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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, 2022
Dec. 31, 2021
Movement in net defined benefit assets (liabilities) [Line Items]    
Balance as at the begining of the year $ 648  
Other movements [Abstract]    
Balance as at the end of the year 432 $ 648
Fair value of plan assets [Member]    
Movement in net defined benefit assets (liabilities) [Line Items]    
Balance as at the begining of the year 648 629
Income (costs) included in profit or loss [Abstract]    
Current service costs 0 0
Interest income (expenses) 12 6
Past service cost 0 0
Effect of movements in exchange rates, net (32) 8
Included in other comprehensive income [Abstract]    
Actuarial profits (losses) deriving from changes in financial assumptions 0 0
Other actuarial gains (147) 17
Change with respect to translation differences ,net (34) (10)
Other movements [Abstract]    
Benefits received (paid) (20) (6)
Employer contribution 5 4
Balance as at the end of the year 432 648
Defined benefit obligation [Member]    
Movement in net defined benefit assets (liabilities) [Line Items]    
Balance as at the begining of the year (993) (1,075)
Income (costs) included in profit or loss [Abstract]    
Current service costs (23) (24)
Interest income (expenses) (20) (14)
Past service cost 0 12
Effect of movements in exchange rates, net 56 (16)
Included in other comprehensive income [Abstract]    
Actuarial profits (losses) deriving from changes in financial assumptions 230 68
Other actuarial gains 0  
Change with respect to translation differences ,net 43 21
Other movements [Abstract]    
Benefits received (paid) 43 35
Employer contribution 0 0
Balance as at the end of the year (664) (993)
Defined benefit obligation, net [Member]    
Movement in net defined benefit assets (liabilities) [Line Items]    
Balance as at the begining of the year (345) (446)
Income (costs) included in profit or loss [Abstract]    
Current service costs (23) (24)
Interest income (expenses) (8) (8)
Past service cost 0 12
Effect of movements in exchange rates, net 24 (8)
Included in other comprehensive income [Abstract]    
Actuarial profits (losses) deriving from changes in financial assumptions 230 68
Other actuarial gains (147) 17
Change with respect to translation differences ,net 9 11
Other movements [Abstract]    
Benefits received (paid) 23 29
Employer contribution 5 4
Balance as at the end of the year $ (232) $ (345)