v3.25.4
Financial Liabilities - Borrowings - Summary of Current and Non - Current Borrowings (Parenthetical) (Detail)
€ in Millions, £ in Millions
12 Months Ended
Dec. 31, 2025
GBP (£)
Dec. 31, 2024
GBP (£)
Dec. 31, 2025
EUR (€)
May 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Disclosure of detailed information about borrowings [line items]          
Nominal amount £ 1,531 £ 3,130      
1.375% Euro notes 2025 [member]          
Disclosure of detailed information about borrowings [line items]          
Borrowings, interest rate 1.375% 1.375% 1.375% 1.375% 1.375%
Borrowings, maturity year 2025 2025      
Nominal amount | €     € 300 € 300 € 300
3.75% GBP notes 2030 [member]          
Disclosure of detailed information about borrowings [line items]          
Borrowings, interest rate 3.75% 3.75% 3.75%   3.75%
Borrowings, maturity year 2030 2030      
Nominal amount £ 350 £ 350      
5.375% GBP notes 2034 [member]          
Disclosure of detailed information about borrowings [line items]          
Borrowings, interest rate 5.375% 5.375% 5.375%   5.375%
Borrowings, maturity year 2034 2034      
Nominal amount £ 350 £ 350