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Financial expenses-net - Schedule of Financial Expenses (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Expenses [Line Items]      
Venezuela devaluation [1] $ 0 $ 0 $ 42
Interest expenses and other bank charges 881 920 875
Income from investments (41) (39) (84)
Foreign exchange (gains) losses—net (15) 13 65
Other, net [2] (4) 65 (3)
Total finance expense—net $ 822 $ 959 $ 895
[1] For further information regarding the Venezuela devaluation, refer to note 1a.
[2] In 2018 Other, net comprised mainly of a make-whole payment of $46 million following early redemption of senior notes during 2018.