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Goodwill and Intangible Assets - Additional Information (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Brand
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Goodwill and Intangible Assets Disclosure [Line Items]          
Amortization expense for intangible assets $ 44   $ 44 $ 88 $ 88
Estimated amortization expense in year 1 175     175  
Estimated amortization expense in year 2 175     175  
Estimated amortization expense in year 3 175     175  
Estimated amortization expense in year 4 175     175  
Estimated amortization expense in year 5 85     85  
Goodwill, Divestitures 23     23  
Intangible Assets, Divestitures 62     62  
Goodwill, Acquisition 12     12  
Intangible asset impairment 38     38  
Number of brands | Brand   5      
Intangible asset, aggregate book value $ 17,465 $ 17,004   $ 17,465  
Trademarks          
Goodwill and Intangible Assets Disclosure [Line Items]          
Intangible asset impairment   98      
Intangible asset, aggregate book value   $ 630      
Weighted Average          
Goodwill and Intangible Assets Disclosure [Line Items]          
Life of our amortizable intangible assets (in years)       13 years 7 months 6 days