Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

No definition available.

+ Details

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

- Definition

The amount of the estimated financial effect of contingent liabilities. [Refer: Contingent liabilities [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 37
-IssueDate 2021-01-01
-Paragraph 86
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_86_a&doctype=Standard
-URIDate 2021-03-24

+ Details

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

- Definition

The amount of contingent liabilities and the amount of future expenditures that the entity is committed to make.

+ References

No definition available.

+ Details

Name:	nwg_ContingentLiabilitiesAndCommitments
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of standby facilities, credit lines and other commitments.

+ References

No definition available.

+ Details

Name:	nwg_StandbyFacilitiesCreditLinesAndOtherCommitments
Namespace Prefix:	nwg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanThreeYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanThreeYearsAndNotLaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfContingentLiabilitiesAxis=ifrs-full_ContingentLiabilityForGuaranteesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfContingentLiabilitiesAxis=ifrs-full_OtherContingentLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Memorandum items - Contingent liabilities and commitments (Details) - GBP (£) £ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Contingent liabilities and commitments
Standby facilities, credit lines and other commitments	£ 121,308	£ 124,167
Contingent liabilities and commitments	125,367	128,732	£ 124,995
Not later than one year [member]
Contingent liabilities and commitments
Standby facilities, credit lines and other commitments	60,029
Contingent liabilities and commitments	62,027
More than 1 year but less than 3 years
Contingent liabilities and commitments
Standby facilities, credit lines and other commitments	26,775
Contingent liabilities and commitments	27,531
More than 3 years but less than 5 years
Contingent liabilities and commitments
Standby facilities, credit lines and other commitments	27,136
Contingent liabilities and commitments	27,374
After 5 years
Contingent liabilities and commitments
Standby facilities, credit lines and other commitments	7,368
Contingent liabilities and commitments	8,435
The Financial Services Compensation Scheme
Contingent liabilities and commitments
Estimated net exposure	2,055	2,244
The Financial Services Compensation Scheme \| Not later than one year [member]
Contingent liabilities and commitments
Estimated net exposure	993
The Financial Services Compensation Scheme \| More than 1 year but less than 3 years
Contingent liabilities and commitments
Estimated net exposure	321
The Financial Services Compensation Scheme \| More than 3 years but less than 5 years
Contingent liabilities and commitments
Estimated net exposure	195
The Financial Services Compensation Scheme \| After 5 years
Contingent liabilities and commitments
Estimated net exposure	546
Other contingent liabilities
Contingent liabilities and commitments
Estimated net exposure	2,004	£ 2,321
Other contingent liabilities \| Not later than one year [member]
Contingent liabilities and commitments
Estimated net exposure	1,005
Other contingent liabilities \| More than 1 year but less than 3 years
Contingent liabilities and commitments
Estimated net exposure	435
Other contingent liabilities \| More than 3 years but less than 5 years
Contingent liabilities and commitments
Estimated net exposure	43
Other contingent liabilities \| After 5 years
Contingent liabilities and commitments
Estimated net exposure	£ 521