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Goodwill - Summary of Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Goodwill [Line Items] |  |  |  |
Beginning balance | $ 17,177 |  | $ 17,177 | [1]
Goodwill allocation related to the shift of Canada to International Markets |  |  | 0 |
Goodwill reclassified as assets held for sale | (48) |  |  |
Translation differences | (122) |  |  |
Ending balance | 17,007 | [1] | 17,177 |
North America [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance | 0 |  | 6,459 | [1]
Goodwill allocation related to the shift of Canada to International Markets |  |  | (6,459) |
Goodwill reclassified as assets held for sale | 0 |  |  |
Translation differences | 0 |  |  |
Ending balance | 0 | [1] | 0 |
Europe [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance | 8,466 |  | 8,466 | [1]
Goodwill allocation related to the shift of Canada to International Markets |  |  | 0 |
Goodwill reclassified as assets held for sale | 0 |  |  |
Translation differences | (104) |  |  |
Ending balance | 8,362 | [1] | 8,466 |
International Markets [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance | 1,321 |  | 675 | [1]
Goodwill allocation related to the shift of Canada to International Markets |  |  | 646 |
Goodwill reclassified as assets held for sale | (48) |  |  |
Translation differences | 6 |  |  |
Ending balance | 1,279 | [1] | 1,321 |
Other [Member] | Medis Reporting Units [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance | 265 |  | 265 | [1]
Goodwill allocation related to the shift of Canada to International Markets |  |  | 0 |
Goodwill reclassified as assets held for sale | 0 |  |  |
Translation differences | (10) |  |  |
Ending balance | 255 | [1] | 265 |
Other [Member] | Tevas API Reporting Unit [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance | 1,313 |  | 1,313 | [1]
Goodwill allocation related to the shift of Canada to International Markets |  |  | 0 |
Goodwill reclassified as assets held for sale | 0 |  |  |
Translation differences | (14) |  |  |
Ending balance | 1,299 | [1] | 1,313 |
United States [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance | 5,813 |  | 0 | [1]
Goodwill allocation related to the shift of Canada to International Markets |  |  | 5,813 |
Goodwill reclassified as assets held for sale | 0 |  |  |
Translation differences | 0 |  |  |
Ending balance | $ 5,813 | [1] | $ 5,813 |
[1] | Cumulative goodwill impairment as of March 31, 2024 and December 31, 2023 was approximately $28.3 billion.

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