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Acquisitions and Divestiture - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 6 Months Ended
May 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Estimated goodwill recognized   $ 768 $ 665
Loews Hotels And Co [Member]      
Proceeds from sale of hotels $ 127    
Plastic Packaging Manufacturers Business Acquisition [Member]      
Payments for acquisition   260  
Consolidated Container [Member]      
Debt financing proceeds   250  
Consolidated Container [Member] | Plastic Packaging Manufacturers Business Acquisition [Member]      
Estimated goodwill recognized   102  
Consolidated Container [Member] | Plastic Packaging Manufacturers Business Acquisition [Member] | Customer Relationships [Member]      
Estimated intangible assets recognized   $ 89