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Tax - Summary of Reconciliation of Tax Paid to Total Current Tax Charge in Income Statement (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Reconciliation Of Tax Paid [abstract]      
Current tax charge in the Group income statement $ 273 $ 176 $ 143
Current tax credit in the Group statement of comprehensive income (6) (2)  
Current tax credit taken directly to equity (5)    
Total current tax charge 262 174 143
Movements to tax contingencies (2) 10 (4)
Timing differences of cash tax paid and foreign exchange differences (17) 27 (53)
Tax paid per cash flow $ 243 $ 211 $ 86