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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 | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Other Comprehensive Income |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | $ 87 |  | $ 151 |  | $ (115) | $ (379)
Other Comprehensive Income | Net Investment Hedging [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | 0 | [1] | 0 | [1] | 0 | (21)
Financial expenses [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | 274 |  | 223 |  | 564 | 448
Financial expenses [Member] | Net Investment Hedging [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | $ 0 | [1] | $ 0 | [1] | $ 0 | $ (2)
[1] | 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.

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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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