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Revenue from Contracts with Customers - Schedule of Sales Reserves and Allowances (Detail) $ in Millions | 6 Months Ended
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Jun. 30, 2019 USD ($)
Revenue Recognition [Line Items] |
Balance at beginning of period | $ 6,886
Provisions related to sales made in current year period | 8,656
Provisions related to sales made in prior periods | 1
Credits and payments | (9,294)
Translation differences | 12
Balance at end of period | 6,261
Reserves Included in Accounts Receivable, Net [Member] |
Revenue Recognition [Line Items] |
Balance at beginning of period | 175
Provisions related to sales made in current year period | 229
Credits and payments | (242)
Balance at end of period | 162
Rebates [Member] |
Revenue Recognition [Line Items] |
Balance at beginning of period | 3,006
Provisions related to sales made in current year period | 2,651
Provisions related to sales made in prior periods | 7
Credits and payments | (2,975)
Translation differences | 4
Balance at end of period | 2,693
Medicaid and Other Governmental Allowances [Member] |
Revenue Recognition [Line Items] |
Balance at beginning of period | 1,361
Provisions related to sales made in current year period | 548
Credits and payments | (739)
Balance at end of period | 1,170
Chargebacks [Member] |
Revenue Recognition [Line Items] |
Balance at beginning of period | 1,530
Provisions related to sales made in current year period | 4,822
Provisions related to sales made in prior periods | (5)
Credits and payments | (4,936)
Translation differences | 2
Balance at end of period | 1,413
Returns [Member] |
Revenue Recognition [Line Items] |
Balance at beginning of period | 638
Provisions related to sales made in current year period | 148
Provisions related to sales made in prior periods | 3
Credits and payments | (196)
Translation differences | 2
Balance at end of period | 595
Other [Member] |
Revenue Recognition [Line Items] |
Balance at beginning of period | 176
Provisions related to sales made in current year period | 213
Provisions related to sales made in prior periods | (4)
Credits and payments | (206)
Translation differences | 4
Balance at end of period | 183
Total Reserves Included in Sales Reserves and Allowances [Member] |
Revenue Recognition [Line Items] |
Balance at beginning of period | 6,711
Provisions related to sales made in current year period | 8,427
Provisions related to sales made in prior periods | 1
Credits and payments | (9,052)
Translation differences | 12
Balance at end of period | $ 6,054

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