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Pensions and Post-Employment Benefits - Schedule Actuarial Results Related to Pension and Other Post Retirement Benefits (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Recorded in operating costs and expenses      
Service cost $ 11 $ 10 $ 11
Past service cost 0 0 1
Settlements, curtailments and other changes 0 (10) 2
Total defined benefit expense 11 0 14
Recorded in other financial expenses      
Net interest cost 40 44 28
Recorded in other comprehensive income      
Actuarial (gains) losses for the period (74) 45 (176)
Total (loss) / gain recognized during the period (23) 89 (134)
Pension defined benefit plans [member]      
Recorded in operating costs and expenses      
Service cost 7 6 7
Past service cost 0 0 1
Settlements, curtailments and other changes 0 (9) 2
Total defined benefit expense 7 (3) 10
Recorded in other financial expenses      
Net interest cost 32 36 22
Recorded in other comprehensive income      
Actuarial (gains) losses for the period (75) 46 (166)
Total (loss) / gain recognized during the period (36) 79 (134)
Other Benefits Plans [Member]      
Recorded in operating costs and expenses      
Service cost 4 4 4
Past service cost 0 0 0
Settlements, curtailments and other changes 0 (1) 0
Total defined benefit expense 4 3 4
Recorded in other financial expenses      
Net interest cost 8 8 6
Recorded in other comprehensive income      
Actuarial (gains) losses for the period 1 (1) (10)
Total (loss) / gain recognized during the period $ 13 $ 10 $ 0