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SHARE-BASED COMPENSATION PLANS AND AWARDS Part 1 (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense recognized in selling, general and administrative expense | $ 69 | $ 70 | $ 44
Share-based compensation expense, retirement eligibility preceding the requisite vesting period | $ 7 | 2 | 1
Summary of activity of stock option awards [Roll Forward] |  |  |
Number Outstanding at end of period (in shares) | 3,479,200 |  |
Weighted-Average Remaining Contractual Life (in years) | 6 years |  |
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price | $ 88 |  |
Number Exercisable at end of period (in shares) | 2,534,400 |  |
Weighted-Average Exercise Price (in dollars per share) | $ 83 |  |
Exercise price of options lower range (in dollars per share) | 61 |  |
Exercise prices of options upper range (in dollars per share) | $ 121 |  |
Exercise Prices of $61-$75 |  |  |
Summary of activity of stock option awards [Roll Forward] |  |  |
Number Outstanding at end of period (in shares) | 1,037,200 |  |
Weighted-Average Remaining Contractual Life (in years) | 5 years 2 months 12 days |  |
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price | $ 65 |  |
Number Exercisable at end of period (in shares) | 831,800 |  |
Weighted-Average Exercise Price (in dollars per share) | $ 66 |  |
Exercise price of options lower range (in dollars per share) | 61 |  |
Exercise prices of options upper range (in dollars per share) | $ 75 |  |
Exercise Prices of $76-$90 |  |  |
Summary of activity of stock option awards [Roll Forward] |  |  |
Number Outstanding at end of period (in shares) | 1,099,700 |  |
Weighted-Average Remaining Contractual Life (in years) | 5 years 3 months 18 days |  |
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price | $ 82 |  |
Number Exercisable at end of period (in shares) | 1,018,600 |  |
Weighted-Average Exercise Price (in dollars per share) | $ 82 |  |
Exercise price of options lower range (in dollars per share) | 76 |  |
Exercise prices of options upper range (in dollars per share) | $ 90 |  |
Exercise Prices of $91-$105 |  |  |
Summary of activity of stock option awards [Roll Forward] |  |  |
Number Outstanding at end of period (in shares) | 535,800 |  |
Weighted-Average Remaining Contractual Life (in years) | 5 years 2 months 12 days |  |
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price | $ 104 |  |
Number Exercisable at end of period (in shares) | 535,800 |  |
Weighted-Average Exercise Price (in dollars per share) | $ 104 |  |
Exercise price of options lower range (in dollars per share) | 91 |  |
Exercise prices of options upper range (in dollars per share) | $ 105 |  |
Exercise Prices of $106-121 |  |  |
Summary of activity of stock option awards [Roll Forward] |  |  |
Number Outstanding at end of period (in shares) | 806,500 |  |
Weighted-Average Remaining Contractual Life (in years) | 8 years 7 months 6 days |  |
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price | $ 114 |  |
Number Exercisable at end of period (in shares) | 148,200 |  |
Weighted-Average Exercise Price (in dollars per share) | $ 109 |  |
Exercise price of options lower range (in dollars per share) | 106 |  |
Exercise prices of options upper range (in dollars per share) | $ 121 |  |
Omnibus Long-Term Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Plan, term description | Eastman's 2021 Omnibus Stock Compensation Plan ("2021 Omnibus Plan") was approved by stockholders at the May 6, 2021 Annual Meeting of Stockholders and shall remain in effect until its fifth anniversary. |  |
Shares reserved and available for issuance (in shares) | 10,000,000 |  |
Shares covered by full award value per share available for issuance | $ 2.5 |  |
Grant date exercise price, minimum | exercise price not less than 100 percent of the per share fair market value on the date of the grant |  |
Director Compensation Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved and available for issuance (in shares) | 10,000,000 |  |
Term of service for shares of restricted stock to be granted to a non-employee director | Shares of restricted stock are granted on the first day of a non-employee director's initial term of service and shares of restricted stock are granted each year to each non-employee director on the date of the annual meeting of stockholders. |  |
Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense recognized in selling, general and administrative expense | $ 11 | $ 9 | $ 7
Weighted average assumptions used to determine fair value of stock options awarded [Abstract] |  |  |
Expected volatility rate (in hundredths) | 28.98% | 28.99% | 21.56%
Expected dividend yield (in hundredths) | 2.57% | 3.58% | 3.30%
Average risk-free interest rate (in hundredths) | 2.35% | 0.95% | 0.94%
Expected term years (in years) | 6 years 4 months 24 days | 6 years | 5 years 10 months 24 days
Expected dividend yield calculation basis | Company's average of the last four quarterly dividend yields |  |
Summary of activity of stock option awards [Roll Forward] |  |  |
Outstanding at beginning of period (in shares) | 3,168,500 | 3,526,600 | 3,479,300
Granted (in shares) | 443,100 | 449,700 | 622,000
Exercised (in shares) | (122,700) | (807,200) | (568,800)
Cancelled forfeited or expired (in shares) | (9,700) | (600) | (5,900)
Outstanding at end of period (in shares) | 3,479,200 | 3,168,500 | 3,526,600
Options exercisable at period-end (in shares) | 2,534,400 | 2,047,500 | 2,192,300
Available for grant at end of period (in shares) | 8,355,640 | 9,866,480 | 4,046,748
Outstanding at beginning of period (in dollars per share) | $ 84 | $ 79 | $ 80
Granted (in dollars per share) | 113 | 109 | 62
Exercised (in dollars per share) | 74 | 77 | 64
Cancelled, forfeited, or expired (in dollars per share) | 87 | 74 | 82
Outstanding at end of year (in dollars per share) | 88 | 84 | 79
Weighted average fair value of options granted (in dollars per share) | $ 26.80 | $ 19.81 | $ 7.92
Intrinsic value of options exercised | $ 6 | $ 31 | $ 14
Cash proceeds received from option exercises | 10 | 62 | 36
Tax benefit of options exercised | 1 | 5 | 2
Fair value of shares vested | $ 8 | $ 8 | 9
Stock Option [Member] | Director Compensation Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Term life of options (in years) | 10 years |  |
Vesting periods, maximum (in years) | 3 years |  |
Nonvested Options [Member] |  |  |
Summary of activity of stock option awards [Roll Forward] |  |  |
Outstanding at beginning of period (in shares) | 1,121,000 |  |
Granted (in shares) | 443,100 |  |
Vested (in shares) | (611,900) |  |
Cancelled forfeited or expired (in shares) | (7,400) |  |
Outstanding at end of period (in shares) | 944,800 | 1,121,000 |
Outstanding at beginning of period (in dollars per share) | $ 13.88 |  |
Granted (in dollars per share) | 26.80 |  |
Vested (in dollars per share) | 12.99 |  |
Cancelled, forfeited, or expired (in dollars per share) | 14.90 |  |
Outstanding at end of year (in dollars per share) | $ 20.50 | $ 13.88 |
Unrecognized compensation expense before tax for these same type awards | $ 3 |  |
Amortization life of unrecognized compensation expense before tax for these same type awards (in years) | 2 years |  |
Other Share-Based Compensation Awards [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense recognized in selling, general and administrative expense | $ 58 | $ 60 | $ 37
Summary of activity of stock option awards [Roll Forward] |  |  |
Unrecognized compensation expense before tax for these same type awards | $ 73 |  |
Amortization life of unrecognized compensation expense before tax for these same type awards (in years) | 2 years |  |

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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