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Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2016 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019
Derivative [Line Items] |  |  |  |  |  |  |
Revenues other than USD | 47.00% |  |  | 47.00% |  |  |
Notional amount hedge debt | $ 500 |  |  | $ 500 |  |  |
Teva other comprehensive loss |  |  |  | 493 |  |  |
Forward starting interest rate swaps and treasury lock agreements losses | 8 | $ 8 |  | 16 | $ 16 |  |
Interest Rate Swap Gain | 1 | 1 |  | 1 | 2 |  |
Gain from currency swap | 1 | $ 1 |  | 1 | 2 |  |
Cash received on settlement of position | $ 3 |  |  | 3 |  |  |
Cost of sales [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative, Gain on Derivative |  |  |  | $ 13 | $ 27 |  |
Senior Notes Due 2023 Two [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Notional amount hedge debt |  |  | $ 3,000 |  |  |  | $ 500
Previously hedge debt rate |  |  |  |  |  |  | 2.80%
Cash received on settlement of position |  |  |  |  |  |  | $ 10
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss) |  |  | 41 |  |  |  |
Senior Notes Due 2022 [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Notional amount hedge debt |  |  | $ 844 |  |  |  |
Previously hedge debt rate |  |  | 2.95% |  |  |  |
Senior Notes Due 2021 [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Notional amount hedge debt |  |  | $ 450 |  |  | $ 588 |
Previously hedge debt rate |  |  | 3.65% |  |  | 3.65% |
Cash received on settlement of position |  |  |  |  |  | $ 95 |

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