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Tax - Summary of Reconciliation of Tax Paid to Total Current Tax Charge in Income Statement (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Major components of tax expense (income) [abstract]      
Current tax charge in the Group income statement $ 320 $ 316 $ 273
Current tax charge/(credit) in the Group statement of comprehensive income 2 (3) (6)
Current tax credit taken directly to equity (15) (6) (5)
Total current tax charge 307 307 262
Movements to tax contingencies (1) (4) (2)
Timing differences of cash tax paid and foreign exchange differences 1 6 (17)
Total tax paid (net of refunds) in respect of operating activities $ 307 $ 309 $ 243