v3.26.1
Segmental reporting (Details) - GBP (£)
£ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disclosure of operating segments [line items]      
Net interest income £ 7,658 £ 7,022  
Non-interest income 8,843 7,874  
Total income 16,501 14,896  
Operating costs (8,873) (8,407)  
UK regulatory levies (84) (96)  
Litigation and conduct (108) (87)  
Operating expenses (9,065) (8,590)  
Other net income 24 9  
Profit before impairment 7,460 6,315  
Credit impairment (charges)/releases (1,394) (1,112) £ (2,279)
Profit before tax 6,066 5,203  
Total assets 1,730,358   1,544,165
Total liabilities 1,650,547   1,465,929
Operating segments | Barclays UK      
Disclosure of operating segments [line items]      
Net interest income 3,986 3,677  
Non-interest income 531 516  
Total income 4,517 4,193  
Operating costs (2,368) (2,283)  
UK regulatory levies (44) (43)  
Litigation and conduct 0 (29)  
Operating expenses (2,412) (2,355)  
Other net income 0 0  
Profit before impairment 2,105 1,838  
Credit impairment (charges)/releases (338) (237)  
Profit before tax 1,767 1,601  
Total assets 304,900   299,600
Total liabilities 287,500   280,300
Operating segments | Barclays UK Corporate Bank      
Disclosure of operating segments [line items]      
Net interest income 807 701  
Non-interest income 281 302  
Total income 1,088 1,003  
Operating costs (488) (474)  
UK regulatory levies (15) (24)  
Litigation and conduct 0 (39)  
Operating expenses (503) (537)  
Other net income 0 0  
Profit before impairment 585 466  
Credit impairment (charges)/releases (19) (31)  
Profit before tax 566 435  
Total assets 75,600   71,300
Total liabilities 107,900   103,700
Operating segments | Barclays Private Bank and Wealth Management      
Disclosure of operating segments [line items]      
Net interest income 420 407  
Non-interest income 293 290  
Total income 713 697  
Operating costs (521) (472)  
UK regulatory levies (3) (2)  
Litigation and conduct 0 0  
Operating expenses (524) (474)  
Other net income 0 0  
Profit before impairment 189 223  
Credit impairment (charges)/releases (3) 11  
Profit before tax 186 234  
Total assets 44,200   41,900
Total liabilities 81,800   80,400
Operating segments | Barclays Investment Bank      
Disclosure of operating segments [line items]      
Net interest income 794 631  
Non-interest income 7,192 6,549  
Total income 7,986 7,180  
Operating costs (4,306) (3,993)  
UK regulatory levies (22) (27)  
Litigation and conduct 2 (11)  
Operating expenses (4,326) (4,031)  
Other net income 0 0  
Profit before impairment 3,660 3,149  
Credit impairment (charges)/releases (323) (139)  
Profit before tax 3,337 3,010  
Total assets 1,250,200   1,072,400
Total liabilities 1,132,100   965,900
Operating segments | Barclays US Consumer Bank      
Disclosure of operating segments [line items]      
Net interest income 1,555 1,318  
Non-interest income 564 369  
Total income 2,119 1,687  
Operating costs (822) (803)  
UK regulatory levies 0 0  
Litigation and conduct (2) (3)  
Operating expenses (824) (806)  
Other net income 0 0  
Profit before impairment 1,295 881  
Credit impairment (charges)/releases (713) (711)  
Profit before tax 582 170  
Total assets 32,800   34,600
Total liabilities 25,600   25,400
Head Office      
Disclosure of operating segments [line items]      
Net interest income 96 288  
Non-interest income (18) (152)  
Total income 78 136  
Operating costs (368) (382)  
UK regulatory levies 0 0  
Litigation and conduct (108) (5)  
Operating expenses (476) (387)  
Other net income 24 9  
Profit before impairment (374) (242)  
Credit impairment (charges)/releases 2 (5)  
Profit before tax (372) (247)  
Total assets 22,700   24,400
Total liabilities 15,600   £ 10,200
Of which inter-segmental income/(expense)      
Disclosure of operating segments [line items]      
Total income 76 (3)  
Of which inter-segmental income/(expense) | Barclays UK      
Disclosure of operating segments [line items]      
Total income (44) 1  
Of which inter-segmental income/(expense) | Barclays UK Corporate Bank      
Disclosure of operating segments [line items]      
Total income 770 985  
Of which inter-segmental income/(expense) | Barclays Private Bank and Wealth Management      
Disclosure of operating segments [line items]      
Total income 888 915  
Of which inter-segmental income/(expense) | Barclays Investment Bank      
Disclosure of operating segments [line items]      
Total income (1,681) (1,895)  
Of which inter-segmental income/(expense) | Barclays US Consumer Bank      
Disclosure of operating segments [line items]      
Total income £ (9) £ (3)