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Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance $ (2,399)  
Net other comprehensive income (loss) after tax in respect of actuarial benefits [1]   $ (377)
Ending Balance (2,620)  
Foreign Currency Translation Adjustments [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance (1,919) (1,794)
Other comprehensive income (loss) before reclassifications (270) (418)
Net other comprehensive income (loss) before tax (270) (418)
Corresponding income tax 26 41
Net other comprehensive income (loss) after tax in respect of actuarial benefits [2] (244)  
Ending Balance (2,163) (2,171)
Derivative Financial Instruments [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance (363) (420)
Other comprehensive income (loss) before reclassifications   20
Amounts reclassified to the statements of income 27 26
Net other comprehensive income (loss) before tax 27 46
Corresponding income tax (6)  
Net other comprehensive income (loss) after tax in respect of actuarial benefits 21 [2] 46 [1]
Ending Balance (342) (374)
Benefit Plans [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance (117) (98)
Amounts reclassified to the statements of income 2  
Net other comprehensive income (loss) before tax 2  
Net other comprehensive income (loss) after tax in respect of actuarial benefits [2] 2  
Ending Balance (115) (98)
AOCI Attributable to Parent [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance (2,399) (2,312)
Other comprehensive income (loss) before reclassifications (270) (398)
Amounts reclassified to the statements of income 29 26
Net other comprehensive income (loss) before tax (241) (372)
Corresponding income tax 20 41
Net other comprehensive income (loss) after tax in respect of actuarial benefits (221) [2] (331) [1]
Ending Balance $ (2,620) $ (2,643)
[1] Amounts do not include a $29 million gain from foreign currency translation adjustments attributable to non-controlling interests.
[2] Amounts do not include a $81 million loss from foreign currency translation adjustments attributable to non-controlling interests.