Other (Income)/Deductions—Net - Schedule of Other (Income)/Deductions—Net (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 27, 2026 |
Sep. 28, 2025 |
Sep. 27, 2026 |
Sep. 28, 2025 |
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| Other Income and Expenses [Abstract] | ||||||||||||||||
| Interest income | $ (108) | $ (138) | $ (336) | $ (437) | ||||||||||||
| Interest expense | 662 | 652 | 1,998 | 1,960 | ||||||||||||
| Net interest expense | 554 | 514 | 1,662 | 1,523 | ||||||||||||
| Net (gains)/losses on asset disposals | (132) | (2) | (150) | (91) | ||||||||||||
| Net (gains)/losses recognized during the period on equity securities | [1] | 75 | (201) | 121 | 94 | |||||||||||
| Income from collaborations, out-licensing arrangements and sales of compound/product rights | (111) | (45) | (165) | (82) | ||||||||||||
| Net periodic benefit costs/(credits) other than service costs | (103) | (73) | (258) | (333) | ||||||||||||
| Certain legal matters, net | [2] | 13 | 191 | 1,047 | 755 | |||||||||||
| Certain asset impairments | [3] | 0 | 260 | 4,325 | 577 | |||||||||||
| Net gain from the sale of investment in ViiV | [4] | 0 | 0 | (1,870) | 0 | |||||||||||
| Changes in fair value of contingent consideration liabilities | [5] | 159 | 15 | 709 | 57 | |||||||||||
| Other, net | [6] | (167) | (141) | (556) | (291) | |||||||||||
| Other (income)/deductions––net | $ 288 | $ 517 | $ 4,866 | $ 2,210 | ||||||||||||
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