v3.22.0.1
Derivative Financial Instruments And Hedging Activities (Schedule Of Derivative Instruments Notional And Fair Values) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 138,062 $ 128,614
Estimated Fair Value, Gain [1] 1,111 3,349
Estimated Fair Value, Loss [1] 1,012 1,598
Derivative Asset, Fair Value of Derivative Contracts Offset in Accordance with Entity's Policy that were Offset Under Master Netting Agreements [1],[2] 699 2,428
Derivative Liability, Fair Value of Derivative Contracts Offset In Accordance with Policy Election that were Offset Under Master Netting Agreements [1],[2] 932 1,545
Derivative Asset [1],[3] 412 921
Derivative Liability [1],[3] 80 53
Cash Flow Hedge Floor Premium   83
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value 9,200 10,300
Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 28,550 23,850
Estimated Fair Value, Gain [1] 171 1,688
Estimated Fair Value, Loss [1] 61 0
Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 109,512 104,764
Estimated Fair Value, Gain [1] 940 1,661
Estimated Fair Value, Loss [1] 951 1,598
Interest Rate Swaps [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Instrument, Accrued Interest 12 28
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 81,327 76,764
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Gain [1] 748 1,492
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Loss [1] 794 1,464
Interest Rate Floor [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Instrument, Accrued Interest   12
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 15,990 13,806
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Gain [1] 48 90
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Loss [1] 19 28
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 2,739 4,270
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 11
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] 3 26
Other Contract [Member] | Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 9,456 9,924
Other Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Gain [1] 133 68
Other Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Loss [1] 135 80
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 7,900 2,100
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] 0 77
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Loss [1] 32 0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 20,650 21,750
Estimated Fair Value, Gain [1] 171 1,611
Estimated Fair Value, Loss [1] 29 0
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 20,650 16,000
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] 171 1,181
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Loss [1] 29 0
Cash Flow Hedging [Member] | Interest Rate Floor [Member] | Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount [4] 0 5,750
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] 0 430
Cash Flow Hedging [Member] | Interest Rate Floor [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Estimated Fair Value, Loss [1],[4] 0 0
US Treasury Securities [Member]    
Derivatives, Fair Value [Line Items]    
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value $ 0 $ 24
[1] Derivatives in a gain position are recorded as other assets and derivatives in a loss position are recorded as other liabilities.(2)Includes accrued interest of $12 million as of December 31, 2021 and $28 million at December 31, 2020, respectively.(3)Includes accrued interest of $12 million and
[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, 2021, there were no financial instruments posted that were not offset in the consolidated balance sheets, compared to $24 million as of December 31, 2020.
[4] premium of approximately $83 million at December 31, 2020.