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

The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 25
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_25&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_FinancialLiabilitiesAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The gains (losses) recognised in profit or loss for liabilities measured at fair value that are attributable to the change in unrealised gains or losses relating to those liabilities held at the end of the reporting period. [Refer: At fair value [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2025-01-01
-Paragraph 93
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_f&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_GainsLossesRecognisedInProfitOrLossAttributableToChangeInUnrealisedGainsOrLossesForLiabilitiesHeldAtEndOfPeriodFairValueMeasurement
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The gains (losses) excluding exchange differences, recognised in profit or loss, on the fair value measurement of liabilities. [Refer: At fair value [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 13
-IssueDate 2025-01-01
-Paragraph 93
-Subparagraph e
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_e_i&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

The increase in the fair value measurement of liabilities resulting from purchases of those liabilities. [Refer: At fair value [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2025-01-01
-Paragraph 93
-Subparagraph e
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_e_iii&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_PurchasesFairValueMeasurementLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The decrease in the fair value measurement of liabilities resulting from sales. [Refer: At fair value [member]]

Name:	ifrs-full_SalesFairValueMeasurementLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The decrease in the fair value measurement of liabilities resulting from settlements. [Refer: At fair value [member]]

Name:	ifrs-full_SettlementsFairValueMeasurementLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of transfers of liabilities into Level 3 of the fair value hierarchy. [Refer: Level 3 of fair value hierarchy [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2025-01-01
-Paragraph 93
-Subparagraph e
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_e_iv&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_TransfersIntoLevel3OfFairValueHierarchyLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of transfers of liabilities out of Level 3 of the fair value hierarchy. [Refer: Level 3 of fair value hierarchy [member]]

Name:	ifrs-full_TransfersOutOfLevel3OfFairValueHierarchyLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The increase (decrease) in the fair value measurement of liabilities resulting from foreign exchange and other adjustments.

No definition available.

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

The amount of gains (losses) on assets and liabilities held at fair value through profit or loss and related derivatives.

No definition available.

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

Name:	ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis=nwg_OtherOperatingIncomeAndInterestIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis=nwg_IncomeFromTradingActivitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_MeasurementAxis=ifrs-full_AtFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialLiabilitiesAxis=ifrs-full_DerivativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialLiabilitiesAxis=nwg_OtherTradingLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: