Derivative Notional Amount, Entered in Period

No definition available.

Name:	emn_DerivativeNotionalAmountEnteredInPeriod
Namespace Prefix:	emn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Derivative Notional Amount, Settled in Period

+ References

No definition available.

+ Details

Name:	emn_DerivativeNotionalAmountSettledInPeriod
Namespace Prefix:	emn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-11

+ Details

Name:	us-gaap_AociLossCashFlowHedgeCumulativeGainLossAfterTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-5A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal number of units used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Nominal or face amount used to calculate payments on a nonderivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_NotionalAmountOfNonderivativeInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 182
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-182

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-11

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480627/815-20-45-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 10A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, before tax, of increase (decrease) in the cumulative translation adjustment from gain (loss) on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 20
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481694/830-30-45-20

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 830
-SubTopic 20
-Name Accounting Standards Codification
-Section 35
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482014/830-20-35-3

+ Details

Name:	us-gaap_TranslationAdjustmentForNetInvestmentHedgeIncreaseDecreaseGrossOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

DERIVATIVE AND NON-DERIVATIVE FINANCIAL INSTRUMENTS Part 1 (Details) € in Millions, ¥ in Millions, MMBTU in Millions, $ in Millions	3 Months Ended			6 Months Ended					12 Months Ended
	Jun. 30, 2026 USD ($) MMBTU	Mar. 31, 2026 EUR (€)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) MMBTU	Jun. 30, 2026 EUR (€)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 EUR (€)	Jun. 30, 2025 JPY (¥)	Dec. 31, 2025 USD ($) MMBTU	Jun. 30, 2026 EUR (€) MMBTU	Jun. 30, 2026 JPY (¥) MMBTU	Dec. 31, 2025 EUR (€) MMBTU	Dec. 31, 2025 JPY (¥) MMBTU
Derivative [Line Items]
Unrealized Gains (Losses) on Derivative Instruments	$ (9)			$ (9)					$ (28)
Unrealized gain (loss) during period	$ 3		$ (43)	$ 24		$ (60)
Foreign Exchange Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount \| €										€ 297		€ 357
Energy Related Derivative [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount \| MMBTU	11			11					9	11	11	9	9
Cross Currency Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivatives used in Net Investment Hedge, Increase (Decrease), Gross of Tax						(2)
1.50% Notes Due 2023 and 1.875% Notes Due 2026 [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Notional Amount of Nonderivative Instruments		€ 499		$ 569	€ 500				$ 586
3.8% notes due March 2025 [Member] \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche Two
Derivative [Line Items]
Derivative Notional Amount, Settled in Period \| €							€ 351
3.8% notes due March 2025 [Member] \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche Two
Derivative [Line Items]
Derivative Notional Amount, Settled in Period						375
3.8% notes due March 2025 [Member] \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche One
Derivative [Line Items]
Derivative Notional Amount, Settled in Period						50
3.8% notes due March 2025 [Member] \| Cross Currency Interest Rate Contract [Member] \| Japan, Yen \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche One
Derivative [Line Items]
Derivative Notional Amount, Settled in Period \| ¥								¥ 7,400
4.5% Notes Due Dec 2028 [Member] \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Settled in Period \| €							229
Derivative Notional Amount, Entered in Period \| €							236
4.5% Notes Due Dec 2028 [Member] \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche Three
Derivative [Line Items]
Derivative Notional Amount, Entered in Period \| €							48
4.5% Notes Due Dec 2028 [Member] \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Settled in Period						245
Derivative Notional Amount, Entered in Period						245
4.5% Notes Due Dec 2028 [Member] \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche Two
Derivative [Line Items]
Derivative Notional Amount, Entered in Period						50
4.5% Notes Due Dec 2028 [Member] \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche Three
Derivative [Line Items]
Derivative Notional Amount, Entered in Period						50
4.5% Notes Due Dec 2028 [Member] \| Cross Currency Interest Rate Contract [Member] \| Japan, Yen \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche Two
Derivative [Line Items]
Derivative Notional Amount, Entered in Period \| ¥								¥ 7,900
5.75% Notes Due March 2033 \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Settled in Period \| €							282
Derivative Notional Amount, Entered in Period \| €							290
5.75% Notes Due March 2033 \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Settled in Period						300
Derivative Notional Amount, Entered in Period						300
5.625% Notes Due February 2034 \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Entered in Period \| €							97
5.625% Notes Due February 2034 \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Entered in Period						100
Debt with Various Maturities \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount \| €										€ 1,793		€ 1,707
Debt with Various Maturities \| Cross Currency Interest Rate Contract [Member] \| Japan, Yen \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount \| ¥											¥ 7,885		¥ 7,885
5.0% Notes Due Aug 2029 \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Entered in Period \| €							€ 97
5.0% Notes Due Aug 2029 \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Entered in Period						$ 100
4.500% Notes Due Feb 2031 \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Entered in Period \| €					86
4.500% Notes Due Feb 2031 \| Cross Currency Interest Rate Contract [Member] \| Euro Member Countries, Euro \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche Two
Derivative [Line Items]
Derivative Notional Amount, Entered in Period \| €					€ 226
4.500% Notes Due Feb 2031 \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Notional Amount, Entered in Period				100
4.500% Notes Due Feb 2031 \| Cross Currency Interest Rate Contract [Member] \| United States of America, Dollars \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member] \| Tranche Two
Derivative [Line Items]
Derivative Notional Amount, Entered in Period				$ 235