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Revenue from Contracts with Customers - Schedule of Sales Reserves and Allowances (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Revenue Recognition [Line Items] |  |
Balance at beginning of period | $ 3,817 | $ 4,309
Provisions related to sales made in current year period | 3,178 | 3,170
Provisions related to sales made in prior periods | (47) | (87)
Credits and payments | (3,589) | (3,518)
Translation differences | 13 | (5)
Balance at end of period | 3,372 | 3,869
Reserves Included in Accounts Receivable, net [Member] |  |
Revenue Recognition [Line Items] |  |
Balance at beginning of period | 67 | 68
Provisions related to sales made in current year period | 80 | 82
Provisions related to sales made in prior periods |  | 0
Credits and payments | (84) | (88)
Translation differences |  | 0
Balance at end of period | 63 | 62
Rebates [Member] |  |
Revenue Recognition [Line Items] |  |
Balance at beginning of period | 1,575 | 1,655
Provisions related to sales made in current year period | 1,003 | 928
Provisions related to sales made in prior periods | (7) | (90)
Credits and payments | (1,127) | (1,037)
Translation differences | 8 | (3)
Balance at end of period | 1,452 | 1,453
Medicaid and other governmental allowances [Member] |  |
Revenue Recognition [Line Items] |  |
Balance at beginning of period | 663 | 854
Provisions related to sales made in current year period | 142 | 198
Provisions related to sales made in prior periods | (36) | 26
Credits and payments | (289) | (270)
Translation differences | 2 | (1)
Balance at end of period | 482 | 807
Chargebacks [Member] |  |
Revenue Recognition [Line Items] |  |
Balance at beginning of period | 991 | 1,085
Provisions related to sales made in current year period | 1,855 | 1,814
Provisions related to sales made in prior periods | (9) | (8)
Credits and payments | (1,973) | (1,940)
Translation differences | 2 | 0
Balance at end of period | 866 | 951
Returns [Member] |  |
Revenue Recognition [Line Items] |  |
Balance at beginning of period | 455 | 535
Provisions related to sales made in current year period | 73 | 58
Provisions related to sales made in prior periods | 6 | (14)
Credits and payments | (95) | (110)
Translation differences | 1 | 0
Balance at end of period | 440 | 469
Other [Member] |  |
Revenue Recognition [Line Items] |  |
Balance at beginning of period | 66 | 112
Provisions related to sales made in current year period | 25 | 90
Provisions related to sales made in prior periods | (1) | (1)
Credits and payments | (21) | (73)
Translation differences |  | (1)
Balance at end of period | 69 | 127
Total reserves included in sales reserves and allowances [Member] |  |
Revenue Recognition [Line Items] |  |
Balance at beginning of period | 3,750 | 4,241
Provisions related to sales made in current year period | 3,098 | 3,088
Provisions related to sales made in prior periods | (47) | (87)
Credits and payments | (3,505) | (3,430)
Translation differences | 13 | (5)
Balance at end of period | $ 3,309 | $ 3,807

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