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Risks Arising from Financial Instruments - Summary of Foreign Exchange Risk on Operating Activities (Detail) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Euro to Canadian Dollar [member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure $ (44) $ (52)
Total hedges 35 39
Open position (9) (13)
Euro to Mexican Peso [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (119) (151)
Total hedges 85 156
Open position (34) 5
Euro to Pound Sterling [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (135) (126)
Total hedges 101 124
Open position (34) (2)
Euro to South African Rand [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (83) (99)
Total hedges 66 95
Open position (17) (4)
Euro to South Korean Won [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (31) (49)
Total hedges 40 46
Open position 9 (3)
Euro to US Dollar [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (340) (409)
Total hedges 299 337
Open position (41) (72)
Mexican peso to Euro [member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (145) (178)
Total hedges 133 161
Open position (12) (17)
Pound Sterling to Euro [member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (40) (39)
Total hedges 37 40
Open position (3) 1
US dollar to Argentinian peso [member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (539) (531)
Total hedges 494 510
Open position (45) (21)
US Dollar to Australian Dollar [member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure 0 (216)
Total hedges 0 204
Open position 0 (12)
US Dollar to Bolivian Boliviano [member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (59) (69)
Total hedges 66 70
Open position 7 1
US Dollar to Brazilian Real [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (1,410) (1,443)
Total hedges 1,258 1,447
Open position (152) 4
US Dollar to Canadian Dollar [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (340) (287)
Total hedges 268 295
Open position (72) 8
US Dollar to Chilean Peso [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (109) (109)
Total hedges 103 102
Open position (6) (7)
US Dollar to Chinese Yuan [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (198) (230)
Total hedges 194 191
Open position (4) (39)
US Dollar to Colombian Peso [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (306) (278)
Total hedges 272 272
Open position (34) (6)
US Dollar to Euro [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (81) (108)
Total hedges 104 113
Open position 23 5
US Dollar to Mexican Peso [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (986) (1,105)
Total hedges 852 903
Open position (134) (202)
US Dollar to Paraguayan Guarani [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (120) (124)
Total hedges 119 130
Open position (1) 6
US Dollar to Peruvian Nuevo Sol [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (249) (243)
Total hedges 189 205
Open position (60) (38)
US Dollar to South African Rand [member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (108) (28)
Total hedges 48 31
Open position (60) 3
US Dollar to South Korean Won [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (65) (88)
Total hedges 84 99
Open position 19 11
US Dollar to Uruguayan Peso [Member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (41) (41)
Total hedges 39 41
Open position (2)  
Other currency [member]    
Disclosure Of Foreign Currency Exchange Exposure [line items]    
Total exposure (188) (317)
Total hedges 171 250
Open position $ (17) $ (67)