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Consolidated Statement of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of comprehensive income [abstract]      
Group profit for the financial year $ 2,621 $ 1,165 $ 1,738
Items that may be reclassified to profit or loss in subsequent years:      
Currency translation effects (338) 440 472
Gains relating to cash flow hedges 34 7 27
Tax relating to cash flow hedges (8) 0 (4)
Other comprehensive income that will be reclassified to profit or loss net of tax (312) 447 495
Items that will not be reclassified to profit or loss in subsequent years:      
Remeasurement of retirement benefit obligations 264 (33) (19)
Tax relating to retirement benefit obligations (36) 11 (4)
Other comprehensive income that will not be reclassified to profit or loss net of tax 228 (22) (23)
Total other comprehensive income for the financial year (84) 425 472
Total comprehensive income for the financial year 2,537 1,590 2,210
Attributable to:      
Equity holders of the Company 2,516 1,515 2,174
Non-controlling interests 21 75 36
Total comprehensive income for the financial year $ 2,537 $ 1,590 $ 2,210