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Group employees (Tables)
12 Months Ended
Dec. 31, 2024
Number and average number of employees [abstract]  
Summary of Average Number of Persons Employed by Group and Associates
2024
Number
2023
Number
U.S.
4,021
3,861
AME
31,090
32,948
APMEA
13,098
13,030
Subsidiary undertakings
48,209
49,839
Associates
26,408
25,613
74,617
75,452