The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2020-01-01
-Paragraph B67
-Subparagraph d
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-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2020-01-01
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Segmental analysis - Goodwill (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Analysis of goodwill
Carrying value of goodwill	£ 5,607
Retail Banking
Analysis of goodwill
Carrying value of goodwill	2,692
Commercial and Private Banking (CPB)
Analysis of goodwill
Carrying value of goodwill		£ 2,600
Commercial Banking
Analysis of goodwill
Carrying value of goodwill	2,606
Private Banking
Analysis of goodwill
Carrying value of goodwill	9
RBS International
Analysis of goodwill
Carrying value of goodwill	£ 300	£ 300