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Employee Benefits (Movement in Net Defined Benefit Assets Liabilities and in their Components) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Movement in net defined benefit assets (liabilities) [Line Items]    
Balance as at the begining of the year $ 432  
Other movements:    
Balance as at the end of the year 453 $ 432
Fair value of plan assets [Member]    
Movement in net defined benefit assets (liabilities) [Line Items]    
Balance as at the begining of the year 432 648
Income (costs) included in profit or loss:    
Current service costs 0 0
Interest income (expenses) 20 12
Past service cost 0 0
Effect of movements in exchange rates, net (6) (32)
Included in other comprehensive income:    
Actuarial profits (losses) deriving from changes in financial assumptions 0 0
Other actuarial gains 8 (147)
Change with respect to translation differences, net 12 (34)
Other movements:    
Benefits received (paid) (19) (20)
Employer contribution 6 5
Balance as at the end of the year 453 432
Defined benefit obligation [Member]    
Movement in net defined benefit assets (liabilities) [Line Items]    
Balance as at the begining of the year (664) (993)
Income (costs) included in profit or loss:    
Current service costs (15) (23)
Interest income (expenses) (31) (20)
Past service cost (1) 0
Effect of movements in exchange rates, net 10 56
Included in other comprehensive income:    
Actuarial profits (losses) deriving from changes in financial assumptions 24 230
Other actuarial gains 0 0
Change with respect to translation differences, net (15) 43
Other movements:    
Benefits received (paid) 39 43
Employer contribution 0 0
Balance as at the end of the year (653) (664)
Defined benefit obligation, net [Member]    
Movement in net defined benefit assets (liabilities) [Line Items]    
Balance as at the begining of the year (232) (345)
Income (costs) included in profit or loss:    
Current service costs (15) (23)
Interest income (expenses) (11) (8)
Past service cost (1) 0
Effect of movements in exchange rates, net 4 24
Included in other comprehensive income:    
Actuarial profits (losses) deriving from changes in financial assumptions 24 230
Other actuarial gains 8 (147)
Change with respect to translation differences, net (3) 9
Other movements:    
Benefits received (paid) 20 23
Employer contribution 6 5
Balance as at the end of the year $ (200) $ (232)