Dow (DOW) 10-K 5 Feb 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2020	Jan. 31, 2021	Jun. 30, 2020
Entity Information [Line Items]
Entity File Number	001-38646
Entity Registrant Name	Dow Inc.
Entity Tax Identification Number	30-1128146
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Incorporation, State or Country Code	DE
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001751788
Current Fiscal Year End Date	--12-31
Entity Public Float			$ 29,600,000,000
ICFR Auditor Attestation Flag	true
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Document Information [Line Items]
Document Period End Date	Dec. 31, 2020
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Entity Shell Company	false
Entity Interactive Data Current	Yes
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	DOW
Security Exchange Name	NYSE
Entity Listing, Par Value Per Share	$ 0.01
Entity Common Stock, Shares Outstanding		743,914,560
Entity Addresses [Line Items]
Entity Address, Address Line One	2211 H.H. Dow Way
Entity Address, City or Town	Midland
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48674
City Area Code	989
Local Phone Number	636-1000
The Dow Chemical Company
Entity Information [Line Items]
Entity File Number	001-03433
Entity Registrant Name	The Dow Chemical Company
Entity Tax Identification Number	38-1285128
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Incorporation, State or Country Code	DE
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000029915
Current Fiscal Year End Date	--12-31
ICFR Auditor Attestation Flag	true
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Document Information [Line Items]
Document Period End Date	Dec. 31, 2020
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Entity Shell Company	false
Entity Interactive Data Current	Yes
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Listings [Line Items]
Security Exchange Name	NYSE
Entity Listing, Par Value Per Share	$ 0.01
Entity Common Stock, Shares Outstanding		100
Entity Addresses [Line Items]
Entity Address, Address Line One	2211 H.H. Dow Way
Entity Address, City or Town	Midland
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48674
City Area Code	989
Local Phone Number	636-1000
0.500% Notes due March 15, 2027 [Member] | The Dow Chemical Company
Entity Listings [Line Items]
Title of 12(b) Security	0.500% Notes due March 15, 2027
Trading Symbol	DOW/27
1.125% Notes due March 15, 2032 [Member] | The Dow Chemical Company
Entity Listings [Line Items]
Title of 12(b) Security	1.125% Notes due March 15, 2032
Trading Symbol	DOW/32
1.875% Notes due March 15, 2040 [Member] | The Dow Chemical Company
Entity Listings [Line Items]
Title of 12(b) Security	1.875% Notes due March 15, 2040
Trading Symbol	DOW/40
4.625% Notes due October 1, 2044 [Member] | The Dow Chemical Company
Entity Listings [Line Items]
Title of 12(b) Security	4.625% Notes due October 1, 2044
Trading Symbol	DOW/44

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities
Net income (loss)					$ 1,294	$ (1,272)	$ 4,775
Less: Income from discontinued operations, net of tax	$ 0	$ 0	$ 0	$ 445	0	445	1,835
Income (loss) from continuing operations, net of tax	(2,310)	$ 347	$ 90	156	1,294	(1,717)	2,940
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Depreciation and amortization					2,874	2,938	2,909
Provision (Credit) for deferred income tax					258	(228)	(429)
Earnings of nonconsolidated affiliates less than (in excess of) dividends received					443	1,114	108
Net periodic pension benefit cost					266	144	279
Pension contributions					(299)	(261)	(1,651)
Net gain on sales of assets, businesses and investments					(802)	(81)	(38)
Restructuring, goodwill impairment and asset related charges - net					708	3,219	221
Other net loss					318	198	415
Changes in assets and liabilities, net of effects of acquired and divested companies:
Accounts and notes receivable					171	1,253	(855)
Inventories					515	668	(859)
Accounts payable					(84)	(948)	787
Other assets and liabilities, net					590	(586)	(731)
Cash provided by operating activities - continuing operations					6,252	5,713	3,096
Cash provided by (used for) operating activities - discontinued operations					(26)	217	1,158
Cash provided by (used for) operating activities					6,226	5,930	4,254
Investing Activities
Capital expenditures					(1,252)	(1,961)	(2,091)
Investment in gas field developments					(5)	(76)	(114)
Purchases of previously leased assets					(5)	(9)	(26)
Proceeds from sales of property and businesses, net of cash divested					929	84	47
Acquisitions of property and businesses, net of cash acquired					(130)	0	(20)
Investments in and loans to nonconsolidated affiliates					(333)	(638)	(18)
Distributions and loan repayments from nonconsolidated affiliates					7	89	55
Purchases of investments					(1,203)	(899)	(1,530)
Proceeds from sales and maturities of investments					1,122	1,252	1,214
Proceeds from interests in trade accounts receivable conduits					0	0	657
Other investing activities, net					29	0	0
Cash used for investing activities - continuing operations					(841)	(2,158)	(1,826)
Cash used for investing activities - discontinued operations					0	(34)	(369)
Cash provided by (used for) investing activities					(841)	(2,192)	(2,195)
Financing Activities
Changes in short-term notes payable					(431)	307	(178)
Proceeds from Short-term Debt, Maturing in More than Three Months					163	0	0
Repayments of Short-term Debt, Maturing in More than Three Months					(163)	0	0
Proceeds from issuance of long-term debt					4,672	2,287	1,999
Payments on long-term debt					(4,653)	(5,561)	(3,054)
Purchases of treasury stock					(125)	(500)	0
Proceeds from issuance of parent company stock					108	93	112
Transaction financing, debt issuance and other costs					(175)	(119)	(70)
Employee taxes paid for share-based payment arrangements					(27)	(60)	(77)
Distributions to noncontrolling interests					(62)	(77)	(135)
Purchases of noncontrolling interests					0	(297)	0
Dividends paid to stockholders					(2,071)	(1,550)	0
Settlements and transfers related to separation from DowDuPont Inc.					0	1,935	(240)
Other financing activities, net					0	0	3
Cash used for financing activities - continuing operations					(2,764)	(4,077)	(5,351)
Cash used for financing activities - discontinued operations					0	(18)	(53)
Cash used for financing activities					(2,764)	(4,095)	(5,404)
Effect of exchange rate changes on cash, cash equivalents and restricted cash					107	(27)	(99)
Summary
Decrease in cash, cash equivalents and restricted cash					2,728	(384)	(3,444)
Cash, cash equivalents and restricted cash at beginning of year				$ 2,764	2,380	2,764	6,208
Cash, cash equivalents and restricted cash at end of year	2,380				5,108	2,380	2,764
Less: Restricted cash and cash equivalents, included in Other current assets	13				4	13	40
Cash and cash equivalents at end of year	$ 2,367				5,104	2,367	2,724
DowDuPont
Financing Activities
Dividends paid to stockholders					$ 0	$ (535)	$ (3,711)

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 10,706	$ 9,712	$ 8,354	$ 9,770	$ 10,204	$ 10,764	$ 11,014	$ 10,969	$ 38,542	$ 42,951	$ 49,604
Cost of sales	9,135	8,371	7,610	8,230	8,718	9,377	9,420	9,142	33,346	36,657	41,074
Research and development expenses									768	765	800
Selling, general and administrative expenses									1,471	1,590	1,782
Amortization of intangibles									401	419	469
Restructuring, goodwill impairment and asset related charges - net	(11)	617	6	96	2,851	147	65	156	708	3,219	221
Integration and separation costs	65	63	46	65	99	164	348	452	239	1,063	1,179
Equity in earnings (losses) of nonconsolidated affiliates									(18)	(94)	555
Sundry income (expense) - net									1,269	461	96
Interest income									38	81	82
Interest expense and amortization of debt discount									827	933	1,063
Income (loss) from continuing operations before income taxes									2,071	(1,247)	3,749
Provision for income taxes on continuing operations									777	470	809
Income (loss) from continuing operations, net of tax					(2,310)	347	90	156	1,294	(1,717)	2,940
Income from discontinued operations, net of tax					0	0	0	445	0	445	1,835
Net income (loss)	1,254	(1)	(217)	258	(2,310)	347	90	601	1,294	(1,272)	4,775
Net income attributable to noncontrolling interests									69	87	134
Net income (loss) available for The Dow Chemical Company common stockholder	$ 1,236	$ (25)	$ (225)	$ 239	$ (2,323)	$ 333	$ 75	$ 556	$ 1,225	$ (1,359)	$ 4,641
Earnings (loss) per common share from continuing operations - basic	$ 1.66	$ (0.04)	$ (0.31)	$ 0.32	$ (3.14)	$ 0.45	$ 0.10	$ 0.16	$ 1.64	$ (2.42)	$ 3.80
Earnings per common share from discontinued operations - basic									0	0.58	2.41
Earnings (loss) per common share - basic									1.64	(1.84)	6.21
Earnings (loss) per common share from continuing operations - diluted	$ 1.65	$ (0.04)	$ (0.31)	$ 0.32	$ (3.14)	$ 0.45	$ 0.10	$ 0.16	1.64	(2.42)	3.80
Earnings per common share from discontinued operations - diluted									0	0.58	2.41
Earnings (loss) per common share - diluted									$ 1.64	$ (1.84)	$ 6.21
Weighted-average common shares outstanding - basic									740.5	742.5	747.2
Weighted-average common shares outstanding - diluted									742.3	742.5	747.2

Dow Inc. Consolidated Statement

Dow Inc. Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,254	$ (1)	$ (217)	$ 258	$ (2,310)	$ 347	$ 90	$ 601	$ 1,294	$ (1,272)	$ 4,775
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments									40	115	(67)
Cumulative translation adjustments									205	(32)	(225)
Pension and other postretirement benefit plans									(778)	(899)	(40)
Derivative instruments									(76)	(338)	75
Total other comprehensive loss									(609)	(1,154)	(257)
Comprehensive income (loss)									685	(2,426)	4,518
Comprehensive income attributable to noncontrolling interests, net of tax									69	99	97
Comprehensive income (loss) attributable to Dow Inc.									$ 616	$ (2,525)	$ 4,421

Dow Consolidated Balance Sheets

Dow Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Cash and cash equivalents (variable interest entities restricted - 2020: $26; 2019: $37)	$ 5,104	$ 2,367
Trade (net of allowance for doubtful receivables - 2020: $51; 2019: $45)	4,839	4,844
Other	2,551	2,711
Inventories	5,701	6,214
Other current assets	889	679
Total current assets	19,084	16,815
Investment in nonconsolidated affiliates	1,327	1,404
Other investments (investments carried at fair value - 2020: $1,674; 2019: $1,584)	2,775	2,588
Noncurrent receivables	465	1,063
Total investments	4,567	5,055
Property	56,325	54,910
Less: Accumulated depreciation	36,086	33,914
Net property	20,239	20,996
Goodwill	8,908	8,796
Other intangible assets	3,352	3,759
Operating lease right-of-use assets	1,856	2,072
Deferred income tax assets	2,215	2,213
Deferred charges and other assets	1,249	818
Total other assets	17,580	17,658
Total Assets	61,470	60,524
Notes payable	156	586
Long-term debt due within one year	460	435
Trade	3,763	3,889
Accounts Payable, Other, Current	2,126	2,064
Operating lease liabilities - current	416	421
Income taxes payable	397	522
Accrued and other current liabilities	3,790	2,762
Total current liabilities	11,108	10,679
Long-Term Debt (variable interest entities nonrecourse - 2020: $6; 2019: $34)	16,491	15,975
Deferred income tax liabilities	405	347
Pension and other postretirement benefits - noncurrent	11,648	10,083
Asbestos-related liabilities - noncurrent	1,013	1,060
Operating lease liabilities - noncurrent	1,521	1,739
Other noncurrent obligations	6,279	6,547
Total other noncurrent liabilities	20,866	19,776
Common stock (authorized 5,000,000,000 shares of $0.01 par value each; issued 2020: 755,993,198 shares; 2019: 751,228,644 shares)	8	8
Additional paid-in capital	7,595	7,325
Retained earnings	16,361	17,045
Accumulated other comprehensive loss	(10,855)	(10,246)
Unearned ESOP shares	(49)	(91)
Treasury stock at cost (2020: 12,803,303 shares; 2019: 9,729,834 shares)	(625)	(500)
Dow Inc.’s stockholders’ equity	12,435	13,541
Noncontrolling interests	570	553
Total equity	13,005	14,094
Total Liabilities and Equity	$ 61,470	$ 60,524

Dow Consolidated Balance Shee_2

Dow Consolidated Balance Sheets Parentheticals - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Cash and cash equivalents (variable interest entities restricted - 2020: $26; 2019: $37)	$ 5,104	$ 2,367
Allowance for doubtful receivables	51	45
Investments carried at fair value	1,674	1,584
Net property	20,239	20,996
Other intangible assets, accumulated amortization	4,428	3,886
Long-Term Debt (variable interest entities nonrecourse - 2020: $6; 2019: $34)	$ 16,491	$ 15,975
Common stock authorized (in shares)	5,000,000,000
Common stock, par value (in dollars per share)	$ 0.01
Common stock issued (in shares)	755,993,198	751,228,644
Treasury stock (in shares)	12,803,303	9,729,834
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalents (variable interest entities restricted - 2020: $26; 2019: $37)	$ 26	$ 37
Net property	232	330
Long-Term Debt (variable interest entities nonrecourse - 2020: $6; 2019: $34)	$ 6	$ 34

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Add'l Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Unearned ESOP	Treasury Stock
Dividends declared per share of common stock	$ 0
Beginning balance at Dec. 31, 2017		$ 0	$ 6,553	$ 33,742	$ (8,591)	$ (189)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock issued/sold			0
Issuance of parent company stock			112
Stock-based compensation and allocation of ESOP shares			377			55
Other			0	(19)
Net income (loss) available for The Dow Chemical Company common stockholder	$ 4,641			4,641
Dividends to stockholders				0
Dividends to parent				(3,711)
Settlements and transfers related to separation from DowDuPont Inc.	240			(182)	0
Stockholders' Equity, Period Increase (Decrease) | Adjustments for New Accounting Pronouncement [Member]				989	(1,037)
Other comprehensive income (loss)	(257)				(257)
ESOP shares acquired						0
Treasury stock purchases							0
Ending balance at Dec. 31, 2018	33,621	0	7,042	35,460	(9,885)	(134)	0
Dow Inc.’s stockholders’ equity	32,483
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interests	$ 1,138
Dividends declared per share of common stock	$ 2.10
Common stock issued		8
Common stock issued/sold			57
Issuance of parent company stock			28
Stock-based compensation and allocation of ESOP shares			235			45
Other			(37)	(14)
Net income (loss) available for The Dow Chemical Company common stockholder	$ (1,359)			(1,359)
Dividends to stockholders				(1,550)
Dividends to parent				(535)
Settlements and transfers related to separation from DowDuPont Inc.	(1,935)			(14,806)	793
Stockholders' Equity, Period Increase (Decrease) | Adjustments for New Accounting Pronouncement [Member]				(151)	0
Other comprehensive income (loss)	(1,154)				(1,154)
ESOP shares acquired						(2)
Treasury stock purchases							(500)
Ending balance at Dec. 31, 2019	14,094	8	7,325	17,045	(10,246)	(91)	(500)
Dow Inc.’s stockholders’ equity	13,541
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interests	$ 553
Dividends declared per share of common stock	$ 2.80
Common stock issued		0
Common stock issued/sold			108
Issuance of parent company stock			0
Stock-based compensation and allocation of ESOP shares			162			42
Other			0	(15)
Net income (loss) available for The Dow Chemical Company common stockholder	$ 1,225			1,225
Dividends to stockholders				(2,071)
Dividends to parent				0
Settlements and transfers related to separation from DowDuPont Inc.	0			177	0
Stockholders' Equity, Period Increase (Decrease) | Adjustments for New Accounting Pronouncement [Member]				0	0
Other comprehensive income (loss)	(609)				(609)
ESOP shares acquired						0
Treasury stock purchases							(125)
Ending balance at Dec. 31, 2020	13,005	$ 8	$ 7,595	$ 16,361	$ (10,855)	$ (49)	$ (625)
Dow Inc.’s stockholders’ equity	12,435
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interests	$ 570

TDCC Consolidated Statements of

TDCC Consolidated Statements of Income Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net sales	$ 38,542	$ 42,951	$ 49,604
Cost of sales	33,346	36,657	41,074
Research and development expenses	768	765	800
Selling, general and administrative expenses	1,471	1,590	1,782
Amortization of intangibles	401	419	469
Restructuring, goodwill impairment and asset related charges - net	708	3,219	221
Business Combination, Integration And Separation Related Costs	239	1,063	1,179
Equity in earnings (losses) of nonconsolidated affiliates	(18)	(94)	555
Sundry income (expense) - net	1,269	461	96
Interest income	38	81	82
Interest expense and amortization of debt discount	827	933	1,063
Income (loss) from continuing operations before income taxes	2,071	(1,247)	3,749
Provision for income taxes on continuing operations	777	470	809
Income (loss) from continuing operations, net of tax	1,294	(1,717)	2,940
Income from discontinued operations, net of tax	0	445	1,835
Net income (loss)	1,294	(1,272)	4,775
Net income attributable to noncontrolling interests	69	87	134
Net income (loss) available for The Dow Chemical Company common stockholder	1,225	(1,359)	4,641
The Dow Chemical Company
Net sales	38,542	42,951	49,604
Cost of sales	33,343	36,657	41,074
Research and development expenses	768	765	800
Selling, general and administrative expenses	1,471	1,585	1,782
Amortization of intangibles	401	419	469
Restructuring, goodwill impairment and asset related charges - net	708	3,219	221
Business Combination, Integration And Separation Related Costs	239	1,039	1,179
Equity in earnings (losses) of nonconsolidated affiliates	(18)	(94)	555
Sundry income (expense) - net	1,274	573	96
Interest income	40	81	82
Interest expense and amortization of debt discount	827	952	1,063
Income (loss) from continuing operations before income taxes	2,081	(1,125)	3,749
Provision for income taxes on continuing operations	777	470	809
Income (loss) from continuing operations, net of tax	1,304	(1,595)	2,940
Income from discontinued operations, net of tax	0	445	1,835
Net income (loss)	1,304	(1,150)	4,775
Net income attributable to noncontrolling interests	69	87	134
Net income (loss) available for The Dow Chemical Company common stockholder	$ 1,235	$ (1,237)	$ 4,641

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ 1,294	$ (1,272)	$ 4,775
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	40	115	(67)
Cumulative translation adjustments	205	(32)	(225)
Pension and other postretirement benefit plans	(778)	(899)	(40)
Derivative instruments	(76)	(338)	75
Total other comprehensive loss	(609)	(1,154)	(257)
Comprehensive income (loss)	685	(2,426)	4,518
Comprehensive income attributable to noncontrolling interests, net of tax	69	99	97
Comprehensive income (loss) attributable to The Dow Chemical Company	616	(2,525)	4,421
The Dow Chemical Company
Net income (loss)	1,304	(1,150)	4,775
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	40	115	(67)
Cumulative translation adjustments	205	(32)	(225)
Pension and other postretirement benefit plans	(778)	(899)	(40)
Derivative instruments	(76)	(338)	75
Total other comprehensive loss	(609)	(1,154)	(257)
Comprehensive income (loss)	695	(2,304)	4,518
Comprehensive income attributable to noncontrolling interests, net of tax	69	99	97
Comprehensive income (loss) attributable to The Dow Chemical Company	$ 626	$ (2,403)	$ 4,421

TDCC Consolidated Balance Sheet

TDCC Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Cash and cash equivalents (variable interest entities restricted - 2020: $26; 2019: $37)	$ 5,104	$ 2,367
Trade (net of allowance for doubtful receivables - 2020: $51; 2019: $45)	4,839	4,844
Other	2,551	2,711
Inventories	5,701	6,214
Other current assets	889	679
Total current assets	19,084	16,815
Investment in nonconsolidated affiliates	1,327	1,404
Other investments (investments carried at fair value - 2020: $1,674; 2019: $1,584)	2,775	2,588
Noncurrent receivables	465	1,063
Total investments	4,567	5,055
Property	56,325	54,910
Less: Accumulated depreciation	36,086	33,914
Net property	20,239	20,996
Goodwill	8,908	8,796
Other intangible assets	3,352	3,759
Operating lease right-of-use assets	1,856	2,072
Deferred income tax assets	2,215	2,213
Deferred charges and other assets	1,249	818
Total other assets	17,580	17,658
Total Assets	61,470	60,524
Notes payable	156	586
Long-term debt due within one year	460	435
Trade	3,763	3,889
Accounts Payable, Other, Current	2,126	2,064
Operating lease liabilities - current	416	421
Income taxes payable	397	522
Accrued and other current liabilities	3,790	2,762
Total current liabilities	11,108	10,679
Long-Term Debt (variable interest entities nonrecourse - 2020: $6; 2019: $34)	16,491	15,975
Deferred income tax liabilities	405	347
Pension and other postretirement benefits - noncurrent	11,648	10,083
Asbestos-related liabilities - noncurrent	1,013	1,060
Operating lease liabilities - noncurrent	1,521	1,739
Other noncurrent obligations	6,279	6,547
Total other noncurrent liabilities	20,866	19,776
Common stock (authorized 5,000,000,000 shares of $0.01 par value each; issued 2020: 755,993,198 shares; 2019: 751,228,644 shares)	8	8
Additional paid-in capital	7,595	7,325
Retained earnings	16,361	17,045
Accumulated other comprehensive loss	(10,855)	(10,246)
Unearned ESOP shares	(49)	(91)
Dow Inc.’s stockholders’ equity	12,435	13,541
Noncontrolling interests	570	553
Total equity	13,005	14,094
Total Liabilities and Equity	61,470	60,524
The Dow Chemical Company
Cash and cash equivalents (variable interest entities restricted - 2020: $26; 2019: $37)	5,104	2,367
Trade (net of allowance for doubtful receivables - 2020: $51; 2019: $45)	4,839	4,844
Other	2,553	2,716
Inventories	5,701	6,214
Other current assets	801	592
Total current assets	18,998	16,733
Investment in nonconsolidated affiliates	1,327	1,404
Other investments (investments carried at fair value - 2020: $1,674; 2019: $1,584)	2,775	2,588
Noncurrent receivables	426	1,011
Total investments	4,528	5,003
Property	56,325	54,910
Less: Accumulated depreciation	36,086	33,914
Net property	20,239	20,996
Goodwill	8,908	8,796
Other intangible assets	3,352	3,759
Operating lease right-of-use assets	1,856	2,072
Deferred income tax assets	2,215	2,213
Deferred charges and other assets	1,249	818
Total other assets	17,580	17,658
Total Assets	61,345	60,390
Notes payable	156	586
Long-term debt due within one year	460	435
Trade	3,763	3,889
Accounts Payable, Other, Current	2,126	2,064
Operating lease liabilities - current	416	421
Income taxes payable	397	522
Accrued and other current liabilities	3,256	2,233
Total current liabilities	10,574	10,150
Long-Term Debt (variable interest entities nonrecourse - 2020: $6; 2019: $34)	16,491	15,975
Deferred income tax liabilities	405	347
Pension and other postretirement benefits - noncurrent	11,648	10,083
Asbestos-related liabilities - noncurrent	1,013	1,060
Operating lease liabilities - noncurrent	1,521	1,739
Other noncurrent obligations	6,124	6,174
Total other noncurrent liabilities	20,711	19,403
Common stock (authorized 5,000,000,000 shares of $0.01 par value each; issued 2020: 755,993,198 shares; 2019: 751,228,644 shares)	0	0
Additional paid-in capital	7,603	7,333
Retained earnings	16,300	17,313
Accumulated other comprehensive loss	(10,855)	(10,246)
Unearned ESOP shares	(49)	(91)
Dow Inc.’s stockholders’ equity	12,999	14,309
Noncontrolling interests	570	553
Total equity	13,569	14,862
Total Liabilities and Equity	$ 61,345	$ 60,390

TDCC Consolidated Statements _2

TDCC Consolidated Statements of Cash Flows Statement $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Net income (loss)	$ 1,294	$ (1,272)	$ 4,775
Income from discontinued operations, net of tax	0	445	1,835
Income from continuing operations, net of tax	1,294	(1,717)	2,940
Depreciation and amortization	2,874	2,938	2,909
Provision (Credit) for deferred income tax	258	(228)	(429)
Earnings of nonconsolidated affiliates less than (in excess of) dividends received	443	1,114	108
Net periodic pension benefit cost	266	144	279
Pension contributions	(299)	(261)	(1,651)
Net gain on sales of assets, businesses and investments	(802)	(81)	(38)
Restructuring, goodwill impairment and asset related charges - net	708	3,219	221
Other net loss	318	198	415
Accounts and notes receivable	171	1,253	(855)
Inventories	515	668	(859)
Accounts payable	(84)	(948)	787
Other assets and liabilities, net	590	(586)	(731)
Cash provided by operating activities - continuing operations	6,252	5,713	3,096
Cash provided by (used for) operating activities - discontinued operations	(26)	217	1,158
Cash provided by (used for) operating activities	6,226	5,930	4,254
Capital expenditures	(1,252)	(1,961)	(2,091)
Investment in gas field developments	(5)	(76)	(114)
Purchases of previously leased assets	(5)	(9)	(26)
Proceeds from sales of property and businesses, net of cash divested	929	84	47
Acquisitions of property and businesses, net of cash acquired	(130)	0	(20)
Investments in and loans to nonconsolidated affiliates	(333)	(638)	(18)
Distributions and loan repayments from nonconsolidated affiliates	7	89	55
Purchases of investments	(1,203)	(899)	(1,530)
Proceeds from sales and maturities of investments	1,122	1,252	1,214
Proceeds from interests in trade accounts receivable conduits	0	0	657
Other investing activities, net	29	0	0
Cash used for investing activities - continuing operations	(841)	(2,158)	(1,826)
Cash used for investing activities - discontinued operations	0	(34)	(369)
Cash provided by (used for) investing activities	(841)	(2,192)	(2,195)
Changes in short-term notes payable	(431)	307	(178)
Proceeds from Short-term Debt, Maturing in More than Three Months	163	0	0
Repayments of Short-term Debt, Maturing in More than Three Months	(163)	0	0
Proceeds from issuance of long-term debt	4,672	2,287	1,999
Payments on long-term debt	(4,653)	(5,561)	(3,054)
Proceeds from issuance of parent company stock	108	93	112
Transaction financing, debt issuance and other costs	(175)	(119)	(70)
Employee taxes paid for share-based payment arrangements	(27)	(60)	(77)
Distributions to noncontrolling interests	(62)	(77)	(135)
Purchases of noncontrolling interests	0	(297)	0
Payments of Ordinary Dividends, Common Stock	2,071	1,550	0
Transfer of business under common control	0	1,935	(240)
Other financing activities, net	0	0	3
Cash used for financing activities - continuing operations	(2,764)	(4,077)	(5,351)
Cash used for financing activities - discontinued operations	0	(18)	(53)
Cash used for financing activities	(2,764)	(4,095)	(5,404)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	107	(27)	(99)
Decrease in cash, cash equivalents and restricted cash	2,728	(384)	(3,444)
Cash, cash equivalents and restricted cash at beginning of year	2,380	2,764	6,208
Cash, cash equivalents and restricted cash at end of year	5,108	2,380	2,764
Less: Restricted cash and cash equivalents, included in Other current assets	4	13	40
Cash and cash equivalents at end of year	5,104	2,367	2,724
The Dow Chemical Company
Net income (loss)	1,304	(1,150)	4,775
Income from discontinued operations, net of tax	0	445	1,835
Income from continuing operations, net of tax	1,304	(1,595)	2,940
Depreciation and amortization	2,874	2,938	2,909
Provision (Credit) for deferred income tax	258	(228)	(429)
Earnings of nonconsolidated affiliates less than (in excess of) dividends received	443	1,114	108
Net periodic pension benefit cost	266	144	279
Pension contributions	(299)	(261)	(1,651)
Net gain on sales of assets, businesses and investments	(802)	(81)	(38)
Restructuring, goodwill impairment and asset related charges - net	708	3,219	221
Other net loss	320	213	415
Accounts and notes receivable	171	1,253	(855)
Inventories	515	668	(859)
Accounts payable	(84)	(948)	787
Other assets and liabilities, net	589	(730)	(731)
Cash provided by operating activities - continuing operations	6,263	5,706	3,096
Cash provided by (used for) operating activities - discontinued operations	0	371	1,158
Cash provided by (used for) operating activities	6,263	6,077	4,254
Capital expenditures	(1,252)	(1,961)	(2,091)
Investment in gas field developments	(5)	(76)	(114)
Purchases of previously leased assets	(5)	(9)	(26)
Proceeds from sales of property and businesses, net of cash divested	929	84	47
Acquisitions of property and businesses, net of cash acquired	(130)	0	(20)
Investments in and loans to nonconsolidated affiliates	(333)	(638)	(18)
Distributions and loan repayments from nonconsolidated affiliates	7	89	55
Purchases of investments	(1,203)	(899)	(1,530)
Proceeds from sales and maturities of investments	1,122	1,252	1,214
Proceeds from interests in trade accounts receivable conduits	0	0	657
Other investing activities, net	29	0	0
Cash used for investing activities - continuing operations	(841)	(2,158)	(1,826)
Cash used for investing activities - discontinued operations	0	(34)	(369)
Cash provided by (used for) investing activities	(841)	(2,192)	(2,195)
Changes in short-term notes payable	(431)	307	(178)
Proceeds from Short-term Debt, Maturing in More than Three Months	163	0	0
Repayments of Short-term Debt, Maturing in More than Three Months	(163)	0	0
Proceeds from issuance of long-term debt	4,672	2,287	1,999
Payments on long-term debt	(4,653)	(5,561)	(3,054)
Proceeds from issuance of parent company stock	108	93	112
Transaction financing, debt issuance and other costs	(175)	(119)	(70)
Employee taxes paid for share-based payment arrangements	(27)	(60)	(77)
Distributions to noncontrolling interests	(62)	(77)	(135)
Purchases of noncontrolling interests	0	(297)	0
Transfer of business under common control	0	(61)	(240)
Other financing activities, net	0	0	3
Cash used for financing activities - continuing operations	(2,801)	(4,224)	(5,351)
Cash used for financing activities - discontinued operations	0	(18)	(53)
Cash used for financing activities	(2,801)	(4,242)	(5,404)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	107	(27)	(99)
Decrease in cash, cash equivalents and restricted cash	2,728	(384)	(3,444)
Cash, cash equivalents and restricted cash at beginning of year	2,380	2,764	6,208
Cash, cash equivalents and restricted cash at end of year	5,108	2,380	2,764
Less: Restricted cash and cash equivalents, included in Other current assets	4	13	40
Cash and cash equivalents at end of year	5,104	2,367	2,724
DowDuPont
Payments of Ordinary Dividends, Common Stock	0	535	3,711
DowDuPont | The Dow Chemical Company
Payments of Ordinary Dividends, Common Stock	0	535	3,711
Dow Inc. [Member] | The Dow Chemical Company
Payments of Ordinary Dividends, Common Stock	$ 2,233	$ 201	$ 0

