ACQUISITIONS, DIVESTITURES, LICENSING AND OTHER ARRANGEMENTS - Divestitures (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||
| Net Proceeds | $ 1,139 | $ 1,056 | $ 858 |
| Divestiture (Gains)/Losses | 1 | 15 | 0 |
| Royalty Income | (1,129) | (1,104) | (862) |
| Diabetes business - royalties | |||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||
| Net Proceeds | 1,125 | 1,051 | 846 |
| Divestiture (Gains)/Losses | 0 | 0 | 0 |
| Royalty Income | (1,121) | (1,097) | (862) |
| Mature products and other | |||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||
| Net Proceeds | 14 | 5 | 12 |
| Divestiture (Gains)/Losses | 1 | 15 | 0 |
| Royalty Income | $ (8) | $ (7) | $ 0 |