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Income Taxes - Accumulated Other Comprehensive Income/(Loss) (Net of Tax) (Parenthetical) (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2018
Income Before Income Taxes And Income Tax Expense Benefit [Line Items] |  |
Income before income taxes includes goodwill impairment tax effect | $ 0 | $ 0

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- Definition Income before income taxes and income tax expense benefit. + References No definition available. + Details
Name: | teva_IncomeBeforeIncomeTaxesAndIncomeTaxExpenseBenefitLineItems
Namespace Prefix: | teva_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_IncomeTaxReconciliationOtherAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration