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Derivative Instruments and Hedging Activities - Information Regarding The Location And Amount Of Pretax (Gains) Losses Of Derivatives Designated In Fair Value Or Cash Flow Hedging Relationships (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | [1] | Dec. 31, 2017 | [1]
Other Comprehensive Income |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  | $ (30) | $ 160 | $ (585) |
Other Comprehensive Income | Cash Flow Hedging [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [2] | 0 | (33) | (35) |
Other Comprehensive Income | Net Investment Hedging [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [3] | (21) | (22) | (51) |
Other Comprehensive Income | Fair Value Hedging [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [4] | 0 | 0 | $ 0 |
Financial expenses [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  | 834 | 822 |  | $ 959
Financial expenses [Member] | Cash Flow Hedging [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [2] | 0 | (2) |  | (2)
Financial expenses [Member] | Net Investment Hedging [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [3] | (2) | (29) |  | $ (31)
Financial expenses [Member] | Fair Value Hedging [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | [4] | $ 0 | $ 2 |  |
[1] | Comparative figures are based on prior hedge accounting standard.
[2] | With respect to cross-currency swap agreements, Teva recognized gains which mainly reflect the differences between the fixed interest rate and the floating interest rate. In the fourth quarter of 2019, Teva terminated $588 million in cross-currency swap agreements against its outstanding 3.65% senior notes maturing in November 2021. The settlement of these transactions resulted in cash proceeds of $95 million. The cash flow hedge accounting adjustments of these instruments, which are recorded under senior notes and loans, are amortized under financial expenses, net over the life of the debt as additional interest expense.
[3] | In each of the first and second quarters of 2017, Teva entered into a cross currency swap agreement with a notional amount of $500 million maturing in 2020. These cross currency swaps were designated as a net investment hedge of Teva’s foreign subsidiaries euro denominated net assets, in order to reduce the risk of adverse exchange rate fluctuations. With respect to these cross currency swap agreements, Teva recognized gains which mainly reflect the differences between the float-for-float interest rates paid and received. In the first quarter of 2020, these cross-currency swap agreements expired. The settlement of these transactions resulted in cash proceeds of $3 million.
[4] | In the fourth quarter of 2016, Teva entered into an interest rate swap agreement designated as fair value hedge relating to its 2.8% senior notes due 2023 with respect to $500 million notional amount of outstanding debt. With respect to this interest rate swap agreement, Teva recognized a loss which mainly reflects the differences between the fixed interest rate and the floating interest rate. In the third quarter of 2019, Teva terminated this interest rate swap agreement. The settlement of these transactions resulted in a gain position of $10 million. The fair value hedge accounting adjustments of these instruments, which are recorded under senior notes and loans, are amortized under financial expenses, net over the life of the debt as additional interest expense.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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