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Performance B.4. People (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
employee
Dec. 31, 2020
USD ($)
employee
Dec. 31, 2019
USD ($)
employee
Number of permanent employees:      
Continuing operations (employees) | employee 19,749,000 16,955,000 17,687,000
Joint ventures (Guatemala, Honduras and Ghana) (employees) | employee 938,000 4,464,000 4,688,000
Discontinued operations (employees) | employee 0 0 0
Total (employees) | employee 20,687,000 21,419,000 22,375,000
Classes of employee benefits expense:      
Wages and salaries $ (383) $ (356) $ (358)
Social security (71) (66) (68)
Share based compensation (17) (24) (27)
Pension and other long-term benefit costs (6) (4) (4)
Other employees related costs (27) (27) (39)
Total $ (503) $ (477) $ (496)