Name:	ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of Bid offer represents the fair value positions are adjusted to bid (long positions) or offer (short positions) levels, by marking individual cash positions directly to bid or offer or by taking bid-offer reserves calculated on a portfolio basis for derivatives exposures.

No definition available.

Name:	nwg_BidOfferAdjustments
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of Credit valuation adjustments represent an estimate of the adjustment to fair value that a market participant would make to incorporate the counterparty credit risk inherent in derivative exposures.

No definition available.

Name:	nwg_CreditValuationAdjustments
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of financial instruments in the trading book, adjustments are made to mid-market valuations to cover bid-offer spread, liquidity and credit risk.

No definition available.

Name:	nwg_FinancialInstrumentsValuationAdjustments
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of Funding valuation adjustments represents an estimate of the adjustment to fair value that a market participant would make to incorporate funding costs and benefits that arise in relation to uncollateralised derivative exposures

No definition available.

Name:	nwg_FundingValuationAdjustments
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The gains (losses) on financial assets and liabilities at fair value carried forward upon initial recognition.

No definition available.

Name:	nwg_GainsLossesOnFinancialAssetsAndLiabilitiesAtFairValueCarriedForwardUponInitialRecognition
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The gains (losses) on financial assets and liabilities at fair value deferred upon initial recognition.

No definition available.

Name:	nwg_GainsLossesOnFinancialAssetsAndLiabilitiesAtFairValueDeferredUponInitialRecognition
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The gains (losses) on financial assets and liabilities at fair value through profit or loss that were designated as such upon initial recognition.

No definition available.

Name:	nwg_GainsLossesOnFinancialAssetsAndLiabilitiesAtFairValueThroughProfitOrLossDesignatedAsUponInitialRecognition
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

Name:	nwg_ProductAndDealSpecificAbstract
Namespace Prefix:	nwg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of product and deal specific adjustment in financial instruments valuation.

No definition available.