v3.25.4
Related Undertakings (Details)
12 Months Ended
Dec. 31, 2025
United Kingdom | Intelligent Processing Solutions Limited  
Disclosure of subsidiaries [line items]  
Proportion of ownership interest held in significant investments 19.50%
United Kingdom | Barclays Secured Funding (LM) Limited  
Disclosure of subsidiaries [line items]  
Proportion of ownership interest in associate 20.00%
United Kingdom | Barclays Secured Notes Finance LLP  
Disclosure of subsidiaries [line items]  
Proportion of ownership interest in associate 20.00%
United Kingdom | Equistone Founder Partner III L.P.  
Disclosure of subsidiaries [line items]  
Proportion of ownership interest in associate 20.00%
Korea, Republic of | Woori BC Pegasus Securitization Specialty Co. Ltd  
Disclosure of subsidiaries [line items]  
Proportion of ownership interest in subsidiary 70.00%
Luxembourg | Barclays Alzin Investments S.à r.l.  
Disclosure of subsidiaries [line items]  
Proportion of ownership interest in subsidiary 100.00%
Luxembourg | Barclays Bordang Investments S.à r.l.  
Disclosure of subsidiaries [line items]  
Proportion of ownership interest in subsidiary 100.00%
Netherlands | Cube Solidus B.V.  
Disclosure of subsidiaries [line items]  
Proportion of ownership interest in subsidiary 68.83%