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Legal Settlements and Loss Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Loss Contingencies [Line Items]          
Legal settlements and loss contingencies, expense $ 13 $ 646   $ 703  
Legal settlements, income     $ 12    
Accrued amount for legal settlements and loss contingencies 1,588   $ 1,588   $ 1,580
Payments for Legal Settlements   $ 85      
Opioid Litigation [Member]          
Loss Contingencies [Line Items]          
Legal settlements and loss contingencies, expense $ 85        
Settlement On Account Of Product Liability [Member] | United States [Member]          
Loss Contingencies [Line Items]          
Restructuring expense and income     The expense in the second quarter of 2020 was mainly due to the increase of a reserve for certain legal expenses and settlement contributions related to products liability claims in the United States, partially offset by proceeds received following a settlement of the FCPA derivative proceedings in Israel.