	287	262	279
Cumulative change in accounting guidance	434
Allowance for loan losses, beginning of period as adjusted for CECL	721
Provision (credit) for loan losses	256	265	202
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0
Loan Losses:
Charge-offs	(244)	(292)	(276)
Recoveries	55	52	57
Net loan losses	(189)	(240)	(219)
Total allowance for loan losses	788	287	262
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve for unfunded credit commitments, beginning of year	0	0	0
Provision (credit) for unfunded credit losses	1	0	0
Reserve for unfunded credit commitments, end of year	15	0	0
Allowance for Credit Losses, end of period	803	287	262
UnfundedcreditcommitmentsChangeinAccountingGuidance	14
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL	14
Portion of ending allowance for loan losses:
Individually evaluated for impairment		29	26
Collectively evaluated for impairment		258	236
Total allowance for loan losses	788	287	262
Portion of loan portfolio ending balance:
Individually evaluated for impairment		381	419
Collectively evaluated for impairment		30,186	31,082
Loans, net of unearned income	$ 29,428	$ 30,567	$ 31,501

Loans and the Allowance for Cre

Loans and the Allowance for Credit Losses (Financing Receivables Credit Quality Indicators) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	$ 23,532
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,322
Financing Receivable, Originated Two Years before Latest Fiscal Year	9,190
Financing Receivable, Originated Three Years before Latest Fiscal Year	5,618
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,912
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8,685
Financing Receivable, Revolving	20,657
Financing Receivable, Revolving Converted to Amortizing	76
Financing Receivable, Unallocated	(274)
Loans, net of unearned income	85,266	$ 82,963	$ 83,152
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	12,476
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,474
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,101
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,572
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,214
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,564
Financing Receivable, Revolving	13,508
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(39)
Loans, net of unearned income	42,870	39,971
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,414
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	974
Financing Receivable, Originated Two Years before Latest Fiscal Year	971
Financing Receivable, Originated Three Years before Latest Fiscal Year	606
Financing Receivable, Originated Four Years before Latest Fiscal Year	421
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	874
Financing Receivable, Revolving	148
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(3)
Loans, net of unearned income	5,405	5,537
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	62
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	78
Financing Receivable, Originated Two Years before Latest Fiscal Year	40
Financing Receivable, Originated Three Years before Latest Fiscal Year	30
Financing Receivable, Originated Four Years before Latest Fiscal Year	30
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	51
Financing Receivable, Revolving	9
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	300	331
Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,737
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,478
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,271
Financing Receivable, Originated Three Years before Latest Fiscal Year	267
Financing Receivable, Originated Four Years before Latest Fiscal Year	67
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	179
Financing Receivable, Revolving	400
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(5)
Loans, net of unearned income	5,394	4,936
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	255
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	638
Financing Receivable, Originated Two Years before Latest Fiscal Year	297
Financing Receivable, Originated Three Years before Latest Fiscal Year	1
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1
Financing Receivable, Revolving	688
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(11)
Loans, net of unearned income	1,869	1,621
Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	6,383
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,094
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,048
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,266
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,534
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,098
Financing Receivable, Revolving	10
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(142)
Loans, net of unearned income	16,575	14,485
Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	4,433
Financing Receivable, Revolving Converted to Amortizing	76
Financing Receivable, Unallocated	(30)
Loans, net of unearned income	4,539	5,300
Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	498
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	317
Financing Receivable, Originated Two Years before Latest Fiscal Year	298
Financing Receivable, Originated Three Years before Latest Fiscal Year	403
Financing Receivable, Originated Four Years before Latest Fiscal Year	386
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	790
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(21)
Loans, net of unearned income	2,713	3,084
Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	30
Financing Receivable, Originated Two Years before Latest Fiscal Year	445
Financing Receivable, Originated Three Years before Latest Fiscal Year	214
Financing Receivable, Originated Four Years before Latest Fiscal Year	154
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	74
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(17)
Loans, net of unearned income	934	1,812
Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	346
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	992
Financing Receivable, Originated Two Years before Latest Fiscal Year	596
Financing Receivable, Originated Three Years before Latest Fiscal Year	217
Financing Receivable, Originated Four Years before Latest Fiscal Year	96
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	49
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(135)
Loans, net of unearned income	2,431	3,249
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	1,228
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(15)
Loans, net of unearned income	1,213	1,387
Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	361
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	247
Financing Receivable, Originated Two Years before Latest Fiscal Year	123
Financing Receivable, Originated Three Years before Latest Fiscal Year	42
Financing Receivable, Originated Four Years before Latest Fiscal Year	10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5
Financing Receivable, Revolving	233
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(2)
Loans, net of unearned income	1,023	1,250
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	12,260
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,115
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,550
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,413
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,166
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,493
Financing Receivable, Revolving	12,138
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(39)
Loans, net of unearned income	40,096
Pass [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,379
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	882
Financing Receivable, Originated Two Years before Latest Fiscal Year	913
Financing Receivable, Originated Three Years before Latest Fiscal Year	547
Financing Receivable, Originated Four Years before Latest Fiscal Year	401
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	801
Financing Receivable, Revolving	140
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(3)
Loans, net of unearned income	5,060
Pass [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	61
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	75
Financing Receivable, Originated Two Years before Latest Fiscal Year	39
Financing Receivable, Originated Three Years before Latest Fiscal Year	24
Financing Receivable, Originated Four Years before Latest Fiscal Year	24
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	40
Financing Receivable, Revolving	9
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	272
Pass [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,663
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,243
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,137
Financing Receivable, Originated Three Years before Latest Fiscal Year	252
Financing Receivable, Originated Four Years before Latest Fiscal Year	65
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	162
Financing Receivable, Revolving	332
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(5)
Loans, net of unearned income	4,849
Pass [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	224
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	601
Financing Receivable, Originated Two Years before Latest Fiscal Year	266
Financing Receivable, Originated Three Years before Latest Fiscal Year	1
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1
Financing Receivable, Revolving	679
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(11)
Loans, net of unearned income	1,761
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	133
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	250
Financing Receivable, Originated Two Years before Latest Fiscal Year	376
Financing Receivable, Originated Three Years before Latest Fiscal Year	84
Financing Receivable, Originated Four Years before Latest Fiscal Year	5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	48
Financing Receivable, Revolving	722
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	1,618
Special Mention [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	18
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	31
Financing Receivable, Originated Two Years before Latest Fiscal Year	23
Financing Receivable, Originated Three Years before Latest Fiscal Year	22
Financing Receivable, Originated Four Years before Latest Fiscal Year	10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	44
Financing Receivable, Revolving	6
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	154
Special Mention [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	2
Financing Receivable, Originated Four Years before Latest Fiscal Year	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	5
Special Mention [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	5
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	77
Financing Receivable, Originated Two Years before Latest Fiscal Year	76
Financing Receivable, Originated Three Years before Latest Fiscal Year	15
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	180
Special Mention [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	30
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	36
Financing Receivable, Originated Two Years before Latest Fiscal Year	31
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	9
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	106
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	41
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	50
Financing Receivable, Originated Two Years before Latest Fiscal Year	78
Financing Receivable, Originated Three Years before Latest Fiscal Year	55
Financing Receivable, Originated Four Years before Latest Fiscal Year	20
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4
Financing Receivable, Revolving	490
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	738
Substandard [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	38
Financing Receivable, Originated Two Years before Latest Fiscal Year	16
Financing Receivable, Originated Three Years before Latest Fiscal Year	16
Financing Receivable, Originated Four Years before Latest Fiscal Year	4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	15
Financing Receivable, Revolving	2
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	94
Substandard [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3
Financing Receivable, Originated Two Years before Latest Fiscal Year	1
Financing Receivable, Originated Three Years before Latest Fiscal Year	3
Financing Receivable, Originated Four Years before Latest Fiscal Year	4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	14
Substandard [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	69
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	114
Financing Receivable, Originated Two Years before Latest Fiscal Year	57
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	9
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	251
Substandard [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	2
Non-Accrual [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	42
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	59
Financing Receivable, Originated Two Years before Latest Fiscal Year	97
Financing Receivable, Originated Three Years before Latest Fiscal Year	20
Financing Receivable, Originated Four Years before Latest Fiscal Year	23
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	19
Financing Receivable, Revolving	158
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	418
Non-Accrual [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	14
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	23
Financing Receivable, Originated Two Years before Latest Fiscal Year	19
Financing Receivable, Originated Three Years before Latest Fiscal Year	21
Financing Receivable, Originated Four Years before Latest Fiscal Year	6
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	14
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	97
Non-Accrual [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	1
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	9
Non-Accrual [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	44
Financing Receivable, Originated Two Years before Latest Fiscal Year	1
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1
Financing Receivable, Revolving	68
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	114
Non-Accrual [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	0
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	13,952
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,526
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,112
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,208
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,665
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,489
Financing Receivable, Revolving	13,665
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(42)
Loans, net of unearned income	48,575	45,839	45,215
Total Investor Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,992
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,116
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,568
Financing Receivable, Originated Three Years before Latest Fiscal Year	268
Financing Receivable, Originated Four Years before Latest Fiscal Year	67
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	180
Financing Receivable, Revolving	1,088
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(16)
Loans, net of unearned income	7,263	6,557	6,436
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	7,588
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,680
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,510
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,142
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,180
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,016
Financing Receivable, Revolving	5,904
Financing Receivable, Revolving Converted to Amortizing	76
Financing Receivable, Unallocated	(332)
Loans, net of unearned income	29,428	$ 30,567	$ 31,501
FICO Scores, Above 720 [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	5,564
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,738
Financing Receivable, Originated Two Years before Latest Fiscal Year	809
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,023
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,279
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,709
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	13,122
FICO Scores, Above 720 [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	3,334
Financing Receivable, Revolving Converted to Amortizing	45
Financing Receivable, Unallocated	0
Loans, net of unearned income	3,379
FICO Scores, Above 720 [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	417
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	251
Financing Receivable, Originated Two Years before Latest Fiscal Year	233
Financing Receivable, Originated Three Years before Latest Fiscal Year	325
Financing Receivable, Originated Four Years before Latest Fiscal Year	304
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	580
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	2,110
FICO Scores, Above 720 [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	18
Financing Receivable, Originated Two Years before Latest Fiscal Year	305
Financing Receivable, Originated Three Years before Latest Fiscal Year	137
Financing Receivable, Originated Four Years before Latest Fiscal Year	92
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	40
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	592
FICO Scores, Above 720 [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	297
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	721
Financing Receivable, Originated Two Years before Latest Fiscal Year	392
Financing Receivable, Originated Three Years before Latest Fiscal Year	138
Financing Receivable, Originated Four Years before Latest Fiscal Year	60
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	31
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	1,639
FICO Scores, Above 720 [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	667
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	667
FICO Scores, Above 720 [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	209
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	163
Financing Receivable, Originated Two Years before Latest Fiscal Year	84
Financing Receivable, Originated Three Years before Latest Fiscal Year	30
Financing Receivable, Originated Four Years before Latest Fiscal Year	7
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3
Financing Receivable, Revolving	117
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	613
FICO Scores, 681-720 [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	525
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	189
Financing Receivable, Originated Two Years before Latest Fiscal Year	103
Financing Receivable, Originated Three Years before Latest Fiscal Year	112
Financing Receivable, Originated Four Years before Latest Fiscal Year	113
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	360
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	1,402
FICO Scores, 681-720 [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	492
Financing Receivable, Revolving Converted to Amortizing	10
Financing Receivable, Unallocated	0
Loans, net of unearned income	502
FICO Scores, 681-720 [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	57
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40
Financing Receivable, Originated Two Years before Latest Fiscal Year	35
Financing Receivable, Originated Three Years before Latest Fiscal Year	39
Financing Receivable, Originated Four Years before Latest Fiscal Year	37
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	76
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	284
FICO Scores, 681-720 [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5
Financing Receivable, Originated Two Years before Latest Fiscal Year	50
Financing Receivable, Originated Three Years before Latest Fiscal Year	22
Financing Receivable, Originated Four Years before Latest Fiscal Year	16
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	101
FICO Scores, 681-720 [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	39
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	173
Financing Receivable, Originated Two Years before Latest Fiscal Year	116
Financing Receivable, Originated Three Years before Latest Fiscal Year	41
Financing Receivable, Originated Four Years before Latest Fiscal Year	18
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	9
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	396
FICO Scores, 681-720 [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	255
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	255
FICO Scores, 681-720 [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	61
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	44
Financing Receivable, Originated Two Years before Latest Fiscal Year	20
Financing Receivable, Originated Three Years before Latest Fiscal Year	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1
Financing Receivable, Revolving	52
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	184
FICO Scores, 620-680 [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	211
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	100
Financing Receivable, Originated Two Years before Latest Fiscal Year	73
Financing Receivable, Originated Three Years before Latest Fiscal Year	64
Financing Receivable, Originated Four Years before Latest Fiscal Year	67
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	404
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	919
FICO Scores, 620-680 [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	319
Financing Receivable, Revolving Converted to Amortizing	11
Financing Receivable, Unallocated	0
Loans, net of unearned income	330
FICO Scores, 620-680 [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	21
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17
Financing Receivable, Originated Two Years before Latest Fiscal Year	19
Financing Receivable, Originated Three Years before Latest Fiscal Year	22
Financing Receivable, Originated Four Years before Latest Fiscal Year	25
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	65
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	169
FICO Scores, 620-680 [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4
Financing Receivable, Originated Two Years before Latest Fiscal Year	44
Financing Receivable, Originated Three Years before Latest Fiscal Year	23
Financing Receivable, Originated Four Years before Latest Fiscal Year	18
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	97
FICO Scores, 620-680 [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	9
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	73
Financing Receivable, Originated Two Years before Latest Fiscal Year	63
Financing Receivable, Originated Three Years before Latest Fiscal Year	27
Financing Receivable, Originated Four Years before Latest Fiscal Year	12
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	190
FICO Scores, 620-680 [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	208
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	208
FICO Scores, 620-680 [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	34
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	28
Financing Receivable, Originated Two Years before Latest Fiscal Year	13
Financing Receivable, Originated Three Years before Latest Fiscal Year	4
Financing Receivable, Originated Four Years before Latest Fiscal Year	1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1
Financing Receivable, Revolving	42
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	123
FICO Scores, Below 620 [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	31
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	44
Financing Receivable, Originated Two Years before Latest Fiscal Year	50
Financing Receivable, Originated Three Years before Latest Fiscal Year	51
Financing Receivable, Originated Four Years before Latest Fiscal Year	60
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	499
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	735
FICO Scores, Below 620 [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	181
Financing Receivable, Revolving Converted to Amortizing	7
Financing Receivable, Unallocated	0
Loans, net of unearned income	188
FICO Scores, Below 620 [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	2
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7
Financing Receivable, Originated Two Years before Latest Fiscal Year	9
Financing Receivable, Originated Three Years before Latest Fiscal Year	13
Financing Receivable, Originated Four Years before Latest Fiscal Year	15
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	52
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	98
FICO Scores, Below 620 [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3
Financing Receivable, Originated Two Years before Latest Fiscal Year	42
Financing Receivable, Originated Three Years before Latest Fiscal Year	26
Financing Receivable, Originated Four Years before Latest Fiscal Year	24
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	14
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	109
FICO Scores, Below 620 [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	22
Financing Receivable, Originated Two Years before Latest Fiscal Year	22
Financing Receivable, Originated Three Years before Latest Fiscal Year	9
Financing Receivable, Originated Four Years before Latest Fiscal Year	5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	61
FICO Scores, Below 620 [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	91
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	91
FICO Scores, Below 620 [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	11
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	11
Financing Receivable, Originated Two Years before Latest Fiscal Year	6
Financing Receivable, Originated Three Years before Latest Fiscal Year	3
Financing Receivable, Originated Four Years before Latest Fiscal Year	1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	19
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	0
Loans, net of unearned income	51
FICO Scores, Data not available [Member] [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	52
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	23
Financing Receivable, Originated Two Years before Latest Fiscal Year	13
Financing Receivable, Originated Three Years before Latest Fiscal Year	16
Financing Receivable, Originated Four Years before Latest Fiscal Year	15
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	126
Financing Receivable, Revolving	10
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(142)
Loans, net of unearned income	397
FICO Scores, Data not available [Member] [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	107
Financing Receivable, Revolving Converted to Amortizing	3
Financing Receivable, Unallocated	(30)
Loans, net of unearned income	140
FICO Scores, Data not available [Member] [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2
Financing Receivable, Originated Two Years before Latest Fiscal Year	2
Financing Receivable, Originated Three Years before Latest Fiscal Year	4
Financing Receivable, Originated Four Years before Latest Fiscal Year	5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	17
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(21)
Loans, net of unearned income	52
FICO Scores, Data not available [Member] [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	4
Financing Receivable, Originated Three Years before Latest Fiscal Year	6
Financing Receivable, Originated Four Years before Latest Fiscal Year	4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(17)
Loans, net of unearned income	35
FICO Scores, Data not available [Member] [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3
Financing Receivable, Originated Two Years before Latest Fiscal Year	3
Financing Receivable, Originated Three Years before Latest Fiscal Year	2
Financing Receivable, Originated Four Years before Latest Fiscal Year	1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(135)
Loans, net of unearned income	145
FICO Scores, Data not available [Member] [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	7
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(15)
Loans, net of unearned income	8
FICO Scores, Data not available [Member] [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	46
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	3
Financing Receivable, Revolving Converted to Amortizing	0
Financing Receivable, Unallocated	(2)
Loans, net of unearned income	$ 52

