v3.20.4
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.