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Segment Reporting - Reconciliation of Segment Profits to Income before Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Profits | $ 6,006 | $ (5,335) | $ 11,675 | $ (1,685)
Interest income | 69 | 109 | 141 | 221
Interest expense | (310) | (277) | (613) | (519)
Amortization |  |  | (1,087) | (1,020)
Depreciation |  |  | (1,029) | (874)
Research and development | (3,500) | (13,321) | (7,492) | (17,597)
Restructuring costs | (80) | (151) | (202) | (218)
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Profits | 11,708 | 10,321 | 23,168 | 20,025
Operating Segments | Pharmaceutical segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Profits | 11,200 | 9,854 | 22,104 | 18,993
Operating Segments | Animal Health segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Profits | 508 | 467 | 1,064 | 1,032
Corporate, Non-Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Profits | 129 | 19 | 274 | 184
Interest income | 69 | 109 | 141 | 221
Interest expense | (310) | (277) | (613) | (519)
Amortization | (614) | (477) | (1,087) | (1,020)
Depreciation | (450) | (376) | (902) | (775)
Research and development | (3,360) | (13,194) | (7,209) | (17,341)
Restructuring costs | (80) | (151) | (202) | (218)
Charge for Zetia antitrust litigation settlements | 0 | 0 | 0 | (573)
Other unallocated, net | $ (1,086) | $ (1,309) | $ (1,895) | $ (1,669)

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