Allowance For Credit Losses (Pa

Allowance For Credit Losses (Past Due Financing Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	$ 221	$ 224
Total 30 plus DPD, Accrual Loans	554	586
Total Accrual	84,521	82,456
Nonaccrual	745	507
Loans, net of unearned income	85,266	82,963	$ 83,152
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	7	11
Total 30 plus DPD, Accrual Loans	66	62
Total Accrual	42,452	39,624
Nonaccrual	418	347
Loans, net of unearned income	42,870	39,971
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	1	1
Total 30 plus DPD, Accrual Loans	6	15
Total Accrual	5,308	5,464
Nonaccrual	97	73
Loans, net of unearned income	5,405	5,537
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	1	2
Total Accrual	291	320
Nonaccrual	9	11
Loans, net of unearned income	300	331
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	8	12
Total 30 plus DPD, Accrual Loans	73	79
Total Accrual	48,051	45,408
Nonaccrual	524	431
Loans, net of unearned income	48,575	45,839
Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	3	2
Total Accrual	5,280	4,934
Nonaccrual	114	2
Loans, net of unearned income	5,394	4,936
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	0	0
Total Accrual	1,869	1,621
Nonaccrual	0	0
Loans, net of unearned income	1,869	1,621
Total Investor Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	3	2
Total Accrual	7,149	6,555
Nonaccrual	114	2
Loans, net of unearned income	7,263	6,557
Residential First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	156	136
Total 30 plus DPD, Accrual Loans	301	266
Total Accrual	16,522	14,458
Nonaccrual	53	27
Loans, net of unearned income	16,575	14,485
Home Equity Lines of Credit[Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	19	32
Total 30 plus DPD, Accrual Loans	54	74
Total Accrual	4,493	5,259
Nonaccrual	46	41
Loans, net of unearned income	4,539	5,300
Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	13	10
Total 30 plus DPD, Accrual Loans	30	28
Total Accrual	2,705	3,078
Nonaccrual	8	6
Loans, net of unearned income	2,713	3,084
Indirect-vehicles [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	4	7
Total 30 plus DPD, Accrual Loans	23	48
Total Accrual	934	1,812
Nonaccrual	0	0
Loans, net of unearned income	934	1,812
Indirect-other consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	5	3
Total 30 plus DPD, Accrual Loans	25	28
Total Accrual	2,431	3,249
Nonaccrual	0	0
Loans, net of unearned income	2,431	3,249
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	14	19
Total 30 plus DPD, Accrual Loans	28	38
Total Accrual	1,213	1,387
Nonaccrual	0	0
Loans, net of unearned income	1,213	1,387
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	2	5
Total 30 plus DPD, Accrual Loans	17	23
Total Accrual	1,023	1,250
Nonaccrual	0	0
Loans, net of unearned income	1,023	1,250
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	213	212
Total 30 plus DPD, Accrual Loans	478	505
Total Accrual	29,321	30,493
Nonaccrual	107	74
Loans, net of unearned income	29,428	30,567
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	230	240
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	37	30
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	4	11
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	1	2
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	42	43
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	3	1
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Total Investor Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	3	1
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	104	83
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity Lines of Credit[Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	24	30
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	10	12
Financing Receivables, 30 to 59 Days Past Due [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	15	31
Financing Receivables, 30 to 59 Days Past Due [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	12	16
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	8	11
Financing Receivables, 30 to 59 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	12	13
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	185	196
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	103	122
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	22	21
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	1	3
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	23	24
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	0	1
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Total Investor Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	0	1
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	41	47
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity Lines of Credit[Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	11	12
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	7	6
Financing Receivables, 60 to 89 Days Past Due [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	4	10
Financing Receivables, 60 to 89 Days Past Due [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	8	9
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	6	8
Financing Receivables, 60 to 89 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	3	5
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due less than 90 days	$ 80	$ 97

Allowance For Credit Losses (TD

Allowance For Credit Losses (TDRs on Financing Receivables) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)obligor	Dec. 31, 2019USD ($)obligor
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	689	543
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 440	$ 374
Increase in Allowance at Modification	$ 11	$ 9
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	151	97
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 250	$ 259
Increase in Allowance at Modification	$ 0	$ 3
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	21	51
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 16	$ 29
Increase in Allowance at Modification	$ 0	$ 0
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1	$ 2
Increase in Allowance at Modification	$ 0	$ 0
Commercial investor real estate mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	11	12
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 78	$ 26
Increase in Allowance at Modification	$ 0	$ 0
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	4	12
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 5	$ 18
Increase in Allowance at Modification	$ 0	$ 2
Residential First Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	378	159
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 85	$ 32
Increase in Allowance at Modification	$ 11	$ 4
Home Equity Lines of Credit[Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0
Increase in Allowance at Modification	$ 0	$ 0
Home Equity Loan [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	43	99
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 4	$ 7
Increase in Allowance at Modification	$ 0	$ 0
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	14	37
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0
Increase in Allowance at Modification	$ 0	$ 0
Indirect-vehicles and other consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	66	75
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1	$ 1
Increase in Allowance at Modification	$ 0	$ 0
Commercial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	173	149
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 267	$ 290
Increase in Allowance at Modification	$ 0	$ 3
Total Investor Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	15	24
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 83	$ 44
Increase in Allowance at Modification	$ 0	$ 2
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	501	370
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 90	$ 40
Increase in Allowance at Modification	$ 11	$ 4

Allowance For Credit Losses (Na

Allowance For Credit Losses (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payroll Protection Program loans		$ 3,600
Provision for credit losses (1)		878
Provision for credit losses (1)		2,293	$ 914	$ 891
CECL [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for credit losses (1)	$ 501
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual, No Allowance		$ 112
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing period for consumer loans, in years		15 years
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing period for consumer loans, in years		30 years

Servicing of Financial Assets_2

Servicing of Financial Assets (Analysis Of Residential MSRs Under The Fair Value Measurement Method) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying Value, beginning of period	$ 345
Carrying value, end of period	296	$ 345
Residential Mortgage [Member]
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying Value, beginning of period	345	418	$ 336
Additions	108	42	111
Increase (decrease) in fair value, due to change in valuation inputs or assumptions	(89)	(62)	18
Increase (decrease) in fair value, economic amortization associated with borrower repayments	(68)	(53)	(47)
Carrying value, end of period	$ 296	$ 345	$ 418

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 Mortgage Servicing Rights) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)basis_point	Dec. 31, 2019USD ($)basis_point	Dec. 31, 2018USD ($)
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance	$ 34,454	$ 34,467
Weighted-average CPR (%)	15.60%	12.00%
Estimated impact on fair value of a 10% increase	$ (23)	$ (19)
Estimated impact on fair value of a 20% increase	$ (42)	$ (35)
Option-adjusted spread (basis points) | basis_point	560	618
Estimated impact on fair value of a 10% increase	$ (7)	$ (8)
Estimated impact on fair value of a 20% increase	$ (13)	$ (16)
Weighted-Average Coupon Interest Rate	3.90%	4.20%
Weighted-average servicing fee (basis points) | basis_point	27.5	27.3
Weighted-average remaining maturity (months)	287 months	278 months
Residential Mortgage [Member]
Servicing Assets at Fair Value [Line Items]
Servicing related fees and other ancillary income	$ 95	$ 102	$ 95

Servicing of Financial Assets_4

Servicing of Financial Assets (Schedule of Fees Resulting From The Servicing Of Residential Mortgage Loans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Residential Mortgage [Member]
Servicing related fees and other ancillary income
Servicing related fees and other ancillary income	$ 95	$ 102	$ 95

Servicing of Financial Assets_5

Servicing of Financial Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 27, 2019
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance		$ 34,454	$ 34,467
Residential mortgage servicing rights at fair value		296	345
Unpaid Principal Balance of Outstanding Underlying MSRs Purchased			409	$ 6,100
Payments to Acquire Mortgage Servicing Rights (MSR)		59	24	71
Flow Purchase price [Member] [Domain]
Servicing Assets at Fair Value [Line Items]
Payments to Acquire Mortgage Servicing Rights (MSR)		59	13
Purchase price [Member]
Servicing Assets at Fair Value [Line Items]
Payments to Acquire Mortgage Servicing Rights (MSR)				$ 77
Bulk Purchase price [Member] [Domain]
Servicing Assets at Fair Value [Line Items]
Payments to Acquire Mortgage Servicing Rights (MSR)	$ 7		4
Residential Real Estate [Member]
Servicing Assets at Fair Value [Line Items]
Servicing Asset					$ 2
DUS Portfolio [Member]
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance		4,500	3,900
Commercial Real Estate [Member]
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Amortized Cost		74	59
Residential mortgage servicing rights at fair value		$ 81	64
Residential First Mortgage [Member]
Servicing Assets at Fair Value [Line Items]
Financing Receivable, Significant Sales			$ 167

Other Earning Assets (Schedule

Other Earning Assets (Schedule Of Investments in Federal Reserve Bank Stock And Federal Home Loan Bank Stock) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank Stock and Federal Reserve Bank Stock [Abstract]
Federal Reserve Bank Stock	$ 492	$ 492
Federal Home Loan Bank Stock	$ 15	$ 209

Other Earning Assets (Narrative

Other Earning Assets (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Equity Securities, FV-NI	$ 388	$ 450
Equity Securities, FV-NI, Unrealized Loss	$ 12

Premises and Equipment (Schedul

Premises and Equipment (Schedule of Premises and Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 4,610	$ 4,614
Accumulated depreciation and amortization	(2,713)	(2,654)
Premises and equipment, net	1,897	1,960
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	434	446
Premises and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	1,678	1,783
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	1,041	1,023
Software
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	836	756
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	413	407
Construction in progress
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 208	$ 199

Intangible Assets (Schedule Of

Intangible Assets (Schedule Of Goodwill By Segment) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 5,190	$ 4,845
Corporate Bank [Member]
Goodwill [Line Items]
Goodwill	2,819	2,474
Consumer Bank [Member]
Goodwill [Line Items]
Goodwill	1,978	1,978
Wealth Management [Member]
Goodwill [Line Items]
Goodwill	$ 393	$ 393

