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Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail)
$ in Millions
 6 Months Ended
Jun. 30, 2021
USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance $ 5,279
Ending Balance 5,178
Currency Translation Adjustments [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance (1,481)
Accumulated other comprehensive income (loss) before reclassifications 18
Amounts reclassified from accumulated other comprehensive income (loss) 0
Ending Balance (1,463)
Derivative Financial Instruments, Net of Tax [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance 19
Accumulated other comprehensive income (loss) before reclassifications (3)
Amounts reclassified from accumulated other comprehensive income (loss) (3)
Ending Balance 13
Defined Benefit Plans, Net of Tax [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance (47)
Accumulated other comprehensive income (loss) before reclassifications 0
Amounts reclassified from accumulated other comprehensive income (loss) 0
Ending Balance (47)
Accumulated Other Comprehensive Income (Loss) [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance (1,509)
Accumulated other comprehensive income (loss) before reclassifications 15
Amounts reclassified from accumulated other comprehensive income (loss) (3)
Ending Balance $ (1,497)