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Performance B.4. People (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) employee | Dec. 31, 2019 USD ($) employee | Dec. 31, 2018 USD ($) employee
Number of permanent employees: |  |  |
Continuing operations (employees) | employee | 16,955,000 | 17,687,000 | 16,725,000
Joint ventures (Guatemala, Honduras and Ghana) (employees) | employee | 4,464,000 | 4,688,000 | 4,416,000
Discontinued operations (employees) | employee | 0 | 0 | 262,000
Total (employees) | employee | 21,419,000 | 22,375,000 | 21,403,000
Classes of employee benefits expense: |  |  |
Wages and salaries | $ (356) | $ (358) | $ (346)
Social security | (66) | (68) | (60)
Share based compensation | (24) | (27) | (21)
Pension and other long-term benefit costs | (4) | (4) | (7)
Other employees related costs | (27) | (39) | (67)
Total | $ (477) | $ (496) | $ (500)

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