Intangible Assets (Schedule o_2

Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,268	$ 1,222
Finite-Lived Intangible Assets, Accumulated Amortization	1,164	1,135
Finite-Lived Intangible Assets, Net	122	105
Core Deposits [Member]
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,011	1,011
Finite-Lived Intangible Assets, Accumulated Amortization	991	980
Finite-Lived Intangible Assets, Net	20	31
Purchased Credit Card Relationships [Member]
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	175	175
Finite-Lived Intangible Assets, Accumulated Amortization	149	140
Finite-Lived Intangible Assets, Net	26	35
Other Intangible Assets [Member]
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	82	36
Finite-Lived Intangible Assets, Accumulated Amortization	24	15
Finite-Lived Intangible Assets, Net	58	21
Fannie Mae DUS License [Member]
Other Intangible Assets [Line Items]
Other Intangible Assets, Net	15	15
Other Intangible Assets [Member]
Other Intangible Assets [Line Items]
Other Intangible Assets, Net	$ 3	$ 3

Intangible Assets (Aggregate Am

Intangible Assets (Aggregate Amount of Amortization Expense) (Details) $ in Millions	Dec. 31, 2020USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 27
Finite-Lived Intangible Assets, Amortization Expense, Year Two	22
Finite-Lived Intangible Assets, Amortization Expense, Year Three	18
Finite-Lived Intangible Assets, Amortization Expense, Year Four	12
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 8

Intangible Assets (Narrative) (

Intangible Assets (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)unit	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill) | $	$ 0	$ 0	$ 0
Number of Reporting Units | unit	3

Deposits (Schedule of Interest-

Deposits (Schedule of Interest-Bearing Deposits) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deposits [Abstract]
Savings	$ 11,635	$ 8,640
Interest-bearing transaction	24,484	20,046
Money market—domestic	29,719	25,326
Time deposits	5,341	7,442
Interest-bearing customer deposits	71,179	61,454
Interest-bearing Domestic Deposit, Certificates of Deposits	11	108
Interest-bearing Domestic Deposit, Other	0	1,800
Interest-bearing Deposit Liabilities, Total	$ 71,190	$ 63,362

Deposits (Schedule of Aggregate

Deposits (Schedule of Aggregate Amount of Maturities of All Time Deposits) (Details) $ in Millions	Dec. 31, 2020USD ($)
Deposits [Abstract]
Time Deposit Maturities, Next Twelve Months	$ 3,721
Time Deposit Maturities, Year Two	843
Time Deposit Maturities, Year Three	446
Time Deposit Maturities, Year Four	149
Time Deposit Maturities, Year Five	102
Time Deposit Maturities, after Year Five	91
Time Deposits, Total	$ 5,352

Deposits (Narrative) (Details)

Deposits (Narrative) (Details)	Dec. 31, 2020USD ($)
Deposits [Abstract]
Time Deposits, $250,000 or More	$ 696,000,000

Borrowings (Schedule of Long-Te

Borrowings (Schedule of Long-Term Borrowings) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term borrowings	$ 3,569	$ 7,879
Parent Company [Member]
Debt Instrument [Line Items]
Long-term borrowings	2,718	2,950
Parent Company [Member] | Senior Notes [Member] | Three Point Two Zero Percent Senior Notes Due February 2021 [Member]
Debt Instrument [Line Items]
Long-term borrowings	360	358
Parent Company [Member] | Senior Notes [Member] | Two Point Seven Five Percent Senior Notes Due August 2022 [Member]
Debt Instrument [Line Items]
Long-term borrowings	0	997
Parent Company [Member] | Senior Notes [Member] | Three Point Eight Zero Percent Senior Notes Due August 2023 [Member] [Member]
Debt Instrument [Line Items]
Long-term borrowings	997	996
Parent Company [Member] | Senior Notes [Member] | Two Point Two Five Percent Senior Notes Due April Two Thousand Twenty Five [Member]
Debt Instrument [Line Items]
Long-term borrowings	744	0
Parent Company [Member] | Subordinated Debt [Member] | Seven Point Seven Five Percent Subordinated Notes Due September Two Thousand Twenty Four [Member]
Debt Instrument [Line Items]
Long-term borrowings	100	100
Parent Company [Member] | Subordinated Debt [Member] | Six Point Seven Five Percent Subordinated Debentures Due November Two Thousand Twenty Five [Member]
Debt Instrument [Line Items]
Long-term borrowings	155	156
Parent Company [Member] | Subordinated Debt [Member] | Seven Point Three Seven Five Percent Subordinated Notes Due December Two Thousand Thirty Seven [Member]
Debt Instrument [Line Items]
Long-term borrowings	298	298
Parent Company [Member] | Valuation Adjustments On Hedged Long Term Debt [Member]
Debt Instrument [Line Items]
Long-term borrowings	64	45
Regions Bank [Member]
Debt Instrument [Line Items]
Long-term borrowings	851	4,929
Regions Bank [Member] | Senior Notes [Member] | Two Point Seven Five Percent Senior Notes Due April Two Thousand Twenty-One [Member]
Debt Instrument [Line Items]
Long-term borrowings	190	549
Regions Bank [Member] | Senior Notes [Member] | Three Month LIBOR Plus Point Three Eight Percent of Floating Rate Senior Notes due April 2021 [Member]
Debt Instrument [Line Items]
Long-term borrowings	66	350
Regions Bank [Member] | Senior Notes [Member] | Three Point Three Seven Four Percent Senior Notes Converting to Three Month LIBOR Plus Point Five Zero Percent and Callable August Two Thousand Twenty-One, Due August Two Thousand Twenty-One [Member]
Debt Instrument [Line Items]
Long-term borrowings	0	499
Regions Bank [Member] | Senior Notes [Member] | Three Month LIBOR Plus Point Five Zero Percent of Floating Senior Notes, callable August 2020, due August 2021 [Member]
Debt Instrument [Line Items]
Long-term borrowings	0	499
Regions Bank [Member] | Subordinated Debt [Member] | Six Point Four Five Percent Subordinated Notes Due June Two Thousand Thirty Seven [Member]
Debt Instrument [Line Items]
Long-term borrowings	496	495
Regions Bank [Member] | Subordinated Debt [Member] | Ascentium Note Securitizations[Member]
Debt Instrument [Line Items]
Long-term borrowings	97	0
Regions Bank [Member] | Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Long-term borrowings	0	2,501
Regions Bank [Member] | Other Long Term Debt [Member]
Debt Instrument [Line Items]
Long-term borrowings	2	32
Regions Bank [Member] | Valuation Adjustments On Hedged Long Term Debt [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 0	$ 4

Borrowings (Schedule of Maturit

Borrowings (Schedule of Maturities of Long-Term Borrowings) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Schedule of Maturities of Long-Term Debt [Line Items]
Long-term borrowings	$ 3,569	$ 7,879
Parent Company [Member]
Schedule of Maturities of Long-Term Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	360
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	1,061
Long-term Debt, Maturities, Repayments of Principal in Year Four	100
Long-term Debt, Maturities, Repayments of Principal in Year Five	899
Long-term Debt, Maturities, Repayments of Principal after Year Five	298
Long-term borrowings	2,718	2,950
Regions Bank [Member]
Schedule of Maturities of Long-Term Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	256
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	40
Long-term Debt, Maturities, Repayments of Principal in Year Five	57
Long-term Debt, Maturities, Repayments of Principal after Year Five	498
Long-term borrowings	$ 851	$ 4,929

Borrowings (Narrative) (Details

Borrowings (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)agreement	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Short-term borrowings	$ 0	$ 2,050
Gain (Loss) on Extinguishment of Debt	(22)	$ (16)	$ 0
Total Borrowing Capacity with the FHLB	$ 16,200
Debt, Weighted Average Interest Rate	2.70%	3.40%	3.20%
Proceeds from Issuance of Debt	$ 750
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
FHLB Advances Weighted Average Interest Rate		1.90%	2.60%
Minimum [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.45%
Maximum [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.75%
Parent Company [Member]
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt	$ (14)	$ (16)	$ 0
Parent Company [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Subordinated Long-term Debt	$ 553
Number Of Issuances Of Debt | agreement	3
Regions Bank [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Subordinated Long-term Debt	$ 496
Number Of Issuances Of Debt | agreement	1

Regulatory Capital Requiremen_3

Regulatory Capital Requirements and Restrictions (Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations) (Details) - Standardized Approach [Member] $ in Millions	Dec. 31, 2020USD ($)		Dec. 31, 2019USD ($)
Regions Financial Corporation [Member]
Basel III Common Equity Tier 1 Capital
Basel III common equity Tier 1, Amount	$ 10,525		$ 10,228
Basel III common equity Tier 1, Ratio	0.0984	[1]	0.0968
Basel III common equity Tier 1,Minimum Requirement	0.0450		0.0450
Tier One Risk Based Capital
Tier 1 Capital, Amount	$ 12,181		$ 11,537
Tier 1 Capital, Ratio	0.1139	[1]	0.1091
Tier 1 Capital, Minimum Requirement	0.0600		0.0600
Tier 1 Capital, To Be Well Capitalized	0.0600		0.0600
Total Capital
Total Capital, Amount	$ 14,498		$ 13,406
Total Capital, Ratio	0.1356	[1]	0.1268
Total Capital, Minimum Requirement	0.0800		0.0800
Total Capital, To Be Well Capitalized	0.1000		0.1000
Leverage Capital
Leverage, Amount	$ 12,181		$ 11,537
Leverage, Ratio	0.0871	[1]	0.0965
Leverage, Minimum Requirement	0.0400		0.0400
Regions Bank [Member]
Basel III Common Equity Tier 1 Capital
Basel III common equity Tier 1, Amount	$ 12,972		$ 12,212
Basel III common equity Tier 1, Ratio	0.1217	[1]	0.1158
Basel III common equity Tier 1,Minimum Requirement	0.0450		0.0450
Basel III common equity Tier 1, To Be Well Capitalized	0.0650		0.0650
Tier One Risk Based Capital
Tier 1 Capital, Amount	$ 12,972		$ 12,212
Tier 1 Capital, Ratio	0.1217	[1]	0.1158
Tier 1 Capital, Minimum Requirement	0.0600		0.0600
Tier 1 Capital, To Be Well Capitalized	0.0800		0.0800
Total Capital
Total Capital, Amount	$ 14,803		$ 13,621
Total Capital, Ratio	0.1389	[1]	0.1292
Total Capital, Minimum Requirement	0.0800		0.0800
Total Capital, To Be Well Capitalized	0.1000		0.1000
Leverage Capital
Leverage, Amount	$ 12,972		$ 12,212
Leverage, Ratio	0.0930	[1]	0.1024
Leverage, Minimum Requirement	0.0400		0.0400
Leverage, To Be Well Capitalized	0.0500		0.0500
[1]	The 2020 Basel III CET1 capital, Tier 1 capital, Total capital, and Leverage capital ratios are estimated.

Regulatory Capital Requiremen_4

Regulatory Capital Requirements and Restrictions Narrative (Details)	Dec. 31, 2020
Banking and Thrift, Other Disclosures [Abstract]
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum	3

Leases (Lessee_ Information rel

Leases (Lessee: Information related to Operating Leases) (Details)	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	9 years 7 months 6 days	9 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	2.70%	3.20%

Leases (Lessee_ Schedule of Fut

Leases (Lessee: Schedule of Future, Undiscounted Minimum Lease Payments on Operating Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 99
Lessee, Operating Lease, Liability, Payments, Due Year Two	92
Lessee, Operating Lease, Liability, Payments, Due Year Three	84
Lessee, Operating Lease, Liability, Payments, Due Year Four	70
Lessee, Operating Lease, Liability, Payments, Due Year Five	58
Lessee, Operating Lease, Liability, Payments, Due after Year Five	248
Lessee, Operating Lease, Liability, Payments, Due	651
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	106
Operating Lease, Liability	$ 545	$ 514
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities	us-gaap:OtherLiabilities

Leases (Lessor_ Summary of Sale

Leases (Lessor: Summary of Sales-Type, Direct Financing, Operating and Leveraged Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net Interest Income and Other Financing Income
Sales-Type and Direct Financing	$ 59	$ 33
Operating Lease, Lease Income	8	11
Leveraged Leases, Income Loss	14	14
Lease Income	81	58
Sales-Type and Direct Financing [Abstract]
Sales-type and direct financing lease receivable	1,293	1,068
Sales-type and direct financing, unearned income.	(232)	(215)
Sales type and direct financing lease Guaranteed residual	36	32
Sales Type and Direct Financing Unguaranteed residual	183	152
Total net investment	1,280	1,037
Operating [Abstract]
Operating	60	113
Unearned Income	(15)	(29)
Guaranteed residual	0	0
Unguaranteed residual	155	213
Total net investment	200	297
Leveraged
Lease Receivable	174	182
Unearned Income	(96)	(113)
Guaranteed residual	0	0
Unguaranteed residual	144	147
Total net investment	222	216
Total
Lease Receivable	1,527	1,363
Unearned Income	(343)	(357)
Guaranteed residual	36	32
Unguaranteed residual	482	512
Total net investment	$ 1,702	$ 1,550

Leases (Lessor_ Schedule of Min

Leases (Lessor: Schedule of Minimum Future Payments Due From Customers for Sales-Type, Direct Financing, and Operating Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Remainder of Fiscal Year	$ 297
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years	236
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years	178
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years	118
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years	76
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter	388
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	1,293
Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year	24
Lessor, Operating Lease, Payments to be Received, Two Years	14
Lessor, Operating Lease, Payments to be Received, Three Years	7
Lessor, Operating Lease, Payments to be Received, Four Years	6
Lessor, Operating Lease, Payments to be Received, Five Years	3
Lessor, Operating Lease, Payments to be Received, Thereafter	6
Lessor, Operating Lease, Payments to be Received	60	$ 113
Lessor, Sales-type, Direct Financing and Operating Leases, Payments to be Received, Remainder of Fiscal Year	321
Lessor, Sales-type, Direct Financing and Operating Leases, Payments to be Received, Two Years	250
Lessor, Sales-type, Direct Financing and Operating Leases, Payments to be Received, Three Years	185
Lessor, Sales-type, Direct Financing and Operating Leases, Payments to be Received, Four Years	124
Lessor, Sales-type, Direct Financing and Operating Leases, Payments to be Received, Five Years	79
Lessor, Sales-type, Direct Financing and Operating Leases, Payments to be Received, Thereafter	394
Lessor, Sales-type, Direct Financing and Operating Leases, Payments to be Received	$ 1,353

