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Derivative Instruments and Hedging Activities - Summary of Pre-tax (Gains) Losses From Derivatives Not Designated in as Hedging Instruments (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Net Revenues [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  | $ (4,480) | $ (4,332) | $ (12,547) | $ (12,315)
Net Revenues [Member] | Not Designated as Hedging Instrument, Trading [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [1] | 0 | 0 | 0 | 0
Net Revenues [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [2] | (9) | 9 | 51 | (1)
Financial expenses [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  | 237 | 272 | 714 | 763
Financial expenses [Member] | Not Designated as Hedging Instrument, Trading [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [1] | 4 | 4 | 8 | (33)
Financial expenses [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [2] | $ 0 | $ 0 | $ 0 | $ 0
[1] | Teva uses foreign exchange contracts (mainly option and forward contracts) to hedge balance sheet items from currency exposure. These foreign exchange contracts are not designated as hedging instruments for accounting purposes. In connection with these foreign exchange contracts, Teva recognizes gains or losses that offset the revaluation of the balance sheet items also recorded under financial expenses, net.
[2] | Teva entered into option and forward contracts designed to limit the exposure of foreign exchange fluctuations on projected revenues and expenses recorded in euro, Swiss franc, British pound, Russian ruble, Canadian dollar, Polish złoty, new Israeli shekel, Indian rupee and some other currencies to protect its projected operating results for 2025 and 2026. These derivative instruments do not meet the criteria for hedge accounting, however, they are accounted for as an economic hedge. These derivative instruments, which may include hedging transactions of future projected revenues and expenses, are recognized on the balance sheet at their fair value on a quarterly basis, while the foreign exchange impact on the underlying revenues and expenses may occur in subsequent quarters. In the three months ended September 30, 2025, the positive impact from these derivatives recognized under revenues was $9 million. In the three months ended September 30, 2024, the negative impact from these derivatives recognized under revenues was $9 million. In the nine months ended September 30, 2025, the negative impact from these derivatives recognized under revenues was $51 million. In the nine months ended September 30, 2024, the positive impact from these derivatives recognized under revenues was $1 million. Changes in the fair value of the derivative instruments are recognized in the same line item in the statements of income as the underlying exposure being hedged. Cash flows associated with these derivatives are reflected as cash flows from operating activities in the consolidated statements of cash flows.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
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