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SEGMENT INFORMATION Part 1 (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) Segment | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of Reportable Segments | Segment |  |  |  |  |  |  |  |  |  | 4 |  |
Sales [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  | $ 2,186 | $ 2,122 | $ 1,924 | $ 2,241 | $ 2,205 | $ 2,325 | $ 2,363 | $ 2,380 | $ 8,473 | $ 9,273 | $ 10,151
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | 741 | 1,120 | 1,552
Assets by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Assets by Segment | [1] | 16,083 |  |  |  | 16,008 |  |  |  | 16,083 | 16,008 |
Depreciation and Amortization Expense by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense by segment |  |  |  |  |  |  |  |  |  | 574 | 611 | 604
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditure by Segment |  |  |  |  |  |  |  |  |  | 383 | 425 | 528
Property, Plant and Equipment, Net |  | 5,549 |  |  |  | 5,571 |  |  |  | 5,549 | 5,571 | 5,600
Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | 3,022 | 3,273 | 3,647
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | 312 | 496 | 639
Assets by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Assets by Segment | [1] | 6,238 |  |  |  | 6,387 |  |  |  | 6,238 | 6,387 |
Depreciation and Amortization Expense by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense by segment |  |  |  |  |  |  |  |  |  | 220 | 218 | 219
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditure by Segment |  |  |  |  |  |  |  |  |  | 126 | 152 | 150
Advanced Materials [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | 2,524 | 2,688 | 2,755
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | 427 | 517 | 509
Assets by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Assets by Segment | [1] | 4,345 |  |  |  | 4,415 |  |  |  | 4,345 | 4,415 |
Depreciation and Amortization Expense by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense by segment |  |  |  |  |  |  |  |  |  | 187 | 172 | 169
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditure by Segment |  |  |  |  |  |  |  |  |  | 140 | 130 | 187
Chemical Intermediates [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | 2,090 | 2,443 | 2,831
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | 166 | 170 | 308
Assets by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Assets by Segment | [1] | 2,614 |  |  |  | 2,775 |  |  |  | 2,614 | 2,775 |
Depreciation and Amortization Expense by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense by segment |  |  |  |  |  |  |  |  |  | 108 | 150 | 151
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditure by Segment |  |  |  |  |  |  |  |  |  | 84 | 98 | 137
Fibers [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | 837 | 869 | 918
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | 180 | 194 | 257
Assets by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Assets by Segment | [1] | 978 |  |  |  | 1,014 |  |  |  | 978 | 1,014 |
Depreciation and Amortization Expense by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense by segment |  |  |  |  |  |  |  |  |  | 56 | 64 | 64
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditure by Segment |  |  |  |  |  |  |  |  |  | 31 | 42 | 50
All Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | 1,085 | 1,377 | 1,713
Assets by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Assets by Segment | [1] | 14,175 |  |  |  | 14,591 |  |  |  | 14,175 | 14,591 |
Depreciation and Amortization Expense by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense by segment |  |  |  |  |  |  |  |  |  | 571 | 604 | 603
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditure by Segment |  |  |  |  |  |  |  |  |  | 381 | 422 | 524
Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and Amortization Expense by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense by segment |  |  |  |  |  |  |  |  |  | 3 | 7 | 1
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditure by Segment |  |  |  |  |  |  |  |  |  | 2 | 3 | 4
Corporate Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Assets by Segment | [1] | 1,908 |  |  |  | 1,417 |  |  |  | 1,908 | 1,417 |
UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |
Sales [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | 3,437 | 3,720 | 4,118
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Net |  | 4,106 |  |  |  | 4,178 |  |  |  | 4,106 | 4,178 | 4,228
All Foreign Countries [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | 5,036 | 5,553 | 6,033
Capital Expenditures by Segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Net |  | $ 1,443 |  |  |  | $ 1,393 |  |  |  | 1,443 | 1,393 | 1,372
Corporate, Non-Segment [Member] | Other Nonoperating Income (Expense) [Member] |  |  |  |  |  |  |  |  |  |  |  |
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | (20) | (9) | (24)
Corporate, Non-Segment [Member] | Growth initiatives and businesses not allocated to operating segments |  |  |  |  |  |  |  |  |  |  |  |
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | (95) | (102) | (114)
Corporate, Non-Segment [Member] | Pension and other postretirement benefit plans income (expense), net not allocated to operating segments |  |  |  |  |  |  |  |  |  |  |  |
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | (156) | (97) | (17)
Corporate, Non-Segment [Member] | Asset impairments and restructuring charges, net |  |  |  |  |  |  |  |  |  |  |  |
Operating Earnings (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net |  |  |  |  |  |  |  |  |  | $ (73) | $ (49) | $ (6)
[1] | The chief operating decision maker holds operating segment management accountable for accounts receivable, inventory, fixed assets, goodwill, and intangible assets.

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Balance Type: |
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X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=emn_CorporateAssetsMember
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Period Type: |

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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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