Leases (Narrative) (Details)

Leases (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 475	$ 443
Operating Lease, Liability	545	514
Operating Lease, Cost	85	81
Leveraged Leases, Income Statement, Income Tax Expense on Leveraged Leases	$ 8	$ 9

Stockholders' Equity and Accu_3

Stockholders' Equity and Accumulated Other Comprehensive Income (Loss) (Preferred Stock Issuances) (Details) - USD ($)		Aug. 15, 2029	Sep. 15, 2025	Dec. 31, 2020	Sep. 15, 2024	Dec. 31, 2019
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference, Value				$ 1,850,000,000
Preferred Stock, Carrying Amount				$ 1,656,000,000		$ 1,310,000,000
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1]			6.375%
Preferred Stock, Liquidation Preference, Value				$ 500,000,000
Preferred stock, liquidation preference per share				$ 1,000,000,000
Preferred Stock, Carrying Amount				$ 387,000,000		387,000,000
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1],[2]			6.375%
Preferred Stock, Liquidation Preference, Value				$ 500,000,000
Preferred stock, liquidation preference per share				$ 1,000,000,000
Preferred Stock, Carrying Amount				$ 433,000,000		433,000,000
Series C Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1],[3]			5.70%
Preferred Stock, Liquidation Preference, Value				$ 500,000,000
Preferred stock, liquidation preference per share				$ 1,000,000,000
Preferred Stock, Carrying Amount				$ 490,000,000		490,000,000
Series D Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1],[4]			5.75%
Preferred Stock, Liquidation Preference, Value				$ 350,000,000
Preferred stock, liquidation preference per share				$ 100,000,000,000
Preferred Stock, Carrying Amount				$ 346,000,000		$ 0
Scenario, Forecast [Member] | Series B Preferred Stock Dividend Scenario 1 [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage					6.375%
Scenario, Forecast [Member] | Series C Preferred Stock Dividend Scenario 1 Member [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage		5.70%
Scenario, 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%
Scenario, Forecast [Member] | Series D Preferred Stock Dividend Scenario 1 Member [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage			5.75%
Plus 3-Month LIBOR [Member] | Scenario, 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 5-year Treasury rate [Member] | Scenario, Forecast [Member] | Series D Preferred Stock Dividend Scenario 2 Member [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				$ 25,000,000
Depositary Shares [Member] | Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, liquidation preference per share				25,000,000
Depositary Shares [Member] | Series C Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, liquidation preference per share				25,000,000
Depositary Shares [Member] | Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, liquidation preference per share				$ 1,000,000,000
[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%.

Stockholders' Equity and Accu_4

Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)(Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Pre-tax AOCI activity, Period Start		$ (120)	$ (1,289)		$ (1,002)
Other Comprehensive Income (Loss), before Tax		1,879	1,169		(287)
Pre-tax AOCI activity, Period End		1,759	(120)		(1,289)
Tax Effect, period start	[1]	30	325		253
Unrealized holding gains (losses) arising during the period on securities available for sale, Tax		(200)	(196)		83
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		(1)	7		0
Net actuarial gains and losses arising during the period, tax		(36)	(50)		4
Other Comprehensive Income (Loss), Tax	[1]	(474)	(295)		72
Tax Effect, period end		(444)	30	[1]	325	[1]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		(90)	(964)		(749)
Reclassification adjustments for securities gains (losses) realized in net income (net of tax)		3	(21)		0
Other comprehensive income (loss), net of tax		1,405	874		(215)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End		1,315	(90)		(964)
Accumulated Net Unrealized Loss on Held To Maturity Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Pre-tax AOCI activity, Period Start		(29)	(36)		(45)
Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, before Tax	[2]	8	7		9
Pre-tax AOCI activity, Period End		(21)	(29)		(36)
Tax Effect, period start	[1]	7	9		12
Reclassification adjustments for Amortization of Unrealized Losses on Securities Transferred to Held to Maturity, Tax	[1],[2]	(2)	(2)		(3)
Tax Effect, period end	[1]	5	7		9
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		(22)	(27)		(33)
Reclassification adjustments for Amortization of Unrealized Losses on Securities Transferred to Held to Maturity (net of tax)	[2]	6	5		6
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End		(16)	(22)		(27)
Accumulated Net Unrealized Securities Available For Sale Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Pre-tax AOCI activity, Period Start		274	(531)		(204)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax		792	777		(327)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	[3]	(4)	28
Other Comprehensive Income (Loss), before Tax		788	805
Pre-tax AOCI activity, Period End		1,062	274		(531)
Tax Effect, period start	[1]	(69)	134		51
Unrealized holding gains (losses) arising during the period on securities available for sale, Tax	[1]	200	196		(83)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	[1],[3]	1	(7)
Other Comprehensive Income (Loss), Tax	[1]	(199)	(203)
Tax Effect, period end	[1]	(268)	(69)		134
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		205	(397)		(153)
Unrealized holding gains (losses) arising during the period on securities available for sale, net of tax		592	581		(244)
Reclassification adjustments for securities gains (losses) realized in net income (net of tax)	[3]	(3)	21
Other comprehensive income (loss), net of tax		589	602
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End		794	205		(397)
Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Pre-tax AOCI activity, Period Start		430	(84)		(68)
Other Comprehensive Income (Loss), before Tax		1,180	514		(16)
Unrealized holding gains (losses) on derivatives arising during the period, before Tax		1,440	490		(4)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	[2]	(260)	24		(12)
Pre-tax AOCI activity, Period End		1,610	430		(84)
Tax Effect, period start	[1]	(108)	21		17
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	[1]	(363)	(123)		1
Reclassification adjustments for derivatives gains (losses) realized in net income, Tax	[1],[2]	65	(6)		3
Other Comprehensive Income (Loss), Tax	[1]	(298)	(129)		4
Tax Effect, period end	[1]	(406)	(108)		21
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		322	(63)		(51)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax		1,077	367		(3)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	[2]	(195)	18		(9)
Other comprehensive income (loss), net of tax			385		(12)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End		1,204	322		(63)
Accumulated Defined Benefit Pension Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Pre-tax AOCI activity, Period Start		(795)	(638)		(685)
Other Comprehensive Income (Loss), before Tax		(97)	(157)		47
Net actuarial gains (losses) arising during the period, before tax		(144)	(200)		11
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income, before Tax	[4]	47	43		36
Pre-tax AOCI activity, Period End		(892)	(795)		(638)
Tax Effect, period start	[1]	200	161		173
Net actuarial gains and losses arising during the period, tax	[1]	36	50		(4)
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income, Tax	[1],[4]	(11)	(11)		(8)
Other Comprehensive Income (Loss), Tax	[1]	25	39		(12)
Tax Effect, period end	[1]	225	200		161
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start		(595)	(477)		(512)
Net actuarial gains (losses) arising during the period (net of tax)		(108)	(150)		7
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (net of tax)	[4]	36	32		28
Other comprehensive income (loss), net of tax		(72)	(118)		35
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End		$ (667)	$ (595)		$ (477)
[1]	The tax impact of each component of AOCI is 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 18 for additional details).

Stockholders' Equity And Accu_5

Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Sep. 15, 2025	Sep. 15, 2024	Jun. 28, 2019	Dec. 15, 2017
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred stock dividends	$ (103,000,000)	$ (79,000,000)	$ (64,000,000)
Stock Repurchase Program, Authorized Amount						$ 1,370,000,000
Cash dividend declared (in dollars per share)	$ 0.62	$ 0.59	$ 0.46
Debt Instrument, Redemption, Period One [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred Stock, Redemption Terms	90 day
Series A and B Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred stock dividends	$ (64,000,000)	$ (64,000,000)
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
Series B Preferred Stock [Member] | Subsequent Event [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount					$ 67,000,000
PreferredDividendsReductiontoRetainedEarningsatRedemption					52,000,000
PreferredStockIssuanceCostsReductiontoNetIncome					15,000,000
Series C Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred stock dividends	(28,000,000)	(15,000,000)
Series C Preferred Stock [Member] | Subsequent Event [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount					10,000,000
PreferredDividendsReductiontoRetainedEarningsatRedemption					$ 10,000,000
Series D Preferred Stock
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred stock dividends	(11,000,000)
Series D Preferred Stock | Subsequent Event [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount				$ 4,000,000
PreferredDividendsReductiontoRetainedEarningsatRedemption				$ 4,000,000
Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred stock dividends	$ (103,000,000)	$ (79,000,000)

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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Income from continuing operations	$ 1,094	$ 1,582	$ 1,568
Preferred stock dividends	(103)	(79)	(64)
Net Income from Continuing Operations Available to Common Shareholders, Basic	991	1,503	1,504
Income from discontinued operations, net of tax	0	0	191
Net income available to common shareholders	$ 991	$ 1,503	$ 1,695
Denominator:
Weighted-average common shares outstanding—basic	959	995	1,092
Potential common shares	3	4	10
Weighted-average common shares outstanding—diluted	962	999	1,102
Earnings per common share from continuing operations:
Basic	$ 1.03	$ 1.51	$ 1.38
Diluted	1.03	1.50	1.36
Earnings (loss) per common share from discontinued operations:
Basic	0	0	0.18
Diluted	0	0	0.17
Earnings per common share:
Basic	1.03	1.51	1.55
Diluted	$ 1.03	$ 1.50	$ 1.54
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	7	7	6

Share-Based Payments (Summary O

Share-Based Payments (Summary Of Compensation Costs Recognized In The Consolidated Statements of Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Tax benefits related to compensation cost	$ (13)	$ (13)	$ (13)
Allocated Share-based Compensation Expense, Net of Tax	40	38	37
Restricted Stock Awards [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-Based Compensation Expense	$ 53	$ 51	$ 50

Share-Based Payments (Summary_2

Share-Based Payments (Summary Of Activity Related To Stock Options) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options, Outstanding at beginning of period	967,769	1,724,723	9,407,898
Number of Options, Granted	0	0	0
Number of Options, Exercised	(911,181)	(756,954)	(1,619,206)
Number of Options, Forfeited or Expired	(29,917)	0	(6,063,969)
Number of Options, Outstanding at end of period	26,671	967,769	1,724,723	9,407,898
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	4 months 28 days
Number of Options, Exercisable at end of period	26,671
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-Average Exercise Price, Outstanding at beginning of period	$ 6.80	$ 6.86	$ 16.58
Weighted-Average Exercise Price, Granted	0	0	0
Weighted-Average Exercise Price, Exercised	6.80	6.93	7.08
Weighted-Average Exercise Price, Forfeited or Expired	7	0	21.88
Weighted-Average Exercise Price, Outstanding at end of period	6.54	$ 6.80	$ 6.86	$ 16.58
Weighted-Average Exercise Price, Exercisable at end of period	$ 6.54
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Aggregate Intrinsic Value, at end of period	$ 0	$ 10	$ 11	$ 35
Aggregate intrinsic Value, Exercisable at end of period	$ 0
Weighted-Average Contractual Term (in years), Outstanding	4 months 28 days	9 months 29 days	1 year 8 months 26 days	1 year 18 days

Share-Based Payments (Summary_3

Share-Based Payments (Summary Of Restricted Stock Awards And Performance Stock Awards Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of Shares, Non-vested at beginning of period (in dollars per share)	8,997,358	11,528,537	15,263,034
Number of Shares, Granted (in shares)	6,466,526	3,971,303	3,051,090
Number of Shares, Vested (in shares)	(3,314,572)	(6,068,969)	(6,038,566)
Number of Shares, Forfeited (in shares)	(467,152)	(433,513)	(747,021)
Number of Shares, Non-vested at end of period (in dollars per share)	11,682,160	8,997,358	11,528,537
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Grant Date Fair Value, Non-vested at beginning of period	$ 15.62	$ 12.32	$ 10.12
Weighted-Average Grant Date Fair Value, Granted	8.46	14.70	18.17
Weighted-Average Grant Date Fair Value, Vested	14.60	8.47	9.64
Weighted-Average Grant Date Fair Value, Forfeited	11.86	15.25	13
Weighted-Average Grant Date Fair Value, Non-vested at end of period	$ 12.14	$ 15.62	$ 12.32

Share-Based Payments (Narrative

Share-Based Payments (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 23, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of incentive awards (in years)	3 years
Contractual lives of options granted under long-term incentive compensation plans	10 years
Number of Common Share Equivalents Authorized Under Long-term Incentive Plans				60,000,000
Number of Remaining Common Share Equivalents Available for Grant Under Long-term Incentive Plans	33,000,000
Aggregate intrinsic value of exercised options	$ 8,000,000	$ 8,000,000	$ 10,000,000
Cash received from options exercised	5,000,000	5,000,000	11,000,000
Pre Tax Amount Of Non Vested Stock Options And Restricted Stock Awards And Units Not Yet Recognized	43,000,000
Total fair value of shares vested during the period	35,000,000	89,000,000	112,000,000
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 1,000,000	$ 2,000,000	$ 4,000,000