TDCC Consolidated Statements _3

TDCC Consolidated Statements of Equity Statement - USD ($) $ in Millions	Total	Common Stock	Add'l Paid-in Capital	Retained Earnings [Member]	Accumulated Other Comprehensive Loss	Unearned ESOP	The Dow Chemical Company	The Dow Chemical CompanyCommon Stock	The Dow Chemical CompanyAdd'l Paid-in Capital	The Dow Chemical CompanyRetained Earnings [Member]	The Dow Chemical CompanyAccumulated Other Comprehensive Loss	The Dow Chemical CompanyUnearned ESOP	Dow Inc. [Member]The Dow Chemical CompanyAdd'l Paid-in Capital	Dow Inc. [Member]The Dow Chemical CompanyRetained Earnings [Member]	DowDuPontThe Dow Chemical CompanyAdd'l Paid-in Capital	DowDuPontThe Dow Chemical CompanyRetained Earnings [Member]
Beginning balance at Dec. 31, 2017		$ 0	$ 6,553	$ 33,742	$ (8,591)	$ (189)		$ 0	$ 6,553	$ 33,742	$ (8,591)	$ (189)
Issuance of parent company stock			112										$ 0		$ 112
Stock-based compensation and allocation of ESOP shares			377			55			377			55
Other			0	19					0	(19)
Net income (loss) available for The Dow Chemical Company common stockholder	$ 4,641			4,641			$ 4,641			4,641
Dividends to parent				(3,711)										$ (3,711)		$ 0
Settlements and transfers related to separation from DowDuPont Inc.	240			(182)	0		240			(182)	0
Stockholders' Equity, Period Increase (Decrease) | Adjustments for New Accounting Pronouncement [Member]				989	(1,037)					989	(1,037)
Other comprehensive income (loss)	(257)				(257)						(257)
ESOP shares acquired						0						0
Ending balance at Dec. 31, 2018	33,621	0	7,042	35,460	(9,885)	(134)	33,621	0	7,042	35,460	(9,885)	(134)
The Dow Chemical Company’s stockholder's equity	32,483						32,483
Noncontrolling interests	1,138						1,138
Issuance of parent company stock			28										65		28
Stock-based compensation and allocation of ESOP shares			235			45			235			45
Other			37	14					(37)	(14)
Net income (loss) available for The Dow Chemical Company common stockholder	(1,359)			(1,359)			(1,237)			(1,237)
Dividends to parent				(535)										(535)		(201)
Settlements and transfers related to separation from DowDuPont Inc.	(1,935)			(14,806)	793		61			(16,009)	793
Stockholders' Equity, Period Increase (Decrease) | Adjustments for New Accounting Pronouncement [Member]				(151)	0					(151)	0
Other comprehensive income (loss)	(1,154)				(1,154)						(1,154)
ESOP shares acquired						(2)						(2)
Ending balance at Dec. 31, 2019	14,094	8	7,325	17,045	(10,246)	(91)	14,862	$ 0	7,333	17,313	(10,246)	(91)
The Dow Chemical Company’s stockholder's equity	13,541						14,309
Noncontrolling interests	553						553
Issuance of parent company stock			0										$ 108		$ 0
Stock-based compensation and allocation of ESOP shares			162			42			162			42
Other			0	15					0	(15)
Net income (loss) available for The Dow Chemical Company common stockholder	1,225			1,225			1,235			1,235
Dividends to parent				0										$ 0		$ (2,233)
Settlements and transfers related to separation from DowDuPont Inc.	0			177	0		0			0	0
Stockholders' Equity, Period Increase (Decrease) | Adjustments for New Accounting Pronouncement [Member]				0	0					0	0
Other comprehensive income (loss)	(609)				(609)						(609)
ESOP shares acquired						0						0
Ending balance at Dec. 31, 2020	13,005	$ 8	$ 7,595	$ 16,361	$ (10,855)	$ (49)	13,569		$ 7,603	$ 16,300	$ (10,855)	$ (49)
The Dow Chemical Company’s stockholder's equity	12,435						12,999
Noncontrolling interests	$ 570						$ 570

TDCC Consolidated Balance She_2

TDCC Consolidated Balance Sheets Parentheticals - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash and cash equivalents (variable interest entities restricted - 2020: $26; 2019: $37)	$ 5,104	$ 2,367	$ 2,724
Investments carried at fair value	1,674	1,584
Net property	20,239	20,996	21,418
Other intangible assets, accumulated amortization	4,428	3,886
Long-Term Debt (variable interest entities nonrecourse - 2020: $6; 2019: $34)	$ 16,491	$ 15,975
Common stock authorized (in shares)	5,000,000,000
Common stock issued (in shares)	755,993,198	751,228,644
Common stock, par value (in dollars per share)	$ 0.01
The Dow Chemical Company
Cash and cash equivalents (variable interest entities restricted - 2020: $26; 2019: $37)	$ 5,104	$ 2,367	$ 2,724
Accounts Receivable, Allowance for Credit Loss	51	45
Net property	20,239	20,996
Other intangible assets, accumulated amortization	4,428	3,886
Long-Term Debt (variable interest entities nonrecourse - 2020: $6; 2019: $34)	$ 16,491	15,975
Common stock authorized (in shares)	100
Common stock issued (in shares)	100
Common stock, par value (in dollars per share)	$ 0.01
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalents (variable interest entities restricted - 2020: $26; 2019: $37)	$ 26	37
Net property	232	330
Long-Term Debt (variable interest entities nonrecourse - 2020: $6; 2019: $34)	$ 6	$ 34

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Merger and Separation On April 1, 2019, DowDuPont Inc. (“DowDuPont” and effective June 3, 2019, n/k/a DuPont de Nemours, Inc. or "DuPont") completed the separation of its materials science business and Dow Inc. became the direct parent company of The Dow Chemical Company and its consolidated subsidiaries (“TDCC” and together with Dow Inc., “Dow” or the “Company”). The separation was contemplated by the merger of equals transaction effective August 31, 2017, under the Agreement and Plan of Merger, dated as of December 11, 2015, as amended on March 31, 2017 (the "Merger Agreement"). TDCC and E. I. du Pont de Nemours and Company and its consolidated subsidiaries (“Historical DuPont”) each merged with subsidiaries of DowDuPont and, as a result, TDCC and Historical DuPont became subsidiaries of DowDuPont (the “Merger”). Subsequent to the Merger, TDCC and Historical DuPont engaged in a series of internal reorganization and realignment steps to realign their businesses into three subgroups: agriculture, materials science and specialty products. Dow Inc. was formed as a wholly owned subsidiary of DowDuPont to serve as the holding company for the materials science business. See Note 3 for additional information. Principles of Consolidation and Basis of Presentation The accompanying consolidated financial statements of Dow Inc. and TDCC were prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the assets, liabilities, revenues and expenses of all majority-owned subsidiaries over which Dow exercises control and, when applicable, entities for which Dow has a controlling financial interest or is the primary beneficiary. Intercompany transactions and balances are eliminated in consolidation. Investments in nonconsolidated affiliates (20-50 percent owned companies or less than 20 percent owned companies over which significant influence is exercised) are accounted for using the equity method. Effective April 1, 2019, Dow Inc. owns all of the outstanding common shares of TDCC. TDCC is deemed the predecessor to Dow Inc. and the historical results of TDCC are deemed the historical results of Dow Inc. for periods prior to and including March 31, 2019. As a result of the parent/subsidiary relationship between Dow Inc. and TDCC, and considering that the financial statements and disclosures of each company are substantially similar, the companies are filing a combined report for this Annual Report on Form 10-K. The information reflected in the report is equally applicable to both Dow Inc. and TDCC, except where otherwise noted. As of the effective date and time of the distribution, DowDuPont no longer beneficially owned any equity interest in Dow and no longer consolidated Dow and its consolidated subsidiaries into its financial results. The consolidated financial results of Dow for all periods presented reflect the distribution of TDCC’s agricultural sciences business (“AgCo”) and specialty products business (“SpecCo”) as discontinued operations, as well as the receipt of Historical DuPont’s ethylene and ethylene copolymers businesses (other than its ethylene acrylic elastomers business) (“ECP”) as a common control transaction from the closing of the Merger on August 31, 2017 ("Merger Date"). See Note 3 for additional information. The Company conducts its worldwide operations through six global businesses which are organized into the following operating segments: Packaging & Specialty Plastics, Industrial Intermediates & Infrastructure and Performance Materials & Coatings. Corporate contains the reconciliation between the totals for the operating segments and the Company's totals. See Note 26 for additional information. From the Merger Date through the separation, transactions between DowDuPont, TDCC and Historical DuPont and their affiliates were treated as related party transactions. Transactions between TDCC and Historical DuPont primarily consisted of the sale and procurement of certain raw materials that were consumed in each company's manufacturing process. Transactions between TDCC and Dow Inc. are treated as related party transactions for TDCC. See Note 25 for additional information. Throughout this Annual Report on Form 10-K, unless otherwise indicated, amounts and activity are presented on a continuing operations basis. Except as otherwise indicated by the context, the term "Union Carbide" means Union Carbide Corporation, a wholly owned subsidiary of the Company, and "Dow Silicones" means Dow Silicones Corporation, a wholly owned subsidiary of the Company. Use of Estimates in Financial Statement Preparation The preparation of financial statements in accordance with U.S. GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. The Company’s consolidated financial statements include amounts that are based on management’s best estimates and judgments. Actual results could differ from those estimates. Significant Accounting Policies Asbestos-Related Matters Accruals for asbestos-related matters, including defense and processing costs, are recorded based on an analysis of claim and resolution activity, defense spending, and pending and future claims. These accruals are assessed at each balance sheet date to determine if the asbestos-related liability remains appropriate. Accruals for asbestos-related matters are included in the consolidated balance sheets in “Accrued and other current liabilities” and “Asbestos-related liabilities - noncurrent.” See Note 16 for additional information. Legal Costs The Company expenses legal costs as incurred, with the exception of defense and processing costs associated with asbestos-related matters. Foreign Currency Translation The local currency has been primarily used as the functional currency throughout the world. Translation gains and losses of those operations that use local currency as the functional currency are included in the consolidated balance sheets in "Accumulated other comprehensive loss" ("AOCL"). For certain subsidiaries, the U.S. dollar is used as the functional currency. This occurs when the subsidiary operates in an economic environment where the products produced and sold are tied to U.S. dollar-denominated markets, or when the foreign subsidiary operates in a hyper-inflationary environment. Where the U.S. dollar is used as the functional currency, foreign currency translation gains and losses are reflected in income. Environmental Matters Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on current law and existing technologies. These accruals are adjusted periodically as assessment and remediation efforts progress or as additional technical or legal information becomes available. Accruals for environmental liabilities are included in the consolidated balance sheets in “Accrued and other current liabilities” and “Other noncurrent obligations” at undiscounted amounts. Accruals for related insurance or other third-party recoveries for environmental liabilities are recorded when it is probable that a recovery will be realized and are included in the consolidated balance sheets in “Accounts and notes receivable - Other” or "Noncurrent receivables." Environmental costs are capitalized if the costs extend the life of the property, increase its capacity and/or mitigate or prevent contamination from future operations. Environmental costs are also capitalized in recognition of legal asset retirement obligations resulting from the acquisition, construction and/or normal operation of a long-lived asset. Costs related to environmental contamination treatment and cleanup are charged to expense. Estimated future incremental operations, maintenance and management costs directly related to remediation are accrued when such costs are probable and reasonably estimable. Cash and Cash Equivalents Cash and cash equivalents include time deposits and investments with maturities of three months or less at the time of purchase. Financial Instruments The Company calculates the fair value of financial instruments using quoted market prices when available. When quoted market prices are not available for financial instruments, the Company uses standard pricing models with market-based inputs that take into account the present value of estimated future cash flows. The Company utilizes derivatives to manage exposures to foreign currency exchange rates, commodity prices and interest rate risk. The fair values of all derivatives are recognized as assets or liabilities at the balance sheet date. Changes in the fair values of these instruments are reported in income or AOCL, depending on the use of the derivative and whether the Company has elected hedge accounting treatment. Gains and losses on derivatives that are designated and qualify as cash flow hedging instruments are recorded in AOCL until the underlying transactions are recognized in income. Gains and losses on derivative and non-derivative instruments used as hedges of the Company’s net investment in foreign operations are recorded in AOCL as part of the cumulative translation adjustment. Gains and losses on derivatives designated and qualifying as fair value hedging instruments, as well as the offsetting losses and gains on the hedged items, are reported in income in the same accounting period. Derivatives not designated as hedging instruments are marked-to-market at the end of each accounting period with the results included in income. Inventories Inventories are stated at the lower of cost or net realizable value. The method of determining cost for each subsidiary varies among last-in, first-out (“LIFO”); first-in, first-out (“FIFO”); and average cost, and is used consistently from year to year. At December 31, 2020, approximately 30 percent, 58 percent and 12 percent of the Company's inventories were accounted for under the LIFO, FIFO and average cost methods, respectively. At December 31, 2019, approximately 32 percent, 58 percent and 10 percent of the Company's inventories were accounted for under the LIFO, FIFO and average cost methods, respectively. The Company routinely exchanges and swaps raw materials and finished goods with other companies to reduce delivery time, freight and other transportation costs. These transactions are treated as non-monetary exchanges and are valued at cost. Property Land, buildings and equipment are carried at cost less accumulated depreciation or amortization. Property under finance lease agreements is carried at the present value of lease payments over the lease term less accumulated amortization. Depreciation is based on the estimated service lives of depreciable assets and is calculated using the straight-line method. Fully depreciated assets are retained in property and accumulated depreciation accounts until they are removed from service. In the case of disposals, assets and related accumulated depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in income. Impairment and Disposal of Long-Lived Assets The Company evaluates long-lived assets and certain identifiable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When undiscounted future cash flows are not expected to be sufficient to recover an asset’s carrying amount, the asset is written down to its fair value based on bids received from third parties or a discounted cash flow analysis based on market participant assumptions. Long-lived assets to be disposed of by sale, if material, are classified as held for sale and reported at the lower of carrying amount or fair value less cost to sell, and depreciation is ceased. Long-lived assets to be disposed of other than by sale are classified as held and used until they are disposed of and reported at the lower of carrying amount or fair value, and depreciation is recognized over the remaining useful life of the assets. Goodwill and Other Intangible Assets The Company records goodwill when the purchase price of a business combination exceeds the estimated fair value of net identified tangible and intangible assets acquired. Goodwill is tested for impairment at the reporting unit level annually in the fourth quarter, or more frequently when events or changes in circumstances indicate that the fair value of a reporting unit has more likely than not declined below its carrying value. When testing goodwill for impairment, the Company may first assess qualitative factors. If an initial qualitative assessment identifies that it is more likely than not that the fair value of a reporting unit is less than its carrying value, additional quantitative testing is performed. The Company may also elect to skip the qualitative testing and proceed directly to the quantitative testing. If the quantitative testing indicates that goodwill is impaired, an impairment charge is recognized based on the difference between the reporting unit's carrying value and its fair value. The Company primarily utilizes a discounted cash flow methodology to calculate the fair value of its reporting units. Finite-lived intangible assets such as developed technology, customer-related, trademarks, tradenames and software, are amortized over their estimated useful lives, generally on a straight-line basis for periods ranging primarily from 3 to 20 years. Indefinite-lived intangible assets are reviewed for impairment or obsolescence annually, or more frequently when events or changes in circumstances indicate that the carrying amount of an intangible asset may not be recoverable. If impaired, intangible assets are written down to fair value based on discounted cash flows. Asset Retirement Obligations The Company records asset retirement obligations as incurred and reasonably estimable, including obligations for which the timing and/or method of settlement are conditional on a future event that may or may not be within the control of the Company. The fair values of obligations are recorded as liabilities on a discounted basis and are accreted over time for the change in present value. Costs associated with the liabilities are capitalized and amortized over the estimated remaining useful life of the asset, generally for periods of 10 years or less. Investments Investments in debt securities, primarily held by the Company's insurance operations, are classified as trading, available-for-sale or held-to-maturity. Investments classified as trading are reported at fair value with unrealized gains and losses related to mark-to-market adjustments included in income. Those classified as available-for-sale are reported at fair value with unrealized gains and losses recorded in AOCL. Those classified as held-to-maturity are recorded at amortized cost. The cost of investments sold is determined by FIFO or specific identification. Investments in equity securities with a readily determinable fair value are reported at fair value with unrealized gains and losses related to mark-to-market adjustments included in income. Equity securities without a readily determinable fair value are accounted for at cost, adjusted for impairments and observable price changes in orderly transactions. The Company routinely reviews its investments for declines in fair value below the cost basis. When events or changes in circumstances indicate the carrying value of an asset may not be recoverable, the security is written down, establishing a new cost basis. Leases The Company determines whether a contract contains a lease at contract inception. A contract contains a lease if there is an identified asset and the Company has the right to control the asset. Operating lease right-of-use (“ROU”) assets represent the Company's right to use an underlying asset for the lease term, and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Operating lease ROU assets and lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term. The Company uses the incremental borrowing rate in determining the present value of lease payments, unless the implicit rate is readily determinable. If lease terms include options to extend or terminate the lease, the ROU asset and lease liability are measured based on the reasonably certain decision. Leases with a term of 12 months or less at the commencement date are not recognized on the balance sheet and are expensed as incurred. The Company has lease agreements with lease and non-lease components, which are accounted for as a single lease component for nearly all classes of leased assets for which the Company is the lessee. Additionally, for certain equipment leases, the portfolio approach is applied to account for the operating lease ROU assets and lease liabilities. In the consolidated statements of income, lease expense for operating lease payments is recognized on a straight-line basis over the lease term. For finance leases, interest expense is recognized on the lease liability and the ROU asset is amortized over the lease term. Some leasing arrangements require variable payments that are dependent upon usage or output, or may vary for other reasons, such as insurance or tax payments. Variable lease payments are recognized as incurred and are not presented as part of the ROU asset or lease liability. See Note 17 for additional information. Revenue The Company recognizes revenue when its customer obtains control of promised goods or services in an amount that reflects the consideration which the Company expects to receive in exchange for those goods or services. To determine revenue recognition, the Company performs the following five steps: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract and (5) recognize revenue when (or as) the entity satisfies a performance obligation. See Note 4 for additional information. Revenue related to the Company's insurance operations includes third-party insurance premiums, which are earned over the terms of the related insurance policies and reinsurance contracts. Severance Costs The Company routinely reviews its operations around the world in an effort to ensure competitiveness across its businesses and geographic regions. When the reviews result in a workforce reduction related to the shutdown of facilities or other optimization activities, severance benefits are provided to employees primarily under the Company’s ongoing benefit arrangements. These severance costs are accrued once management commits to a plan of termination and it becomes probable that employees will be entitled to benefits at amounts that can be reasonably estimated. Integration and Separation Costs The Company classifies expenses related to the Merger and separation and the ownership restructure of Dow Silicones as "Integration and separation costs" in the consolidated statements of income. Merger and separation related costs include: post-Merger integration expenses, costs incurred for the separation of AgCo and SpecCo and costs related to the integration of ECP. The Dow Silicones-related costs include integration expenses incurred after the close of the ownership restructure. Integration and separation costs primarily consist of financial adviser, information technology, legal, accounting, consulting and other professional advisory fees associated with preparation and execution of these activities. Integration and separation costs related to the Dow Silicones ownership restructure were completed as of May 31, 2018. Integration and separation costs related to the Merger and separation were completed as of December 31, 2020. Income Taxes The Company accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences of temporary differences between the carrying amounts and tax bases of assets and liabilities using enacted tax rates. The effect of a change in tax rates on deferred tax assets or liabilities is recognized in income in the period that includes the enactment date. The Company uses the portfolio approach for releasing income tax effects from AOCL. Effective with the Merger, TDCC and Historical DuPont were subsidiaries of DowDuPont. Prior to the separation, TDCC was included in DowDuPont's consolidated tax groups and related income tax returns within certain jurisdictions. The Company recorded a separate tax liability for its share of the taxable income and tax attributes and obligations on DowDuPont’s consolidated income tax returns following a formula consistent with the economic sharing of tax attributes and obligations. The Company and Historical DuPont computed the amount due to DowDuPont for their share of taxable income and tax attributes and obligations on DowDuPont’s consolidated tax return. The amounts reported as income tax payable or receivable represent the Company’s payment obligation (or refundable amount) to DowDuPont based on a theoretical tax liability calculated based on the methodologies agreed, elected or required in each combined or consolidated filing jurisdiction. Since April 1, 2019, the Company no longer has consolidated income tax return filings with Historical DuPont entities. The Company recognizes the financial statement effects of an uncertain income tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. The Company accrues for other tax contingencies when it is probable that a liability to a taxing authority has been incurred and the amount of the contingency can be reasonably estimated. The current portion of uncertain income tax positions is included in “Income taxes payable” and the long-term portion is included in “Other noncurrent obligations” in the consolidated balance sheets. Provision is made for taxes on undistributed earnings of foreign subsidiaries and related companies to the extent that such earnings are not deemed to be permanently invested. Earnings per Common Share The calculation of earnings per common share is based on the weighted-average number of the Company's common shares outstanding for the applicable period. The calculation of diluted earnings per common share reflects the effect of all potential common shares that were outstanding during the respective periods, unless the effect of doing so is antidilutive. Adoption of Accounting Standards 2019 Effective January 1, 2019, the Company adopted Accounting Standards Update ("ASU") 2016-02, “Leases (Topic 842),” and the associated ASUs (collectively, "Topic 842") and added the accounting policy on leases discussed in the section above. Adoption of the new standard resulted in the recording of operating lease ROU assets and lease liabilities of $2.3 billion at January 1, 2019. The net impact to “Retained earnings” was an increase of $32 million and was primarily a result of the recognition of a deferred gain associated with a prior sale-leaseback transaction. The impact is reflected in the "Adoption of accounting standards" line in the consolidated statements of equity of both Dow Inc. and TDCC. See Note 17 for additional information. In addition, the consolidated financial statements reflect the impact of the adoption of ASU 2014-09, "Revenue from Contracts with Customers (Topic 606)," and the associated ASUs (collectively, "Topic 606") at January 1, 2019 by certain nonconsolidated affiliates of the Company, which were subsequently distributed as part of the separation from DowDuPont. The net impact was reflected in assets and liabilities of discontinued operations with a corresponding reduction to "Retained earnings" of $183 million in the consolidated balance sheets at January 1, 2019. The impact is reflected in the "Adoption of accounting standards" line in the consolidated statements of equity of both Dow Inc. and TDCC. 2018 The adoption of Topic 606, ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2016-16, "Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory" in the first quarter of 2018 resulted in a net decrease of $68 million to "Retained earnings" and a decrease of $20 million to AOCL in the consolidated statements of equity at January 1, 2018. In the second quarter of 2018, the Company early adopted ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("ASU 2018-02")." The adoption of this standard resulted in a $1,057 million increase to "Retained earnings" due to the reclassification from AOCL in the consolidated statements of equity at April 1, 2018. The impacts are reflected in the "Adoption of accounting standards" line in the consolidated statements of equity. Change in Financial Statement Presentation Consolidated Balance Sheets In 2020, the Company elected to reclassify "Marketable securities" to "Other current assets" in the consolidated balance sheets and, as a result, the prior period amounts have been reclassified to conform to current year presentation. Changes made to the consolidated balance sheets were as follows: Changes to the Consolidated Balance Sheets Dec 31, 2019 Dow Inc. TDCC In millions As Filed Updated As Filed Updated Marketable securities $ 21 $ — $ 21 $ — Other current assets $ 658 $ 679 $ 571 $ 592 TDCC Dividends

RECENT ACCOUNTING GUIDANCE

RECENT ACCOUNTING GUIDANCE	12 Months Ended
	Dec. 31, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
RECENT ACCOUNTING GUIDANCE	RECENT ACCOUNTING GUIDANCE Recently Adopted Accounting Guidance In the first quarter of 2020, the Company adopted ASU 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement," which is part of the Financial Accounting Standards Board's ("FASB") disclosure framework project to improve the effectiveness of disclosures in the notes to the financial statements. The amendments in the new guidance remove, modify and add certain disclosure requirements related to fair value measurements covered in Topic 820, "Fair Value Measurement," with certain requirements applied prospectively and all other requirements applied retrospectively. The adoption of this guidance did not have a material impact on the consolidated financial statements. See Note 23 for additional information. In the first quarter of 2020, the Company adopted 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," which requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Topic 350, "Intangibles - Goodwill and Other" to determine which implementation costs to capitalize as assets or expense as incurred. The Company elected to apply the standard prospectively and the adoption of this guidance did not have a material impact on the consolidated financial statements. In the first quarter of 2020, the Company adopted ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments" and the associated ASUs. The amendments replace the 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. Accordingly, companies are required to consider forward-looking information to estimate credit losses expected to occur over the estimated life of an asset, including losses that may be incurred in future periods. The amendments in the standard required application through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The adoption of this guidance did not have a material impact on the consolidated financial statements. In the third quarter of 2020, the Company adopted ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” The amendments provide optional expedients and exceptions for applying generally accepted accounting principles to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The new standard is effective March 12, 2020 through December 31, 2022, with the adoption date dependent upon the Company’s election. The Company has elected to apply the optional expedients and exceptions provided by the new guidance as modifications are made to relevant contracts, hedging relationships and other transactions during the reference rate reform transition period. As the amendments are intended to ease the potential burden in accounting for, or recognizing the effects of, reference rate reform on financial reporting, the application of this guidance has not and will not have a material impact on the consolidated financial statements. Accounting Guidance Issued But Not Adopted at December 31, 2020 In December 2019, the FASB issued ASU 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes." The amendments simplify the accounting for income taxes by removing certain exceptions to the general principles of Topic 740, "Income Taxes" and also improve consistent application by clarifying and amending existing guidance. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption is permitted, with the amendments to be applied on a retrospective, modified retrospective or prospective basis, depending on the specific amendment. The Company will adopt the new guidance in the first quarter of 2021 and the adoption of this guidance is not expected to have a material impact on the consolidated financial statements.

SEPARATION FROM DOWDUPONT SEPAR

SEPARATION FROM DOWDUPONT SEPARATION FROM DOWDUPONT	12 Months Ended
	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
Separation from DowDuPont [Text Block]	SEPARATION FROM DOWDUPONT Effective August 31, 2017, TDCC and Historical DuPont completed the merger of equals transaction contemplated by the Merger Agreement, by and among TDCC, Historical DuPont, DowDuPont, Diamond Merger Sub, Inc. and Orion Merger Sub, Inc. Pursuant to the Merger Agreement, (i) Diamond Merger Sub, Inc. was merged with and into TDCC, with TDCC surviving the merger as a subsidiary of DowDuPont (the "Diamond Merger") and (ii) Orion Merger Sub, Inc. was merged with and into Historical DuPont, with Historical DuPont surviving the merger as a subsidiary of DowDuPont (the "Orion Merger" and, together with the Diamond Merger, the "Mergers"). Following the consummation of the Mergers, each of TDCC and Historical DuPont became subsidiaries of DowDuPont. Subsequent to the Merger, TDCC and Historical DuPont engaged in a series of internal reorganization and realignment steps to realign their businesses into three subgroups: agriculture, materials science and specialty products. Dow Inc. was formed as a wholly owned subsidiary of DowDuPont to serve as the holding company for the materials science business. On April 1, 2019, DowDuPont completed the previously announced separation of its materials science business. The separation was effected by way of a pro rata distribution of all of the then-issued and outstanding shares of Dow Inc. common stock to DowDuPont stockholders of record as of the close of business, Eastern Time, on March 21, 2019 (the “Record Date”). The shareholders of record of DowDuPont received one share of Dow Inc. common stock, par value $0.01 per share, for every three shares of DowDuPont common stock, par value $0.01 per share, held as of the Record Date ("Distribution Ratio"). No fractional shares of Dow Inc. common stock were issued. Instead, cash in lieu of any fractional shares was paid to DowDuPont registered shareholders. The number of shares of Dow Inc. common stock issued on April 1, 2019 was 748.8 million shares. Dow Inc. is now an independent, publicly traded company and Dow Inc. common stock is listed on the NYSE under the symbol “DOW.” Dow Inc. common stock began regular-way trading on April 2, 2019, the first day following the distribution. Effective April 1, 2019, TDCC became a wholly owned subsidiary of Dow Inc. As of the effective date and time of the distribution, DowDuPont did not beneficially own any equity interest in Dow and no longer consolidated Dow and its consolidated subsidiaries into its financial results. Beginning in the second quarter of 2019, Dow’s consolidated financial results reflect the results of Dow Inc. and its consolidated subsidiaries - that is, TDCC after giving effect to the distribution of AgCo and SpecCo and the receipt of ECP. The consolidated financial results of Dow for periods prior to April 1, 2019, reflect the distribution of AgCo and SpecCo as discontinued operations for each period presented as well as reflect the receipt of ECP as a common control transaction from the closing of the Merger on August 31, 2017. On April 1, 2019, Dow Inc. received a cash contribution of $2,024 million from DowDuPont as part of the internal reorganization and business realignment steps between Dow Inc., TDCC and DowDuPont. Dow Inc. recognized a reduction to "Retained earnings" of $14,806 million in 2019 as a result of the cash contribution, the distribution of AgCo and SpecCo, and other separation related adjustments. TDCC recognized a reduction to "Retained earnings" of $16,009 million in 2019 as a result of the distribution of AgCo and SpecCo. Receipt of ECP As the receipt of ECP was accounted for as a transfer between entities under common control, the consolidated financial statements have been retrospectively adjusted to reflect the receipt of ECP from the closing of the Merger on August 31, 2017. All intercompany transactions have been eliminated in consolidation. Distribution of AgCo and SpecCo Upon distribution, the Company retrospectively adjusted the previously issued consolidated financial statements and presented AgCo and SpecCo as discontinued operations based on the guidance in ASC 205-20 “Discontinued Operations” (“ASC 205-20”). The results of operations of AgCo and SpecCo are presented as discontinued operations in the consolidated statements of income and are summarized in the following table: Results of Operations of AgCo and SpecCo 2019 1 2018 In millions Net sales $ 2,953 $ 12,187 Cost of sales 1,804 7,668 Research and development expenses 175 761 Selling, general and administrative expenses 262 1,108 Amortization of intangibles 61 249 Restructuring and asset related charges - net 78 411 Equity in earnings of nonconsolidated affiliates 28 400 Sundry income (expense) - net (18) (13) Interest income 3 26 Interest expense and amortization of debt discount 7 56 Income from discontinued operations before income taxes $ 579 $ 2,347 Provision for income taxes 134 512 Income from discontinued operations, net of tax $ 445 $ 1,835 1. Results through March 31, 2019. Agreements Related to the Separation and Distribution In connection with the separation, Dow Inc. entered into certain agreements with DuPont and/or Corteva, Inc. ("Corteva"), including the following: Separation and Distribution Agreement, Tax Matters Agreement and Employee Matters Agreement (collectively, the "Agreements"). In addition to establishing the terms of the separation, the Agreements provide a framework for Dow’s interaction with DuPont and Corteva after the separation and also provide for the allocation among Dow, DuPont and Corteva of assets, liabilities and obligations attributable to periods prior to, at and after the completion of the separation. The Agreements also contain certain indemnity and/or cross-indemnity provisions that are intended to set forth each party’s respective rights, responsibilities and obligations for matters subject to indemnification. Except in certain instances, the parties’ indemnification obligations are uncapped. Certain indemnification obligations will be subject to reduction by insurance proceeds or other third-party proceeds of the indemnified party that reduces the amount of the loss. In addition, indemnifiable losses will be subject to, in certain cases, “de minimis” threshold amounts and, in certain cases, deductible amounts. The impacts of indemnifications and other post-separation matters relating to the Agreements are primarily reflected in the consolidated financial statements of Dow Inc. In 2019, the Company recorded pretax charges related to the Agreements of $24 million in "Integration and separation costs" and $69 million in "Sundry income (expense) - net" in the consolidated statements of income of Dow Inc., related to Corporate. At December 31, 2020, the Company had assets of $77 million ($58 million at December 31, 2019) included in "Other current assets" and $33 million ($52 million at December 31, 2019) included in "Noncurrent receivables" and liabilities of $412 million ($352 million at December 31, 2019) included in "Accrued and other current liabilities" and $46 million ($96 million at December 31, 2019) included in "Other noncurrent obligations" in the consolidated balance sheets of Dow Inc. related to the Agreements. Any adjustments to these assets and liabilities in subsequent periods will be recorded in Dow Inc.'s results of operations. In addition, the Company deferred approximately $400 million of the cash distribution received from DowDuPont at separation and recorded an associated liability with an offset to "Retained earnings" in the consolidated balance sheets of Dow Inc. At December 31, 2020, $103 million ($130 million at December 31, 2019) of this liability was recorded in "Accrued and other current liabilities" and $96 million ($270 million at December 31, 2019) was recorded in "Other noncurrent obligations" in the consolidated balance sheets of Dow Inc. Based on notices received in the fourth quarter of 2020, Dow Inc. reversed $177 million of the liability and the impact is reflected in the "Common control transaction" line in the consolidated statements of equity of Dow Inc. The final resolution of the remaining liability is uncertain and any subsequent adjustments to the carrying value of this liability will be reflected in equity of Dow Inc. In 2020, Dow Inc. made net cash payments of $18 million ($215 million in 2019) related to the Agreements, recorded in "Cash flows from operating activities - discontinued operations" in the Dow Inc. consolidated statements of cash flows. The Company also received $98 million in 2019 related to the Agreements, recorded in "Other assets and liabilities, net" within "Cash flows from operating activities - continuing operations" in the Dow Inc. consolidated statements of cash flows. Continuing Involvement The Company has certain product and service agreements with DuPont and Corteva that were considered intercompany transactions prior to the separation, but are trade transactions subsequent to the separation. These transactions have been retrospectively reclassified as trade transactions in the consolidated financial statements. Based on the Company’s assessment of the specific factors identified in ASC Topic 205, “Presentation of Financial Statements,” the Company concluded that these agreements do not constitute significant continuing involvement in AgCo or SpecCo. Integration and Separation Costs Integration and separation costs, which reflect costs related to post-Merger integration and business separation activities, as well as the ownership restructure of Dow Silicones (through May 31, 2018), were $239 million in 2020, compared with $1,063 million and $1,039 million for Dow Inc. and TDCC, respectively, in 2019 and $1,179 million in 2018. Integration and separation costs related to post-Merger integration and business separation activities were completed as of December 31, 2020.

REVENUE

REVENUE	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
REVENUE	REVENUE The majority of the Company's revenue is derived from product sales. In 2020, 99 percent of the Company's revenue related to product sales (98 percent in 2019 and 99 percent in 2018). The remaining sales were primarily related to the Company's insurance operations and licensing of patents and technologies. Product Sales Product sales consist of sales of the Company's products to manufacturers and distributors. The Company considers order confirmations or purchase orders, which in some cases are governed by master supply agreements, to be contracts with a customer. Product sale contracts are generally short-term contracts where the time between order confirmation and satisfaction of all performance obligations is less than one year. However, the Company has some long-term contracts which can span multiple years. Revenues from product sales are recognized when the customer obtains control of the product, which occurs at a point in time, usually upon shipment, with payment terms typically in the range of 30 to 60 days after invoicing, depending on business and geographic region. When the Company performs shipping and handling activities after the transfer of control to the customer (e.g., when control transfers prior to shipment), these are considered fulfillment activities, and accordingly, the costs are accrued when the related revenue is recognized. Taxes collected from customers relating to product sales and remitted to governmental authorities are excluded from revenues. The Company elected to use the practical expedient to expense cash and non-cash sales incentives, as the amortization period for the costs to obtain the contract would have been one year or less. Certain long-term contracts include a series of distinct goods that are delivered continuously to the customer through a pipeline (e.g., feedstocks). For these types of product sales, the Company invoices the customer in an amount that directly corresponds with the value to the customer of the Company’s performance to date. As a result, the Company recognizes revenue based on the amount billable to the customer in accordance with the right to invoice practical expedient. The transaction price includes estimates for reductions in revenue from customer rebates and right of returns on product sales. These amounts are estimated based upon the most likely amount of consideration to which the customer will be entitled. All estimates are based on historical experience, anticipated performance and the Company’s best judgment at the time to the extent it is probable that a significant reversal of revenue recognized will not occur. All estimates for variable consideration are reassessed periodically. The Company elected the practical expedient to not adjust the amount of consideration for the effects of a significant financing component for all instances in which the period between payment and transfer of the goods will be one year or less. For contracts with multiple performance obligations, the Company allocates the transaction price to each performance obligation based on the relative standalone selling price. The standalone selling price is the observable price which depicts the price as if sold to a similar customer in similar circumstances. Patents, Trademarks and Licenses The Company enters into licensing arrangements in which it licenses certain rights of its patents and technology to customers. Revenue from the majority of the Company’s licenses for patents and technology is derived from sales-based royalties. The Company estimates the amount of sales-based royalties it expects to be entitled to based on historical sales to the customer. For the remaining revenue from licensing arrangements, payments are typically received from the Company's licensees based on billing schedules established in each contract. Revenue is recognized when the performance obligation is satisfied. Remaining Performance Obligations Remaining performance obligations represent the transaction price allocated to unsatisfied or partially unsatisfied performance obligations. At December 31, 2020, the Company had unfulfilled performance obligations of $977 million ($826 million at December 31, 2019) related to the licensing of technology and expects revenue to be recognized for the remaining performance obligations over the next seven years. The remaining performance obligations are for product sales that have expected durations of one year or less, product sales of materials delivered through a pipeline for which the Company has elected the right to invoice practical expedient, or variable consideration attributable to royalties for licenses of patents and technology. The Company has received advance payments from customers related to long-term supply agreements that are deferred and recognized over the life of the contract, with remaining contract terms that range up to 21 years. The Company will have rights to future consideration for revenue recognized when product is delivered to the customer. These payments are included in "Accrued and other current liabilities" and "Other noncurrent obligations" in the consolidated balance sheets. Disaggregation of Revenue Dow disaggregates its revenue from contracts with customers by operating segment and business, as the Company believes it best depicts the nature, amount, timing and uncertainty of its revenue and cash flows. See details in the tables below: Net Trade Sales by Segment and Business 2020 2019 2018 In millions Hydrocarbons & Energy $ 4,271 $ 5,357 $ 7,587 Packaging and Specialty Plastics 14,030 14,888 16,608 Packaging & Specialty Plastics $ 18,301 $ 20,245 $ 24,195 Industrial Solutions $ 3,929 $ 4,310 $ 4,812 Polyurethanes & Construction Chemicals 8,080 9,117 10,615 Others 12 13 20 Industrial Intermediates & Infrastructure $ 12,021 $ 13,440 $ 15,447 Coatings & Performance Monomers $ 3,258 $ 3,517 $ 3,979 Consumer Solutions 4,693 5,406 5,698 Performance Materials & Coatings $ 7,951 $ 8,923 $ 9,677 Corporate $ 269 $ 343 $ 285 Total $ 38,542 $ 42,951 $ 49,604 Net Trade Sales by Geographic Region 2020 2019 2018 In millions U.S. & Canada $ 13,582 $ 15,549 $ 17,809 EMEAI 1 12,969 14,612 17,406 Asia Pacific 8,165 8,676 9,404 Latin America 3,826 4,114 4,985 Total $ 38,542 $ 42,951 $ 49,604 1. Europe, Middle East, Africa and India. Contract Assets and Liabilities The Company receives payments from customers based upon contractual billing schedules. Accounts receivable are recorded when the right to consideration becomes unconditional. Contract assets include amounts related to the Company’s contractual right to consideration for completed performance obligations not yet invoiced. Contract liabilities include payments received in advance of performance under the contract and are recognized in revenue when the performance obligations are met. "Contract liabilities - current" primarily reflects deferred revenue from prepayments from customers for product to be delivered in 12 months or less. "Contract liabilities - noncurrent" includes advance payments that the Company has received from customers related to long-term supply agreements and royalty payments that are deferred and recognized over the life of the contract. Revenue recognized in 2020 from amounts included in contract liabilities at the beginning of the period was approximately $145 million (approximately $145 million in 2019 and $205 million in 2018). In 2020, the amount of contract assets reclassified to receivables as a result of the right to the transaction consideration becoming unconditional was approximately $25 million (approximately $15 million in 2019). The Company did not recognize any asset impairment charges related to contract assets in 2020, 2019, or 2018. The following table summarizes the contract assets and liabilities at December 31, 2020 and 2019: Contract Assets and Liabilities at Dec 31 2020 2019 In millions Accounts and notes receivable - Trade $ 4,839 $ 4,844 Contract assets - current 1 $ 58 $ 41 Contract assets - noncurrent 2 $ 11 $ 4 Contract liabilities - current 3 $ 349 $ 193 Contract liabilities - noncurrent 4 $ 1,915 $ 1,607 1. Included in "Other current assets" in the consolidated balance sheets. 2. Included in "Deferred charges and other assets" in the consolidated balance sheets. 3. Included in "Accrued and other current liabilities" in the consolidated balance sheets. The increase from December 31, 2019 to December 31, 2020 was primarily due to advance payments from customers related to royalty agreements. 4. Included in "Other noncurrent obligations" in the consolidated balance sheets. The increase from December 31, 2019 to December 31, 2020 was due to an advance payment from a customer related to a long-term product supply agreement.

DIVESTITURES

DIVESTITURES	12 Months Ended
	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
DIVESTITURES	DIVESTITURES Divestiture of Rail Infrastructure Operations and Assets On September 30, 2020, TDCC sold its rail infrastructure operations and assets, including existing agreements to provide rail services to unrelated third parties, at six sites in the U.S. & Canada to an affiliate of Watco Companies, L.L.C. for cash proceeds of $303 million, net of costs to sell and other adjustments and subject to customary post-closing adjustments. These assets are located at TDCC’s sites in Plaquemine and St. Charles, Louisiana; Freeport and Seadrift, Texas; and Fort Saskatchewan and Prentiss, Alberta, Canada. Divested operations included property with a net book value of $68 million and goodwill of $2 million ($16 million related to Packaging & Specialty Plastics and $54 million related to Corporate). TDCC retained ownership of the sites and underlying real property where the divested operations are located. TDCC and the buyer entered into mutual long-term service agreements designed to ensure the continuation of rail services for TDCC's existing operations at each site. The rail-service agreements include variable fees that have an initial term of 25 years. TDCC recognized a pretax gain of $233 million on the sale ($48 million related to Packaging & Specialty Plastics and $185 million related to Corporate), included in "Sundry income (expense) - net" in the consolidated statements of income. The Company evaluated the divestiture of the rail infrastructure operations and assets and determined it did not represent a strategic shift that had a major effect on the Company’s operations and financial results and did not qualify as an individually significant component of the Company. As a result, the divestiture is not reported as discontinued operations. Divestiture of Marine and Terminal Operations and Assets On December 1, 2020, TDCC sold certain U.S. Gulf Coast marine and terminal operations and assets, including existing agreements to provide marine and terminal services to unrelated third parties, at three U.S. sites to an affiliate of Royal Vopak for cash proceeds of $600 million, net of costs to sell and other adjustments and subject to customary post-closing adjustments. These assets are located at TDCC's sites in Plaquemine and St. Charles, Louisiana, and Freeport, Texas. Divested operations included property with a net book value of $93 million and goodwill of $8 million ($7 million related to Packaging & Specialty Plastics, $17 million related to Industrial Intermediates & Infrastructure and $77 million related to Corporate). TDCC retained ownership of the sites and the underlying real property where the divested operations are located. TDCC and the buyer entered into mutual long-term service agreements designed to ensure the continuation of marine and terminal services for TDCC's existing operations at each site. The marine and terminal service agreements include fixed and variable fees that have initial terms of up to 25 years. In the fourth quarter of 2020, TDCC recognized a pretax gain of $499 million on the sale ($17 million related to Packaging & Specialty Plastics, $61 million related to Industrial Intermediates & Infrastructure and $421 million related to Corporate), included in "Sundry income (expense) - net" in the consolidated statements of income. The Company evaluated the divestiture of the marine and terminal operations and assets and determined it did not represent a strategic shift that had a major effect on the Company’s operations and financial results and did not qualify as an individually significant component of the Company. As a result, the divestiture is not reported as discontinued operations.

RESTRUCTURING, GOODWILL IMPAIRM

RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET	12 Months Ended
	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET	RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET The "Restructuring, goodwill impairment and asset related charges - net" line in the consolidated statements of income is used to record charges for restructuring programs, goodwill impairments, and other asset related charges, which includes other asset impairments. Restructuring Programs 2020 Restructuring Program On September 29, 2020, the Board of Dow Inc. approved restructuring actions to achieve the Company's structural cost improvement initiatives in response to the continued economic impact from the coronavirus disease 2019 ("COVID-19") pandemic. The restructuring program is designed to reduce structural costs and enable the Company to further enhance competitiveness while the COVID-19 economic recovery gains traction. This program includes a global workforce cost reduction of approximately 6 percent and actions to rationalize the Company's manufacturing assets, which include asset write-down and write-off charges, related contract termination fees and environmental remediation costs ("2020 Restructuring Program"). These actions are expected to be substantially complete by the end of 2021. As a result of these actions, in the third quarter of 2020 the Company recorded pretax restructuring charges of $575 million, consisting of severance and related benefit costs of $297 million, asset write-downs and write-offs of $197 million and costs associated with exit and disposal activities of $81 million. The impact of these charges is shown as "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income. In the fourth quarter of 2020, the Company recorded net favorable pretax restructuring credits of $1 million related to asset write-downs and write-offs and $1 million related to costs associated with exit and disposal activities (related to Performance Materials & Coatings and Corporate). The adjustment to costs associated with exit and disposal activities included curtailment costs associated with a defined benefit pension plan. See Note 20 for additional information. The following table summarizes the activities related to the 2020 Restructuring Program: 2020 Restructuring Program Severance and Related Benefit Costs Asset Write-downs and Write-offs Costs Associated with Exit and Disposal Activities Total In millions Packaging & Specialty Plastics $ — $ 11 $ — $ 11 Industrial Intermediates & Infrastructure — 22 — 22 Performance Materials & Coatings — 116 61 177 Corporate 297 47 19 363 Total restructuring charges $ 297 $ 196 $ 80 $ 573 Charges against the reserve — (196) (5) (201) Cash payments (8) — — (8) Reserve balance at Dec 31, 2020 $ 289 $ — $ 75 $ 364 At December 31, 2020, $227 million of the reserve balance was included in "Accrued and other current liabilities" and $137 million was included in "Other noncurrent obligations" in the consolidated balance sheets. Severance and Related Benefit Costs Severance benefits are provided to employees primarily under Dow's ongoing benefit arrangements and are accrued against the Corporate segment once management commits to a plan of termination. The 2020 Restructuring Program included a charge for severance and related benefit costs of $297 million for a global workforce cost reduction of approximately 6 percent, with separations occurring primarily through the end of 2021, and impacting Corporate. At December 31, 2020, $8 million in severance payments had been made. Asset Write-downs and Write-offs The 2020 Restructuring Program included charges related to the write-down and write-off of assets totaling $196 million. Details regarding the asset write-downs and write-offs are as follows: • Packaging & Specialty Plastics recorded a charge of $11 million to rationalize its production capacity by shutting down a small-scale production unit. The production unit will be shut down by the end of the third quarter of 2022. • Industrial Intermediates & Infrastructure recorded a charge of $22 million to rationalize its asset footprint by shutting down certain amines and solvents facilities in the United States and Europe as well as select, small-scale downstream polyurethanes manufacturing facilities. The facilities will be shut down by the end of 2021. • Performance Materials & Coatings recorded a charge of $116 million to shut down manufacturing assets, primarily related to small-scale coatings reactors, and will also rationalize its upstream asset footprint in Europe and the U.S. & Canada by adjusting the supply of siloxane and silicon metal to balance to regional needs. The impacted facilities will be shut down by the end of 2021. • Corporate recorded a charge of $47 million related to the write-down of leased, non-manufacturing facilities and the write-down of miscellaneous assets. Costs Associated with Exit and Disposal Activities The 2020 Restructuring Program included charges of $80 million for costs associated with exit and disposal activities, which included $19 million for contract termination fees related to the asset actions listed above, impacting Performance Materials & Coatings ($9 million) and Corporate ($10 million), as well as $56 million for environmental remediation, impacting Performance Materials & Coatings ($52 million) and Corporate ($4 million) and $5 million related to curtailment costs associated with a defined benefit pension plan, impacting Corporate. DowDuPont Cost Synergy Program In September and November 2017, DowDuPont approved post-Merger restructuring actions under the DowDuPont Cost Synergy Program (the "Synergy Program") which was designed to integrate and optimize the organization following the Merger and in preparation for the business separations. The Company expected (prior to the impact of any discontinued operations) to record total pretax restructuring charges of approximately $1.3 billion, which included initial estimates of approximately $525 million to $575 million of severance and related benefit costs, $400 million to $440 million of asset write-downs and write-offs, and $290 million to $310 million of costs associated with exit and disposal activities. The restructuring charges below reflect charges from continuing operations. The impact of the charges are shown as "Restructuring, goodwill impairment and asset related charges ‑ net" in the consolidated statements of income. The Company recorded pretax restructuring charges of $184 million in 2018, consisting of severance and related benefit costs of $137 million, asset write-downs and write-offs of $33 million and costs associated with exit and disposal activities of $14 million. The Company recorded pretax restructuring charges of $292 million in 2019, consisting of severance and related benefit costs of $123 million, assets write-downs and write-offs of $143 million and costs associated with exit and disposal activities of $26 million. For the year ended December 31, 2020, the Company recorded pretax restructuring charges of $86 million for severance and related benefit costs. Cash expenditures related to the Synergy Program were substantially complete at December 31, 2020. The following table summarizes the activities related to the Synergy Program. At December 31, 2020, $21 million was included in "Accrued and other current liabilities" ($52 million at December 31, 2019) and $13 million ($19 million at December 31, 2019) was included in "Other noncurrent obligations" in the consolidated balance sheets. DowDuPont Synergy Program Severance and Related Benefit Costs Asset Write-downs and Write-offs Costs Associated with Exit and Disposal Activities Total In millions Reserve balance at Dec 31, 2017 $ 270 $ — $ 5 275 2018 restructuring charges Packaging & Specialty Plastics $ — $ 10 $ 3 $ 13 Industrial Intermediates & Infrastructure — — 11 11 Performance Materials & Coatings — 7 — 7 Corporate 137 16 — 153 Total 2018 restructuring charges $ 137 $ 33 $ 14 $ 184 Charges against the reserve — (33) — (33) Cash payments (197) — (12) (209) Reserve balance at Dec 31, 2018 $ 210 $ — $ 7 $ 217 2019 restructuring charges Packaging & Specialty Plastics $ — $ — $ 1 $ 1 Industrial Intermediates & Infrastructure — 2 5 7 Performance Materials & Coatings — 28 — 28 Corporate 123 113 20 256 Total 2019 restructuring charges $ 123 $ 143 $ 26 $ 292 Charges against the reserve — (143) — (143) Cash payments (279) — (16) (295) Reserve balance at Dec 31, 2019 $ 54 $ — $ 17 $ 71 2020 restructuring charges Corporate 90 — — 90 Total 2020 restructuring charges $ 90 $ — $ — $ 90 Charges against the reserve (4) — — (4) Cash payments (121) — (2) (123) Reserve balance at Dec 31, 2020 $ 19 $ — $ 15 $ 34 The Company recorded pretax restructuring charges of $961 million inception-to-date under the Synergy Program on a continuing operations basis, consisting of severance and related benefit costs of $653 million, asset write-downs and write-offs of $263 million and costs associated with exit and disposal activities of $45 million. Asset Write-downs and Write-offs The restructuring charges related to the write-down and write-off of assets in 2018 under the Synergy Program were as follows: • The Company recorded a charge of $33 million for other miscellaneous asset write-downs and write-offs, including the shutdown of several small manufacturing facilities and the write-off of leased, non-manufacturing assets and certain corporate facilities. The charge related to Packaging & Specialty Plastics ($10 million), Performance Materials & Coatings ($7 million) and Corporate ($16 million). These manufacturing facilities were shut down by the end of 2019. The restructuring charges related to the write-down and write-off of assets in 2019 under the Synergy Program were as follows: • The Company recorded a charge of $143 million for other miscellaneous asset write-downs and write-offs, including the shutdown of several small manufacturing facilities and the write-off of non-manufacturing assets and certain corporate facilities. The charge related to Industrial Intermediates & Infrastructure ($2 million), Performance Materials & Coatings ($28 million) and Corporate ($113 million). These manufacturing facilities were substantially shut down by the end of 2020. There were no restructuring charges related to the write-down and write-off of assets in 2020 under the Synergy Program. Costs Associated with Exit and Disposal Activities The restructuring charges for costs associated with exit and disposal activities, including contract cancellation penalties and environmental remediation liabilities, totaled $14 million in 2018, $26 million in 2019 and zero in 2020. The Company expects to incur additional costs in the future related to its restructuring activities. Future costs are expected to include demolition costs related to closed facilities and restructuring implementation costs. These costs will be recognized as incurred. The Company also expects to incur additional employee-related costs, including involuntary termination benefits, related to its other optimization activities. These costs cannot be reasonably estimated at this time. 2019 Goodwill Impairment Upon completion of the goodwill impairment testing in the fourth quarter of 2019, the Company determined the fair value of the Coatings & Performance Monomers reporting unit was lower than its carrying amount. As a result, the Company recorded an impairment charge of $1,039 million in the fourth quarter of 2019, included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Performance Materials & Coatings. See Note 13 for additional information. Asset Related Charges 2020 Charges In 2020, the Company recognized pretax impairment charges of $49 million, including additional pretax impairment charges for capital additions made to a bio-ethanol manufacturing facility in Santa Vitoria, Minas Gerais, Brazil ("Santa Vitoria"), which was impaired in 2017 and divested in 2020, as well as charges for miscellaneous write-offs and write-downs of non-manufacturing assets and the write-down of certain corporate leased equipment. The impairment charges were included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to Packaging & Specialty Plastics ($19 million), Performance Materials & Coatings ($15 million) and Corporate ($15 million). See Note 23 for additional information. 2019 Charges On August 13, 2019, the Company entered into a definitive agreement to sell its acetone derivatives business to ALTIVIA Ketones & Additives, LLC. The transaction closed on November 1, 2019 and included the Company's acetone derivatives related inventory and production assets, located in Institute, West Virginia, in addition to the site infrastructure, land, utilities and certain railcars. The Company remains at the Institute site as a tenant. As a result of the planned transaction, the Company recognized a pretax impairment charge of $75 million in the third quarter of 2019, included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Packaging & Specialty Plastics ($24 million) and Corporate ($51 million). See Note 23 for additional information. In the fourth quarter of 2019, upon completion of an evaluation of its equity method investment in Sadara Chemical Company ("Sadara") for other-than-temporary impairment, the Company determined that its investment in Sadara was other-than-temporarily impaired and it was written down to zero. Additionally, as part of Dow's evaluation of Sadara, the Company reserved certain of its notes and accounts receivable with Sadara due to uncertainty on the timing of collection. As a result, the Company recorded a $1,755 million charge related to Sadara, included in “Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Packaging & Specialty Plastics ($370 million), Industrial Intermediates & Infrastructure ($1,168 million) and Corporate ($217 million). See Notes 12 and 23 for additional information. In 2019, the Company recognized additional pretax impairment charges of $58 million related primarily to capital additions at Santa Vitoria. The impairment charges were included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to Packaging & Specialty Plastics ($44 million), Performance Materials & Coatings ($9 million) and Corporate ($5 million). See Note 23 for additional information. 2018 Charges In 2018, the Company recognized an additional pretax impairment charge of $34 million related primarily to capital additions at Santa Vitoria. The impairment charge was included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to the Packaging & Specialty Plastics segment. See Note 23 for additional information.

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION	12 Months Ended
	Dec. 31, 2020
Supplementary Information [Abstract]
SUPPLEMENTARY INFORMATION	SUPPLEMENTARY INFORMATION Sundry Income (Expense) – Net 1 Dow Inc. TDCC In millions 2020 2019 2018 2020 2019 2018 Non-operating pension and other postretirement benefit plan net credits 2 $ 103 $ 205 $ 123 $ 103 $ 205 $ 123 Foreign exchange gains (losses) (62) 91 (119) (65) 77 (119) Gain on divestiture of marine and terminal operations and assets 3 233 — — 233 — — Gain on divestiture of rail infrastructure operations and assets 3 499 — — 499 — — Loss on early extinguishment of debt 4 (149) (102) (54) (149) (102) (54) Gain (loss) on divestitures and asset sale 5 (15) (49) — (15) 2 — Gain related to Nova ethylene asset matter 6 544 170 — 544 170 — Gain on sales of other assets and investments 48 67 18 48 67 18 Dow Silicones breast implant liability adjustment 6 5 85 — 5 85 — Indemnification and other transaction related credits (costs) 7 (21) (69) — (11) 6 — Loss on Dow Silicones commercial creditor matters 6 — (50) — — (50) — Post-closing adjustments related to Dow Silicones ownership restructure — — (20) — — (20) Post-closing adjustments on divestiture of MEGlobal — — 20 — — 20 Other - net 84 113 128 82 113 128 Total sundry income (expense) – net $ 1,269 $ 461 $ 96 $ 1,274 $ 573 $ 96 1. Prior period amounts were updated to conform with the current year presentation. 2. See Note 20 for additional information. 3. See Note 5 for additional information. 4. See Note 15 for additional information. 5. The year ended December 31, 2020 primarily relates to a loss on the divestiture of a bio-ethanol manufacturing facility in Brazil, related to Packaging & Specialty Plastics. The year ended December 31, 2019 includes post-closing adjustments on previous divestitures, related to Corporate. 6. See Note 16 for additional information. 7. See Note 3 for additional information. Accrued and Other Current Liabilities “Accrued and other current liabilities” were $3,790 million and $3,256 million at December 31, 2020 and $2,762 million and $2,233 million at December 31, 2019, for Dow Inc. and TDCC, respectively. Accrued payroll, which is a component of "Accrued and other current liabilities" and includes liabilities related to payroll, incentive compensation and severance, was $866 million at December 31, 2020 and $284 million at December 31, 2019. No other components of "Accrued and other current liabilities" were more than 5 percent of total current liabilities. Other Investments The Company has investments in company-owned life insurance policies ("COLI"), which are recorded at their cash surrender value as of each balance sheet date, as provided below: Investments in Company-Owned Life Insurance Dec 31, 2020 Dec 31, 2019 In millions Gross cash value $ 807 $ 820 Less: Existing drawdowns 1 — 85 Investments in company-owned life insurance 2 $ 807 $ 735 1. Classified as "Proceeds from sales and maturities of investments" in the consolidated statements of cash flows. 2. Classified as "Other investments" in the consolidated balance sheets. The Company has the ability to monetize its investment in its COLI policies as an additional source of liquidity. At December 31, 2019, the Company had monetized $85 million of its existing COLI policies' value. In the first nine months of 2020, the Company monetized an additional $211 million. In the fourth quarter of 2020, the Company repaid all existing drawdowns against the cash surrender value, which resulted in no monetization of its existing COLI policies' value at December 31, 2020. The repayment was reflected in "Purchases of investments" in the consolidated statements of cash flows. Supplemental Cash Flow Information The following table shows cash paid for interest and income taxes for the years ended December 31, 2020, 2019 and 2018: Supplemental Cash Flow Information 2020 2019 2018 In millions Cash paid during year for: Interest $ 842 $ 993 $ 1,143 Income taxes $ 518 $ 881 $ 1,193

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The financial statements for Dow Inc. and TDCC are substantially similar, including the reporting of current and deferred tax expense (benefit), provision for income taxes on continuing operations, and deferred tax asset and liability balances. As a result, the following income tax discussion pertains to Dow Inc. only. Geographic Allocation of Income and Provision for Income Taxes on Continuing Operations In millions 2020 2019 2018 Income (loss) from continuing operations before income taxes Domestic 1 $ (681) $ (1,196) $ 745 Foreign 2 2,752 (51) 3,004 Income (loss) from continuing operations before income taxes $ 2,071 $ (1,247) $ 3,749 Current tax expense (benefit) Federal $ (176) $ (287) $ 324 State and local 4 25 13 Foreign 691 960 901 Total current tax expense $ 519 $ 698 $ 1,238 Deferred tax expense (benefit) Federal 3 $ 184 $ 52 $ (318) State and local 19 19 (32) Foreign 55 (299) (79) Total deferred tax expense (benefit) $ 258 $ (228) $ (429) Provision for income taxes on continuing operations $ 777 $ 470 $ 809 Income (loss) from continuing operations, net of tax $ 1,294 $ (1,717) $ 2,940 1. The 2019 amount includes approximately $1.4 billion of expense related to goodwill impairment and environmental matters. See Notes 13 and 16 for additional information. 2. The 2019 amount includes approximately $1.8 billion of expense for Sadara related charges. See Note 12 for additional information. 3. The 2018 amount reflects the tax impact of the Tax Cuts and Jobs Act which accelerated the utilization of tax credits and required remeasurement of all U.S. deferred tax assets and liabilities. Reconciliation to U.S. Statutory Rate 2020 2019 2018 Statutory U.S. federal income tax rate 21.0 % 21.0 % 21.0 % Equity earnings effect 0.2 (3.2) (3.3) Foreign income taxed at rates other than the statutory U.S. federal income tax rate 1 1.7 (14.8) 6.7 U.S. tax effect of foreign earnings and dividends 3.9 1.9 (0.7) Unrecognized tax benefits 3.3 1.0 0.2 Divestitures 2 (5.1) — 0.8 Changes in valuation allowances 12.6 — — Impact of tax reform 3 — 11.1 (3.4) Federal tax accrual adjustment 4 — 10.4 — State and local income taxes 0.3 (4.4) 0.4 Sadara related charges 5 — (29.5) — Goodwill impairment 6 — (17.5) — Other - net (0.4) (13.7) (0.1) Effective tax rate 37.5 % (37.7) % 21.6 % 1. Includes the impact of valuation allowances and interest and penalties associated with uncertain tax positions in foreign jurisdictions. The 2020 impact from interest and penalties increased the effective tax rate by approximately 4 percent. 2. The 2020 impact relates to the divestiture of a bio-ethanol manufacturing facility in Brazil. See Note 6 for additional information. 3. Includes the impact of tax reform in Switzerland and the United States. 4. Primarily related to the favorable impact of the restoration of tax basis in assets, driven by a court judgment that did not involve the Company. 5. See Note 12 for additional information. 6. See Note 13 for additional information. The Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was enacted on March 27, 2020 in the United States. While the CARES Act has had no significant impact on the Company's provision for income taxes on continuing operations in 2020, the Company filed a tax loss carryback claim for $291 million in accordance with the provisions of the CARES Act. This resulted in an increase in "Accounts and notes receivable - other" and a decrease in "Deferred income tax assets" in the consolidated balance sheets. In the fourth quarter of 2020, a valuation allowance of $260 million was recorded in the United States, primarily due to filing of the final combined Dow and DuPont tax return and related unutilized foreign tax credits. The Company projects it is more likely than not that a portion of these foreign tax credits and other tax attributes will remain unutilized prior to their expiration. On December 22, 2017, the Tax Cuts and Jobs Act ("The Act") was enacted. The Act reduced the U.S. federal corporate income tax rate from 35 percent to 21 percent, required companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously deferred, created new provisions related to foreign sourced earnings, eliminated the domestic manufacturing deduction and moved to a hybrid territorial system. While the Company made a reasonable estimate of the effects of The Act on its deferred tax balances and the one-time transition tax at December 31, 2017, in accordance with Staff Accounting Bulletin 118, the income tax effects of The Act were refined upon obtaining, preparing and analyzing additional information during the measurement period as follows: • In 2018, the Company completed the remeasurement of its U.S. federal deferred tax assets and liabilities based on rates at which they are expected to reverse in the future, which is generally 21 percent, and recorded a benefit of $79 million to “Provision for income taxes on continuing operations” in the consolidated statements of income with respect to the remeasurement of the Company's deferred tax balances. • The Company adjusted the impact of the mandatory deemed repatriation of post-1986 undistributed foreign earnings and profits, which resulted in a one-time transition tax, and recorded a benefit in 2018 of $85 million to "Provision for income taxes on continuing operations" in the consolidated statements of income with respect to the one-time transition tax. The Company had sufficient tax credits to offset the tax liability associated with the one-time transition tax. • In 2018, the Company recorded an indirect impact of The Act related to prepaid tax on the intercompany sale of inventory. The amount recorded related to inventory was a charge of $38 million to "Provision for income taxes on continuing operations" in the consolidated statements of income. Deferred Tax Balances at Dec 31 2020 2019 In millions Assets Liabilities Assets Liabilities Property $ 499 $ 3,388 $ 494 $ 3,177 Tax loss and credit carryforwards 2,004 — 1,920 — Postretirement benefit obligations 2,712 250 2,432 210 Other accruals and reserves 1,507 43 1,678 43 Intangibles 124 638 120 688 Inventory 30 198 28 234 Investments 142 51 125 48 Other – net 858 196 851 120 Subtotal $ 7,876 $ 4,764 $ 7,648 $ 4,520 Valuation allowances (1,302) — (1,262) — Total $ 6,574 $ 4,764 $ 6,386 $ 4,520 Operating Loss and Tax Credit Carryforwards at Dec 31 2020 2019 In millions Assets Assets Operating loss carryforwards Expire within 5 years $ 274 $ 263 Expire after 5 years or indefinite expiration 1,031 1,133 Total operating loss carryforwards $ 1,305 $ 1,396 Tax credit carryforwards Expire within 5 years $ 434 $ 32 Expire after 5 years or indefinite expiration 265 492 Total tax credit carryforwards $ 699 $ 524 Total operating loss and tax credit carryforwards $ 2,004 $ 1,920 Undistributed earnings of foreign subsidiaries and related companies that are deemed to be permanently invested amounted to $7,401 million at December 31, 2020 and $6,851 million at December 31, 2019. Undistributed earnings are subject to certain taxes upon repatriation, primarily where foreign withholding taxes apply. It is not practicable to calculate the unrecognized deferred tax liability on undistributed earnings. The following table provides a reconciliation of the Company's unrecognized tax benefits: Total Gross Unrecognized Tax Benefits In millions 2020 2019 2018 Total unrecognized tax benefits at Jan 1 $ 319 $ 314 $ 255 Decreases related to positions taken on items from prior years (1) (1) (8) Increases related to positions taken on items from prior years 52 16 68 Increases related to positions taken in the current year 18 10 2 Settlement of uncertain tax positions with tax authorities (14) (19) — Decreases due to expiration of statutes of limitations (1) — (1) Foreign exchange gain — (1) (2) Total unrecognized tax benefits at Dec 31 $ 373 $ 319 $ 314 Total unrecognized tax benefits that, if recognized, would impact the effective tax rate $ 285 $ 234 $ 235 Total amount of interest and penalties expense (benefit) recognized in "Provision for income taxes on continuing operations" $ 84 $ (11) $ (12) Total accrual for interest and penalties recognized in the consolidated balance sheets $ 144 $ 100 $ 109 Prior to the separation, TDCC and its consolidated subsidiaries were included in DowDuPont's consolidated federal income tax group and consolidated tax return. Generally, the consolidated tax liability of the DowDuPont U.S. tax group for each year was apportioned among the members of the consolidated group based on each member’s separate taxable income. TDCC and DuPont intend that, to the extent federal and/or state corporate income tax liabilities are reduced through the utilization of tax attributes of the other, settlement of any receivable and payable generated from the use of the other party’s sub-group attributes will be in accordance with a tax sharing agreement and/or tax matters agreement. At December 31, 2020, the Company had a receivable of $261 million related to the tax sharing agreement, which is included in "Other current assets" in the consolidated balance sheets ($312 million included in "Noncurrent receivables" at December 31, 2019). Each year, the Company files tax returns in the various national, state and local income taxing jurisdictions in which it operates. These tax returns are subject to examination and possible challenge by the tax authorities. Positions challenged by the tax authorities may be settled or appealed by the Company. As a result, there is an uncertainty in income taxes recognized in the Company’s financial statements in accordance with accounting for income taxes and accounting for uncertainty in income taxes. The ultimate resolution of such uncertainties is not expected to have a material impact on the Company's results of operations. Tax years that remain subject to examination for the Company’s major tax jurisdictions are shown below: Tax Years Subject to Examination by Major Tax Jurisdiction at Dec 31, 2020 Earliest Open Year Jurisdiction Argentina 2014 Brazil 2015 Canada 2012 China 2010 Germany 2014 Italy 2016 The Netherlands 2016 Switzerland 2016 United States: Federal income tax 2004 State and local income tax 2004 The reserve for non-income tax contingencies related to issues in the United States and foreign locations was $33 million at December 31, 2020 ($44 million at December 31, 2019). This is management’s best estimate of the potential liability for non-income tax contingencies. Inherent uncertainties exist in estimates of tax contingencies due to changes in tax law, both legislated and concluded through the various jurisdictions’ tax court systems. It is the opinion of the Company’s management that the possibility is remote that costs in excess of those accrued will have a material impact on the Company’s consolidated financial statements.

EARNINGS PER SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	EARNINGS PER SHARE CALCULATIONS The following tables provide earnings per share calculations of Dow Inc. for the years ended December 31, 2020, 2019, and 2018. In accordance with the accounting guidance for earnings per share, earnings per share of TDCC is not presented as this information is not required in financial statements of wholly owned subsidiaries. Net Income (Loss) for Earnings Per Share Calculations 2020 2019 2018 In millions Income (loss) from continuing operations, net of tax $ 1,294 $ (1,717) $ 2,940 Net income attributable to noncontrolling interests - continuing operations (69) (74) (102) Net income attributable to participating securities - continuing operations 1 (9) (6) — Income (loss) from continuing operations attributable to common stockholders $ 1,216 $ (1,797) $ 2,838 Income from discontinued operations, net of tax $ — $ 445 $ 1,835 Net income attributable to noncontrolling interests - discontinued operations — (13) (32) Income from discontinued operations attributable to common stockholders $ — $ 432 $ 1,803 Net income (loss) attributable to common stockholders $ 1,216 $ (1,365) $ 4,641 Earnings (Loss) Per Share Calculations - Basic 2020 2019 2018 Dollars per share Income (loss) from continuing operations attributable to common stockholders $ 1.64 $ (2.42) $ 3.80 Income from discontinued operations, net of tax — 0.58 2.41 Net income (loss) attributable to common stockholders $ 1.64 $ (1.84) $ 6.21 Earnings (Loss) Per Share Calculations - Diluted 2020 2019 2018 Dollars per share Income (loss) from continuing operations attributable to common stockholders $ 1.64 $ (2.42) $ 3.80 Income from discontinued operations, net of tax — 0.58 2.41 Net income (loss) attributable to common stockholders $ 1.64 $ (1.84) $ 6.21 Share Count Information 2020 2019 2018 Shares in millions Weighted-average common shares outstanding - basic 2 740.5 742.5 747.2 Plus dilutive effect of equity compensation plans 3 1.8 — — Weighted-average common shares outstanding - diluted 2, 3 742.3 742.5 747.2 Stock options and restricted stock units excluded from EPS calculations 4 14.2 20.8 — 1. Restricted stock units are considered participating securities due to the Company's practice of paying dividend equivalents on unvested shares. 2. Share amounts for the year ended December 31, 2018 were based on 2,246.3 million DowDuPont common shares outstanding as of the Record Date for the April 1, 2019 distribution, less 4.6 million Employee Stock Ownership Plan ("ESOP") shares that had not been released and were not considered outstanding, adjusted for the Distribution Ratio. There was no dilutive effect for the year ended December 31, 2018 as the Company did not engage in activities giving rise to dilution. 3. The year ended December 31, 2019 reflected a loss from continuing operations, and as such, the basic share count was used for purposes of calculating earnings per share on a diluted basis. 4. These outstanding options to purchase shares of common stock and restricted stock units were excluded from the calculation of diluted earnings per share because the effect of including them would have been antidilutive. For the year ended December 31, 2018, the Company did not engage in activities giving rise to dilution.

INVENTORIES

INVENTORIES	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
INVENTORIES	INVENTORIES The following table provides a breakdown of inventories: Inventories at Dec 31 In millions 2020 2019 Finished goods $ 3,140 $ 3,505 Work in process 996 1,122 Raw materials 598 628 Supplies 933 845 Total $ 5,667 $ 6,100 Adjustment of inventories to the LIFO basis 34 114 Total inventories $ 5,701 $ 6,214 Inventories valued on the LIFO basis represented 30 percent of the total inventories at December 31, 2020 and 32 percent of the total inventories at December 31, 2019.

PROPERTY

PROPERTY	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
PROPERTY	PROPERTY The following table provides a breakdown of property: Property at Dec 31 Estimated Useful 2020 2019 In millions Land and land improvements 0-25 $ 2,011 $ 2,177 Buildings 5-50 4,976 4,742 Machinery and equipment 3-25 42,108 40,651 Other property 3-50 5,626 5,354 Construction in progress 1 — 1,604 1,986 Total property $ 56,325 $ 54,910 1. The decrease is primarily related to the Company proactively reducing capital spending in 2020 to focus on cash and maintaining financial strength during the COVID-19 pandemic. In millions 2020 2019 2018 Depreciation expense $ 2,092 $ 2,156 $ 2,174 Capitalized interest $ 64 $ 80 $ 88

NONCONSOLIDATED AFFILIATES

NONCONSOLIDATED AFFILIATES	12 Months Ended
	Dec. 31, 2020
Equity Method Investments and Joint Ventures [Abstract]
NONCONSOLIDATED AFFILIATES	NONCONSOLIDATED AFFILIATES The Company’s investments in companies accounted for using the equity method (“nonconsolidated affiliates”) and dividends received from nonconsolidated affiliates are shown in the following tables: Investments in Nonconsolidated Affiliates at Dec 31 2020 1 2019 1 In millions Investment in nonconsolidated affiliates $ 1,327 $ 1,404 Other noncurrent obligations (169) (80) Net investment in nonconsolidated affiliates $ 1,158 $ 1,324 1. The carrying amount of the Company’s investments in nonconsolidated affiliates at December 31, 2020, was $55 million less than its share of the investees’ net assets, ($51 million less at December 31, 2019), exclusive of additional differences relating to Sadara, EQUATE Petrochemical Company K.S.C.C. ("EQUATE") and AgroFresh Solutions Inc. ("AFSI"), which are discussed separately in the disclosures that follow. Dividends Received from Nonconsolidated Affiliates 2020 2019 2018 In millions Dividends from nonconsolidated affiliates $ 425 $ 1,020 $ 663 Except for AFSI, the nonconsolidated affiliates in which the Company has investments are privately held companies; therefore, quoted market prices are not available. Sadara In 2011, the Company and Saudi Arabian Oil Company formed Sadara - a joint venture between the two companies that subsequently constructed and now operates a world-scale, fully integrated chemicals complex in Jubail Industrial City, Kingdom of Saudi Arabia. The Company has a 35 percent equity interest in this joint venture and has been, and continues to be, responsible for marketing the majority of Sadara’s products through the Company’s established sales channels. The Company’s investment in Sadara was $1,618 million less than Dow’s proportionate share of the carrying value of the underlying net assets held by Sadara at December 31, 2020 ($1,705 million less at December 31, 2019). This basis difference is primarily attributed to the long-lived assets of Sadara and is being amortized over the remaining useful lives of the assets. At December 31, 2020, the Company had a negative investment balance in Sadara of $22 million (zero at December 31, 2019) classified as “Other noncurrent obligations” in the Company’s consolidated balance sheets, related to the Company’s share of Sadara’s AOCL in 2020 offset by the basis difference amortization. The Company expects to continue to recognize its share of potential future losses reported by Sadara. See Note 16 for additional information related to guarantees. In 2019, the Company recorded impairment charges related to its investment in Sadara. The joint venture achieved full commercial operations of all its facilities in 2017. In December 2018, the joint venture successfully completed its Creditors Reliability Test, an extensive operational testing program designed to demonstrate the reliability of the joint venture’s full chemical complex by operating at high rates for an extended period of time. While Sadara had reached these operational milestones and had been generating positive EBITDA (a non-GAAP measure defined as earnings before interest, taxes, depreciation and amortization), the joint venture had yet to report positive net income. During the fourth quarter of 2019, Sadara tested its long-lived assets for impairment using long-term cash flow projections. Sadara’s U.S. GAAP impairment test utilized an undiscounted cash flow methodology, under which Sadara concluded its long-lived assets were recoverable. Due to Sadara's financial condition and its long-lived asset impairment test, Dow evaluated its equity method investment in Sadara for other-than-temporary impairment. The Company utilized a discounted cash flow methodology to measure the estimated fair value of its investment in Sadara, which was estimated to be zero (see Note 23 for additional information on the fair value measurement). The Company determined the decline in value of its investment in Sadara was other-than-temporary due to Sadara’s financial performance since becoming commercially operational in 2017 and uncertainty around prospects for recovery in Sadara’s financial condition. In addition, the Company reserved certain accounts and notes receivable and accrued interest balances associated with Sadara due to uncertainty around the timing of collection. In total, the Company recorded a $1,755 million pretax charge in the fourth quarter of 2019 related to Sadara, included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to Packaging & Specialty Plastics ($370 million), Industrial Intermediates & Infrastructure ($1,168 million) and Corporate ($217 million). In 2020, the Company loaned $333 million to Sadara that was accounted for as in substance common stock and classified as "Investment in nonconsolidated affiliates" in the Company's consolidated balance sheets. The Company loaned $473 million to Sadara and converted $380 million of the notes and accounts receivable into equity during 2019. In 2018, the Company converted $382 million of outstanding notes and accounts receivable with Sadara into equity, primarily due to a shareholder loan reduction agreement with Sadara. At December 31, 2020 and 2019, the Company's note receivable with Sadara was zero. EQUATE The Company had a negative investment balance in EQUATE of $147 million at December 31, 2020 (negative $80 million at December 31, 2019), classified as "Other noncurrent obligations" in the consolidated balance sheets. The Company's investment in EQUATE was $475 million less than the Company's proportionate share of EQUATE's underlying net assets at December 31, 2020 ($489 million less at December 31, 2019), which represents the difference between the fair values of certain MEGlobal assets acquired by EQUATE and the Company's related valuation on a U.S. GAAP basis. A basis difference of $155 million at December 31, 2020 ($169 million at December 31, 2019) is being amortized over the remaining useful lives of the assets and the remainder is considered a permanent difference. AFSI At December 31, 2020, the Company had an investment in AFSI of zero ($35 million at December 31, 2019), classified as "Investment in nonconsolidated affiliates" in the consolidated balance sheets. At December 31, 2020, the Company's investment in AFSI was $108 million less than the Company's proportionate share of AFSI's underlying net assets ($102 million less at December 31, 2019). This amount primarily relates to an other-than-temporary decline in the Company's investment in AFSI. At December 31, 2020, the Company held a 40 percent ownership interest in AFSI (41 percent at December 31, 2019). Transactions with Nonconsolidated Affiliates The Company has service agreements with certain nonconsolidated affiliates, including contracts to manage the operations of manufacturing sites and the construction of new facilities; licensing and technology agreements; and marketing, sales, purchase, lease and sublease agreements. The Company sells excess ethylene glycol produced at manufacturing facilities in the United States and Europe to MEGlobal, a subsidiary of EQUATE. The Company also sells ethylene to MEGlobal as a raw material for its ethylene glycol plants in Canada. Sales of these products to MEGlobal represented 1 percent of total net sales in 2020, 2019 and 2018. Sales of ethylene to MEGlobal are reflected in the Packaging & Specialty Plastics segment and represented 2 percent of the segment's sales in 2020 (1 percent in 2019 and 2018). Sales of ethylene glycol to MEGlobal are reflected in the Industrial Intermediates & Infrastructure segment and represented 1 percent of the segment's sales in 2020 (1 percent in 2019 and 2 percent in 2018). The Company is responsible for marketing the majority of Sadara products outside of the Middle East zone through the Company’s established sales channels. Under this arrangement, the Company purchases and sells Sadara products for a marketing fee. Purchases of Sadara products represented 8 percent of "Cost of sales" in 2020 (8 percent in 2019 and 9 percent in 2018). The Company purchases products from The SCG-Dow Group, primarily for marketing and distribution in Asia Pacific. Purchases of products from The SCG-Dow Group represented 3 percent of "Cost of sales" in 2020 (2 percent in 2019 and 2018). Sales to and purchases from other nonconsolidated affiliates were not material to the consolidated financial statements. Balances due to or due from nonconsolidated affiliates at December 31, 2020 and 2019 were as follows: Balances Due To or Due From Nonconsolidated Affiliates at Dec 31 2020 2019 In millions Accounts and notes receivable - Other $ 229 $ 211 Accounts payable - Other $ 1,075 $ 1,092 Principal Nonconsolidated Affiliates The Company had an ownership interest in 35 nonconsolidated affiliates at December 31, 2020 (37 at December 31, 2019). The Company's principal nonconsolidated affiliates and its ownership interest (direct and indirect) for each at December 31, 2020, 2019 and 2018 are as follows: Principal Nonconsolidated Affiliates at Dec 31 Country Ownership Interest 2020 2019 2018 EQUATE Petrochemical Company K.S.C.C. Kuwait 42.5 % 42.5 % 42.5 % The Kuwait Olefins Company K.S.C.C. Kuwait 42.5 % 42.5 % 42.5 % The Kuwait Styrene Company K.S.C.C. Kuwait 42.5 % 42.5 % 42.5 % Map Ta Phut Olefins Company Limited 1 Thailand 32.77 % 32.77 % 32.77 % Sadara Chemical Company Saudi Arabia 35 % 35 % 35 % The SCG-Dow Group: Siam Polyethylene Company Limited Thailand 50 % 50 % 50 % Siam Polystyrene Company Limited Thailand 50 % 50 % 50 % Siam Styrene Monomer Company Limited Thailand 50 % 50 % 50 % Siam Synthetic Latex Company Limited Thailand 50 % 50 % 50 % 1. The Company's effective ownership of Map Ta Phut Olefins Company Limited ("Map Ta Phut") is 32.77 percent, of which the Company directly owns 20.27 percent and indirectly owns 12.5 percent through its equity interest in Siam Polyethylene Company Limited. The Company’s investment in and equity earnings from its principal nonconsolidated affiliates are shown in the tables below: Investment in Principal Nonconsolidated Affiliates at Dec 31 2020 2019 In millions Investment in nonconsolidated affiliates $ 922 $ 963 Other noncurrent obligations (169) (80) Net investment in principal nonconsolidated affiliates $ 753 $ 883 Equity in Earnings (Losses) of Principal Nonconsolidated Affiliates 2020 2019 2018 In millions Equity in earnings (losses) of principal nonconsolidated affiliates $ (16) $ 21 $ 561 The summarized financial information that follows represents the combined accounts (at 100 percent) of the principal nonconsolidated affiliates. Summarized Balance Sheet Information at Dec 31 2020 2019 In millions Current assets $ 5,044 $ 5,302 Noncurrent assets 25,298 26,477 Total assets $ 30,342 $ 31,779 Current liabilities $ 3,942 $ 3,743 Noncurrent liabilities 20,144 20,271 Total liabilities $ 24,086 $ 24,014 Noncontrolling interests $ 132 $ 110 Summarized Income Statement Information 1 2020 2019 2018 In millions Sales $ 9,470 $ 10,905 $ 14,461 Gross profit $ 619 $ 644 $ 2,320 Income (loss) from continuing operations, net of tax $ (461) $ (277) $ 1,173 1. The results in this table reflect purchase and sale activity between certain principal nonconsolidated affiliates and the Company, as previously discussed in the "Transactions with Nonconsolidated Affiliates" section.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	GOODWILL AND OTHER INTANGIBLE ASSETS The following table shows changes in the carrying amounts of goodwill by reportable segment for the years ended December 31, 2020 and 2019: Goodwill Packaging & Specialty Plastics Industrial Intermediates & Infrastructure Performance Materials & Coatings Total In millions Balance at Jan 1, 2019 $ 5,101 $ 1,095 $ 3,650 $ 9,846 Foreign currency impact 8 6 (24) (10) Goodwill Impairment — — (1,039) (1,039) Other — (1) — (1) Balance at Dec 31, 2019 $ 5,109 $ 1,100 $ 2,587 $ 8,796 Foreign currency impact 12 4 106 122 Sale of rail infrastructure (2) — — (2) Sale of marine and terminal infrastructure (4) (4) — (8) Balance at Dec 31, 2020 $ 5,115 $ 1,100 $ 2,693 $ 8,908 The separation from DowDuPont did not impact the composition of the Company's six reporting units: Coatings & Performance Monomers, Consumer Solutions, Hydrocarbons & Energy, Industrial Solutions, Packaging and Specialty Plastics and Polyurethanes & Construction Chemicals. The ECP businesses received as part of the separation from DowDuPont are included in the Hydrocarbons & Energy and Packaging and Specialty Plastics reporting units. At December 31, 2020, goodwill was carried by all reporting units except Coatings & Performance Monomers (“C&PM”). Goodwill Impairments The carrying amounts of goodwill at December 31, 2020 and 2019 were net of accumulated impairments of $309 million in Industrial Intermediates & Infrastructure and $2,530 million in Performance Materials & Coatings. Goodwill Impairment Testing The Company performs an impairment test of goodwill annually in the fourth quarter. In 2020, the Company performed qualitative assessments for all reporting units that carried goodwill. Based on the results of the qualitative assessments, the Company performed quantitative testing for one reporting unit (two in 2019 and one in 2018). The qualitative assessments on the remaining reporting units indicated that it was not more likely than not that fair value was less than the carrying value for those reporting units. The quantitative testing conducted in 2020 and 2018 concluded that no goodwill impairments existed. Upon completion of the quantitative testing in the fourth quarter of 2019, the Company determined the C&PM reporting unit was impaired. During 2019, the C&PM reporting unit did not consistently meet expected financial performance targets, primarily due to the industry’s increased captive use of coatings products, which led to volume reductions; reduced margins for products across the portfolio due to changes in customer buying patterns and supply and demand balances; as well as a continuous trend of customer consolidation in end-markets, which reduced growth opportunities. As a result, the C&PM reporting unit lowered its future revenue and profitability projections. The fair value of the C&PM reporting unit was determined using a discounted cash flow methodology that reflected reductions in projected revenue growth rates due to lower sales volume and price assumptions, as well as reductions to future growth rates. These discounted cash flows did not support the carrying value of the C&PM reporting unit. As a result, the Company recorded a goodwill impairment charge of $1,039 million in the fourth quarter of 2019, included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to the Performance Materials & Coatings segment. The carrying value of the C&PM reporting unit's goodwill was zero at December 31, 2019. No other goodwill impairments were identified as a result of the 2019 testing. Other Intangible Assets The following table provides information regarding the Company’s other intangible assets: Other Intangible Assets at Dec 31 2020 2019 In millions Gross Accum Amort Net Gross Accum Amort Net Intangible assets with finite lives: Developed technology $ 2,638 $ (1,677) $ 961 $ 2,634 $ (1,467) $ 1,167 Software 1,489 (989) 500 1,449 (893) 556 Trademarks/tradenames 352 (343) 9 352 (342) 10 Customer-related 3,301 (1,419) 1,882 3,207 (1,184) 2,023 Total other intangible assets, finite lives $ 7,780 $ (4,428) $ 3,352 $ 7,642 $ (3,886) $ 3,756 In-process research and development — — — 3 — 3 Total other intangible assets $ 7,780 $ (4,428) $ 3,352 $ 7,645 $ (3,886) $ 3,759 The following table provides information regarding amortization expense from continuing operations related to intangible assets: Amortization Expense from Continuing Operations 2020 2019 2018 In millions Other intangible assets, excluding software $ 401 $ 419 $ 469 Software, included in "Cost of sales" $ 96 $ 96 $ 93 Total estimated amortization expense from continuing operations for the next five fiscal years, including amounts expected to be capitalized, is as follows: Estimated Amortization Expense for Next Five Years In millions 2021 $ 477 2022 $ 415 2023 $ 384 2024 $ 366 2025 $ 275

TRANSFERS OF FINANCIAL ASSETS

TRANSFERS OF FINANCIAL ASSETS	12 Months Ended
	Dec. 31, 2020
Transfers and Servicing [Abstract]
TRANSFERS OF FINANCIAL ASSETS	TRANSFERS OF FINANCIAL ASSETS Accounts Receivable Programs The Company maintains committed accounts receivable facilities with various financial institutions, including in the United States, which expires in November 2022 (“U.S. A/R Program”) and in Europe, which expires in July 2023 (“Europe A/R Program” and together with the U.S. A/R Program, "the Programs"). Under the terms of the Programs, the Company may sell certain eligible trade accounts receivable at any point in time, up to $900 million for the U.S. A/R Program and up to €400 million for the Europe A/R Program. Under the terms of the Programs, the Company continues to service the receivables from the customer, but retains no interest in the receivables, and remits payment to the financial institutions. The Company also provides a guarantee to the financial institutions for the creditworthiness and collection of the receivables in satisfaction of the facility. See Note 16 for additional information related to guarantees. There were no receivables sold under the Programs during the years ended December 31, 2020 and 2019. Accounts Receivable Securitization Facilities The Company historically sold trade accounts receivable of select North American entities and qualifying trade accounts receivable of select European entities on a revolving basis to certain multi-seller commercial paper conduit entities ("conduits"). The proceeds received were comprised of cash and interests in specified assets of the conduits (the receivables sold by the Company) that entitled the Company to the residual cash flows of such specified assets in the conduits after the commercial paper had been repaid. Neither the conduits nor the investors in those entities had recourse to other assets of the Company in the event of nonpayment by the debtors.

NOTES PAYABLE, LONG-TERM DEBT A

NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES	NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES Notes Payable at Dec 31 In millions 2020 2019 Commercial paper $ — $ 151 Notes payable to banks and other lenders 156 435 Total notes payable $ 156 $ 586 Year-end average interest rates 3.89 % 6.30 % Long-Term Debt at Dec 31 2020 Average Rate 2020 2019 2019 In millions Promissory notes and debentures: Final maturity 2020 — % $ — 8.44 % $ 76 Final maturity 2021 8.95 % 173 8.95 % 174 Final maturity 2022 8.64 % 121 3.50 % 1,372 Final maturity 2023 7.63 % 250 7.64 % 325 Final maturity 2024 1 3.43 % 1,017 3.37 % 1,397 Final maturity 2025 5.13 % 625 5.26 % 662 Final maturity 2026 and thereafter 1 5.22 % 10,888 5.73 % 8,820 Other facilities: U.S. dollar loans — % — 2.55 % 2,000 Foreign currency notes and loans, various rates and maturities 1.41 % 3,189 3.26 % 592 InterNotes®, varying maturities through 2050 3.56 % 535 3.44 % 928 Finance lease obligations 2 518 395 Unamortized debt discount and issuance costs (365) (331) Long-term debt due within one year 3 (460) (435) Long-term debt $ 16,491 $ 15,975 1. Cost includes net fair value hedge adjustment gains of $69 million at December 31, 2020 ($1 million at December 31, 2019). See Note 22 for additional information. 2. See Note 17 for additional information. 3. Presented net of current portion of unamortized debt issuance costs. Maturities of Long-Term Debt for Next Five Years at Dec 31, 2020 In millions 2021 $ 460 2022 $ 236 2023 $ 381 2024 $ 1,079 2025 $ 717 2020 Activity In February 2020, the Company issued €2.25 billion aggregate principal amount of notes (“Euro Notes”). The Euro Notes included €1 billion aggregate principal amount of 0.50 percent notes due 2027, €750 million aggregate principal amount of 1.125 percent notes due 2032 and €500 million aggregate principal amount of 1.875 percent notes due 2040. The Euro Notes have a weighted average coupon rate of approximately 1.0 percent. With the net proceeds from the issuance of the Euro Notes, Dow Silicones voluntarily repaid $750 million of principal under a certain third party credit agreement, ("Term Loan Facility”). In addition, the Company redeemed $1.25 billion of 3.0 percent notes issued by the Company with maturity in 2022. As a result, the Company recognized a pretax loss of $85 million on the early extinguishment of debt, included in “Sundry income (expense) – net” in the consolidated statements of income and related to Corporate. In the first quarter of 2020, the Company withdrew $800 million under various uncommitted bilateral credit arrangements, which were subsequently repaid in the second quarter of 2020. In August 2020, the Company issued $2 billion aggregate principal amount of notes. The notes included $850 million aggregate principal amount of 2.1 percent notes due 2030 and $1.15 billion aggregate principal amount of 3.6 percent notes due 2050 (together, the "Notes" ). With the net proceeds from the issuance of the Notes, Dow Silicones voluntarily repaid the remaining $1.25 billion outstanding principal balance under the Term Loan Facility. In September 2020, the Company also used $556 million of aggregate proceeds from the Notes to fund cash tender offers for certain of its debt securities and certain debt securities of Union Carbide. In total, $493 million aggregate principal amount was tendered and retired. These actions resulted in a pretax loss of $62 million on the early extinguishment of debt included in "Sundry income (expense) – net" in the consolidated statements of income and related to Corporate. In 2020, the Company also issued an aggregate principal amount of $190 million of InterNotes®, and redeemed an aggregate principal amount of $180 million at maturity. In addition, the Company voluntarily repaid an aggregate principal amount of $400 million of InterNotes® with various maturities. As a result, the Company recognized a pretax loss on the early extinguishment of debt of $2 million, included in “Sundry income (expense) – net” in the consolidated statements of income and related to Corporate. Additionally, the Company repaid $134 million of long-term debt at maturity and approximately $29 million of long-term debt was repaid by consolidated variable interest entities. Subsequent Event On January 15, 2021, the Company announced a call for $118 million of InterNotes® with various maturities, which will settle on February 15, 2021. 2019 Activity In 2019, the Company issued $2 billion of senior unsecured notes in an offering under Rule 144A of the Securities Act of 1933. The offering included $750 million aggregate principal amount of 4.80 percent notes due 2049; $750 million aggregate principal amount of 3.625 percent notes due 2026; and $500 million aggregate principal amount of 3.15 percent notes due 2024. In addition, the Company redeemed $1.5 billion of 4.25 percent notes with maturity in 2020 and $1.25 billion of 4.125 percent notes with maturity in 2021. As a result, the Company recognized a pretax loss of $100 million on the early extinguishment of debt, included in "Sundry income (expense) - net" in the consolidated statements of income and related to Corporate. The Company also issued an aggregate principal amount of $277 million of InterNotes®, and redeemed an aggregate principal amount of $122 million at maturity. Approximately $149 million of long-term debt (net of $16 million of issuances) was repaid by consolidated variable interest entities. In 2019, Dow Silicones voluntarily repaid $2.5 billion of principal under the Term Loan Facility. As a result, Dow Silicones recognized a pretax loss of $2 million on the early extinguishment of debt, included in "Sundry income (expense) - net" in the consolidated statements of income and related to Corporate. In October 2019, TDCC launched exchange offers for $4 billion of all the outstanding, unregistered senior notes that were issued in private offerings on November 30, 2018 and May 20, 2019, for identical, registered notes under the Securities Act of 1933 (the “Exchange Offers”). The Exchange Offers were with respect to the Company’s 3.15 percent notes due 2024, 4.55 percent notes due 2025, 3.625 percent notes due 2026, 4.80 percent notes due 2028, 5.55 percent notes due 2048 and 4.80 percent notes due 2049, and fulfilled the Company’s obligations contained in the registration rights agreements entered into in connection with the issuance of the aforementioned notes. 2018 Activity In 2018, the Company redeemed $333 million of 5.70 percent notes at maturity and an aggregate principal amount of $91 million of InterNotes® at maturity. In addition, approximately $138 million of long-term debt was repaid by consolidated variable interest entities. The Company also called an aggregate principal amount of $343 million tax-exempt bonds of various interest rates and maturities in 2029, 2033 and 2038. As a result of these redemptions, the Company recognized a pretax loss of $6 million on the early extinguishment of debt, included in “Sundry income (expense) - net” in the consolidated statements of income and related to Corporate. In November 2018, the Company issued $2 billion of senior unsecured notes in an offering under Rule 144A of the Securities Act of 1933. The offering included $900 million aggregate principal amount of 5.55 percent notes due 2048; $600 million aggregate principal amount of 4.80 percent notes due 2028; and $500 million aggregate principal amount of 4.55 percent notes due 2025. In December 2018, the Company tendered and redeemed $2.1 billion of 8.55 percent notes issued by the Company with maturity in 2019. As a result, the Company recognized a pretax loss of $48 million on the early extinguishment of debt, included in "Sundry income (expense) - net" in the consolidated statements of income and related to Corporate. Available Credit Facilities The following table summarizes the Company's credit facilities: Committed and Available Credit Facilities at Dec 31, 2020 In millions Committed Credit Credit Available Maturity Date Interest Five Year Competitive Advance and Revolving Credit Facility $ 5,000 $ 5,000 October 2024 Floating rate Bilateral Revolving Credit Facility 200 200 November 2021 Floating rate Bilateral Revolving Credit Facility 300 300 December 2021 Floating rate Bilateral Revolving Credit Facility 300 300 December 2021 Floating rate Bilateral Revolving Credit Facility 150 150 March 2022 Floating rate Bilateral Revolving Credit Facility 100 100 June 2022 Floating rate Bilateral Revolving Credit Facility 200 200 September 2022 Floating rate Bilateral Revolving Credit Facility 200 200 September 2023 Floating rate Bilateral Revolving Credit Facility 250 250 September 2023 Floating rate Bilateral Revolving Credit Facility 300 300 September 2023 Floating rate Bilateral Revolving Credit Facility 100 100 October 2024 Floating rate Bilateral Revolving Credit Facility 100 100 October 2024 Floating rate Bilateral Revolving Credit Facility 200 200 November 2024 Floating rate Bilateral Revolving Credit Facility 100 100 March 2025 Floating rate Bilateral Revolving Credit Facility 250 250 March 2025 Floating rate Bilateral Revolving Credit Facility 350 350 March 2025 Floating rate Total Committed and Available Credit Facilities $ 8,100 $ 8,100 Secured Borrowings In September 2018, the Company renewed its North American accounts receivable securitization facility for a one year term and amended the terms of the agreement from an off-balance sheet arrangement to a secured borrowing arrangement, with a borrowing capacity up to $800 million. Under the structure of the amended agreement, the Company had the option to use select trade accounts receivable to collateralize the credit facility with certain lenders. In November 2019, the facility was amended and is no longer a secured borrowing arrangement. It was not drawn upon during its term as a secured borrowing arrangement. In October 2018, the Company renewed its European accounts receivable securitization facility for a two year term and amended the terms of the agreement from an off-balance sheet arrangement to a secured borrowing arrangement, with a borrowing capacity up to €400 million. Under the structure of the amended agreement, the Company had the option to use select trade accounts receivable to collateralize the credit facility with certain lenders. In July 2020, the facility was amended and is no longer a secured borrowing arrangement. It was not drawn upon during its term as a secured borrowing arrangement. See Note 14 for additional information related to the accounts receivable programs. Letters of Credit The Company utilizes letters of credit to support commitments made in the ordinary course of business. While the terms and amounts of letters of credit change, the Company generally has approximately $400 million of outstanding letters of credit at any given time. In addition, at December 31, 2020, the Company had a $220 million outstanding letter of credit related to a guarantee of the Company’s share of one future debt service schedule payment for Sadara. See Note 16 for additional information related to guarantees. Debt Covenants and Default Provisions TDCC’s outstanding long-term debt has been issued primarily under indentures which contain, among other provisions, certain customary restrictive covenants with which TDCC must comply while the underlying notes are outstanding. Failure of TDCC to comply with any of its covenants, could result in a default under the applicable indenture and allow the note holders to accelerate the due date of the outstanding principal and accrued interest on the underlying notes. TDCC's indenture covenants include obligations to not allow liens on principal U.S. manufacturing facilities, enter into sale and lease-back transactions with respect to principal U.S. manufacturing facilities, merge or consolidate with any other corporation, or sell, lease or convey, directly or indirectly, all or substantially all of TDCC’s assets. The outstanding debt also contains customary default provisions. TDCC remains in compliance with these covenants. TDCC’s primary, private credit agreements also contain certain customary restrictive covenant and default provisions in addition to the covenants set forth above with respect to TDCC’s debt. Significant other restrictive covenants and default provisions related to these agreements include: (a) the obligation to maintain the ratio of TDCC’s consolidated indebtedness to consolidated capitalization at no greater than 0.65 to 1.00 at any time the aggregate outstanding amount of loans under the Five Year Competitive Advance and Revolving Credit Facility Agreement ("Revolving Credit Agreement") dated October 30, 2018, equals or exceeds $500 million, (b) a default if TDCC or an applicable subsidiary fails to make any payment, including principal, premium or interest, under the applicable agreement on other indebtedness of, or guaranteed by, TDCC or such applicable subsidiary in an aggregate amount of $100 million or more when due, or any other default or other event under the applicable agreement with respect to such indebtedness occurs which permits or results in the acceleration of $400 million or more in the aggregate of principal, and (c) a default if TDCC or any applicable subsidiary fails to discharge or stay within 60 days after the entry of a final judgment against TDCC or such applicable subsidiary of more than $400 million. Failure of TDCC to comply with any of the covenants or default provisions could result in a default under the applicable credit agreement which would allow the lenders to not fund future loan requests and to accelerate the due date of the outstanding principal and accrued interest on any outstanding indebtedness. On April 1, 2019, DowDuPont completed the separation of its materials science business and Dow Inc. became the direct parent company of TDCC. In conjunction with the separation, Dow Inc. is obligated, substantially concurrently with the issuance of any guarantee in respect of outstanding or committed indebtedness under TDCC's Revolving Credit Agreement, to enter into a supplemental indenture with TDCC and the trustee under TDCC’s existing 2008 base indenture governing certain notes issued by TDCC. Under such supplemental indenture, Dow Inc. will guarantee all outstanding debt securities and all amounts due under such existing base indenture and will become subject to certain covenants and events of default under the existing base indenture. In addition, the Revolving Credit Agreement includes an event of default which would be triggered in the event Dow Inc. incurs or guarantees third party indebtedness for borrowed money in excess of $250 million or engages in any material activity or directly owns any material assets, in each case, subject to certain conditions and exceptions. Dow Inc. may, at its option, cure the event of default by delivering an unconditional and irrevocable guarantee to the administrative agent within thirty days of the event or events giving rise to such event of default. No such events have occurred or have been triggered at the time of the filing of this Annual Report on Form 10-K.

COMMITMENTS AND CONTINGENT LIAB

COMMITMENTS AND CONTINGENT LIABILITIES	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENT LIABILITIES	COMMITMENTS AND CONTINGENT LIABILITIES Environmental Matters Introduction Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on current law and existing technologies. At December 31, 2020, the Company had accrued obligations of $1,244 million for probable environmental remediation and restoration costs, including $248 million for the remediation of Superfund sites. These obligations are included in "Accrued and other current liabilities" and "Other noncurrent obligations" in the consolidated balance sheets. This is management’s best estimate of the costs for remediation and restoration with respect to environmental matters for which the Company has accrued liabilities, although it is reasonably possible that the ultimate cost with respect to these particular matters could range up to approximately one and a half times that amount. Consequently, it is reasonably possible that environmental remediation and restoration costs in excess of amounts accrued could have a material impact on the Company’s results of operations, financial condition and cash flows. It is the opinion of the Company’s management, however, that the possibility is remote that costs in excess of the range disclosed will have a material impact on the Company’s results of operations, financial condition or cash flows. Inherent uncertainties exist in these estimates primarily due to unknown conditions, changing governmental regulations and legal standards regarding liability, and emerging remediation technologies for handling site remediation and restoration. As new or additional information becomes available and/or certain spending trends become known, management will evaluate such information in determination of the current estimate of the environmental liability. At December 31, 2019, the Company had accrued obligations of $1,155 million for probable environmental remediation and restoration costs, including $207 million for the remediation of Superfund sites. As part of the Company's 2020 Restructuring Program, in the third quarter of 2020, the Company recorded a pretax charge related to environmental remediation matters. This charge resulted from the Company's evaluation of the costs required to manage remediation activities at sites Dow will permanently shut down as part of its 2020 Restructuring Program. In addition, the Company recorded indemnification assets of $50 million related to Dow Silicones' environmental matters. The Company recognized a pretax charge, net of indemnifications, of $56 million, included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Performance Materials & Coatings ($52 million) and Corporate ($4 million). See Note 6 for additional information. In the third quarter of 2019, the Company recorded a pretax charge related to environmental remediation matters at a number of current and historical locations. The charge primarily resulted from: the culmination of long-standing negotiations and discussions with regulators and agencies, including technical studies supporting higher cost estimates for final or staged remediation plans; the Company’s evaluation of the cost required to manage remediation activities at sites affected by Dow’s separation from DowDuPont and related agreements with Corteva and DuPont; and, the Company’s review of its closure strategies and obligations to monitor ongoing operations and maintenance activities. In addition, the Company recorded indemnification assets of $48 million related to Dow Silicones’ environmental matters. The Company recognized a pretax charge, net of indemnifications, of $399 million related to these environmental matters, included in “Cost of sales” in the consolidated statements of income and related to Packaging & Specialty Plastics ($5 million), Industrial Intermediates & Infrastructure ($8 million), Performance Materials & Coatings ($50 million) and Corporate ($336 million). The following table summarizes the activity in the Company's accrued obligations for environmental matters for the years ended December 31, 2020 and 2019: Accrued Obligations for Environmental Matters 2020 2019 In millions Balance at Jan 1 $ 1,155 $ 810 Accrual adjustment 285 590 Payments against reserve (198) (241) Foreign currency impact 2 (4) Balance at Dec 31 $ 1,244 $ 1,155 The amounts charged to income on a pretax basis related to environmental remediation totaled $234 million in 2020, $588 million in 2019 and $176 million in 2018. Capital expenditures for environmental protection were $80 million in 2020, $83 million in 2019 and $55 million in 2018. Midland Off-Site Environmental Matters On June 12, 2003, the Michigan Department of Environmental Quality ("MDEQ") issued a Hazardous Waste Operating License (the "License") to the Company’s Midland, Michigan, manufacturing site (the “Midland Site”), which was renewed and replaced by the MDEQ on September 25, 2015, and included provisions requiring the Company to conduct an investigation to determine the nature and extent of off-site contamination in the City of Midland soils, the Tittabawassee River and Saginaw River sediment and floodplain soils, and the Saginaw Bay, and, if necessary, undertake remedial action. In 2016, final regulatory approval was received from the MDEQ for the City of Midland and the Company is continuing the long term monitoring requirements of the Remedial Action Plan. Tittabawassee and Saginaw Rivers, Saginaw Bay The Company, the U.S. Environmental Protection Agency (“EPA”) and the State of Michigan ("State") entered into an administrative order on consent (“AOC”), effective January 21, 2010, that requires the Company to conduct a remedial investigation, a feasibility study and a remedial design for the Tittabawassee River, the Saginaw River and the Saginaw Bay, and pay the oversight costs of the EPA and the State under the authority of the Comprehensive Environmental Response, Compensation, and Liability Act. These actions, to be conducted under the lead oversight of the EPA, will build upon the investigative work completed under the State Resource Conservation Recovery Act program from 2005 through 2009. The Tittabawassee River, beginning at the Midland Site and extending down to the first six miles of the Saginaw River, are designated as the first Operable Unit for purposes of conducting the remedial investigation, feasibility study and remedial design work. This work will be performed in a largely upriver to downriver sequence for eight geographic segments of the Tittabawassee and upper Saginaw Rivers. In the first quarter of 2012, the EPA requested the Company address the Tittabawassee River floodplain ("Floodplain") as an additional segment. In January 2015, the Company and the EPA entered into an order to address remediation of the Floodplain. The remedial work is expected to continue over the next two years. The remainder of the Saginaw River and the Saginaw Bay are designated as a second Operable Unit and the work associated with that unit may also be geographically segmented. The AOC does not obligate the Company to perform removal or remedial action; that action can only be required by a separate order. The Company and the EPA have been negotiating orders separate from the AOC that obligate the Company to perform remedial actions under the scope of work of the AOC. The Company and the EPA have entered into six separate orders to perform limited remedial actions in seven of the eight geographic segments in the first Operable Unit, including the Floodplain. Dow has received from the EPA a Notice of Completion of Work for three of these six orders and the Company continues the long-term monitoring requirements. Dow also has entered into a separate order to perform a limited remedial action for certain properties located within the second Operable Unit. Alternative Dispute Resolution Process The Company, the EPA, the U.S. Department of Justice and the natural resource damage trustees (which include the Michigan Office of the Attorney General, the Michigan Department of Environment, Great Lakes and Energy, the Michigan Department of Natural Resources, the U.S. Fish and Wildlife Service, the U.S. Bureau of Indian Affairs and the Saginaw-Chippewa Indian Tribe of Michigan) have been engaged in negotiations to seek to resolve potential governmental claims against the Company for natural resource damages related to historical off-site contamination associated with the City of Midland, the Tittabawassee and Saginaw Rivers and the Saginaw Bay. The Company and the governmental parties started meeting in the fall of 2005 and entered into a Confidentiality Agreement in December 2005. On July 20, 2020, the U.S. District Court for the Eastern District of Michigan ("District Court") entered a final consent decree in Civil Action No. 1:19-cv-13292 between the Company and federal, state and tribal trustees to resolve allegations of natural resource damages arising from the historic operations of the Company’s Midland Site. The consent decree required the Company to pay a $15 million cash settlement to be used for long-term maintenance and trustee-selected remediation projects with an additional $7 million to specified local projects managed by third parties. These funds were paid in December 2020. The consent decree further requires the Company to complete 13 additional environmental restoration projects which are valued by the trustees at approximately $77 million, to be conducted over the next several years. At December 31, 2020, the accrual for these off-site matters was $107 million (included in the total accrued obligation of $1,244 million). At December 31, 2019, the Company had an accrual for these off-site matters of $135 million (included in the total accrued obligation of $1,155 million). Environmental Matters Summary It is the opinion of the Company’s management that the possibility is remote that costs in excess of those disclosed will have a material impact on the Company’s results of operations, financial condition or cash flows. Litigation Asbestos-Related Matters of Union Carbide Corporation Introduction Union Carbide is and has been involved in a large number of asbestos-related suits filed primarily in state courts during the past four decades. These suits principally allege personal injury resulting from exposure to asbestos-containing products and frequently seek both actual and punitive damages. The alleged claims primarily relate to products that Union Carbide sold in the past, alleged exposure to asbestos-containing products located on Union Carbide’s premises and Union Carbide’s responsibility for asbestos suits filed against a former Union Carbide subsidiary, Amchem Products, Inc. ("Amchem"). In many cases, plaintiffs are unable to demonstrate that they have suffered any compensable loss as a result of such exposure, or that injuries incurred in fact resulted from exposure to Union Carbide’s products. Union Carbide expects more asbestos-related suits to be filed against Union Carbide and Amchem in the future, and will aggressively defend or reasonably resolve, as appropriate, both pending and future claims. Estimating the Asbestos-Related Liability Based on a study completed by Ankura Consulting Group, LLC ("Ankura") in January 2003, Union Carbide increased its December 31, 2002, asbestos-related liability for pending and future claims for a 15-year period ending in 2017 to $2.2 billion, excluding future defense and processing costs. In subsequent years, Union Carbide compared current asbestos claim and resolution activity to the results of the most recent Ankura study at each balance sheet date to determine whether the accrual continued to be appropriate. In 2016, Ankura completed a study to provide estimates for the undiscounted cost of disposing of pending and future claims against Union Carbide and Amchem through the terminal year of 2049, including a reasonable forecast of future defense and processing costs. Based on the study and Union Carbide’s internal review of asbestos claim and resolution activity, Union Carbide determined estimating the liability through the terminal year of 2049 was more appropriate due to increased knowledge and data about the costs to resolve claims and diminished volatility in filing rates. Union Carbide and the Company also determined that estimating and accruing a liability for future asbestos-related defense and processing costs was more appropriate as such costs represent expenditures related to legacy activities that do not contribute to current or future revenue generating activities of Union Carbide and the Company and is also reflective of the manner in which Union Carbide manages its asbestos-related exposure, including careful monitoring of the correlation between defense spending and resolution costs. As a result, in the fourth quarter of 2016, Union Carbide recorded a $1,113 million increase in its asbestos-related liability for pending and future claims, including future defense and processing costs. Each October, Union Carbide requests Ankura to review its historical asbestos claim and resolution activity through the third quarter of the current year, including asbestos-related defense and processing costs, to determine the appropriateness of updating the most recent study. In December 2018, Ankura completed a study of Union Carbide's historical asbestos claim and resolution activity through September 30, 2018, including asbestos-related defense and processing costs, and provided estimates for the undiscounted cost of disposing of pending and future claims against Union Carbide and Amchem through the terminal year of 2049. Based on the study and Union Carbide's internal review process, it was determined that no adjustment to the accrual was required. In December 2019, Ankura stated that an update of its December 2018 study would not provide a more likely estimate of future events than the estimate reflected in the study and, therefore, the estimate in the study remained applicable. Based on Union Carbide's internal review process and Ankura's response, Union Carbide determined that no change to the accrual was required. At December 31, 2019, the asbestos-related liability for pending and future claims against Union Carbide and Amchem, including future asbestos-related defense and processing costs, was $1,165 million, and approximately 18 percent of the recorded liability related to pending claims and approximately 82 percent related to future claims. In December 2020, Ankura completed a study of Union Carbide's historical asbestos claim and resolution activity through September 30, 2020, including asbestos-related defense and processing costs, and provided estimates for the undiscounted cost of disposing of pending and future claims against Union Carbide and Amchem through the terminal year of 2049. Based on the study and Union Carbide's internal review process, it was determined that no adjustment to the accrual was required. At December 31, 2020, the asbestos-related liability for pending and future claims against Union Carbide and Amchem, including future asbestos-related defense and processing costs, was $1,098 million, and approximately 22 percent of the recorded liability related to pending claims and approximately 78 percent related to future claims. Summary The Company's management believes the amounts recorded by Union Carbide for the asbestos-related liability, including defense and processing costs, reflect reasonable and probable estimates of the liability based upon current, known facts. However, future events, such as the number of new claims to be filed and/or received each year, the average cost of defending and disposing of each such claim, as well as the numerous uncertainties surrounding asbestos litigation in the United States over a significant period of time, could cause the actual costs for Union Carbide to be higher or lower than those projected or those recorded. Any such events could result in an increase or decrease in the recorded liability. Because of the uncertainties described above, Union Carbide cannot estimate the full range of the cost of resolving pending and future asbestos-related claims facing Union Carbide and Amchem. As a result, it is reasonably possible that an additional cost of disposing of Union Carbide's asbestos-related claims, including future defense and processing costs, could have a material impact on the Company's results of operations and cash flows for a particular period and on the consolidated financial position. Dow Silicones Chapter 11 Related Matters Introduction In 1995, Dow Silicones, then a 50:50 joint venture between the Company and Corning Incorporated ("Corning"), voluntarily filed for protection under Chapter 11 of the U.S. Bankruptcy Code in order to resolve Dow Silicones’ breast implant liabilities and related matters (the “Chapter 11 Proceeding”). Dow Silicones emerged from the Chapter 11 Proceeding on June 1, 2004 (the “Effective Date”) and is implementing the Joint Plan of Reorganization (the “Plan”). The Plan provides funding for the resolution of breast implant and other product liability litigation covered by the Chapter 11 Proceeding. As of June 1, 2016, Dow Silicones is a wholly owned subsidiary of the Company. Breast Implant and Other Product Liability Claims Under the Plan, a product liability settlement program administered by an independent claims office (the “Settlement Facility”) was created to resolve breast implant and other product liability claims. Product liability claimants rejecting the settlement program in favor of pursuing litigation must bring suit against a litigation facility (the “Litigation Facility”). Under the Plan, total payments committed by Dow Silicones to resolving product liability claims are capped at a maximum $2,350 million net present value (“NPV”) determined as of the Effective Date using a discount rate of seven percent (approximately $4,081 million undiscounted at December 31, 2020). Of this amount, no more than $400 million NPV determined as of the Effective Date can be used to fund the Litigation Facility. Dow Silicones had an obligation to fund the Settlement Facility and the Litigation Facility over a 16-year period, commencing at the Effective Date. At December 31, 2020, Dow Silicones and its insurers have made life-to-date payments of $1,762 million to the Settlement Facility and the Settlement Facility reported an unexpended balance of $58 million. In accordance with ASC Topic 450 "Accounting for Contingencies," the Company records a liability for breast implant and other product liability claims (“Implant Liability”), which reflects the estimated impact of the settlement of pending claims. The claim filing deadline passed in June 2019. All claims have been received and are being processed. Based on the claims filed at and before the deadline, Dow Silicones estimates that it will be obligated to contribute an additional $160 million after the Settlement Facility balance is exhausted. In the third quarter of 2019, with the assistance of a third party consultant ("Consultant"), Dow Silicones updated its Implant Liability estimate, primarily reflecting a decrease in Class 16 claims, a decrease resulting from the passage of time, decreased claim filing activity and administrative costs compared with the previous estimate, and an increase in investment income resulting from insurance proceeds. Based on the Consultant's updated estimate and Dow Silicones own review of claim filing activity, Dow Silicones determined that an adjustment to the Implant Liability was required. Accordingly, in the third quarter of 2019, Dow Silicones decreased its Implant Liability $98 million and decreased its corresponding Class 16 receivable $13 million, both included in “Sundry income (expense) - net” in the consolidated statements of income and related to Corporate. The estimate was updated again in the second quarter of 2020 with the assistance of the Consultant, which primarily reflected decreased administrative costs compared with the previous estimate and an increase in investment income resulting from insurance proceeds. Dow Silicones' Implant Liability was $160 million at December 31, 2020 ($165 million at December 31, 2019), of which $46 million ($20 million at December 31, 2019) was included in “Accrued and other current liabilities” and $114 million ($145 million at December 31, 2019) was included in "Other noncurrent obligations" in the consolidated balance sheets. Dow Silicones is not aware of circumstances that would change the factors used in estimating the Implant Liability and believes the recorded liability reflects the best estimate of the remaining funding obligations under the Plan; however, the estimate relies upon a number of significant assumptions, including: future acceptance rates, disease mix, and payment values will be materially consistent with historical experience; no material negative outcomes in future controversies or disputes over Plan interpretation will occur; and the Plan will not be modified. If actual outcomes related to any of these assumptions prove to be materially different, the future liability to fund the Plan may be materially different than the amount estimated. Commercial Creditor Issues The Plan provides that each of Dow Silicones commercial creditors (the “Commercial Creditors”) would receive in cash the sum of (a) an amount equal to the principal amount of their claims and (b) interest on such claims. Upon the Plan becoming effective, Dow Silicones paid approximately $1,500 million to the Commercial Creditors, representing principal and an amount of interest that Dow Silicones considers undisputed. On August 19, 2019, Dow Silicones entered into a settlement agreement with the Commercial Creditors related to the remaining, disputed portion, obligating Dow Silicones to pay $172 million, inclusive of the Commercial Creditors' legal costs. The settlement was approved by the District Court. As a result of the settlement agreement, in the third quarter of 2019, the Company recorded a pretax charge of $50 million, net of indemnifications of $37 million, included in "Sundry Income (expense) - net" in the consolidated statements of income and related to Corporate. The settlement was paid to the Commercial Creditors in the fourth quarter of 2019. The litigation is now concluded. Summary The amounts recorded by Dow Silicones for the Chapter 11 related matters described above were based upon current, known facts, which management believes reflect reasonable and probable estimates of the liability. However, future events could cause the actual costs for Dow Silicones to be higher or lower than those projected or those recorded. Any such events could result in an increase or decrease in the recorded liability. Other Litigation Matters In addition to the specific matters described above, the Company is party to a number of other claims and lawsuits arising out of the normal course of business with respect to product liability, patent infringement, employment matters, governmental tax and regulation disputes, contract and commercial litigation, and other actions. Certain of these actions purport to be class actions and seek damages in very large amounts. All such claims are being contested. The Company has an active risk management program consisting of numerous insurance policies secured from many carriers at various times. These policies may provide coverage that could be utilized to minimize the financial impact, if any, of certain contingencies described above. It is the opinion of the Company’s management that the possibility is remote that the aggregate of all such other claims and lawsuits will have a material adverse impact on the results of operations, financial condition and cash flows of the Company. Indemnifications with Corning In connection with the June 1, 2016 ownership restructure of Dow Silicones, the Company is indemnified by Corning for at least 50 percent of future losses associated with certain pre-closing liabilities, including the Implant Liability, Commercial Creditors issues and certain environmental matters described in the preceding sections, subject to certain conditions and limits. The maximum amount of indemnified losses which may be recovered are subject to a cap that declines over time. Indemnified losses are capped at $1 billion between May 31, 2018 and May 31, 2023, and no recoveries are permitted after May 31, 2023. The Company had indemnification assets of $115 million at December 31, 2020 ($100 million at December 31, 2019), of which zero ($37 million at December 31, 2019) was included in "Other current assets" and $115 million ($63 million at December 31, 2019) was included in "Noncurrent receivables" in the consolidated balance sheets. Gain Contingency - Dow v. Nova Chemicals Corporation Patent Infringement Matter In December 2010, Dow filed suit in the Federal Court in Ontario, Canada ("Federal Court") alleging that Nova Chemicals Corporation ("Nova") was infringing the Company's Canadian polyethylene patent 2,106,705 (the "'705 Patent"). Nova counterclaimed on the grounds of invalidity and non-infringement. In accordance with Canadian practice, the suit was bifurcated into a merits phase, followed by a damages phase. Following trial in the merits phase, in May 2014 the Federal Court ruled that the Company's '705 Patent was valid and infringed by Nova. Nova appealed to the Canadian Federal Court of Appeal, which affirmed the Federal Court decision in August 2016. Nova then sought leave to appeal its loss to the Supreme Court of Canada ("Court"), which dismissed Nova’s petition in April 2017. As a result, Nova has exhausted all appeal rights on the merits, and it is undisputed that Nova owes the Company the profits it earned from its infringing sales as determined in the trial for the damages phase. In April 2017, the Federal Court issued a Public Judgment in the damages phase, which detailed its conclusions on how to calculate the profits to be awarded to the Company. In June 2017, the Federal Court ordered Nova to pay $645 million Canadian dollars (equivalent to $495 million U.S. dollars) to the Company, plus pre- and post-judgment interest, for which the Company received payment of $501 million from Nova in July 2017. Although Nova is appealing portions of the damages judgment, certain portions of it are indisputable and can be retained by the Company regardless of the outcome of any further appeals by Nova. As a result of these actions and in accordance with ASC Topic 450-30 "Gain Contingencies," the Company recorded a $160 million pretax gain in the second quarter of 2017. On September 15, 2020, the Canadian Federal Court of Appeal dismissed Nova's appeal of the damages judgment, thus affirming the trial court's decision in its entirety. In November 2020, Nova filed an application for leave to appeal this decision to the Court. Briefing is expected to be completed in early 2021 and the Company anticipates a decision in the first half of 2021 as to whether the Court will accept the appeal. The Court has complete discretion on whether to grant leave applications. At December 31, 2020, the Company had $341 million (zero at December 31, 2019) included in "Accrued and other current liabilities" and zero ($341 million at December 31, 2019) included in "Other noncurrent obligations" related to the disputed portion of the damages judgment. The Company is confident of its chances to continue to defend the entire judgment if the Court agrees to review it, particularly the trial and appellate courts' determinations on important factual issues, which will be accorded deferential review on appeal. Gain Contingency - Dow v. Nova Chemicals Corporation Ethylene Asset Matter On September 18, 2019, the Court of the Queen’s Bench in Alberta, Canada, signed a judgment ordering Nova to pay the Company $1.43 billion Canadian dollars (equivalent to approximately $1.08 billion U.S. dollars) by October 11, 2019, for damages the Company incurred through 2012 related to the companies’ jointly-owned ethylene asset in Joffre, Alberta, Canada. The Court of the Queen's Bench in Alberta, Canada, which initially ruled in June 2018, found that Nova failed to operate the ethylene asset at full capacity for more than ten years, and furthermore, that Nova violated several contractual agreements related to the Company receiving its share of the asset’s ethylene production. These actions resulted in reduced productivity and sales for the Company. Nova has appealed the judgment, however, certain portions of it are not in dispute and are owed to the Company regardless of the outcome of Nova's appeal. As a result of these actions and in accordance with ASC Topic 450-30 “Gain Contingencies,” the Company recorded a $186 million pretax gain in the third quarter of 2019, of which $170 million was included in "Sundry income (expense) - net" and $16 million was included in "Selling, general and administrative expenses" in the consolidated statements of income and related to Packaging & Specialty Plastics. In October 2019, Nova paid $1.08 billion Canadian dollars (equivalent to approximately $0.8 billion U.S. dollars) directly to the Company, and remitted $347 million Canadian dollars to the Canada Revenue Agency ("CRA") for the tax account of one of the Company's subsidiaries. The Company sought a refund of the entire amount remitted to CRA. On March 31, 2020, the Company received the full refund from CRA, equivalent to $259 million U.S. dollars. In preparation for the June 2020 appellate hearing on the case, Nova provided the Court of the Queen's Bench in Alberta, Canada, an updated schedule of the financial impact of the issues on appeal, which explained that even if Nova prevails on all appeal issues, the Company would still be entitled to retain an amount in excess of the gain recognized in 2019. As a result, the Company recorded an $18 million pretax gain in the second quarter of 2020, of which $12 million was included in "Selling, general and administrative expenses" and $6 million was include d in "Sundry income (expense) - net" in the consolidated statements of income and related to Packaging & Specialty Plastics. On September 16, 2020, the Court of Appeal of Alberta issued its decision, affirming the trial court's liability finding, upholding the majority of Dow's damages and requiring the trial court to recalculate a portion of damages. In the fourth quarter of 2020, Nova chose not to petition the Court to review the appellate court decision, making additional portions of the ruling in Dow’s favor final and no longer subject to dispute. As a result, the Company recorded a $552 million pretax gain in the fourth quarter of 2020, of which $538 million was included in "Sundry income (expense) - net" and $14 million was included in "Selling, general and administrative expenses" in the consolidated statements of income and related to Packaging & Specialty Plastics. At December 31, 2020, $323 million ($893 million at December 31, 2019) was included in "Other noncurrent obligations" in the Company's consolidated balance sheets related to the disputed portion of the damages judgment. Dow continues to seek an award of additional damages for the period from 2013 through 2018. Purchase Commitments The Company has outstanding purchase commitments and various commitments for take-or-pay or throughput agreements. The Company was not aware of any purchase commitments that were negotiated as part of a financing arrangement for the facilities that will provide the contracted goods or services or for the costs related to those goods or services at December 31, 2020 and 2019. Guarantees The following table provides a summary of the final expiration, maximum future payments and recorded liability reflected in the consolidated balance sheets for guarantees: Guarantees Dec 31, 2020 Dec 31, 2019 In millions Final Maximum Future Payments Recorded Liability Final Maximum Future Payments Recorded Liability Guarantees 2023 $ 251 $ 2 2023 $ 3,952 $ 10 Guarantees arise during the ordinary course of business from relationships with customers, committed accounts receivable facilities and nonconsolidated affiliates when the Company undertakes an obligation to guarantee the performance of others (via delivery of cash or other assets) if specified triggering events occur. With guarantees, such as commercial or financial contracts, non-performance by the guaranteed party triggers the

LEASES

LEASES	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases of Lessee Disclosure [Text Block]	LEASES Operating lease ROU assets are included in "Operating lease right-of-use assets" while finance lease ROU assets are included in "Net property" in the consolidated balance sheets. With respect to lease liabilities, operating lease liabilities are included in "Operating lease liabilities - current" and "Operating lease liabilities - noncurrent," and finance lease liabilities are included in "Long-term debt due within one year" and "Long-Term Debt" in the consolidated balance sheets. Dow routinely leases sales and administrative offices, power plants, production facilities, warehouses and tanks for product storage, aircraft, motor vehicles, railcars, computers, office machines and equipment. Some leases contain renewal provisions, purchase options and escalation clauses and the terms for these leased assets vary depending on the lease agreement. These leased assets have remaining lease terms of up to 55 years. See Note 1 for additional information on leases. The components of lease cost for operating and finance leases for the years ended December 31, 2020 and 2019 were as follows: Lease Cost 2020 2019 In millions Operating lease cost $ 484 $ 532 Finance lease cost Amortization of right-of-use assets - finance $ 58 $ 39 Interest on lease liabilities - finance 25 25 Total finance lease cost $ 83 $ 64 Short-term lease cost $ 213 $ 204 Variable lease cost 199 198 Sublease income (5) (4) Total lease cost $ 974 $ 994 The following table provides supplemental cash flow information related to leases: Other Lease Information 2020 2019 In millions Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 482 $ 544 Operating cash flows for finance leases $ 25 $ 25 Financing cash flows for finance leases $ 58 $ 34 The following table summarizes the lease-related assets and liabilities recorded in the consolidated balance sheets at December 31, 2020 and 2019. Lease Position Balance Sheet Classification Dec 31, 2020 Dec 31, 2019 In millions Right-of-use assets obtained in exchange for lease obligations: Operating leases 1 $ 185 $ 2,476 Finance leases $ 178 $ 89 Assets Operating lease assets Operating lease right-of-use assets $ 1,856 $ 2,072 Finance lease assets Property 665 486 Finance lease amortization Accumulated depreciation (216) (167) Total lease assets $ 2,305 $ 2,391 Liabilities Current Operating Operating lease liabilities - current $ 416 $ 421 Finance Long-term debt due within one year 54 32 Noncurrent Operating Operating lease liabilities - noncurrent 1,521 1,739 Finance Long-Term Debt 464 363 Total lease liabilities $ 2,455 $ 2,555 1. Includes $2.3 billion for the period ended December 31, 2019 related to the adoption of Topic 842. See Note 1 for additional information. The weighted-average remaining lease term and discount rate for leases recorded in the consolidated balance sheets at December 31, 2020 and 2019 are provided below: Lease Term and Discount Rate Dec 31, 2020 Dec 31, 2019 Weighted-average remaining lease term Operating leases 7.6 years 8.0 years Finance leases 11.6 years 12.3 years Weighted-average discount rate Operating leases 3.84 % 4.09 % Finance leases 5.41 % 6.28 % The following table provides the maturities of lease liabilities at December 31, 2020: Maturities of Lease Liabilities Operating Leases Finance Leases In millions 2021 $ 477 $ 78 2022 387 74 2023 312 98 2024 242 45 2025 164 41 2026 and thereafter 703 373 Total future undiscounted lease payments $ 2,285 $ 709 Less: Imputed interest 348 191 Total present value of lease liabilities $ 1,937 $ 518 At December 31, 2020, Dow had additional leases of approximately $56 million, primarily for buildings and equipment, which had not yet commenced. These leases are expected to commence in 2021 and 2022, with lease terms of up to 10 years. Dow provides guarantees related to certain leased assets, specifying the residual value that will be available to the lessor at lease termination through the sale of the assets to the lessee or third parties. The following table provides a summary of the final expiration, maximum future payments and recorded liability reflected in the consolidated balance sheets for residual value guarantees at December 31, 2020 and 2019. There was $22 million of recorded liability related to these residual value guarantees at December 31, 2020 (zero at December 31, 2019), as payment of such residual value guarantees was determined to be probable. The lease agreements do not contain any material restrictive covenants. Lease Guarantees Dec 31, 2020 Dec 31, 2019 In millions Final Expiration Maximum Future Payments Recorded Liability Final Expiration Maximum Future Payments Recorded Liability Residual value guarantees 2030 $ 818 $ 22 2028 $ 792 $ —

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY Common Stock Dow Inc. Dow Inc. was incorporated in 2018 with 100 authorized and issued shares of common stock, par value $0.01 per share, owned solely by its parent company, DowDuPont. In the first quarter of 2019, in connection with the separation and distribution of DowDuPont’s materials science business, the number of authorized shares of common stock was increased to 5,000,000,000 shares, par value $0.01 per share, and Dow Inc.'s 100 shares of issued common stock were recapitalized into 748,771,240 shares of common stock. Dow Inc.'s common stock was solely owned by DowDuPont through March 31, 2019, and on April 1, 2019, Dow Inc. became an independent, publicly traded company. Dow Inc. common stock is listed on the NYSE under the symbol “DOW.” See Note 3 for additional information. The Company may issue shares of Dow Inc. common stock out of treasury stock or as new shares of common stock for options exercised and for the release of restricted stock units ("RSUs"), performance stock units ("PSUs") and restricted stock. Common stock shares issued to employees and non-employee directors was approximately 4.8 million in 2020. Subsequent to the separation from DowDuPont, the number of new Dow Inc. common stock shares issued to employees and non-employee directors was approximately 2.5 million in 2019. See Note 21 for additional information on the Company's equity awards. TDCC Effective with the Merger and through March 31, 2019, TDCC had 100 authorized and issued shares of common stock, par value $0.01 per share, owned solely by DowDuPont. Effective with the separation from DowDuPont, TDCC became a wholly owned subsidiary of Dow Inc., which now holds all 100 authorized and issued shares of common stock of TDCC. See Note 3 for additional information. Retained Earnings Dow Inc. There are no significant restrictions limiting Dow Inc.’s ability to pay dividends. Dow Inc. declared dividends of $2.80 per share in 2020 ($2.10 per share in 2019, subsequent to the separation from DowDuPont). Undistributed earnings of nonconsolidated affiliates included in retained earnings were $716 million at December 31, 2020 and $852 million at December 31, 2019. TDCC Effective with the Merger, TDCC no longer had publicly traded common stock. TDCC's common shares were owned solely by DowDuPont, prior to the separation on April 1, 2019, and TDCC's Board determined whether or not there would be a dividend distribution to DowDuPont. Effective with the separation from DowDuPont on April 1, 2019, TDCC became a wholly owned subsidiary of Dow Inc. and TDCC's Board determines whether or not there will be a dividend distribution to Dow Inc. In 2020 and 2019, TDCC declared and paid dividends to Dow Inc. of $2,233 million and $201 million, respectively. In 2019 and 2018, TDCC declared and paid dividends to DowDuPont of $535 million and $3,711 million, respectively. Employee Stock Ownership Plan The Dow Employee Stock Ownership Plan (the “ESOP”) is an integral part of The Dow Chemical Company Employees’ Savings Plan (the “Savings Plan”). A significant majority of full-time employees in the United States are eligible to participate in the Savings Plan. The Company uses the ESOP to provide its matching contribution in the form of stock to Plan participants. Effective with the Merger, shares of TDCC Common Stock held by the ESOP were converted into shares of DowDuPont Common Stock at a ratio of 1:1. Effective with the separation from DowDuPont, the DowDuPont Common Stock held by the ESOP received a Dow Inc. Common Stock share dividend at a ratio of 3:1, resulting in the ESOP holding both DowDuPont and Dow Inc. shares. Subsequent to the separation from DowDuPont, the ESOP independent fiduciary sold the DowDuPont shares and purchased additional Dow Inc. shares with the proceeds. In connection with the acquisition of Rohm and Haas on April 1, 2009, the Rohm and Haas Employee Stock Ownership Plan (the "Rohm and Haas ESOP") was merged into the Savings Plan, and the Company assumed the $78 million balance of debt at 9.8 percent interest with final maturity in 2020 that was used to finance share purchases by the Rohm and Haas ESOP in 1990. The debt was fully repaid in 2020 which resulted in an outstanding balance of zero at December 31, 2020 ($3 million at December 31, 2019). Dividends on unallocated shares held by the ESOP are used by the ESOP to make debt service payments and to purchase additional shares if dividends exceed the debt service payments. Dividends on allocated shares are used by the ESOP to make debt service payments to the extent needed; otherwise, they are paid to the Savings Plan participants. Shares are released for allocation to participants based on the ratio of the current year’s debt service to the sum of the principal and interest payments over the life of the loan. The shares are allocated to Plan participants in accordance with the terms of the Savings Plan. The unallocated shares are excluded from the Company's earnings per share calculation. Compensation expense for allocated shares is recorded at the fair value of the shares on the date of allocation. Compensation expense reflected in income from continuing operations for ESOP shares was $72 million in 2020, $77 million in 2019 and $144 million in 2018. At December 31, 2020, 4.4 million shares out of a total 6.1 million shares held by the ESOP had been allocated to participants’ accounts and 1.7 million shares, at a fair value of $93 million, were considered unearned. Treasury Stock Dow Inc. On April 1, 2019, Dow Inc.'s Board ratified the share repurchase program originally approved on March 15, 2019, authorizing up to $3 billion to be spent on the repurchase of the Company's common stock, with no expiration date. In 2020, Dow Inc. repurchased $125 million of Dow Inc. common stock ($500 million in 2019). At December 31, 2020, $2.4 billion of the share repurchase program authorization remained available for repurchases. The Company may issue shares of Dow Inc. common stock out of treasury stock or as new shares of common stock for options exercised and for the release of RSUs, PSUs and restricted stock. The Company did not issue any treasury shares to employees and non-employee directors under its stock-based compensation programs for the years ended December 31, 2020 and 2019. See Note 21 for additional information on changes to the Company's equity awards in connection with the separation from DowDuPont. The following table provides a reconciliation of Dow Inc. common stock activity for the years ended December 31, 2020 and 2019: Shares of Dow Inc. Common Stock Issued Held in Treasury Balance at Jan 1, 2019 100 — Impact of recapitalization 748,771,140 — Issued 1 2,457,404 — Repurchased — 9,729,834 Balance at Jan 1, 2020 751,228,644 9,729,834 Issued 1 4,764,554 — Repurchased — 3,073,469 Balance at Dec 31, 2020 755,993,198 12,803,303 1. Shares issued to employees and non-employee directors under the Company's equity compensation plans. Accumulated Other Comprehensive Loss The changes in each component of AOCL for the years ended December 31, 2020, 2019 and 2018 were as follows: Accumulated Other Comprehensive Loss 2020 2019 2018 In millions Unrealized Gains (Losses) on Investments Beginning balance $ 64 $ (51) $ 17 Unrealized gains (losses) on investments 104 178 (93) Less: Tax (expense) benefit (23) (38) 19 Net unrealized gains (losses) on investments 81 140 (74) (Gains) losses reclassified from AOCL to net income 1 (54) (33) 9 Less: Tax expense (benefit) 2 13 8 (2) Net (gains) losses reclassified from AOCL to net income (41) (25) 7 Other comprehensive income (loss), net of tax 40 115 (67) Reclassification of stranded tax effects 3 — — (1) Ending balance $ 104 $ 64 $ (51) Cumulative Translation Adjustment Beginning balance $ (1,135) $ (1,813) $ (1,481) Gains (losses) on foreign currency translation 227 59 (215) Less: Tax (expense) benefit 25 (2) (6) Net gains (losses) on foreign currency translation 252 57 (221) (Gains) losses reclassified from AOCL to net income 4 (47) (89) (4) Other comprehensive income (loss), net of tax 205 (32) (225) Impact of common control transaction 5 — 710 — Reclassification of stranded tax effects 3 — — (107) Ending balance $ (930) $ (1,135) $ (1,813) Pension and Other Postretirement Benefits Beginning balance $ (8,781) $ (7,965) $ (6,998) Gains (losses) arising during the period (1,769) (1,699) (625) Less: Tax (expense) benefit 411 413 130 Net gains (losses) arising during the period (1,358) (1,286) (495) Amortization and recognition of net loss and prior service credits 6 753 504 594 Less: Tax expense (benefit) 2 (173) (117) (139) Net loss and prior service credits reclassified from AOCL to net income 580 387 455 Other comprehensive income (loss), net of tax (778) (899) (40) Impact of common control transaction 5 — 83 — Reclassification of stranded tax effects 3 — — (927) Ending balance $ (9,559) $ (8,781) $ (7,965) Derivative Instruments Beginning balance $ (394) $ (56) $ (109) Gains (losses) on derivative instruments (96) (470) 6 Less: Tax (expense) benefit (1) 101 (2) Net gains (losses) on derivative instruments (97) (369) 4 (Gains) losses reclassified from AOCL to net income 7 30 44 89 Less: Tax expense (benefit) 2 (9) (13) (18) Net (gains) losses reclassified from AOCL to net income 21 31 71 Other comprehensive income (loss), net of tax (76) (338) 75 Reclassification of stranded tax effects 3 — — (22) Ending balance $ (470) $ (394) $ (56) Total AOCL ending balance $ (10,855) $ (10,246) $ (9,885) 1. Reclassified to "Net sales" and "Sundry income (expense) - net." 2. Reclassified to "Provision for income taxes on continuing operations." 3. Amounts reclassified to "Retained earnings" as a result of the adoption of ASU 2018-02. 4. Reclassified to "Sundry income (expense) - net." 5. Reclassified to "Retained earnings" as a result of the separation from DowDuPont on April 1, 2019. See Note 3 for additional information. 6. These AOCL components are included in the computation of net periodic benefit cost of the Company's defined benefit pension and other postretirement benefit plans. See Note 20 for additional information. 7. Reclassified to "Cost of sales," "Sundry income (expense) - net" and "Interest expense and amortization of debt discount."

NONCONTROLLING INTERESTS

NONCONTROLLING INTERESTS	12 Months Ended
	Dec. 31, 2020
Noncontrolling Interest [Abstract]
NONCONTROLLING INTERESTS	NONCONTROLLING INTERESTS Ownership interests in the Company's subsidiaries held by parties other than the Company are presented separately from the Company's equity in the consolidated balance sheets as "Noncontrolling interests." The amount of consolidated net income attributable to the Company and the noncontrolling interests are both presented on the face of the consolidated statements of income. The following table summarizes the activity for equity attributable to noncontrolling interests for the years ended December 31, 2020, 2019 and 2018: Noncontrolling Interests In millions 2020 2019 2018 Balance at Jan 1 $ 553 $ 1,138 $ 1,186 Net income attributable to noncontrolling interests - continuing operations 69 74 102 Net income attributable to noncontrolling interests - discontinued operations — 13 32 Distributions to noncontrolling interests 1 (55) (77) (145) Impact of common control transaction 2 — (353) — Purchase of noncontrolling interests 3 — (254) — Deconsolidation of noncontrolling interests 4 (7) — — Cumulative translation adjustments 9 12 (39) Other 1 — 2 Balance at Dec 31 $ 570 $ 553 $ 1,138 1. Distributions to noncontrolling interests are net of $7 million in 2020 ($7 million in 2019 and $27 million in 2018) in dividends paid to a joint venture, which were reclassified to "Equity in earnings (losses) of nonconsolidated affiliates" in the consolidated statements of income. Also includes amounts attributable to discontinued operations of $7 million in 2019 and $37 million in 2018. 2. Related to the separation from DowDuPont. See Note 3 for additional information. 3. Related to the acquisition of full ownership in a propylene oxide manufacturing joint venture, which occurred on October 1, 2019. See Note 24 for additional information. As a result of this arrangement, the carrying value of the noncontrolling interest was removed, and “Additional paid-in capital” was adjusted by $38 million. 4. Related to the divestiture of the Company's interest in a cogeneration facility in Brazil in the third quarter of 2020. See Note 24 for additional information.

