Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2019
Recently adopted and issued accounting pronouncements	Recently adopted accounting pronouncements In June 2018, the FASB issued ASU 2018-07 “Improvement to Nonemployee Share-Based Payments Accounting.” This guidance simplifies the accounting for non-employee share-based payment transactions. The amendments specify that ASC 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor’s own operations by issuing share-based payment awards. Teva adopted the provisions of this update as of January 1, 2019 with no material impact on its consolidated financial statements. In August 2017, the FASB issued ASU 2017-12 “Derivatives and Hedging—Targeted Improvements to Accounting for Hedging Activities.” This guidance expands and refines hedge accounting for both non-financial and financial risk components and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Teva adopted the provisions of this update as of January 1, 2019 with no material impact on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02 “Leases.” The guidance establishes a right-of-use model (“ROU”) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases are classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The guidance became effective on January 1, 2019. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. Teva adopted the new accounting standard ASC 842 “Leases” and all the related amendments on January 1, 2019 and used the effective date as Teva’s date of initial application. Consequently, financial information was not updated and the disclosures required under the new standard are not provided for dates and periods before January 1, 2019. The new standard provides a number of optional practical expedients in transition. Teva did not elect the ‘package of practical expedients’, which permits the Company not to reassess its prior conclusions regarding lease identification, lease classification and initial direct costs under the new standard. However, the Company did elect the practical expedient pertaining to the use-of hindsight. The new standard also provides practical expedients for an entity’s ongoing accounting. Teva elected the short-term lease recognition exemption for all leases with a term shorter than 12 months. This means, for those leases, Teva does not recognize ROU assets or lease liabilities, including not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. Teva also elected the practical expedient to not separate lease and non-lease components for all of Teva’s leases, other than leases of real estate. Additionally, following the adoption of the new Lease Standard and in subsequent measurements, Teva applies the portfolio approach to account for the operating lease ROU assets and liabilities for certain car leases and incremental borrowing rates. The adoption of this standard has a material effect on Teva’s financial statements. The most significant impact is reflected in: (i) effective as of January 1, 2019, the recognition of approximately $553 million ROU assets and $561 million lease liabilities on Teva’s balance sheet for its operating leases of real estate, vehicles and equipment (the difference between the additional lease assets and lease liabilities did not have material impact on the retained earnings), and (ii) the requirement to provide significant new disclosures regarding Teva’s leasing activities and to enable users of financial statements to assess the amount, timing and uncertainty of cash flows arising from leases. However, the adoption of this standard does not have a material impact on Teva’s consolidated statements of income and consolidated statements of cash flows. Also, the Company’s accounting for finance leases remained substantially unchanged. See note 20 for further discussion. Recently issued accounting pronouncements, not yet adopted In April 2019, the FASB issued ASU 2019-04 “Codification Improvements to Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Financial Instruments (Topic 825).” This ASU provides clarifications for three topics related to financial instruments accounting. The guidance will be effective for fiscal years beginning after December 15, 2019. The Company is currently evaluating this guidance to determine the impact it may have on its consolidated financial statements. In November 2018, the FASB issued ASU 2018-18 “Collaborative Arrangements (Topic 808)—Clarifying the interaction between Topic 808 and Topic 606.” The amendments provide guidance on whether certain transactions between collaborative arrangement participants should be accounted for as revenue under ASC 606. It also specifically (i) addresses when the participant should be considered a customer in the context of a unit of account, (ii) adds unit-of-account guidance in ASC 808 to align with guidance in ASC 606 and (iii) precludes presenting revenue from a collaborative arrangement together with revenue recognized under ASC 606 if the collaborative arrangement participant is not a customer. The guidance will be effective for fiscal years beginning after December 15, 2019. Early adoption is permitted and should be applied retrospectively. The Company is currently evaluating this guidance to determine the impact it may have on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-15 “Intangibles—Goodwill and other—Internal-use software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This guidance aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The guidance will be effective for fiscal years beginning after December 15, 2019, although early adoption is permitted. The Company is currently evaluating this guidance to determine the impact it may have on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-13 “Fair Value Measurement (Topic 820)—Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement.” This guidance removes certain disclosure requirements related to the fair value hierarchy, modifies existing disclosure requirements related to measurement uncertainty and adds new disclosure requirements. The new disclosure requirements include disclosing the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Certain disclosures required by this guidance must be applied on a retrospective basis and others on a prospective basis. The guidance will be effective for fiscal years beginning after December 15, 2019, although early adoption is permitted. The Company is currently evaluating this guidance to determine the impact it may have on its consolidated financial statements. In June 2016, the FASB issued ASU 2016-13 “Financial Instruments—Credit Losses—Measurement of Credit Losses on Financial Instruments.” This guidance replaces the current incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The guidance will be effective for the fiscal year beginning on January 1, 2020, including interim periods within that year. Teva is currently evaluating the potential effect of the guidance on its consolidated financial statements.
Reclassifications	Reclassifications of prior periods During the fourth quarter of 2018, the Company changed its accounting policy for the presentation of royalty payments to third parties that are not involved in the production of products. Teva previously accounted for royalty payments to such third parties as S&M expenses. Royalties paid to a party that is involved in the production process are classified as cost of sales. The Company believes this change in accounting policy is preferable in order to be aligned with industry practice of classifying all royalty payments related to currently marketed products in cost of sales. The Company now reports all royalty payments as cost of sales. The Company has retrospectively adjusted prior periods to reflect this change and the impact of the change for the first , second and thir d quarters of 2018 was an increase in cost of sales of $33 million , $28 million a nd $ 44 million , respectively, with a corresponding decrease in S&M expenses.