Employee Benefit Plans (Schedul

Employee Benefit Plans (Schedule of Defined Benefit Plans Disclosures) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in Benefit Obligation [Roll Forward]
Projected Benefit Obligation, Beginning of Period	$ 2,364,000,000	$ 2,010,000,000
Service cost	39,000,000	31,000,000	$ 38,000,000
Interest cost	68,000,000	80,000,000	75,000,000
Actuarial Gains (Losses)	299,000,000	382,000,000
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(144,000,000)	(129,000,000)
Administration Expenses	(3,000,000)	(3,000,000)
Plan Settlements	0	(7,000,000)
Projected Benefit Obligation, End of Period	2,623,000,000	2,364,000,000	2,010,000,000
Change in Plan Assets [Roll Forward]
Fair Value of Plan Assets, beginning of period	2,299,000,000	2,105,000,000
Actual Return on Plan Assets	(303,000,000)	(319,000,000)
Company Contributions	14,000,000	14,000,000
Defined Benefit Plan, Plan Assets, Benefits Paid	(144,000,000)	(129,000,000)
Administration Expenses	(3,000,000)	(3,000,000)
Plan Settlements	0	(7,000,000)
Fair Value of Plan Assets, end of period	2,469,000,000	2,299,000,000	2,105,000,000
Funded Status and Accrued Benefit Cost at Measurement Date	(154,000,000)	(65,000,000)
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	(154,000,000)	(65,000,000)
Pre-tax amounts recognized in Accumulated Other Comprehensive (Income) Loss:
Net actuarial loss	899,000,000	802,000,000
Qualified Plan [Member] | Pension Plan [Member]
Change in Benefit Obligation [Roll Forward]
Projected Benefit Obligation, Beginning of Period	2,192,000,000	1,865,000,000
Service cost	34,000,000	28,000,000	35,000,000
Interest cost	64,000,000	75,000,000	70,000,000
Actuarial Gains (Losses)	278,000,000	349,000,000
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(130,000,000)	(122,000,000)
Administration Expenses	(3,000,000)	(3,000,000)
Plan Settlements	0	0
Projected Benefit Obligation, End of Period	2,435,000,000	2,192,000,000	1,865,000,000
Change in Plan Assets [Roll Forward]
Fair Value of Plan Assets, beginning of period	2,299,000,000	2,105,000,000
Actual Return on Plan Assets	(303,000,000)	(319,000,000)
Company Contributions	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	(130,000,000)	(122,000,000)
Administration Expenses	(3,000,000)	(3,000,000)
Plan Settlements	0	0
Fair Value of Plan Assets, end of period	2,469,000,000	2,299,000,000	2,105,000,000
Funded Status and Accrued Benefit Cost at Measurement Date	34,000,000	107,000,000
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	34,000,000	107,000,000
Pre-tax amounts recognized in Accumulated Other Comprehensive (Income) Loss:
Net actuarial loss	819,000,000	736,000,000
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]
Change in Benefit Obligation [Roll Forward]
Projected Benefit Obligation, Beginning of Period	172,000,000	145,000,000
Service cost	5,000,000	3,000,000	3,000,000
Interest cost	4,000,000	5,000,000	5,000,000
Actuarial Gains (Losses)	21,000,000	33,000,000
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(14,000,000)	(7,000,000)
Administration Expenses	0	0
Plan Settlements	0	(7,000,000)
Projected Benefit Obligation, End of Period	188,000,000	172,000,000	145,000,000
Change in Plan Assets [Roll Forward]
Fair Value of Plan Assets, beginning of period	0	0
Actual Return on Plan Assets	0	0
Company Contributions	14,000,000	14,000,000
Defined Benefit Plan, Plan Assets, Benefits Paid	(14,000,000)	(7,000,000)
Administration Expenses	0	0
Plan Settlements	0	(7,000,000)
Fair Value of Plan Assets, end of period	0	0	$ 0
Funded Status and Accrued Benefit Cost at Measurement Date	(188,000,000)	(172,000,000)
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	(188,000,000)	(172,000,000)
Pre-tax amounts recognized in Accumulated Other Comprehensive (Income) Loss:
Net actuarial loss	80,000,000	66,000,000
Other Assets [Member]
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	34,000,000	107,000,000
Other Assets [Member] | Qualified Plan [Member] | Pension Plan [Member]
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	34,000,000	107,000,000
Other Assets [Member] | Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	0	0
Other Liabilities [Member]
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	(188,000,000)	(172,000,000)
Other Liabilities [Member] | Qualified Plan [Member] | Pension Plan [Member]
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	0	0
Other Liabilities [Member] | Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]
Amount recognized in the Consolidated Balance Sheets:
Other assets (liabilities)	$ (188,000,000)	$ (172,000,000)

Employee Benefit Plans (Compone

Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 39	$ 31	$ 38
Interest cost	68	80	75
Expected return on plan assets	(148)	(137)	(153)
Amortization of actuarial loss	47	41	36
Settlement charge	0	2	0
Net periodic pension (benefit) cost	6	17	(4)
Qualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	34	28	35
Interest cost	64	75	70
Expected return on plan assets	(148)	(137)	(153)
Amortization of actuarial loss	39	36	31
Settlement charge	0	0	0
Net periodic pension (benefit) cost	(11)	2	(17)
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	3	3
Interest cost	4	5	5
Expected return on plan assets	0	0	0
Amortization of actuarial loss	8	5	5
Settlement charge	0	2	0
Net periodic pension (benefit) cost	$ 17	$ 15	$ 13

Employee Benefit Plans (Sched_2

Employee Benefit Plans (Schedule of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Qualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate for benefit obligation	2.48%	3.35%
Rate of annual compensation increase, benefit obligation	4.00%	4.00%
Discount rate for net periodic benefit cost	3.37%	4.39%	3.70%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.65%	6.84%	6.84%
Rate of annual compensation increase, net periodic benefit cost	4.00%	3.75%	3.75%
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate for benefit obligation	2.07%	3.05%
Rate of annual compensation increase, benefit obligation	3.00%	3.00%
Discount rate for net periodic benefit cost	3.00%	4.18%	3.49%
Rate of annual compensation increase, net periodic benefit cost	3.00%	3.75%	3.75%

Employee Benefit Plans (Present

Employee Benefit Plans (Presentation Of The Fair Value Of Regions' Qualified Defined-Benefit Pension Plans' Financial Assets) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 2,469,000,000	$ 2,299,000,000	$ 2,105,000,000
Collective Investment Trust Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets, Fair Value	671,000,000	665,000,000
Defined Benefit Plan, Common Collective Trust | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets, Fair Value	408,000,000	440,000,000
Defined Benefit Plan, Common Collective Trust | International Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets, Fair Value	46,000,000	47,000,000
Defined Benefit Plan, Common Collective Trust | Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets, Fair Value	217,000,000	178,000,000
Fair Value Measured at Net Asset Value Per Share | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets, Fair Value	188,000,000	187,000,000
Fair Value Measured at Net Asset Value Per Share | Private Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets, Fair Value	280,000,000	101,000,000
Estimate of Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,330,000,000	1,346,000,000
Estimate of Fair Value [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	50,000,000	25,000,000
Estimate of Fair Value [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	807,000,000	618,000,000
Estimate of Fair Value [Member] | Fixed Income Securities [Member] | US Treasury and Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	299,000,000	481,000,000
Estimate of Fair Value [Member] | Fixed Income Securities [Member] | Federal Agency Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	18,000,000	26,000,000
Estimate of Fair Value [Member] | Fixed Income Securities [Member] | Corporate Bond Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	490,000,000	111,000,000
Estimate of Fair Value [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	294,000,000	522,000,000
Estimate of Fair Value [Member] | Equity Securities [Member] | Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	130,000,000	346,000,000
Estimate of Fair Value [Member] | Equity Securities [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	164,000,000	176,000,000
Estimate of Fair Value [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	179,000,000	181,000,000
Estimate of Fair Value [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	822,000,000	1,209,000,000
Estimate of Fair Value [Member] | Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	50,000,000	25,000,000
Estimate of Fair Value [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	299,000,000	481,000,000
Estimate of Fair Value [Member] | Level 1 [Member] | Fixed Income Securities [Member] | US Treasury and Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	299,000,000	481,000,000
Estimate of Fair Value [Member] | Level 1 [Member] | Fixed Income Securities [Member] | Federal Agency Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 1 [Member] | Fixed Income Securities [Member] | Corporate Bond Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	294,000,000	522,000,000
Estimate of Fair Value [Member] | Level 1 [Member] | Equity Securities [Member] | Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	130,000,000	346,000,000
Estimate of Fair Value [Member] | Level 1 [Member] | Equity Securities [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	164,000,000	176,000,000
Estimate of Fair Value [Member] | Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	179,000,000	181,000,000
Estimate of Fair Value [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	508,000,000	137,000,000
Estimate of Fair Value [Member] | Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	508,000,000	137,000,000
Estimate of Fair Value [Member] | Level 2 [Member] | Fixed Income Securities [Member] | US Treasury and Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 2 [Member] | Fixed Income Securities [Member] | Federal Agency Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	18,000,000	26,000,000
Estimate of Fair Value [Member] | Level 2 [Member] | Fixed Income Securities [Member] | Corporate Bond Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	490,000,000	111,000,000
Estimate of Fair Value [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 2 [Member] | Equity Securities [Member] | Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 2 [Member] | Equity Securities [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 2 [Member] | Mutual Funds [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Fixed Income Securities [Member] | US Treasury and Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Fixed Income Securities [Member] | Federal Agency Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Fixed Income Securities [Member] | Corporate Bond Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Equity Securities [Member] | Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Equity Securities [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Estimate of Fair Value [Member] | Level 3 [Member] | Mutual Funds [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0	$ 0

Employee Benefit Plans (Informa

Employee Benefit Plans (Information About The Expected Cash Flows For The Qualified and Non-Qualified Pension Plans) (Details)	Dec. 31, 2020USD ($)
Qualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 0
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	138,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	138,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	136,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	138,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	137,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	673,000,000
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	33,000,000
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	33,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	31,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	15,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	11,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	12,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 57,000,000

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020USD ($)decimalshares	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
Minimum Years Of Service For Eligible Employees Of Postretirement Plans	1 year
Minimum Number Of Hours Worked By Employees | decimal	1,000
Automatic Cash Contribution	2.00%	2.00%	2.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 19,000,000	$ 17,000,000	$ 18,000,000
Defined Contribution Plan, Cost	$ 62,000,000	$ 58,000,000	48,000,000
Total Company Common Stock Shares Held Under Defined Contribution Plan | shares	20,000,000	21,000,000
Dividends Earned By Defined Contribution Plan	$ 12,000,000	$ 13,000,000	$ 10,000,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	5.00%	5.00%	4.00%
Qualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 2,300,000,000	$ 2,100,000,000
Expected long-term rate of return on plan assets for net periodic benefit cost, next fiscal year	5.87%
Number of shares held in plan assets relating to company's common stock (whole number) | shares	2,855,618
Approximate percentage of company's common stock shares held in plan assets	2.00%
Qualified Plan [Member] | Equity Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation For Defined Benefit Plan Equity Securities	50.00%
Qualified Plan [Member] | Fixed Income Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation For Defined Benefit Plan Equity Securities	38.00%
Qualified Plan [Member] | Other Security Investments [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation For Defined Benefit Plan Equity Securities	12.00%
Qualified Plan [Member] | Defined Benefit Plan, Equity Securities, Common Stock, Employer, Related Party [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Market Value Of Companys Common Stock Held In Plan Assets	$ 46,000,000
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 188,000,000	$ 171,000,000

Other Non-Interest Income and_3

Other Non-Interest Income and Expense (Other Non-Interest Income) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income and Expenses [Abstract]
Bank Owned Life Insurance Income		$ 95	$ 78	$ 65
Investment Services Fee Income		84	79	71
Commercial Credit Fee Income		77	73	71
Unrealized Gain (Loss) on Investments	[1]	50	0	0
Market value adjustments on employee benefit assets - defined benefit		0	5	(6)
Market value adjustments on employee benefit assets - other		12	11	(5)
Other Miscellaneous Income		$ 151	$ 130	$ 100
[1]	In the third quarter of 2020, the equity investee executed an initial public offering. The Company was subject to a conventional post-issuance 180 day lock-up period, which prevented the sale of its position until January 2021. The Company sold its position in January 2021 and recognized an immaterial gain.

Other Non-Interest Income and_4

Other Non-Interest Income and Expense (Other Non-Interest Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Outside Services	$ 170	$ 189	$ 187
Marketing Expense	94	97	92
Professional, legal and regulatory expenses	89	95	119
Credit and checkcard expense	50	68	57
FDIC insurance assessments	48	48	85
Branch Consolidation And Property and Equipment Charges	31	25	11
Visa class B shares expense	24	14	10
Loss on early extinguishment of debt	22	16	0
Provision (credit) for unfunded credit losses	18	(6)	(2)
Other Miscellaneous Expenses	354	381	404
Other	882	$ 927	$ 963
Other in Non-Interest Expense [Member]
Provision (credit) for unfunded credit losses	$ 0

Income Taxes (Components Of Inc

Income Taxes (Components Of Income Tax (Benefit) Expense) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	[1]	$ 312	$ 279	$ 175
Current State and Local Tax Expense (Benefit)	[1]	66	62	29
Current Income Tax Expense (Benefit)	[1]	378	341	204
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	[1]	(142)	29	130
Deferred State and Local Income Tax Expense (Benefit)	[1]	(16)	33	53
Deferred income tax expense (benefit)	[1]	(158)	62	183
Income tax expense (benefit)	[1],[2]	220	403	387
Income tax expense		0	0	80
Discontinued Operation Deferred Tax Effect Of Discontinued Operation		$ 0	$ 0	$ 43
[1]	The table above does not include total income tax expense from discontinued operations of zero, zero, and $80 million in 2020, 2019 and 2018, respectively. The deferred income tax expense reflected in discontinued operations was zero, zero and $43 million in 2020, 2019 and 2018, respectively
[2]	Income tax expense includes amortization of affordable housing investments of $133 million, $131 million, and $137 million for 2020, 2019 and 2018, respectively.

Income Taxes (Income Tax Rate R

Income Taxes (Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate		$ 276	$ 417	$ 410
Income tax expense	[1],[2]	$ 220	$ 403	$ 387
Effective Income Tax Rate, Continuing Operations		16.80%	20.30%	19.80%
Increase (decrease) in taxes resulting from: [Abstract]
State income tax, net of federal tax effect		$ 39	$ 75	$ 65
Tax-exempt interest		(34)	(39)	(37)
Affordable housing investment amortization, net of tax benefits (excluding Tax Reform)		(31)	(34)	(37)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		0	0	(37)
Non-deductible expenses		22	19	28
Bank-owned life insurance		(22)	(19)	(16)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		(20)	20	0
Lease financing		5	5	11
Other, net		$ (15)	$ (41)	$ 0
[1]	Income tax expense includes amortization of affordable housing investments of $133 million, $131 million, and $137 million for 2020, 2019 and 2018, respectively.
[2]	The table above does not include total income tax expense from discontinued operations of zero, zero, and $80 million in 2020, 2019 and 2018, respectively. The deferred income tax expense reflected in discontinued operations was zero, zero and $43 million in 2020, 2019 and 2018, respectively

Income Taxes (Summary Of Signif

Income Taxes (Summary Of Significant Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets [Abstract]
Allowance for loan losses	$ 573	$ 231
Deferred tax asset, right of use liability	137	124
State net operating carryforwards, net of federal tax effect	58	50
Unrealized losses included in stockholders' equity	0	30
Accrued expenses	35	30
Federal tax credit carryforwards	0	12
Other	13	16
Total deferred tax assets	816	493
Deferred Tax Assets, Valuation Allowance	(31)	(32)
Total deferred tax assets less valuation allowance	785	461
Deferred Tax Liabilities [Abstract]
unrealized gains included in shareholder's equity' deferred tax liability	444	0
Lease financing	413	354
Deferred Tax Liabilities, Right of use asset	128	115
Goodwill and intangibles	106	92
Employee benefits and deferred compensation	54	90
Fixed assets	54	42
Mortgage servicing rights	45	61
Other	46	35
Total deferred tax liabilities	1,290	789
Deferred Tax Liabilities, Net	(505)	(328)
Income Tax Contingency [Line Items]
State net operating carryforwards, net of federal tax effect	$ 58	$ 50

Income Taxes (Summary Of Detail

Income Taxes (Summary Of Detail Of Tax Carryforwards) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	$ 58	$ 50
Operating Loss Carryforwards, Valuation Allowance	(31)
Deferred Tax Assets, Net	27
Tax credit acquired in an acquisition [Member] | State Tax Authority [Member]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	2
Net Operating Losses Federal Date Range 1
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	18
Operating Loss Carryforwards, Valuation Allowance	0
Deferred Tax Assets, Net	18
Pre Tax Earnings Necessary To Realize	87
Net Operating Losses Federal Date Range 2
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	7
Operating Loss Carryforwards, Valuation Allowance	0
Deferred Tax Assets, Net	7
Net Operating Losses States Date Range One [Member]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	14
Operating Loss Carryforwards, Valuation Allowance	(14)
Deferred Tax Assets, Net	0
Pre Tax Earnings Necessary To Realize	0
Net Operating Losses States Date Range Two [Member]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	13
Operating Loss Carryforwards, Valuation Allowance	(12)
Deferred Tax Assets, Net	1
Pre Tax Earnings Necessary To Realize	8
Net Operating Losses States Date Range Three [Member]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	4
Operating Loss Carryforwards, Valuation Allowance	(3)
Deferred Tax Assets, Net	1
Pre Tax Earnings Necessary To Realize	23
Other Credits States Date Range One [Member]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	2
Operating Loss Carryforwards, Valuation Allowance	(2)
Deferred Tax Assets, Net	0
Federal Tax Authority [Member] | Tax credit acquired in an acquisition [Member]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	$ 25

Income Taxes (Reconciliation Of

Income Taxes (Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 37	$ 13	$ 27
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	2	25	0
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	0	0	11
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(25)	0	(13)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	(1)	0	(11)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(1)	(1)	(1)
Balance at end of year	$ 12	$ 37	$ 13

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	21.00%	21.00%	21.00%	35.00%
Additional Income Tax Expense (Benefit) Recognized due to Tax Reform			$ 37
Investment Tax Credit	$ 94	$ 59	90
Tax Adjustments, Settlements, and Unusual Provisions	133	131	137
Taxable Temporary Differences That Will Offset Amount Of Gross Deferred Tax Asset	1,200
Deferred Tax Assets, Net of Valuation Allowance	785	461
Deferred Tax Assets, Valuation Allowance	(31)	(32)
Decrease in Unrecognized Tax Benefits is Reasonably Possible	4
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	9	34	$ 10
State net operating carryforwards, net of federal tax effect	$ 58	$ 50

Derivative Financial Instrume_3

Derivative Financial Instruments And Hedging Activities (Schedule Of Derivative Instruments Notional And Fair Values) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		$ 128,614	$ 143,922
Estimated Fair Value, Gain	[1]	3,349	1,357
Estimated Fair Value, Loss	[1]	1,598	817
Derivative Asset, Fair Value of Derivative Contracts Offset in Accordance with Entity's Policy that were Offset Under Master Netting Agreements	[1],[2]	2,428	1,022
Derivative Liability, Fair Value of Derivative Contracts Offset In Accordance with Policy Election that were Offset Under Master Netting Agreements	[1],[2]	1,545	770
Derivative Asset	[1],[3]	921	335
Derivative Liability	[1],[3]	53	47
Cash Flow Hedge Floor Premium		83	108
Terminated Cash Flow Hedge Floor Premium		15
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		10,300	8,300
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		23,850	26,900
Estimated Fair Value, Gain	[1]	1,688	613
Derivative Asset, Fair Value, Gross Liability	[1]	0	83
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		104,764	117,022
Estimated Fair Value, Gain	[1]	1,661	744
Estimated Fair Value, Loss	[1]	1,598	734
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		76,764	68,075
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	1,492	659
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	1,464	656
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		13,806	11,347
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	90	27
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	28	9
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		4,270	27,324
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	11	10
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	26	11
Other Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		9,924	10,276
Other Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	68	48
Other Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	80	58
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		2,100	2,900
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	77	67
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Liability	[1]	0	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		21,750	24,000
Estimated Fair Value, Gain	[1]	1,611	546
Derivative Asset, Fair Value, Gross Liability	[1]	0	83
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		16,000	17,250
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	1,181	338
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Liability	[1]	0	83
Cash Flow Hedging [Member] | Interest Rate Floor [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	[4]	5,750	6,750
Cash Flow Hedging [Member] | Interest Rate Floor [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1],[4]	430	208
Cash Flow Hedging [Member] | Interest Rate Floor [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Liability	[1],[4]	0	0
US Treasury Securities [Member]
Derivatives, Fair Value [Line Items]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		$ 24	$ 24
[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]	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.
[3]	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 December 31, 2020 and December 31, 2019, financial instruments posted of $24 million, for both periods, were not offset in the consolidated balance sheets.
[4]	Estimated fair value includes premium of approximately $83 million as of December 31, 2020 and $108 million as of December 31, 2019 to be amortized over the remaining life. Approximately $15 million of the decrease since December 31, 2019 related to hedges that were terminated during the third quarter of 2020 and were not amortized into earnings as of the date of termination.

Derivative Instruments and Hedg

Derivative 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	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income related to discontinued cash flow hedges, before tax	$ 121	$ 78	$ 68
Other Comprehensive Income (loss), Unrealized Gain (loss) on terminated cash flow hedges arising during the period, before tax	55	23
Other Comprehensive Income (loss), Reclassification Adjustment from AOCI on terminated cash flow hedges, before tax	$ (12)	$ (13)

Derivative Financial Instrume_4

Derivative Financial Instruments And Hedging Activities (Schedule Of The Effect Of Derivative Instruments On The Statements Of Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Debt securities	$ 582	$ 643	$ 625
Loans, including fees	3,610	3,866	3,613
Long-term borrowings	178	351	322
Fair Value Hedging [Member] | Loans Including Fees in Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives	0	0	0
Gain or (Loss) Recognized in Income on Derivatives	0	0	0
Gain or (Loss) Recognized in Income on Related Hedged Item	0	0	0
Gain (Loss) on Fair Value Hedges Recognized in Earnings	0	0	0
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Taxable Debt Securities in Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives	0	0	(1)
Gain or (Loss) Recognized in Income on Derivatives	0	(2)	4
Gain or (Loss) Recognized in Income on Related Hedged Item	0	2	(4)
Gain (Loss) on Fair Value Hedges Recognized in Earnings	0	0	(1)
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	(37)	(14)	(15)
Gain or (Loss) Recognized in Income on Derivatives	52	92	1
Gain or (Loss) Recognized in Income on Related Hedged Item	(51)	(92)	(1)
Gain (Loss) on Fair Value Hedges Recognized in Earnings	38	(14)	(15)
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Taxable Debt Securities in Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from AOCI into Income	0	0	0
Net Income (Expense) Recognized on Cash Flow Hedges	0	0	0
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Loans Including Fees in Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net Income (Expense) Recognized on Cash Flow Hedges	260	(24)	12
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	0	0	0
Net Income (Expense) Recognized on Cash Flow Hedges	$ 0	$ 0	$ 0

Derivative Financial Instrume_5

Derivative Financial Instruments and Hedging Activities Derivative Financial Instruments and Hedging Activities (Schedule of Fair Value Hedging Basis Adjustments) (Details) - Designated as Hedging Instrument [Member] - Long-term Debt [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge	$ (2,171)	$ (2,954)
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	$ (64)	$ (49)

Derivative Financial Instrume_6

Derivative Financial Instruments And Hedging Activities (Schedule Of Gains (Losses) Recognized Related To Derivatives Not Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	$ 183	$ 117	$ 35
Mortgage Income [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	111	72	(20)
Mortgage Income [Member] | Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	83	68	(12)
Mortgage Income [Member] | Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	30	(1)	0
Mortgage Income [Member] | Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	(2)	5	(8)
Capital markets income [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	72	45	55
Capital markets income [Member] | Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	21	13	19
Capital markets income [Member] | Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	36	23	28
Capital markets income [Member] | Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	14	10	3
Capital markets income [Member] | Other Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	$ 1	$ (1)	$ 5

Derivative Financial Instrume_7

Derivative Financial Instruments And Hedging Activities (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 415,000,000
Pre-tax net income related to amortization of discontinued cash flow hedges	26,000,000
Maximum potential future exposure on swap participations	552,000,000
Aggregate fair value of all derivative instruments with credit risk	74,000,000	$ 64,000,000
Posted collateral related to derivative instruments with credit risk	74,000,000	67,000,000
Derivative, Notional Amount	128,614,000,000	143,922,000,000
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	104,764,000,000	117,022,000,000
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	924,000,000	366,000,000
Forward Sale Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,900,000,000	662,000,000
Forward Rate Commitments and Futures Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	4,100,000,000	4,800,000,000
Debt Available-for-Sale Securities [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Asset, Fair Value Hedge	301,000,000	337,000,000
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	$ 1,000,000	$ 3,000,000

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 ($) $ in Millions		Dec. 31, 2020		Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		$ 27,154		$ 22,606
Residential mortgage servicing rights		296		345
Derivative Assets	[1],[2]	921		335
Derivative Liabilities	[1],[2]	53		47
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		27,154		22,606
Loans held for sale		1,446		439
Marketable Equity Securities carried at fair value		388		450
Residential mortgage servicing rights		296		345
Derivative Assets	[3]	3,349		1,357
Other Assets, Fair Value Disclosure		74		0
Derivative Liabilities	[3]	1,598		817
Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale		4		14
Equity Investments without a Readily Determinable Fair Value		12		32
Foreclosed property and other real estate		5		42
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		183		182
Loans held for sale		0		0
Derivative Assets		2		0
Derivative Liabilities		2		0
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		183		182
Loans held for sale		0		0
Marketable Equity Securities carried at fair value		388		450
Residential mortgage servicing rights		0		0
Derivative Assets	[3]	2		0
Other Assets, Fair Value Disclosure		0		0
Derivative Liabilities	[3]	2		0
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
Equity Investments without a Readily Determinable 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		26,966		22,422
Loans held for sale		1,901		620
Derivative Assets		3,303		1,342
Derivative Liabilities		1,590		812
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		26,966		22,422
Loans held for sale		1,446		436
Marketable Equity Securities carried at fair value		0		0
Residential mortgage servicing rights		0		0
Derivative Assets	[3]	3,303		1,342
Other Assets, Fair Value Disclosure		74		0
Derivative Liabilities	[3]	1,590		812
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
Equity Investments without a Readily Determinable 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		2
Loans held for sale		4		17
Derivative Assets		44		15
Derivative Liabilities		6		5
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		5	[4]	2
Loans held for sale		0		3
Marketable Equity Securities carried at fair value		0		0
Residential mortgage servicing rights		296		345
Derivative Assets	[3]	44	[4]	15
Other Assets, Fair Value Disclosure		0		0
Derivative Liabilities	[3]	6	[4]	5
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		4	[4]	14
Equity Investments without a Readily Determinable Fair Value		12	[4]	32
Foreclosed property and other real estate		5	[4]	42
Interest Rate Swaps [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	[3]	2,750		1,064
Derivative Liabilities	[3]	1,464		739
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	[3]	0		0
Derivative Liabilities	[3]	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]	2,750		1,064
Derivative Liabilities	[3]	1,464		739
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	[3]	0		0
Derivative Liabilities	[3]	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	[3]	520		235
Derivative Liabilities	[3]	28		9
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	[3]	0		0
Derivative Liabilities	[3]	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	[3]	477		227
Derivative Liabilities	[3]	28		9
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	[3]	43	[4]	8
Derivative Liabilities	[3]	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	[3]	11		10
Derivative Liabilities	[3]	26		11
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	[3]	0		0
Derivative Liabilities	[3]	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	[3]	11		4
Derivative Liabilities	[3]	26		11
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	[3]	0		6
Derivative Liabilities	[3]	0		0
Other Contracts [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	[3]	68		48
Derivative Liabilities	[3]	80		58
Other Contracts [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	[3]	2		0
Derivative Liabilities	[3]	2		0
Other Contracts [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]	65		47
Derivative Liabilities	[3]	72		53
Other Contracts [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	[3]	1	[4]	1
Derivative Liabilities	[3]	6	[4]	5
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		183		182
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		183		182
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		183		182
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]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		105		43
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		105		43
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		105		43
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		19,076		15,516
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		19,076		15,516
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		19,076		15,516
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		1
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		1
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		1	[4]	1
Commercial Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale		5,999		4,766
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		5,999		4,766
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		5,999		4,766
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		586		647
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		586		647
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		586		647
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		1,204		1,451
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		1,204		1,451
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		1,200		1,450
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		$ 4	[4]	$ 1
[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]	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 December 31, 2020 and December 31, 2019, financial instruments posted of $24 million, for both periods, were not offset in the consolidated balance sheets.
[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.
[4]	All following disclosures related to Level 3 recurring and non-recurring assets do not include those deemed to be immaterial.

