v3.26.1
Results of associates and joint ventures (Details)
£ in Millions, $ in Millions, $ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
May 28, 2025
shares
May 31, 2026
GBP (£)
May 31, 2026
USD ($)
Feb. 28, 2026
GBP (£)
Feb. 28, 2026
CAD ($)
Jun. 30, 2026
GBP (£)
Jun. 30, 2025
GBP (£)
Dec. 31, 2025
Disclosure of associates [abstract]                  
Share of post-tax results of associates and joint ventures             £ 189 £ 1,474  
Reported at CC                  
Disclosure of associates [abstract]                  
Share of post-tax results of associates and joint ventures               £ 211  
Decrease in share of profit (loss) of associates and joint ventures               (8.90%)  
ITC Hotels Limited                  
Disclosure of associates [abstract]                  
Percentage interest in investments             6.30%    
ITC Ltd.                  
Disclosure of associates [abstract]                  
Adjustments for gain on disposal of investments in subsidiaries, joint ventures and associates               £ 904  
Number of shares of associate disposed of (in shares) | shares   313,000,000              
Gains (losses) on disposals of investments             £ 1 £ 3  
Ownership interest in associates             22.90%   22.91%
ITC Ltd. | ITC Hotels Limited                  
Disclosure of associates [abstract]                  
Share of profit (loss) of associates relating to gain on demerger             £ 333    
Organigram Inc                  
Disclosure of associates [abstract]                  
Ownership interest in associates 48.70%       36.77% 36.77%      
Proportion of voting rights held in associate 30.00%       30.00% 30.00%      
Percentage of voting equity interests acquired         12.00% 12.00%      
Purchase of interests in associates         £ 35 $ 65      
Sanity Group GmbH (Sanity)                  
Disclosure of associates [abstract]                  
Ownership interest in associates         16.32% 16.32%      
Charlotte’s Web Holdings                  
Disclosure of associates [abstract]                  
Purchase of interests in associates     £ 7 $ 10