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Revenue from Contracts with Customers - Schedule of Sales Reserves and Allowances (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Revenue Recognition [Line Items]    
Balance at beginning of period $ 4,309 $ 4,904
Provisions related to sales made in current year period 13,278 13,808
Provisions related to sales made in prior periods (202) (318)
Credits and payments (13,513) (14,036)
Translation differences (55) (49)
Balance at end of period 3,817 4,309
Reserves Included in Accounts Receivable, Net [Member]    
Revenue Recognition [Line Items]    
Balance at beginning of period 68 80
Provisions related to sales made in current year period 363 382
Provisions related to sales made in prior periods 0 (9)
Credits and payments (364) (385)
Translation differences 0 0
Balance at end of period 67 68
Rebates [Member]    
Revenue Recognition [Line Items]    
Balance at beginning of period 1,655 2,054
Provisions related to sales made in current year period 3,823 4,030
Provisions related to sales made in prior periods (69) (125)
Credits and payments (3,798) (4,275)
Translation differences (36) (29)
Balance at end of period 1,575 1,655
Medicaid and Other Governmental Allowances [Member]    
Revenue Recognition [Line Items]    
Balance at beginning of period 854 828
Provisions related to sales made in current year period 871 852
Provisions related to sales made in prior periods (35) (51)
Credits and payments (1,023) (768)
Translation differences (4) (7)
Balance at end of period 663 854
Chargebacks [Member]    
Revenue Recognition [Line Items]    
Balance at beginning of period 1,085 1,108
Provisions related to sales made in current year period 7,819 7,967
Provisions related to sales made in prior periods (44) (47)
Credits and payments (7,861) (7,937)
Translation differences (8) (6)
Balance at end of period 991 1,085
Returns [Member]    
Revenue Recognition [Line Items]    
Balance at beginning of period 535 686
Provisions related to sales made in current year period 317 263
Provisions related to sales made in prior periods (3) (60)
Credits and payments (390) (350)
Translation differences (4) (4)
Balance at end of period 455 535
Other [Member]    
Revenue Recognition [Line Items]    
Balance at beginning of period 112 148
Provisions related to sales made in current year period 85 314
Provisions related to sales made in prior periods (51) (26)
Credits and payments (77) (321)
Translation differences (3) (3)
Balance at end of period 66 112
Total Reserves Included in Sales Reserves and Allowances [Member]    
Revenue Recognition [Line Items]    
Balance at beginning of period 4,241 4,824
Provisions related to sales made in current year period 12,915 13,426
Provisions related to sales made in prior periods (202) (309)
Credits and payments (13,149) (13,651)
Translation differences (55) (49)
Balance at end of period $ 3,750 $ 4,241