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		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance		$ 345	$ 418	$ 336
Gain (Loss) Included in Earnings	[1]	(157)	(115)	(29)
Purchases		$ 108	42	111
Closing Balance			$ 345	$ 418
[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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Loans Held For Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Adjustment	$ (8)	$ (12)
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	2	1
Foreclosed Property And Other Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Adjustment	$ (10)	$ (30)

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details) - Discounted Cash Flow [Member] $ in Millions	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Mortgage Servicing Rights [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 296	$ 345	$ 418
Recurring Fair Value Measurements [Member] | Residential Mortgage Servicing Rights [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average CPR	0.081	0.074	0.044
Option-Adjusted Spread	4.80%	5.20%	5.70%
Recurring Fair Value Measurements [Member] | Residential Mortgage Servicing Rights [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average CPR	0.312	0.261	0.426
Option-Adjusted Spread	9.50%	10.20%	15.00%
Recurring Fair Value Measurements [Member] | Residential Mortgage Servicing Rights [Member] | Weighted Average [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average CPR	0.156	0.120	0.090
Option-Adjusted Spread	5.60%	6.20%	7.60%

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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 1,439	$ 439
Fair Value Option Mortgages Held For Sale Aggregate Unpaid Principal	1,362	425
Aggregate Fair Value Less Aggregate Unpaid Principal	77	14
Net gains (losses) resulting from changes in fair value	$ 63	$ 4

Fair Value Measurements (Sche_3

Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($)		Dec. 31, 2020		Dec. 31, 2019
Financial Assets
Debt securities held to maturity		$ 1,215,000,000		$ 1,372,000,000
Debt securities available for sale		27,154,000,000		22,606,000,000
Other earning assets		1,217,000,000		1,518,000,000
Derivative Assets	[1],[2]	921,000,000		335,000,000
Financial Liabilities
Derivative Liabilities	[1],[2]	53,000,000		47,000,000
Fair value Discount On Loan Portfolio Amount		$ 1,200,000,000		$ 42,000,000
Fair value Discount On Loan Portfolio Rate		1.40%		0.10%
Capital Leases Carrying Amount Excluded		$ 1,500,000,000		$ 1,300,000,000
Operating Leases Carrying Amount Excluded		200,000,000		297,000,000
Recurring Fair Value Measurements [Member]
Financial Assets
Debt securities available for sale		27,154,000,000		22,606,000,000
Loans held for sale		1,446,000,000		439,000,000
Derivative Assets	[3]	3,349,000,000		1,357,000,000
Other Assets, Fair Value Disclosure		74,000,000		0
Financial Liabilities
Derivative Liabilities	[3]	1,598,000,000		817,000,000
Carrying Amount [Member]
Financial Assets
Cash and cash equivalents		17,956,000,000		4,114,000,000
Debt securities held to maturity		1,122,000,000		1,332,000,000
Debt securities available for sale		27,154,000,000		22,606,000,000
Loans held for sale		1,905,000,000		637,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses		81,597,000,000	[4],[5]	80,841,000,000	[6],[7]
Other earning assets		1,017,000,000	[8]	1,221,000,000	[9]
Derivative Assets		3,349,000,000		1,357,000,000
Other Assets, Fair Value Disclosure		74,000,000
Financial Liabilities
Derivative Liabilities		1,598,000,000		817,000,000
Deposits		122,479,000,000		97,475,000,000
Short-term Borrowings				2,050,000,000
Long-term Borrowings		3,569,000,000		7,879,000,000
Loan commitments and letters of credit		151,000,000		67,000,000
Estimate of Fair Value [Member]
Financial Assets
Cash and cash equivalents		17,956,000,000	[10]	4,114,000,000	[11]
Debt securities held to maturity		1,215,000,000	[10]	1,372,000,000	[11]
Debt securities available for sale		27,154,000,000	[10]	22,606,000,000	[11]
Loans held for sale		1,905,000,000	[10]	637,000,000	[11]
Loans (excluding leases), net of unearned income and allowance for loan losses		82,773,000,000	[4],[10]	80,799,000,000	[6],[11]
Other earning assets		1,017,000,000	[8],[10]	1,221,000,000	[9],[11]
Derivative Assets		3,349,000,000	[10]	1,357,000,000	[11]
Financial Liabilities
Derivative Liabilities		1,598,000,000	[10]	817,000,000	[11]
Deposits		122,511,000,000	[10]	97,516,000,000	[11]
Short-term Borrowings	[11]			2,050,000,000
Long-term Borrowings		4,063,000,000	[10]	8,275,000,000	[11]
Loan commitments and letters of credit		151,000,000	[10]	67,000,000	[11]
Level 1 [Member]
Financial Assets
Cash and cash equivalents		17,956,000,000		4,114,000,000
Debt securities held to maturity		0		0
Debt securities available for sale		183,000,000		182,000,000
Loans held for sale		0		0
Loans (excluding leases), net of unearned income and allowance for loan losses		0	[4]	0	[6]
Other earning assets		388,000,000	[8]	450,000,000	[9]
Derivative Assets		2,000,000		0
Financial Liabilities
Derivative Liabilities		2,000,000		0
Deposits		0		0
Short-term Borrowings				0
Long-term Borrowings		0		0
Loan commitments and letters of credit		0		0
Level 1 [Member] | Recurring Fair Value Measurements [Member]
Financial Assets
Debt securities available for sale		183,000,000		182,000,000
Loans held for sale		0		0
Derivative Assets	[3]	2,000,000		0
Other Assets, Fair Value Disclosure		0		0
Financial Liabilities
Derivative Liabilities	[3]	2,000,000		0
Level 2 [Member]
Financial Assets
Cash and cash equivalents		0		0
Debt securities held to maturity		1,215,000,000		1,372,000,000
Debt securities available for sale		26,966,000,000		22,422,000,000
Loans held for sale		1,901,000,000		620,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses		0	[4]	0	[6]
Other earning assets		629,000,000	[8]	771,000,000	[9]
Derivative Assets		3,303,000,000		1,342,000,000
Financial Liabilities
Derivative Liabilities		1,590,000,000		812,000,000
Deposits		122,511,000,000		97,516,000,000
Short-term Borrowings				2,050,000,000
Long-term Borrowings		3,592,000,000		7,442,000,000
Loan commitments and letters of credit		0		0
Level 2 [Member] | Recurring Fair Value Measurements [Member]
Financial Assets
Debt securities available for sale		26,966,000,000		22,422,000,000
Loans held for sale		1,446,000,000		436,000,000
Derivative Assets	[3]	3,303,000,000		1,342,000,000
Other Assets, Fair Value Disclosure		74,000,000		0
Financial Liabilities
Derivative Liabilities	[3]	1,590,000,000		812,000,000
Level 3 [Member]
Financial Assets
Cash and cash equivalents		0		0
Debt securities held to maturity		0		0
Debt securities available for sale		5,000,000		2,000,000
Loans held for sale		4,000,000		17,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses		82,773,000,000	[4]	80,799,000,000	[6]
Other earning assets		0	[8]	0	[9]
Derivative Assets		44,000,000		15,000,000
Financial Liabilities
Derivative Liabilities		6,000,000		5,000,000
Deposits		0		0
Short-term Borrowings				0
Long-term Borrowings		471,000,000		833,000,000
Loan commitments and letters of credit		151,000,000		67,000,000
Level 3 [Member] | Recurring Fair Value Measurements [Member]
Financial Assets
Debt securities available for sale		5,000,000	[12]	2,000,000
Loans held for sale		0		3,000,000
Derivative Assets	[3]	44,000,000	[12]	15,000,000
Other Assets, Fair Value Disclosure		0		0
Financial Liabilities
Derivative Liabilities	[3]	$ 6,000,000	[12]	$ 5,000,000
[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]	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 December 31, 2020 and December 31, 2019, financial instruments posted of $24 million, for both periods, were not offset in the consolidated balance sheets.
[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.
[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 sales-type, direct financing, and leveraged lease carrying amount of $1.3 billion at December 31, 2019.
[7]	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 discount on the loan portfolio's net carrying amount at December 31, 2019 was $42 million or 0.1 percent.
[8]	Excluded from this table is the operating lease carrying amount of $200 million at December 31, 2020.
[9]	Excluded from this table is the operating lease carrying amount of $297 million at December 31, 2019.
[10]	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.
[11]	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.
[12]	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) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total Noninterest Income		$ 2,393	$ 2,116	$ 2,019
Non-interest expense		3,643	3,489	3,570
Income from continuing operations before income taxes		1,314	1,985	1,955
Income tax expense (benefit)	[1],[2]	220	403	387
Corporate Bank [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)		1,783	1,446	1,384
Provision (credit) for credit losses	[3]	299	205	191
Total Noninterest Income		656	538	545
Non-interest expense		1,026	934	909
Income from continuing operations before income taxes		1,114	845	829
Income tax expense (benefit)		279	211	207
Net income (loss)		835	634	622
Average assets		61,237	53,867	51,530
Consumer Bank [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)		2,274	2,336	2,216
Provision (credit) for credit losses	[3]	320	340	317
Total Noninterest Income		1,266	1,214	1,146
Non-interest expense		2,046	2,107	2,066
Income from continuing operations before income taxes		1,174	1,103	979
Income tax expense (benefit)		294	276	245
Net income (loss)		880	827	734
Average assets		34,516	35,045	35,066
Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)		156	180	194
Provision (credit) for credit losses	[3]	14	16	16
Total Noninterest Income		343	330	316
Non-interest expense		346	343	334
Income from continuing operations before income taxes		139	151	160
Income tax expense (benefit)		34	37	40
Net income (loss)		105	114	120
Average assets		2,021	2,183	2,287
Other [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)		(319)	(217)	(59)
Provision (credit) for credit losses	[3]	697	(174)	(295)
Total Noninterest Income		128	34	12
Non-interest expense		225	105	261
Income from continuing operations before income taxes		(1,113)	(114)	(13)
Income tax expense (benefit)		(387)	(121)	(105)
Net income (loss)		(726)	7	92
Average assets		40,321	34,015	34,415
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)		3,894	3,745	3,735
Provision (credit) for credit losses	[3]	1,330	387	229
Total Noninterest Income		2,393	2,116	2,019
Non-interest expense		3,643	3,489	3,570
Income from continuing operations before income taxes		1,314	1,985	1,955
Income tax expense (benefit)		220	403	387
Net income (loss)		1,094	1,582	1,568
Average assets		138,095	125,110	123,298
Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)		0	0	1
Provision (credit) for credit losses	[3]	0	0	0
Total Noninterest Income		0	0	349
Non-interest expense		0	0	79
Income from continuing operations before income taxes		0	0	271
Income tax expense (benefit)		0	0	80
Net income (loss)		0	0	191
Average assets		0	0	82
Consolidated [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)		3,894	3,745	3,736
Provision (credit) for credit losses	[3]	1,330	387	229
Total Noninterest Income		2,393	2,116	2,368
Non-interest expense		3,643	3,489	3,649
Income from continuing operations before income taxes		1,314	1,985	2,226
Income tax expense (benefit)		220	403	467
Net income (loss)		1,094	1,582	1,759
Average assets		$ 138,095	$ 125,110	$ 123,380
[1]	Income tax expense includes amortization of affordable housing investments of $133 million, $131 million, and $137 million for 2020, 2019 and 2018, respectively.
[2]	The table above does not include total income tax expense from discontinued operations of zero, zero, and $80 million in 2020, 2019 and 2018, respectively. The deferred income tax expense reflected in discontinued operations was zero, zero and $43 million in 2020, 2019 and 2018, respectively
[3]	Upon adoption of CECL on January 1, 2020, the provision for credit losses presented within net interest income after provision for credit losses is the sum of the provision for loan losses and the provision for unfunded credit commitments. Prior to the adoption of CECL, the provision for unfunded commitments was included in other non-interest expense.

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees (Credit Risk Of Financial Instruments By Contractual Amounts) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Unused commitments to extend credit	$ 56,644	$ 52,976
Standby letters of credit	1,742	1,521
Commercial letters of credit	132	59
Liabilities associated with standby letters of credit	25	22
Assets associated with standby letters of credit	25	23
Reserve for unfunded credit commitments	$ 126	$ 45	$ 51	$ 53

Commitments, Contingencies an_4

Commitments, Contingencies and Guarantees (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Range of Possible Loss, Portion Not Accrued	$ 20
Long-term Purchase Commitment [Line Items]
Fannie Mae DUS Servicing Portfolio, Amount	4,500	$ 3,900
Maximum Quantifiable Fannie Mae DUS Loss Share Guarantee	1,500	1,300
Estimated Fair Value of the Fannie Mae DUS Loss Share Guarantee	5	$ 4
Loss Contingency, Range of Possible Loss, Portion Not Accrued	$ 20

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Corporate Bank [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		$ 354	$ 295	$ 286
Corporate Bank [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		152	154	145
Corporate Bank [Member] | Card and ATM fees
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		43	54	52
Corporate Bank [Member] | Investment management and trust fee income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Corporate Bank [Member] | Capital markets income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		126	69	76
Corporate Bank [Member] | Mortgage income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Corporate Bank [Member] | Investment Services Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Corporate Bank [Member] | Commercial Credit Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Corporate Bank [Member] | Bank-owned life insurance [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Corporate Bank [Member] | Securities gains, net [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Corporate Bank [Member] | Market value adjustments on employee benefit assets - defined benefit [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax			0	0
Corporate Bank [Member] | Market value adjustments on employee benefit assets - other [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Corporate Bank [Member] | Insurance commissions and fees [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax				0
Corporate Bank [Member] | Other miscellaneous income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		33	18	13
Consumer Bank [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		893	1,045	1,000
Consumer Bank [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		459	565	554
Consumer Bank [Member] | Card and ATM fees
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		385	422	404
Consumer Bank [Member] | Investment management and trust fee income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Consumer Bank [Member] | Capital markets income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Consumer Bank [Member] | Mortgage income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Consumer Bank [Member] | Investment Services Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Consumer Bank [Member] | Commercial Credit Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Consumer Bank [Member] | Bank-owned life insurance [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Consumer Bank [Member] | Securities gains, net [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Consumer Bank [Member] | Market value adjustments on employee benefit assets - defined benefit [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax			0	0
Consumer Bank [Member] | Market value adjustments on employee benefit assets - other [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Consumer Bank [Member] | Insurance commissions and fees [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax				0
Consumer Bank [Member] | Other miscellaneous income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		49	58	42
Wealth Management [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		343	331	314
Wealth Management [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		3	3	3
Wealth Management [Member] | Card and ATM fees
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	1	1
Wealth Management [Member] | Investment management and trust fee income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		253	243	235
Wealth Management [Member] | Capital markets income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Wealth Management [Member] | Mortgage income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Wealth Management [Member] | Investment Services Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		84	79	71
Wealth Management [Member] | Commercial Credit Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Wealth Management [Member] | Bank-owned life insurance [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Wealth Management [Member] | Securities gains, net [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Wealth Management [Member] | Market value adjustments on employee benefit assets - defined benefit [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax			0	0
Wealth Management [Member] | Market value adjustments on employee benefit assets - other [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Wealth Management [Member] | Insurance commissions and fees [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax				1
Wealth Management [Member] | Other miscellaneous income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		3	5	3
Other Segment Revenue [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		3	(2)	1
Other Segment Revenue [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		2	0	0
Other Segment Revenue [Member] | Card and ATM fees
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		(1)	0	(1)
Other Segment Revenue [Member] | Investment management and trust fee income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Other Segment Revenue [Member] | Capital markets income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Other Segment Revenue [Member] | Mortgage income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Other Segment Revenue [Member] | Investment Services Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Other Segment Revenue [Member] | Commercial Credit Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Other Segment Revenue [Member] | Bank-owned life insurance [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Other Segment Revenue [Member] | Securities gains, net [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Other Segment Revenue [Member] | Market value adjustments on employee benefit assets - defined benefit [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax			0	0
Other Segment Revenue [Member] | Market value adjustments on employee benefit assets - other [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Other Segment Revenue [Member] | Insurance commissions and fees [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax				3
Other Segment Revenue [Member] | Other miscellaneous income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		2	(2)	(1)
Other Revenue - Not Impacted [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	800	447	418
Other Revenue - Not Impacted [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	5	7	8
Other Revenue - Not Impacted [Member] | Card and ATM fees
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	11	(22)	(18)
Other Revenue - Not Impacted [Member] | Investment management and trust fee income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	0	0	0
Other Revenue - Not Impacted [Member] | Capital markets income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	149	109	126
Other Revenue - Not Impacted [Member] | Mortgage income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	333	163	137
Other Revenue - Not Impacted [Member] | Investment Services Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	0	0	0
Other Revenue - Not Impacted [Member] | Commercial Credit Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	77	73	71
Other Revenue - Not Impacted [Member] | Bank-owned life insurance [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	95	78	65
Other Revenue - Not Impacted [Member] | Securities gains, net [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	4	(28)	1
Other Revenue - Not Impacted [Member] | Market value adjustments on employee benefit assets - defined benefit [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]		5	(6)
Other Revenue - Not Impacted [Member] | Market value adjustments on employee benefit assets - other [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	12	11	(5)
Other Revenue - Not Impacted [Member] | Insurance commissions and fees [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]			0
Other Revenue - Not Impacted [Member] | Valuation Gain on Equity Investments [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[2]	50
Other Revenue - Not Impacted [Member] | Other miscellaneous income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]	64	51	39
Continuing Operations [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		2,393	2,116	2,019
Continuing Operations [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		621	729	710
Continuing Operations [Member] | Card and ATM fees
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		438	455	438
Continuing Operations [Member] | Investment management and trust fee income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		253	243	235
Continuing Operations [Member] | Capital markets income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		275	178	202
Continuing Operations [Member] | Mortgage income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		333	163	137
Continuing Operations [Member] | Investment Services Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		84	79	71
Continuing Operations [Member] | Commercial Credit Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		77	73	71
Continuing Operations [Member] | Bank-owned life insurance [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		95	78	65
Continuing Operations [Member] | Securities gains, net [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		4	(28)	1
Continuing Operations [Member] | Market value adjustments on employee benefit assets - defined benefit [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax			5	(6)
Continuing Operations [Member] | Market value adjustments on employee benefit assets - other [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		12	11	(5)
Continuing Operations [Member] | Insurance commissions and fees [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax				4
Continuing Operations [Member] | Valuation Gain on Equity Investments [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[2]	50
Continuing Operations [Member] | Other miscellaneous income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		151	130	96
Discontinued Operations [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	349
Discontinued Operations [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Card and ATM fees
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Investment management and trust fee income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Capital markets income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Mortgage income
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Investment Services Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Commercial Credit Fee Income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Bank-owned life insurance [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Securities gains, net [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	(1)
Discontinued Operations [Member] | Market value adjustments on employee benefit assets - defined benefit [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax			0	0
Discontinued Operations [Member] | Market value adjustments on employee benefit assets - other [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		0	0	0
Discontinued Operations [Member] | Insurance commissions and fees [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax				69
Discontinued Operations [Member] | Gain on sale of business [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[1]			281
Discontinued Operations [Member] | Valuation Gain on Equity Investments [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax	[2]	0
Discontinued Operations [Member] | Other miscellaneous income [Member]
Disaggregation of Revenue [Line Items]
RevenueFromContractWithCustomerExcludingAssessedTax		$ 0	$ 0	$ 0
[1]	(2) This revenue is not impacted by the accounting guidance adopted in 2018 and continues to be recognized when earned in accordance with the Company's prior revenue recognition policy.
[2]	In the third quarter of 2020, the equity investee executed an initial public offering. The Company was subject to a conventional post-issuance 180 day lock-up period, which prevented the sale of its position until January 2021. The Company sold its position in January 2021 and recognized an immaterial gain.

Condensed Financial Information

Condensed Financial Information Parent Company Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Interest-bearing deposits in other banks	$ 16,398,000	$ 2,516,000
Debt securities available for sale	27,154,000	22,606,000
Premises and equipment, net	1,897,000	1,960,000
Other assets	7,085,000	6,322,000
Total assets	147,389,000	126,240,000
Liabilities and Stockholder's Equity [Abstract]
Long-term borrowings	3,569,000	7,879,000
Other liabilities	3,230,000	2,541,000
Total liabilities	129,278,000	109,945,000
Equity [Abstract]
Preferred Stock, Carrying Amount	1,656,000	1,310,000
Common stock	10,000	10,000
Additional paid-in capital	12,731,000	12,685,000
Retained earnings	3,770,000	3,751,000
Treasury Stock, Value	(1,371,000)	(1,371,000)
Accumulated other comprehensive income (loss), net	1,315,000	(90,000)	$ (964,000)	$ (749,000)
Total stockholders’ equity	18,111,000	16,295,000	$ 15,090,000	$ 16,192,000
Total liabilities and stockholders’ equity	147,389,000	126,240,000
Parent Company [Member]
Assets
Interest-bearing deposits in other banks	1,526,000	1,935,000
Loans to subsidiaries	20,000	20,000
Debt securities available for sale	22,000	21,000
Premises and equipment, net	38,000	41,000
Investments in subsidiaries	19,122,000	17,146,000
Other assets	313,000	295,000
Total assets	21,041,000	19,458,000
Liabilities and Stockholder's Equity [Abstract]
Long-term borrowings	2,718,000	2,950,000
Other liabilities	212,000	213,000
Total liabilities	2,930,000	3,163,000
Equity [Abstract]
Preferred Stock, Carrying Amount	1,656,000	1,310,000
Common stock	10,000	10,000
Additional paid-in capital	12,731,000	12,685,000
Retained earnings	3,770,000	3,751,000
Treasury Stock, Value	(1,371,000)	(1,371,000)
Accumulated other comprehensive income (loss), net	1,315,000	(90,000)
Total stockholders’ equity	18,111,000	16,295,000
Total liabilities and stockholders’ equity	21,041,000	19,458,000
Parent Company [Member] | Bank [Member]
Assets
Investments in subsidiaries	18,872,000	16,939,000
Parent Company [Member] | Non-Bank [Member]
Assets
Investments in subsidiaries	$ 250,000	$ 207,000

Condensed Financial Informati_2

Condensed Financial Information Parent Company Statement of Operations (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Salaries and employee benefits		$ 2,100	$ 1,916	$ 1,947
Interest expense		368	851	602
Furniture and equipment expense		348	325	325
Income from continuing operations before income taxes		1,314	1,985	1,955
Income tax expense (benefit)	[1],[2]	220	403	387
Income from continuing operations		1,094	1,582	1,568
Income from discontinued operations before income taxes		0	0	271
Income tax expense		0	0	80
Income from discontinued operations, net of tax		0	0	191
Net income		1,094	1,582	1,759
Preferred stock dividends		(103)	(79)	(64)
Net income available to common shareholders		991	1,503	1,695
Parent Company [Member]
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries		280	1,675	2,190
Interest Income		8	4	3
Other Income		53	7	7
Total Revenues		341	1,686	2,200
Salaries and employee benefits		56	54	52
Interest expense		93	153	123
Furniture and equipment expense		4	5	4
Other Expenses		79	84	76
Operating Expenses		232	296	255
Income from continuing operations before income taxes		109	1,390	1,945
Income tax expense (benefit)		(36)	(68)	(64)
Income from continuing operations		145	1,458	2,009
Income from discontinued operations before income taxes		0	0	271
Income tax expense		0	0	80
Income from discontinued operations, net of tax		0	0	191
Income Loss Before Equity In Undistributed Earnings Loss Of Subsidiaries And Preferred Dividends		145	1,458	2,200
Equity In Undistributed Earnings Of Subsidiaries		949	124	(441)
Net income		1,094	1,582	1,759
Preferred stock dividends		(103)	(79)	(64)
Net income available to common shareholders		991	1,503	1,695
Bank [Member] | Parent Company [Member]
Equity In Undistributed Earnings Of Subsidiaries		905	110	(454)
Non-Bank [Member] | Parent Company [Member]
Equity In Undistributed Earnings Of Subsidiaries		$ 44	$ 14	$ 13
[1]	Income tax expense includes amortization of affordable housing investments of $133 million, $131 million, and $137 million for 2020, 2019 and 2018, respectively.
[2]	The table above does not include total income tax expense from discontinued operations of zero, zero, and $80 million in 2020, 2019 and 2018, respectively. The deferred income tax expense reflected in discontinued operations was zero, zero and $43 million in 2020, 2019 and 2018, respectively

Condensed Financial Informati_3

Condensed Financial Information Parent Company Statements of Cash Flow (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income	$ 1,094	$ 1,582	$ 1,759
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, amortization and accretion, net	421	426	462
Loss on early extinguishment of debt	22	16	0
Net change in operating assets and liabilities:
Other assets	(246)	(347)	171
Other liabilities	459	453	(470)
Other	103	177	37
Net cash from operating activities	2,324	2,581	2,275
Investing activities:
Proceeds from sales and maturities of debt securities available for sale	4,921	3,532	3,383
Purchases of debt securities available for sale	(8,956)	(8,102)	(3,410)
Proceeds from disposition of a business, net of cash transferred	0	0	357
Net cash from investing activities	(4,853)	509	(3,045)
Financing activities:
Net change in short-term borrowings	(2,050)	450	1,100
Proceeds from long-term borrowings	4,698	21,274	21,750
Payments on long-term borrowings	(10,918)	(25,926)	(17,451)
Cash dividends on common stock	(595)	(577)	(452)
Cash dividends on preferred stock	(103)	(79)	(64)
Proceeds from Issuance of Preferred Stock and Preference Stock	346	490
Repurchases of common stock	0	(1,101)	(2,122)
Other	(3)	0	(1)
Net cash from financing activities	16,371	(2,514)	327
Parent Company [Member]
Operating activities:
Net income	1,094	1,582	1,759
Adjustments to reconcile net income to net cash from operating activities:
Equity In Undistributed Earnings Of Subsidiaries	(949)	(124)	441
Provision for deferred income taxes	29	20	8
Depreciation, amortization and accretion, net	3	4	3
Loss on sale of assets	1	0	0
Loss on early extinguishment of debt	14	16	0
Discontinued Operation, (Gain) Loss from Disposal of Discontinued Operation, before Income Tax	0	0	(281)
Net change in operating assets and liabilities:
Other assets	3	18	(35)
Other liabilities	0	(7)	(8)
Other	44	102	23
Net cash from operating activities	239	1,611	1,910
Investing activities:
(Investment in) / repayment of investment in subsidiaries	0	(18)	146
Proceeds from sales and maturities of debt securities available for sale	4	5	8
Purchases of debt securities available for sale	(4)	(6)	(10)
Proceeds from disposition of a business, net of cash transferred	0	0	357
Net cash from investing activities	0	(19)	501
Financing activities:
Net change in short-term borrowings	0	0	(101)
Proceeds from long-term borrowings	748	500	500
Payments on long-term borrowings	1,039	751	0
Cash dividends on common stock	(595)	(577)	(452)
Cash dividends on preferred stock	(103)	(79)	(64)
Proceeds from Issuance of Preferred Stock and Preference Stock	346	490	0
Repurchases of common stock	0	(1,101)	(2,122)
Other	(5)	(2)	(2)
Net cash from financing activities	(648)	(1,520)	(2,241)
Net change in cash and cash equivalents	(409)	72	170
Cash and cash equivalents at beginning of year	1,935	1,863	1,693
Cash and cash equivalents at end of year	$ 1,526	$ 1,935	$ 1,863