SIGNIFICANT ACCOUNTING POLICIES (Notes)	3 Months Ended
SIGNIFICANT ACCOUNTING POLICIES (Notes)	Mar. 31, 2022
Significant Accounting Policies [Abstract]
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]	SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared by Eastman Chemical Company ("Eastman" or the "Company") in accordance and consistent with the accounting policies stated in the Company's 2021 Annual Report on Form 10-K, and should be read in conjunction with the consolidated financial statements in Part II, Item 8 of that report, with the exception of recently adopted accounting standards noted below. The December 31, 2021 financial position data included herein was derived from the consolidated financial statements included in the 2021 Annual Report on Form 10-K but does not include all disclosures required by accounting principles generally accepted in the United States ("GAAP"). In the opinion of management, the unaudited consolidated financial statements include all normal recurring adjustments necessary for the fair statement of the interim financial information in conformity with GAAP. These statements contain some amounts that are based upon management estimates and judgments. Future actual results could differ from such current estimates. The unaudited consolidated financial statements include assets, liabilities, sales revenue, and expenses of all majority-owned subsidiaries and joint ventures in which a controlling interest is maintained. Eastman accounts for other joint ventures and investments where it exercises significant influence on the equity basis. Intercompany transactions and balances are eliminated in consolidation. Certain prior period data has been reclassified in the unaudited consolidated financial statements and accompanying footnotes to conform to current period presentation, including sales revenue, earnings before interest and taxes ("EBIT"), and assets related to the divested rubber additives product lines and related assets and technology and the held for sale adhesives resins business. See Note 17, "Segment and Regional Sales Information" for more information. Recently Adopted Accounting Standards Accounting Standards Update ("ASU") 2021-05 Leases - Lessors - Certain Leases with Variable Lease Payments (Topic 842): On January 1, 2022 Eastman adopted this update which is a part of the Financial Accounting Standards Board's ("FASB") post-implementation review of this Topic. The update provides that lessors should classify and account for a lease with variable lease payments that do not depend on a reference index or a rate as an operating lease if both: the lease would have been classified as a sales-type lease or a direct financing lease and the lessor would have otherwise recognized a day-one loss. The adoption does not have significant impact on the Company's financial statements and related disclosures. ASU 2021-10 Government Assistance - Disclosures by Business Entities about Government Assistance (Topic 832): On January 1, 2022 Eastman adopted prospectively this amendment which requires business entities that account for transactions with a government by applying a grant or contribution model by analogy (for example, a grant model within International Financial Reporting Standards) to provide annual disclosures about government assistance recorded during the period. The adoption does not have significant impact on the Company's financial statements and related disclosures. Accounting Standards Issued But Not Adopted as of March 31, 2022 ASU 2022-01 Derivatives and Hedging (Topic 815): Fair Value Hedging –Portfolio Layer Method: The FASB issued this update in March of 2022. This ASU clarifies the guidance in ASC 8152 on fair value hedge accounting of interest rate risk for portfolios of financial assets. This ASU amends the guidance in ASU 2017-123 (released on August 28, 2017) that, among other things, established the "last-of-layer" method for making the fair value hedge accounting for these portfolios more accessible. ASU 2022-01 renames that method the "portfolio layer" method and addresses feedback from stakeholders regarding its application. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods within those years. Management does not expect that changes required by the new standard will have a significant impact the Company's financial statements and related disclosures. ASU 2022-02 Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures: This ASU updates the requirements for accounting for credit losses under ASC 326, eliminates the accounting guidance on troubled debt restructurings for creditors in ASC 310-40, and enhances creditors' disclosure requirements related to loan refinancings and restructurings for borrowers experiencing financial difficulty. This ASU also amends the guidance on "vintage disclosures" to require disclosure of gross write-offs by year of origination. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods within those years. Management does not expect that changes required by the new standard will have a significant impact the Company's financial statements and related disclosures. ASU 2021-08 Business Combinations - Accounting for Contract Assets and Contract Liabilities from Contracts with Customers (Topic 805): The FASB issued this update in October 2021, which requires that an entity (acquirer) recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606 Revenue from Contracts with Customers, as if it had originated the contracts. The update also provides certain practical expedients for acquirers and is applicable to all contract assets and liabilities within the scope of Topic 606. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods within those years. Early adoption is permitted, including adoption in an interim period. Adoption is on a prospective basis to business combinations occurring on or after the initial application and if adopted early, retrospectively to all business combinations for which the acquisition date occurs on or after the beginning of the fiscal year that includes the interim period of early application. Management does not expect that changes required by the new standard will have a significant impact the Company's financial statements and related disclosures. Working Capital Management and Off Balance Sheet Arrangements The Company has an off balance sheet, uncommitted accounts receivable factoring program under which entire invoices may be sold, without recourse, to third-party financial institutions. Under these agreements, the Company sells the invoices at face value, less a transaction fee, which substantially equals the carrying value and fair value with no gain or loss recognized, and no credit loss exposure is retained. Available capacity under these agreements, which the Company uses as a routine source of working capital funding, is dependent on the level of accounts receivable eligible to be sold and the financial institutions' willingness to purchase such receivables. In addition, certain agreements also require that the Company continue to service, administer, and collect the sold accounts receivable at market rates. The total amounts sold under the program in first quarter 2022 and 2021 were $502 million and $289 million, respectively.