PENSION PLANS AND OTHER POSTRET

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS	PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS Defined Benefit Pension Plans The Company has both funded and unfunded defined benefit pension plans that cover employees in the United States and a number of other countries. The U.S. qualified plan covering the parent company is the largest plan. Benefits for employees hired before January 1, 2008, are based on length of service and the employee’s three highest consecutive years of compensation. Employees hired after January 1, 2008, earn benefits that are based on a set percentage of annual pay, plus interest. The Company's funding policy is to contribute to the plans when pension laws and/or economics either require or encourage funding. In 2020, the Company contributed $299 million to its pension plans, including contributions to fund benefit payments for the Company's unfunded pension plans. The Company expects to contribute approximately $300 million to its pension plans in 2021. The weighted-average assumptions used to determine pension plan obligations and net periodic benefit costs for all plans are summarized in the table below: Weighted-Average Assumptions for All Pension Plans Benefit Obligations Net Periodic Costs 2020 2019 2020 2019 2018 Discount rate 2.20 % 2.81 % 2.81 % 3.50 % 3.17 % Interest crediting rate for applicable benefits 3.55 % 3.51 % 3.51 % 3.72 % 3.61 % Rate of compensation increase 3.91 % 3.92 % 3.92 % 3.92 % 3.88 % Expected return on plan assets 7.00 % 7.11 % 7.11 % The weighted-average assumptions used to determine pension plan obligations and net periodic benefit costs for U.S. plans are summarized in the table below: Weighted-Average Assumptions for U.S. Pension Plans Benefit Obligations Net Periodic Costs 2020 2019 2020 2019 2018 Discount rate 2.71 % 3.41 % 3.41 % 4.15 % 3.66 % Interest crediting rate for applicable benefits 4.50 % 4.50 % 4.50 % 4.50 % 4.50 % Rate of compensation increase 4.25 % 4.25 % 4.25 % 4.25 % 4.25 % Expected return on plan assets 7.95 % 7.92 % 7.92 % Other Postretirement Benefit Plans The Company provides certain health care and life insurance benefits to retired employees and survivors. The Company’s plans outside of the United States are not significant; therefore, this discussion relates to the U.S. plans only. The plans provide health care benefits, including hospital, physicians’ services, drug and major medical expense coverage, and life insurance benefits. In general, for employees hired before January 1, 1993, the plans provide benefits supplemental to Medicare when retirees are eligible for these benefits. The Company and the retiree share the cost of these benefits, with the Company portion increasing as the retiree has increased years of credited service, although there is a cap on the Company portion. The Company has the ability to change these benefits at any time. Employees hired after January 1, 2008, are not covered under the plans. The Company funds most of the cost of these health care and life insurance benefits as incurred. In 2020, the Company did not make any contributions to its other postretirement benefit plan trusts. The trusts did not hold assets at December 31, 2020. The Company does not expect to contribute assets to its other postretirement benefit plan trusts in 2021. The weighted-average assumptions used to determine other postretirement benefit plan obligations and net periodic benefit costs for the U.S. plans are provided below: Weighted-Average Assumptions for U.S. Other Postretirement Benefits Plans Benefit Obligations Net Periodic Costs 2020 2019 2020 2019 2018 Discount rate 2.38 % 3.19 % 3.19 % 4.01 % 3.51 % Health care cost trend rate assumed for next year 6.75 % 6.25 % 6.25 % 6.50 % 6.75 % Rate to which the cost trend rate is assumed to decline (the ultimate health care cost trend rate) 5.00 % 5.00 % 5.00 % 5.00 % 5.00 % Year that the rate reaches the ultimate health care cost trend rate 2028 2025 2025 2025 2025 Assumptions The Company determines the expected long-term rate of return on plan assets by performing a detailed analysis of key economic and market factors driving historical returns for each asset class and formulating a projected return based on factors in the current environment. Factors considered include, but are not limited to, inflation, real economic growth, interest rate yield, interest rate spreads and other valuation measures and market metrics. The expected long-term rate of return for each asset class is then weighted based on the strategic asset allocation approved by the governing body for each plan. The Company’s historical experience with the pension fund asset performance is also considered. The Company uses the spot rate approach to determine the discount rate utilized to measure the service cost and interest cost components of net periodic pension and other postretirement benefit costs for the U.S. and other selected countries. Under the spot rate approach, the Company calculates service cost and interest cost by applying individual spot rates from the Willis Towers Watson RATE:Link yield curve (based on high-quality corporate bond yields) for each selected country to the separate expected cash flow components of service cost and interest cost. Service cost and interest cost for all other plans are determined on the basis of the single equivalent discount rates derived in determining those plan obligations. The discount rates utilized to measure the pension and other postretirement obligations of the U.S. plans are based on the yield on high-quality corporate fixed income investments at the measurement date. Future expected actuarially determined cash flows for the Company’s U.S. plans are individually discounted at the spot rates under the Willis Towers Watson U.S. RATE:Link 60-90 corporate yield curve (based on 60th to 90th percentile high-quality corporate bond yields) to arrive at the plan’s obligations as of the measurement date. The Company utilizes a modified version of the Society of Actuaries’ mortality tables released in 2014 and a modified version of the generational mortality improvement scale released in 2018 for purposes of measuring the U.S. pension and other postretirement obligations, based on an evaluation of the mortality experience of the Company’s pension plans. Separation from DowDuPont As a result of the Company’s separation from DowDuPont in 2019, the number of significant defined benefit pension plans administered by the Company decreased from 45 plans to 35 plans, with approximately $270 million of net unfunded pension liabilities transferred to DowDuPont. Plans administered by other subsidiaries of DowDuPont that were transferred to the Company were not significant. There were no changes in the number of significant other postretirement benefit plans administered by the Company as a result of the separation. Existing Company plans that were significantly impacted by the transfer of active plan participants to DowDuPont were remeasured, resulting in curtailment gains and losses and recognition of special termination benefits. Summarized information on the Company's pension and other postretirement benefit plans is as follows: Change in Projected Benefit Obligations, Plan Assets and Funded Status of All Significant Plans Defined Benefit Pension Plans Other Postretirement Benefit Plans In millions 2020 2019 2020 2019 Change in projected benefit obligations: Benefit obligations at beginning of year $ 32,621 $ 29,600 $ 1,535 $ 1,478 Impact of plans transferred to DowDuPont at separation — (331) — — Service cost 399 396 7 8 Interest cost 767 921 40 49 Plan participants' contributions 12 12 — — Actuarial changes in assumptions and experience 3,021 3,904 7 148 Benefits paid (1,569) (1,684) (132) (148) Plan amendments 8 — — — Acquisitions/divestitures/other 1 (692) (37) — — Effect of foreign exchange rates 791 14 7 3 Termination benefits/curtailments/settlements 2 (49) (174) — (3) Benefit obligations at end of year $ 35,309 $ 32,621 $ 1,464 $ 1,535 Change in plan assets: Fair value of plan assets at beginning of year $ 24,908 $ 22,544 $ — $ — Impact of plans transferred to DowDuPont at separation — (61) — — Actual return on plan assets 2,877 3,790 — — Employer contributions 299 266 — — Plan participants' contributions 12 12 — — Benefits paid (1,569) (1,684) — — Other 3 (681) — — — Effect of foreign exchange rates 571 41 — — Settlements (11) — — — Fair value of plan assets at end of year $ 26,406 $ 24,908 $ — $ — Funded status: U.S. plans with plan assets $ (5,873) $ (4,768) $ — $ — Non-U.S. plans with plan assets (2,222) (2,207) — — All other plans (808) (738) (1,464) (1,535) Funded status at end of year $ (8,903) $ (7,713) $ (1,464) $ (1,535) Amounts recognized in the consolidated balance sheets at Dec 31: Deferred charges and other assets $ 1,007 $ 623 $ — $ — Accrued and other current liabilities (54) (49) (113) (128) Pension and other postretirement benefits - noncurrent (9,856) (8,287) (1,351) (1,407) Net amount recognized $ (8,903) $ (7,713) $ (1,464) $ (1,535) Pretax amounts recognized in accumulated other comprehensive loss at Dec 31: Net loss (gain) $ 12,736 $ 11,761 $ (129) $ (147) Prior service credit (154) (177) — — Pretax balance in accumulated other comprehensive loss at end of year $ 12,582 $ 11,584 $ (129) $ (147) 1. The 2020 impact relates primarily to the transfer of benefit obligations in the U.S. through the purchase of annuity contracts from an insurance company. The 2019 impact includes the divestiture of a business with pension benefit obligations of $53 million. 2. The 2020 impact relates to pension plan curtailments of a European plan resulting from the 2020 Restructuring Program and the settlement of certain plan obligations of a U.S. non-qualified pension plan resulting from lump-sum payments. The 2019 impact relates to plan curtailments and associated special termination benefits resulting from the reduction in plan participation due to the separation from DowDuPont. 3. The 2020 impact relates to the purchase of annuity contracts associated with the transfer of benefit obligations to an insurance company. A significant component of the overall increase in the Company's benefit obligation for the year ended December 31, 2020 was due to the change in weighted-average discount rates, which decreased from 2.81 percent at December 31, 2019 to 2.20 percent at December 31, 2020. A significant component of the overall increase in the Company's benefit obligation for the year ended December 31, 2019 was due to the change in weighted-average discount rates, which decreased from 3.69 percent at December 31, 2018 to 2.81 percent at December 31, 2019. The accumulated benefit obligation for all significant pension plans was $34.1 billion and $31.4 billion at December 31, 2020 and 2019, respectively. Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets at Dec 31 2020 2019 In millions Accumulated benefit obligations $ 29,084 $ 26,959 Fair value of plan assets $ 20,130 $ 19,571 Pension Plans with Projected Benefit Obligations in Excess of Plan Assets at Dec 31 2020 2019 In millions Projected benefit obligations $ 30,161 $ 28,013 Fair value of plan assets $ 20,251 $ 19,677 Net Periodic Benefit Costs for All Significant Plans for the Year Ended Dec 31 Defined Benefit Pension Plans Other Postretirement Benefit Plans In millions 2020 2019 2018 2020 2019 2018 Net Periodic Benefit Costs: Service cost $ 399 $ 396 $ 520 $ 7 $ 8 $ 12 Interest cost 767 921 886 40 49 45 Expected return on plan assets (1,658) (1,679) (1,644) — — — Amortization of prior service credit (19) (20) (24) — — — Amortization of unrecognized (gain) loss 773 574 642 (10) (20) (24) Curtailment/settlement/other 1 9 (27) — — (3) — Net periodic benefit costs $ 271 $ 165 $ 380 $ 37 $ 34 $ 33 Less: discontinued operations — 21 101 — — 3 Net periodic benefit costs - continuing operations $ 271 $ 144 $ 279 $ 37 $ 34 $ 30 Changes in plan assets and benefit obligations recognized in other comprehensive (income) loss: Net (gain) loss $ 1,753 $ 1,606 $ 584 $ 8 $ 145 $ (13) Prior service cost 8 — 17 — — — Amortization of prior service credit 19 20 24 — — — Amortization of unrecognized gain (loss) (773) (574) (642) 10 20 24 Common control transaction 2 — (112) — — — — Curtailment and settlement gain (loss) 1 (9) 27 — — 3 — Total recognized in other comprehensive (income) loss $ 998 $ 967 $ (17) $ 18 $ 168 $ 11 Total recognized in net periodic benefit cost and other comprehensive (income) loss $ 1,269 $ 1,132 $ 363 $ 55 $ 202 $ 44 1. The 2020 impact relates to pension plan curtailments of a European plan resulting from the 2020 Restructuring Program and the settlement of certain plan obligations of a U.S. non-qualified pension plan resulting from lump-sum payments. The 2019 impact relates to plan curtailments and associated special termination benefits resulting from the reduction in plan participation due to the separation from DowDuPont. 2. The 2019 impact is the result of the separation from DowDuPont. Except for plan curtailment costs related to the 2020 Restructuring Program, which are included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income, non-service cost components of net periodic benefit cost are included in "Sundry income (expense) - net" in the consolidated statements of income. See Notes 6 and 7 for additional information. Estimated Future Benefit Payments The estimated future benefit payments of continuing operations, reflecting expected future service, as appropriate, are presented in the following table: Estimated Future Benefit Payments at Dec 31, 2020 Defined Benefit Pension Plans Other Postretirement Benefit Plans In millions 2021 $ 1,647 $ 114 2022 1,595 103 2023 1,593 102 2024 1,604 101 2025 1,641 100 2026-2030 8,419 449 Total $ 16,499 $ 969 Plan Assets Plan assets consist primarily of equity and fixed income securities of U.S. and foreign issuers, and include alternative investments, such as real estate, private equity and absolute return strategies. Plan assets totaled $26.4 billion at December 31, 2020 and $24.9 billion at December 31, 2019 and included no directly held common stock of Dow Inc. The Company's investment strategy for the plan assets is to manage the assets in relation to the liability in order to pay retirement benefits to plan participants over the life of the plans. This is accomplished by identifying and managing the exposure to various market risks, diversifying investments across various asset classes and earning an acceptable long-term rate of return consistent with an acceptable amount of risk, while considering the liquidity needs of the plans. The plans are permitted to use derivative instruments for investment purposes, as well as for hedging the underlying asset and liability exposure and rebalancing the asset allocation. The plans use value-at-risk, stress testing, scenario analysis and Monte Carlo simulations to monitor and manage both the risk within the portfolios and the surplus risk of the plans. Equity securities primarily include investments in large- and small-cap companies located in both developed and emerging markets around the world. Fixed income securities include investment and non-investment grade corporate bonds of companies diversified across industries, U.S. treasuries, non-U.S. developed market securities, U.S. agency mortgage-backed securities, emerging market securities and fixed income related funds. Alternative investments primarily include investments in real estate, private equity and absolute return strategies. Other significant investment types include various insurance contracts and interest rate, equity, commodity and foreign exchange derivative investments and hedges. The Company mitigates the credit risk of investments by establishing guidelines with investment managers that limit investment in any single issue or issuer to an amount that is not material to the portfolio being managed. These guidelines are monitored for compliance both by the Company and external managers. Credit risk related to derivative activity is mitigated by utilizing multiple counterparties, collateral support agreements and centralized clearing, where appropriate. A short-term investment money market fund is utilized as the sweep vehicle for the U.S. plans, which from time to time can represent a significant investment. For one U.S. plan, approximately 31 percent of the liability is covered by a participating group annuity issued by Prudential Insurance Company. The weighted-average target allocation for plan assets of the Company's pension plans is summarized as follows: Target Allocation for Plan Assets at Dec 31, 2020 Target Allocation Asset Category Equity securities 35 % Fixed income securities 36 Alternative investments 28 Other investments 1 Total 100 % Fair value calculations may not be indicative of net realizable value or reflective of future fair values. Furthermore, although the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. For pension plan assets classified as Level 1 measurements (measured using quoted prices in active markets), total fair value is either the price of the most recent trade at the time of the market close or the official close price, as defined by the exchange on which the asset is most actively traded on the last trading day of the period, multiplied by the number of units held without consideration of transaction costs. For pension plan assets classified as Level 2 measurements, where the security is frequently traded in less active markets, fair value is based on the closing price at the end of the period; where the security is less frequently traded, fair value is based on the price a dealer would pay for the security or similar securities, adjusted for any terms specific to that asset or liability. Market inputs are obtained from well-established and recognized vendors of market data and subjected to tolerance and quality checks. For derivative assets and liabilities, standard industry models are used to calculate the fair value of the various financial instruments based on significant observable market inputs, such as foreign exchange rates, commodity prices, swap rates, interest rates and implied volatilities obtained from various market sources. For other pension plan assets for which observable inputs are used, fair value is derived through the use of fair value models, such as a discounted cash flow model or other standard pricing models. For pension plan assets classified as Level 3 measurements, total fair value is based on significant unobservable inputs including assumptions where there is little, if any, market activity for the investment. Certain pension plan assets are held in funds where fair value is based on an estimated net asset value per share (or its equivalent) as of the most recently available fund financial statements which are received on a monthly or quarterly basis. These valuations are reviewed for reasonableness based on applicable sector, benchmark and company performance. Adjustments to valuations are made where appropriate to arrive at an estimated net asset value per share at the measurement date. These funds are not classified within the fair value hierarchy. The following table summarizes the bases used to measure the Company’s pension plan assets at fair value for the years ended December 31, 2020 and 2019: Basis of Fair Value Measurements Dec 31, 2020 Dec 31, 2019 In millions Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 1,298 $ 1,103 $ 195 $ — $ 754 $ 675 $ 79 $ — Equity securities: U.S. equity securities 1 $ 3,934 $ 3,911 $ 22 $ 1 $ 3,844 $ 3,752 $ 91 $ 1 Non - U.S. equity securities 5,186 4,213 964 9 4,646 3,819 801 26 Total equity securities $ 9,120 $ 8,124 $ 986 $ 10 $ 8,490 $ 7,571 $ 892 $ 27 Fixed income securities: Debt - government-issued $ 4,998 $ 128 $ 4,870 $ — $ 4,992 $ 197 $ 4,795 $ — Debt - corporate-issued 3,970 553 3,416 1 3,697 607 3,089 1 Debt - asset-backed 103 — 102 1 70 — 69 1 Total fixed income securities $ 9,071 $ 681 $ 8,388 $ 2 $ 8,759 $ 804 $ 7,953 $ 2 Alternative investments: Private markets $ 13 $ — $ — $ 13 $ 11 $ — $ — $ 11 Real estate 51 51 — — 25 25 — — Derivatives - asset position 697 2 695 — 574 2 572 — Derivatives - liability position (594) (1) (593) — (513) (2) (511) — Total alternative investments $ 167 $ 52 $ 102 $ 13 $ 97 $ 25 $ 61 $ 11 Other investments $ 472 $ 22 $ 448 $ 2 $ 411 $ 28 $ 383 $ — Subtotal $ 20,128 $ 9,982 $ 10,119 $ 27 $ 18,511 $ 9,103 $ 9,368 $ 40 Investments measured at net asset value: Hedge funds $ 1,350 $ 1,595 Private markets 3,135 2,794 Real estate 1,886 2,110 Total investments measured at net asset value $ 6,371 $ 6,499 Items to reconcile to fair value of plan assets: Pension trust receivables 2 $ 66 $ 70 Pension trust payables 3 (159) (172) Total $ 26,406 $ 24,908 1. No Dow Inc. common stock was directly held at December 31, 2020 or December 31, 2019. 2. Primarily receivables for investment securities sold. 3. Primarily payables for investment securities purchased. The following table summarizes the changes in the fair value of Level 3 pension plan assets for the years ended December 31, 2020 and 2019: Fair Value Measurement of Level 3 Pension Plan Assets Equity Securities Fixed Income Securities Alternative Investments Other Investments Total In millions Balance at Jan 1, 2019 $ 39 $ 1 $ 1 $ — $ 41 Actual return on assets: Relating to assets sold during 2019 (2) — — — (2) Relating to assets held at Dec 31, 2019 1 — (14) — (13) Purchases, sales and settlements, net (11) 1 24 — 14 Balance at Dec 31, 2019 $ 27 $ 2 $ 11 $ — $ 40 Actual return on assets: Relating to assets sold during 2020 — — (11) — (11) Relating to assets held at Dec 31, 2020 (1) — 8 (1) 6 Purchases, sales and settlements, net (19) (1) 5 3 (12) Transfers into Level 3, net 3 1 — — 4 Balance at Dec 31, 2020 $ 10 $ 2 $ 13 $ 2 $ 27 Defined Contribution Plans

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION The Company grants stock-based compensation to employees and non-employee directors in the form of stock incentive plans, which include stock options, stock appreciation rights, RSUs and restricted stock. The Company also provides stock-based compensation in the form of PSUs. In connection with the Merger, on August 31, 2017 ("Conversion Date"), all outstanding TDCC stock options and RSU awards were converted into stock options and RSU awards with respect to DowDuPont common stock. The stock options and RSU awards had the same terms and conditions under the applicable plans and award agreements prior to the Merger. All outstanding and nonvested PSU awards were converted into RSU awards with respect to DowDuPont common stock at the greater of the applicable performance target or the actual performance as of the effective time of the Merger. Changes in the fair value of liability instruments are recognized as compensation expense each quarter. TDCC and Historical DuPont did not merge their stock-based compensation plans as a result of the Merger. TDCC and Historical DuPont stock-based compensation plans were assumed by DowDuPont and continued in place with the ability to grant and issue DowDuPont common stock until separation. In connection with the separation on April 1, 2019, outstanding stock options, RSU and PSU awards were converted to Dow Inc. denominated awards under the “Employer Method,” or DowDuPont denominated awards under the “Shareholder Method,” and adjusted to maintain the intrinsic value of those awards before and after the date of the separation. In connection with the Corteva separation transaction on June 3, 2019, the outstanding DowDuPont denominated stock options, RSU and PSU awards were converted to Corteva and DuPont denominated awards and adjusted to maintain the intrinsic value of those awards before and after the date of the Corteva separation. The awards have the same terms and conditions under the applicable plans and award agreements prior to the separation transactions. The conversions of stock awards resulted in no incremental compensation expense. Approximately 5,000 employees were impacted by the conversion on April 1, 2019 in connection with Dow Inc.'s separation from DowDuPont. Approximately 4,000 employees were impacted by the conversion on June 3, 2019 in connection with the Corteva separation transaction. The total stock-based compensation expense included in continuing operations in the consolidated statements of income was $171 million, $158 million and $188 million in 2020, 2019 and 2018, respectively. The income tax benefits related to stock-based compensation arrangements were $39 million, $36 million and $42 million in 2020, 2019 and 2018, respectively. Amounts disclosed throughout the remainder of this footnote are inclusive of activity attributable to both continuing operations and discontinued operations, as the impact of discontinued operations is not significant. Accounting for Stock-Based Compensation The Company grants stock-based compensation awards that vest over a specified period or upon employees meeting certain performance and/or retirement eligibility criteria. The fair value of equity instruments issued to employees is measured on the grant date. The fair value of liability instruments (granted to executive employees subject to stock ownership requirements, that provide the recipient the option to elect to receive a cash payment equal to the value of the stock award on the date of delivery) is measured at the end of each quarter. The fair value of equity and liability instruments is expensed over the vesting period or, in the case of retirement, from the grant date to the date on which retirement eligibility provisions have been met and additional service is no longer required. The Company estimates expected forfeitures. The Company uses the Black-Scholes option valuation model to estimate the fair value of stock options. The weighted-average assumptions used to calculate total stock-based compensation are included in the following table: Weighted-Average Assumptions 2020 2019 2018 Dividend yield 5.80 % 5.10 % 2.13 % Expected volatility 26.70 % 26.10 % 23.34 % Risk-free interest rate 1.49 % 2.43 % 2.83 % Expected life of stock options granted during period (years) 6.1 6.1 6.2 The dividend yield assumption was equal to the dividend yield on the grant date, which reflected the Company's quarterly dividend payments of $0.70 per share in 2020 on Dow Inc. Common Stock ($0.70 per share in 2019 on Dow Inc. Common Stock and $0.38 per share in 2018 on DowDuPont Common Stock). The expected volatility assumptions for the 2020, 2019 and 2018 stock options were based on an equal weighting of the historical daily volatility for the expected term of the awards and current implied volatility from exchange-traded options. The expected volatility assumption for the market portion of the 2020 and 2019 PSU awards were based on historical daily volatility for the term of the award. The risk-free interest rate was based on the U.S. Treasury strip rates over the expected life of the 2020, 2019 and 2018 options. The expected life of stock options granted was based on an analysis of historical exercise patterns. Stock Incentive Plan The Company has historically granted equity awards under various plans (the "Prior Plans"). On February 9, 2012, the Board authorized The Dow Chemical Company 2012 Stock Incentive Plan (the "2012 Plan"), which was approved by stockholders at TDCC's annual meeting on May 10, 2012 ("2012 Plan Effective Date") and became effective on that date. On February 13, 2014, the Board adopted The Dow Chemical Company Amended and Restated 2012 Stock Incentive Plan (the "2012 Restated Plan"). The 2012 Restated Plan was approved by stockholders at TDCC's annual meeting on May 15, 2014, and became effective on that date. The Prior Plans were superseded by the 2012 Plan and the 2012 Restated Plan (collectively, the "2012 Plan"). Under the 2012 Plan, the Company may grant options, RSUs, PSUs, restricted stock, stock appreciation rights and stock units to employees and non-employee directors until the tenth anniversary of the 2012 Plan Effective Date, subject to an aggregate limit and annual individual limits. The terms of the grants are fixed at the grant date. TDCC's stock-based compensation programs were assumed by DowDuPont and continued in place with the ability to grant and issue DowDuPont common stock until separation. On April 1, 2019 ("Original Effective Date"), in connection with the separation, the Company adopted the 2019 Stock Incentive Plan (the "2019 Plan"). Under the 2019 Plan, the Company may grant stock options, RSUs, PSUs, stock appreciation rights and stock units to employees and non-employee directors until the tenth anniversary of the Original Effective Date, subject to an aggregate limit and annual individual limits. The terms of the grants are fixed at the grant date. At December 31, 2020, there were approximately 16 million shares of common stock available for grant under the 2019 Plan. Stock Options The Company grants stock options to certain employees, subject to certain annual and individual limits, with terms of the grants fixed at the grant date. The exercise price of each stock option equals the market price of the common stock on the grant date. Options vest from one Stock Options 2020 Shares in thousands Shares Exercise Price 1 Outstanding at Jan 1, 2020 21,265 $ 45.96 Granted 2,191 $ 48.30 Exercised (3,002) $ 36.78 Forfeited/Expired (202) $ 59.70 Outstanding at Dec 31, 2020 20,252 $ 47.44 Remaining contractual life in years 4.63 Aggregate intrinsic value in millions $ 209 Exercisable at Dec 31, 2020 16,564 $ 46.11 Remaining contractual life in years 3.76 Aggregate intrinsic value in millions $ 192 1. Weighted-average per share. Additional Information about Stock Options In millions, except per share amounts 2020 2019 2018 Weighted-average fair value per share of options granted $ 5.89 $ 7.99 $ 15.38 Total compensation expense for stock option plans $ 22 $ 23 $ 68 Related tax benefit $ 5 $ 5 $ 15 Total amount of cash received from the exercise of options $ 108 $ 93 $ 112 Total intrinsic value of options exercised 1 $ 41 $ 77 $ 160 Related tax benefit $ 9 $ 17 $ 36 1. Difference between the market price at exercise and the price paid by the employee to exercise the options. Total unrecognized compensation cost related to unvested stock option awards of $8 million at December 31, 2020, is expected to be recognized over a weighted-average period of 1.34 years. Restricted Stock Units The Company grants RSUs to certain employees and non-employee directors. The grants vest after a designated period of time, generally three years for employees and two years for non-employee directors. The following table shows changes in nonvested RSUs: RSU Awards 2020 Shares in thousands Shares Grant Date Fair Value 1 Nonvested at Jan 1, 2020 2,454 $ 59.98 Granted 2,065 $ 47.66 Vested (1,422) $ 55.53 Canceled (90) $ 54.69 Nonvested at Dec 31, 2020 3,007 $ 53.78 1. Weighted-average per share. Additional Information about RSUs In millions, except per share amounts 2020 2019 2018 Weighted-average fair value per share of RSUs granted $ 47.66 $ 54.78 $ 71.46 Total fair value of RSUs vested 1 $ 106 $ 264 $ 382 Related tax benefit $ 24 $ 59 $ 86 Total compensation expense for RSU awards $ 93 $ 110 $ 144 Related tax benefit $ 21 $ 25 $ 32 1. Includes the fair value of shares vested in prior years and delivered in the reporting year. In 2020, the Company paid $4 million in cash, equal to the value of the stock award on the date of delivery, to certain executive employees to settle approximately 85,000 RSUs (341,000 RSUs settled in cash for $19 million in 2019 and 625,000 RSUs settled in cash for $45 million in 2018). Total unrecognized compensation cost related to RSU awards of $75 million at December 31, 2020 is expected to be recognized over a weighted-average period of 1.69 years. At December 31, 2020, approximately 1.3 million RSUs with a grant date weighted-average fair value per share of $53.91 had previously vested, but were not issued. These shares are scheduled to be issued to employees within six months to three years or upon retirement. Performance Stock Units The Company grants PSUs to certain employees. The grants vest when the Company attains specified performance targets, such as return on capital and relative total shareholder return, over a predetermined period, generally one The following table shows the PSU awards granted: PSU Awards Target Shares Granted 1 Grant Date Fair Value 2 Shares in thousands Year Performance Period 2020 Jan 1, 2020 – Dec 31, 2022 1,426 $ 48.35 2019 Apr 1, 2019 – Dec 31, 2021 1,173 $ 57.58 2017 Sep 1, 2017 – Aug 31, 2019 232 $ 71.16 2017 3 Jan 1, 2017 – Dec 31, 2019 1,728 $ 81.99 1. At the end of the performance period, the actual number of shares issued can range from zero to 200 percent of target shares granted. 2. Weighted-average per share. 3. Converted to RSUs as a result of the Merger. The following table shows changes in nonvested PSUs: PSUs 2020 Shares in thousands Shares Grant Date Fair Value 1 Nonvested at Jan 1, 2020 1,121 $ 57.58 Granted 1,426 $ 48.35 Vested — $ — Canceled (59) $ 53.09 Nonvested at Dec 31, 2020 2,488 $ 53.78 1. Weighted-average per share. Additional Information about PSUs In millions, except share amounts 2020 2019 2018 Total fair value of PSUs vested and delivered 1 $ — $ 18 $ — Related tax benefit $ — $ 4 $ — Total compensation expense for PSU awards $ 56 $ 25 $ 12 Related tax benefit $ 13 $ 6 $ 3 Shares of PSUs settled in cash (in thousands) 2 — 162 — Total cash paid to settle PSUs 3 $ — $ 13 $ — 1. Includes the fair value of shares vested in prior years and delivered in the reporting year. 2. PSU awards vested in prior years and delivered in the reporting year. 3. Cash paid to certain executive employees for PSU awards vested in prior periods and delivered in the reporting year, equal to the value of the stock award on the date of delivery. Total unrecognized compensation cost related to PSU awards of $31 million at December 31, 2020, is expected to be recognized over a weighted-average period of 1.67 years. Restricted Stock

FINANCIAL INSTRUMENTS

FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2020
Investments, All Other Investments [Abstract]
FINANCIAL INSTRUMENTS	FINANCIAL INSTRUMENTS The following table summarizes the fair value of financial instruments at December 31, 2020 and 2019: Fair Value of Financial Instruments at Dec 31 2020 2019 In millions Cost Gain Loss Fair Value Cost Gain Loss Fair Value Cash equivalents: Held-to-maturity securities 1 $ 980 $ — $ — $ 980 $ 220 $ — $ — $ 220 Money market funds 484 — — 484 408 — — 408 Total cash equivalents $ 1,464 $ — $ — $ 1,464 $ 628 $ — $ — $ 628 Marketable securities 2 $ 45 $ — $ — $ 45 $ 21 $ — $ — $ 21 Other investments: Debt securities: Government debt 3 $ 673 $ 35 $ (10) $ 698 $ 533 $ 33 $ (11) $ 555 Corporate bonds 822 119 (5) 936 944 80 (10) 1,014 Total debt securities $ 1,495 $ 154 $ (15) $ 1,634 $ 1,477 $ 113 $ (21) $ 1,569 Equity securities 4 6 34 — 40 10 6 (1) 15 Total other investments $ 1,501 $ 188 $ (15) $ 1,674 $ 1,487 $ 119 $ (22) $ 1,584 Total cash equivalents, marketable securities and other investments $ 3,010 $ 188 $ (15) $ 3,183 $ 2,136 $ 119 $ (22) $ 2,233 Long-term debt including debt due within one year 5 $ (16,951) $ 6 $ (3,659) $ (20,604) $ (16,410) $ 7 $ (2,258) $ (18,661) Derivatives relating to: Interest rates 6 $ — $ 41 $ (182) $ (141) $ — $ 8 $ (283) $ (275) Foreign currency — 69 (84) (15) — 101 (21) 80 Commodities 6 — 63 (84) (21) — 59 (115) (56) Total derivatives $ — $ 173 $ (350) $ (177) $ — $ 168 $ (419) $ (251) 1. The Company's held-to-maturity securities primarily included treasury bills and time deposits. 2. The Company's investments in marketable securities are included in "Other current assets" in the consolidated balance sheets. 3. U.S. Treasury obligations, U.S. agency obligations, U.S. agency mortgage-backed securities and other municipalities’ obligations. 4. Equity securities with a readily determinable fair value. 5. Cost includes fair value hedge adjustment gains of $69 million at December 31, 2020 and losses of $1 million at December 31, 2019 on $3,314 million of debt at December 31, 2020 and $3,490 million of debt at December 31, 2019. 6. Presented net of cash collateral where master netting arrangements allow. Cost approximates fair value for all other financial instruments. Debt Securities The Company’s investments in debt securities are primarily classified as available-for-sale. The following table provides the investing results from available-for-sale securities for the years ended December 31, 2020, 2019 and 2018. Investing Results In millions 2020 2019 2018 Proceeds from sales of available-for-sale securities $ 837 $ 1,138 $ 1,053 Gross realized gains $ 94 $ 51 $ 21 Gross realized losses $ 40 $ 18 $ 30 The following table summarizes the contractual maturities of the Company’s investments in debt securities: Contractual Maturities of Debt Securities at Dec 31, 2020 1 Cost Fair In millions Within one year $ 25 $ 25 One to five years 406 448 Six to ten years 649 685 After ten years 415 476 Total $ 1,495 $ 1,634 1. Includes marketable securities with maturities of less than one year. Portfolio managers regularly review the Company’s holdings to determine if any investments in debt securities are other-than-temporarily impaired. The analysis includes reviewing the amount of the impairment, as well as the length of time it has been impaired. The credit rating of the issuer, current credit rating trends, the trends of the issuer’s overall sector, the ability of the issuer to pay expected cash flows and the length of time the security has been in a loss position are considered in determining whether unrealized losses represent an other-than-temporary impairment. The Company did not have any credit-related losses in 2020, 2019 or 2018. The following table provides the fair value and gross unrealized losses of the Company’s investments in debt securities that were deemed to be temporarily impaired at December 31, 2020 and 2019, aggregated by investment category: Temporarily Impaired Debt Securities at Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Value Unrealized Losses In millions 2020 Government debt 1 $ 124 $ (3) $ 7 $ (7) $ 131 $ (10) Corporate bonds 55 (3) 12 (2) 67 (5) Total temporarily impaired debt securities $ 179 $ (6) $ 19 $ (9) $ 198 $ (15) 2019 Government debt 1 $ 55 $ (3) $ 23 $ (8) $ 78 $ (11) Corporate bonds 79 (3) 52 (7) 131 (10) Total temporarily impaired debt securities $ 134 $ (6) $ 75 $ (15) $ 209 $ (21) 1. U.S. Treasury obligations, U.S. agency obligations, U.S. agency mortgage-backed securities and other municipalities' obligations. Equity Securities There were no material adjustments to the carrying value of the not readily determinable investments for impairment or observable price changes for the year ended December 31, 2020. The net unrealized gain recognized in earnings on equity securities totaled $32 million for the year ended December 31, 2020 ($5 million net unrealized gain for the year ended December 31, 2019). Investments in Equity Securities Dec 31, 2020 Dec 31, 2019 In millions Readily determinable fair value $ 40 $ 15 Not readily determinable fair value $ 215 $ 189 Risk Management The Company’s business operations give rise to market risk exposure due to changes in foreign exchange rates, interest rates, commodity prices and other market factors such as equity prices. To manage such risks effectively, the Company enters into hedging transactions, pursuant to established guidelines and policies that enable it to mitigate the adverse effects of financial market risk. Derivatives used for this purpose are designated as hedges per the accounting guidance related to derivatives and hedging activities, where appropriate. A secondary objective is to add value by creating additional non-specific exposure within established limits and policies; derivatives used for this purpose are not designated as hedges. The potential impact of creating such additional exposures is not material to the Company’s results. Accounting guidance requires companies to recognize all derivative instruments as either assets or liabilities at fair value. The Company’s risk management program for interest rate, foreign currency and commodity risks is based on fundamental, mathematical and technical models that take into account the implicit cost of hedging. Risks created by derivative instruments and the mark-to-market valuations of positions are strictly monitored at all times, using value-at-risk and stress tests. Counterparty credit risk arising from these contracts is not significant because the Company minimizes counterparty concentration, deals primarily with major financial institutions of solid credit quality, and the majority of its hedging transactions mature in less than three months. In addition, the Company minimizes concentrations of credit risk through its global orientation by transacting with large, internationally diversified financial counterparties. It is the Company’s policy to not have credit risk-related contingent features in its derivative instruments. No significant concentration of counterparty credit risk existed at December 31, 2020. The Company does not anticipate losses from credit risk, and the net cash requirements arising from counterparty risk associated with risk management activities are not expected to be material in 2021. The Company revises its strategies as market conditions dictate and management reviews its overall financial strategies and the impacts from using derivatives in its risk management program with the Company’s senior leadership who also reviews these strategies with the Dow Inc. Board and/or relevant committees thereof. Derivative Instruments The notional amounts of the Company's derivative instruments presented on a net basis at December 31, 2020 and 2019, were as follows: Notional Amounts - Net Dec 31, 2020 Dec 31, 2019 In millions Derivatives designated as hedging instruments Interest rate contracts $ 612 $ 922 Foreign currency contracts $ 3,784 $ 6,253 Derivatives not designated as hedging instruments Interest rate contracts $ 94 $ 145 Foreign currency contracts $ 9,187 $ 5,567 The notional amounts of the Company's commodity derivatives presented on a net basis at December 31, 2020 and 2019, were as follows: Commodity Notionals - Net Dec 31, 2020 Dec 31, 2019 Notional Volume Unit Derivatives designated as hedging instruments Hydrocarbon derivatives 10.9 6.1 million barrels of oil equivalent Derivatives not designated as hedging instruments Hydrocarbon derivatives — 0.1 million barrels of oil equivalent Power derivatives — 87.5 thousands of megawatt hours Maturity Dates of Derivatives Designated as Hedging Instruments Year Interest rate contracts 2021 Foreign currency contracts 2021 Commodity contracts 2022 Interest Rate Risk Management The main objective of interest rate risk management is to reduce the total funding cost to the Company and to alter the interest rate exposure to the desired risk profile. To achieve this objective, the Company hedges using interest rate swaps, “swaptions,” and exchange-traded instruments. Foreign Currency Risk Management The global nature of the Company's business requires active participation in the foreign exchange markets. The Company has assets, liabilities and cash flows in currencies other than the U.S. dollar. The primary objective of the Company's foreign currency risk management is to optimize the U.S. dollar value of net assets and cash flows. To achieve this objective, the Company hedges on a net exposure basis using foreign currency forward contracts, over-the-counter option contracts, cross-currency swaps and nonderivative instruments in foreign currencies. Exposures primarily relate to assets, liabilities and bonds denominated in foreign currencies, as well as economic exposure, which is derived from the risk that currency fluctuations could affect the dollar value of future cash flows related to operating activities. Commodity Risk Management The Company has exposure to the prices of commodities in its procurement of certain raw materials. The primary purpose of commodity hedging activities is to manage the price volatility associated with these forecasted inventory purchases. Derivatives Not Designated in Hedging Relationships Foreign Currency Contracts The Company also uses foreign exchange forward contracts, options and cross-currency swaps that are not designated as hedging instruments primarily to manage foreign currency exposure. Commodity Contracts The Company utilizes futures, options and swap instruments that are effective as economic hedges of commodity price exposures, but do not meet hedge accounting criteria for derivatives and hedging, to reduce exposure to commodity price fluctuations on purchases of raw materials and inventory. Interest Rate Contracts The Company uses swap instruments that are not designated as hedging instruments to manage interest rate exposures. The Company uses interest rate swaps, "swaptions," and exchange-traded instruments to accomplish this objective. Accounting for Derivative Instruments and Hedging Activities Cash Flow Hedges For derivatives that are designated and qualify as cash flow hedging instruments, the gain or loss on the derivative is recorded in AOCL; it is reclassified to income in the same period or periods that the hedged transaction affects income. The unrealized amounts in AOCL fluctuate based on changes in the fair value of open contracts at the end of each reporting period. The Company anticipates volatility in AOCL and net income from its cash flow hedges. The amount of volatility varies with the level of derivative activities and market conditions during any period. The portion of the mark-to-market effects of the foreign currency contracts is recorded in AOCL; it is reclassified to income in the same period or periods that the underlying item affects income. Commodity swaps, futures and option contracts with maturities of not more than 60 months are utilized and designated as cash flow hedges of forecasted commodity purchases. The designated portion of the mark-to-market effect of the cash flow hedge instrument is recorded in AOCL; it is reclassified to income in the same period or periods that the underlying commodity purchase affects income. Fair Value Hedges For interest rate instruments that are designated and qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedge item attributable to the hedged risk are recognized in current period income and reflected as “Interest expense and amortization of debt discount” in the consolidated statements of income, except for amounts excluded from the assessment of effectiveness that are recognized in earnings through an amortization approach. Net Foreign Investment Hedges The Company designates derivatives that qualify as effective net foreign investment hedges, the results of which are presented in the effect of derivative instruments table. In addition, the Company utilizes non-derivative instruments as net foreign investment hedges. The Company had outstanding foreign-currency denominated debt designated as a hedge of net foreign investment of $194 million at December 31, 2020 ($184 million at December 31, 2019). The following tables provide the fair value and balance sheet classification of derivative instruments at December 31, 2020 and 2019: Fair Value of Derivative Instruments Dec 31, 2020 In millions Balance Sheet Classification Gross Counterparty and Cash Collateral Netting 1 Net Amounts Included in the Consolidated Balance Sheets Asset derivatives Derivatives designated as hedging instruments Interest rate contracts Other current assets $ 3 $ (3) $ — Foreign currency contracts Other current assets 39 (19) 20 Commodity contracts Other current assets 146 (109) 37 Commodity contracts Deferred charges and other assets 31 (8) 23 Total $ 219 $ (139) $ 80 Derivatives not designated as hedging instruments Interest rate contracts Deferred charges and other assets $ 41 $ — $ 41 Foreign currency contracts Other current assets 74 (25) 49 Commodity contracts Other current assets 4 (1) 3 Total $ 119 $ (26) $ 93 Total asset derivatives $ 338 $ (165) $ 173 Liability derivatives Derivatives designated as hedging instruments Interest rate contracts Accrued and other current liabilities $ 7 $ (3) $ 4 Foreign currency contracts Accrued and other current liabilities 93 (19) 74 Commodity contracts Accrued and other current liabilities 151 (112) 39 Commodity contracts Other noncurrent obligations 48 (9) 39 Total $ 299 $ (143) $ 156 Derivatives not designated as hedging instruments Interest rate contracts Other noncurrent obligations $ 178 $ — $ 178 Foreign currency contracts Accrued and other current liabilities 35 (25) 10 Commodity contracts Accrued and other current liabilities 9 (3) 6 Total $ 222 $ (28) $ 194 Total liability derivatives $ 521 $ (171) $ 350 1. Counterparty and cash collateral amounts represent the estimated net settlement amount when applying netting and set-off rights included in master netting arrangements between the Company and its counterparties and the payable or receivable for cash collateral held or placed with the same counterparty. Fair Value of Derivative Instruments Dec 31, 2019 In millions Balance Sheet Classification Gross Counterparty and Cash Collateral Netting 1 Net Amounts Included in the Consolidated Balance Sheets Asset derivatives Derivatives designated as hedging instruments Interest rate contracts Other current assets $ 21 $ (13) $ 8 Foreign currency contracts Other current assets 105 (36) 69 Commodity contracts Other current assets 44 (25) 19 Commodity contracts Deferred charges and other assets 28 (3) 25 Total $ 198 $ (77) $ 121 Derivatives not designated as hedging instruments Interest rate contracts Other current assets $ 14 $ (14) $ — Foreign currency contracts Other current assets 44 (12) 32 Commodity contracts Other current assets 18 (3) 15 Total $ 76 $ (29) $ 47 Total asset derivatives $ 274 $ (106) $ 168 Liability derivatives Derivatives designated as hedging instruments Interest rate contracts Accrued and other current liabilities $ 23 $ (13) $ 10 Interest rate contracts Other noncurrent obligations 1 — 1 Foreign currency contracts Accrued and other current liabilities 46 (36) 10 Commodity contracts Accrued and other current liabilities 95 (29) 66 Commodity contracts Other noncurrent obligations 38 (4) 34 Total $ 203 $ (82) $ 121 Derivatives not designated as hedging instruments Interest rate contracts Accrued and other current liabilities $ 136 $ (14) $ 122 Interest rate contracts Other noncurrent obligations 150 — 150 Foreign currency contracts Accrued and other current liabilities 23 (12) 11 Commodity contracts Accrued and other current liabilities 17 (3) 14 Commodity contracts Other noncurrent obligations 1 — 1 Total $ 327 $ (29) $ 298 Total liability derivatives $ 530 $ (111) $ 419 1. Counterparty and cash collateral amounts represent the estimated net settlement amount when applying netting and set-off rights included in master netting arrangements between the Company and its counterparties and the payable or receivable for cash collateral held or placed with the same counterparty. Assets and liabilities related to forward contracts, interest rate swaps, currency swaps, options and other conditional or exchange contracts executed with the same counterparty under a master netting arrangement are netted. Collateral accounts are netted with corresponding assets or liabilities, when applicable. The Company posted cash collateral of $7 million at December 31, 2020 ($5 million at December 31, 2019). No cash collateral was posted by counterparties with the Company at December 31, 2020 ($3 million at December 31, 2019). The following table summarizes the gain (loss) of derivative instruments in the consolidated statements of income and comprehensive income for the years ended December 31, 2020, 2019 and 2018: Effect of Derivative Instruments Amount of gain (loss) recognized in OCI 1 Amount of gain (loss) recognized in income 2 Income Statement Classification In millions 2020 2019 2018 2020 2019 2018 Derivatives designated as hedging instruments: Fair value hedges: Interest rate contracts $ — $ — $ — $ 69 $ 17 $ — Interest expense and amortization of debt discount 3 Excluded components 4 7 (3) — — — — Interest expense and amortization of debt discount Cash flow hedges: Interest rate contracts — (316) 26 (2) 1 (3) Interest expense and amortization of debt discount Foreign currency contracts (20) 16 19 3 28 (18) Cost of sales Foreign currency contracts — 10 (3) — 8 — Sundry income (expense) - net Commodity contracts (8) (6) (46) (31) (81) (69) Cost of sales Net foreign investment hedges: Foreign currency contracts (38) (52) 116 — — — Excluded components 4 27 162 — 20 99 — Sundry income (expense) - net Total derivatives designated as hedging instruments $ (32) $ (189) $ 112 $ 59 $ 72 $ (90) Derivatives not designated as hedging instruments: Interest rate contracts $ — $ — $ — $ (16) $ (4) $ — Interest expense and amortization of debt discount Foreign currency contracts — — — 28 45 101 Sundry income (expense) - net Commodity contracts — — — 11 (28) (12) Cost of sales Total derivatives not designated as hedging instruments $ — $ — $ — $ 23 $ 13 $ 89 Total derivatives $ (32) $ (189) $ 112 $ 82 $ 85 $ (1) 1. OCI is defined as other comprehensive income (loss). 2. Pretax amounts. 3. Gain (loss) recognized in income of derivatives is offset by gain (loss) recognized in income of the hedged item. 4. The excluded components are related to the time value of the derivatives designated as hedges. The following table provides the net after-tax amounts to be reclassified from AOCL to income within the next 12 months: Expected Reclassifications from AOCL within the next 12 months Dec 31, Cash flow hedges: Interest rate contracts $ (8) Commodity contracts $ (1) Foreign currency contracts $ (18) Net foreign investment hedges: Excluded components $ 2

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS Fair Value Measurements on a Recurring Basis The following table summarizes the bases used to measure certain assets and liabilities at fair value on a recurring basis: Basis of Fair Value Measurements on a Recurring Basis Dec 31, 2020 Dec 31, 2019 In millions Level 1 Level 2 Total Level 1 Level 2 Total Assets at fair value: Cash equivalents: Held-to-maturity securities 1 $ — $ 980 $ 980 $ — $ 220 $ 220 Money market funds — 484 484 — 408 408 Marketable securities 2 — 45 45 — 21 21 Equity securities 3 40 — 40 15 — 15 Debt securities: 3 Government debt 4 — 698 698 — 555 555 Corporate bonds 28 908 936 22 992 1,014 Derivatives relating to: 5 Interest rates — 44 44 — 35 35 Foreign currency — 113 113 — 149 149 Commodities 8 173 181 23 67 90 Total assets at fair value $ 76 $ 3,445 $ 3,521 $ 60 $ 2,447 $ 2,507 Liabilities at fair value: Long-term debt including debt due within one year 6 $ — $ 20,604 $ 20,604 $ — $ 18,661 $ 18,661 Derivatives relating to: 5 Interest rates — 185 185 — 310 310 Foreign currency — 128 128 — 69 69 Commodities 7 201 208 14 137 151 Total liabilities at fair value $ 7 $ 21,118 $ 21,125 $ 14 $ 19,177 $ 19,191 1. The Company's held-to-maturity securities primarily included treasury bills and time deposits. 2. The Company's investments in marketable securities are included in "Other current assets" in the consolidated balance sheets. 3. The Company's investments in debt securities, which are primarily available-for-sale, and equity securities are included in "Other investments" in the consolidated balance sheets. 4. U.S. Treasury obligations, U.S. agency obligations, U.S. agency mortgage-backed securities and other municipalities' obligations. 5. See Note 22 for the classification of derivatives in the consolidated balance sheets. 6. See Note 22 for information on fair value measurements of long-term debt. For assets and liabilities classified as Level 1 measurements (measured using quoted prices in active markets), total fair value is either the price of the most recent trade at the time of the market close or the official close price, as defined by the exchange on which the asset is most actively traded on the last trading day of the period, multiplied by the number of units held without consideration of transaction costs. For assets and liabilities classified as Level 2 measurements, where the security is frequently traded in less active markets, fair value is based on the closing price at the end of the period; where the security is less frequently traded, fair value is based on the price a dealer would pay for the security or similar securities, adjusted for any terms specific to that asset or liability, or by using observable market data points of similar, more liquid securities to imply the price. Market inputs are obtained from well-established and recognized vendors of market data and subjected to tolerance and quality checks. For derivative assets and liabilities, standard industry models are used to calculate the fair value of the various financial instruments based on significant observable market inputs, such as foreign exchange rates, commodity prices, swap rates, interest rates and implied volatilities obtained from various market sources. Market inputs are obtained from well-established and recognized vendors of market data and subjected to tolerance/quality checks. For all other assets and liabilities for which observable inputs are used, fair value is derived through the use of fair value models, such as a discounted cash flow model or other standard pricing models. See Note 22 for further information on the types of instruments used by the Company for risk management. There were no transfers between Levels 1 and 2 in the years ended December 31, 2020 and 2019. For assets classified as Level 3 measurements, the fair value is based on significant unobservable inputs including assumptions where there is little, if any, market activity. The fair value of the Company’s interests held in trade accounts receivable conduits is determined by calculating the expected amount of cash to be received using the key input of anticipated credit losses in the portfolio of receivables sold that have not yet been collected. Given the short-term nature of the underlying receivables, discount rate and prepayments are not factors in determining the fair value of the interests. See Note 14 for further information on assets classified as Level 3 measurements. For equity securities calculated at net asset value per share (or its equivalent), the Company had $111 million in private equity and $19 million in real estate at December 31, 2020 ($117 million in private equity and $18 million in real estate at December 31, 2019). There are no redemption restrictions and the unfunded commitments on these investments were $63 million at December 31, 2020 ($76 million at December 31, 2019). The following table summarizes the changes in fair value measurements using Level 3 inputs for the year ended December 31, 2018: Fair Value Measurements Using Level 3 Inputs for Interests Held in Trade Accounts Receivable Conduits 2018 In millions Balance at Jan 1 $ 677 Gain (loss) included in earnings 1 3 Settlements 2 (680) Balance at Dec 31 $ — 1. Included in "Selling, general and administrative expenses" in the consolidated statements of income. 2. Includes noncash transactions of $23 million for the year ended December 31, 2018. Fair Value Measurements on a Nonrecurring Basis The following table summarizes the bases used to measure certain assets at fair value on a nonrecurring basis in the consolidated balance sheets in 2020, 2019 and 2018: Basis of Fair Value Measurements on a Nonrecurring Basis at Dec 31 (Level 3) Total Losses In millions 2020 Assets at fair value: Long-lived assets and other assets $ 121 $ (245) 2019 Assets at fair value: Long-lived assets, other assets and equity method investments $ 162 $ (2,031) Goodwill $ — $ (1,039) 2018 Assets at fair value: Long-lived assets and other assets $ — $ (67) 2020 Fair Value Measurements on a Nonrecurring Basis As part of the 2020 Restructuring Program, the Company has or will shut down and write off several small manufacturing facilities and miscellaneous assets around the world. The assets associated with this plan were written down to zero. In addition, impairments of leased, non-manufacturing facilities, which were classified as Level 3 measurements, resulted in a write-down of right-of-use assets to a fair value of $110 million using unobservable inputs. The impairment charges related to the 2020 Restructuring Program, totaling $196 million, were included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Packaging & Specialty Plastics ($11 million), Industrial Intermediates & Infrastructure ($22 million), Performance Materials & Coatings ($116 million) and Corporate ($47 million). In 2020, the Company recognized impairment charges of $30 million related to the write-down of a non-manufacturing asset and certain corporate leased equipment and the write-off of a capital project. The assets, classified as Level 3 measurements, were valued at $11 million using unobservable inputs. The impairment charges were included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Performance Materials & Coatings ($15 million) and Corporate ($15 million). In 2020, the Company recognized an additional pretax impairment charge of $19 million related to capital additions made to a bio-ethanol manufacturing facility in Santa Vitoria, Minas Gerais, Brazil, which was impaired in 2017. The assets were written down to zero in 2020. The impairment charge was included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to Packaging & Specialty Plastics. On September 29, 2020, the Company divested the bio-ethanol manufacturing facility. See Note 6 for additional information. 2019 Fair Value Measurements on a Nonrecurring Basis As part of the Synergy Program, the Company has or will shut down and write-off several small manufacturing facilities, non-manufacturing assets and certain corporate facilities around the world. In 2019, manufacturing facilities associated with this plan were written down to zero. In addition, impairments of leased, non-manufacturing facilities, which were classified as Level 3 measurements, resulted in a write-down of right-of-use assets to a fair value of $152 million using unobservable inputs. The impairment charges related to the Synergy Program, totaling $143 million, were included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Industrial Intermediates & Infrastructure ($2 million), Performance Materials & Coatings ($28 million) and Corporate ($113 million). In 2019, the Company recognized an additional pretax impairment charge of $44 million related to capital additions made to Santa Vitoria, which was impaired in 2017. The assets were written down to zero in 2019. The impairment charge was included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to Packaging & Specialty Plastics. In 2019, the Company recognized impairment charges of $14 million related to non-manufacturing assets. The assets, classified as Level 3 measurements, were valued at $10 million using unobservable inputs. The impairment charges were included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Performance Materials & Coatings ($9 million) and Corporate ($5 million). In 2019, the Company recognized an impairment charge of $75 million resulting from the planned divestiture of its acetone derivatives business to ALTIVIA Ketones & Additives, LLC. The transaction closed on November 1, 2019 and included the Company's acetone derivatives related inventory and production assets, located in Institute, West Virginia, in addition to the site infrastructure, land and utilities. The assets, classified as Level 3 measurements and valued using unobservable inputs, were written down to zero in 2019, except for inventory, which was sold at the lower of cost or market. The impairment charge was included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Packaging & Specialty Plastics ($24 million) and Corporate ($51 million). In the fourth quarter of 2019, the Company performed its annual goodwill impairment testing utilizing a discounted cash flow methodology as its valuation technique. As a result, the Company determined the fair value of the C&PM reporting unit was lower than its carrying amount and recorded an impairment charge of $1,039 million, included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to Performance Materials & Coatings. See Note 13 for additional information on the impairment charge. In the fourth quarter of 2019, the Company concluded that its equity method investment in Sadara, classified as a Level 3 measurement and valued using unobservable inputs, was other-than-temporarily impaired and written down to zero. Additionally, the Company reserved certain accounts and notes receivable and accrued interest balances due to uncertainty on the timing of collection. As a result, the Company recorded a $1,755 million charge related to Sadara. The charge was included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to Packaging & Specialty Plastics ($370 million), Industrial Intermediates & Infrastructure ($1,168 million) and Corporate ($217 million). See Note 12 for additional information. 2018 Fair Value Measurements on a Nonrecurring Basis The Company has or will shut down a number of manufacturing and other non-manufacturing facilities and corporate facilities around the world as part of its restructuring programs. In 2018, the manufacturing facilities and related assets and corporate facilities associated with these programs were written down to zero. The impairment charges related to the restructuring programs, totaling $33 million, were included in "Restructuring, goodwill impairment and asset related charges - net" in the consolidated statements of income and related to Packaging & Specialty Plastics ($10 million), Performance Materials & Coatings ($7 million) and Corporate ($16 million). In 2018, the Company recognized an additional pretax impairment charge of $34 million related primarily to capital additions made to Santa Vitoria, which was impaired in 2017. The assets were written down to zero in 2018. The impairment charge was included in “Restructuring, goodwill impairment and asset related charges - net” in the consolidated statements of income and related to the Packaging & Specialty Plastics segment. See Note 6 for additional information on the Company's restructuring activities.

VARIABLE INTEREST ENTITIES

VARIABLE INTEREST ENTITIES	12 Months Ended
	Dec. 31, 2020
VARIABLE INTEREST ENTITIES [Abstract]
VARIABLE INTEREST ENTITIES	VARIABLE INTEREST ENTITIES Consolidated Variable Interest Entities ("VIEs") The Company holds a variable interest in the following joint ventures or entities for which it is the primary beneficiary: Asia Pacific Joint Ventures The Company has variable interests in two joint ventures that own and operate manufacturing and logistics facilities, which produce chemicals and provide services in Asia Pacific. The Company's variable interests in these joint ventures relate to arrangements between the joint ventures and the Company, involving the majority of the output on take-or-pay terms with pricing ensuring a guaranteed return to the joint ventures. The Company was a 50 percent indirect owner in a propylene oxide ("PO") manufacturing joint venture in Asia Pacific. The Company had a variable interest in this joint venture relating to arrangements between the joint venture and the Company involving the majority of the output on take-or-pay terms, with pricing ensuring a guaranteed return to the joint venture. On April 30, 2019, the Company executed an agreement to acquire full ownership in the PO manufacturing joint venture. The transaction closed on October 1, 2019, for a cash purchase price of $331 million. Approximately half of the purchase price was attributed to the Company’s proportionate equity interest in the entity that owned the PO manufacturing joint venture, which is accounted for under the equity method of accounting, and was classified as "Investments in and loans to nonconsolidated affiliates" in the consolidated statements of cash flows. The remaining $166 million was classified as "Purchases of noncontrolling interests" in the consolidated statements of cash flows. Ethylene Storage Joint Venture The Company has variable interests in a joint venture that provides ethylene storage in Alberta, Canada. The Company's variable interests relate to arrangements involving a majority of the joint venture's storage capacity on take-or-pay terms with pricing ensuring a guaranteed return to the joint venture; and favorably priced leases provided to the joint venture. The Company provides the joint venture with operation and maintenance services and utilities. Cogeneration in Brazil The Company held variable interests in a cogeneration facility in Brazil that provided power to the Company's bio-ethanol manufacturing facility. The Company's variable interests were the result of a tolling arrangement where it provided fuel to the entity and purchased a majority of the cogeneration facility’s output on terms that ensured a return to the entity’s equity holders. On September 29, 2020, the Company divested its bio-ethanol manufacturing facility and is no longer a party to the tolling arrangement with the cogeneration facility. Assets and Liabilities of Consolidated VIEs The Company's consolidated financial statements include the assets, liabilities and results of operations of VIEs for which the Company is the primary beneficiary. The other equity holders’ interests are reflected in "Net income attributable to noncontrolling interests" in the consolidated statements of income and "Noncontrolling interests" in the consolidated balance sheets. The following table summarizes the carrying amounts of these entities’ assets and liabilities included in the Company’s consolidated balance sheets at December 31, 2020 and 2019: Assets and Liabilities of Consolidated VIEs at Dec 31 In millions 2020 2019 Cash and cash equivalents $ 26 $ 37 Other current assets 44 51 Net property 232 330 Other noncurrent assets 17 18 Total assets 1 $ 319 $ 436 Current liabilities $ 73 $ 141 Long-term debt 6 34 Other noncurrent obligations 18 21 Total liabilities 2 $ 97 $ 196 1. All assets were restricted at December 31, 2020 and 2019. 2. All liabilities were nonrecourse at December 31, 2020 and 2019. Amounts presented in the consolidated balance sheets and the table above as restricted assets or nonrecourse obligations relating to consolidated VIEs at December 31, 2020 and 2019 are adjusted for intercompany eliminations. Nonconsolidated VIEs The Company holds a variable interest in the following entities for which the Company is not the primary beneficiary: Silicon Joint Ventures The Company holds minority voting interests in certain joint ventures that produce silicon inputs for the Company. These joint ventures operate under supply agreements that sell inventory to the equity owners using pricing mechanisms that guarantee a return, therefore shielding the joint ventures from the obligation to absorb expected losses. As a result of the pricing mechanisms of these agreements, these entities are determined to be VIEs. The Company is not the primary beneficiary, as it does not hold the power to direct the activities that most significantly impact the economic performance of these entities; therefore, the entities are accounted for under the equity method of accounting. The Company's maximum exposure to loss as a result of its involvement with these variable interest entities is determined to be the carrying value of the investment in these entities. At December 31, 2020, the Company's investment in these joint ventures was $107 million ($100 million at December 31, 2019), classified as "Investment in nonconsolidated affiliates" in the consolidated balance sheets, representing the Company's maximum exposure to loss.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS Effective with the separation from DowDuPont on April 1, 2019, TDCC became a wholly owned subsidiary of Dow Inc. and reported transactions with Dow Inc. as related party transactions. From the Merger Date through March 31, 2019, TDCC reported transactions with DowDuPont and Historical DuPont and its affiliates as related party transactions. TDCC TDCC has committed to fund Dow Inc.'s dividends paid to common stockholders and share repurchases, as approved by Dow Inc.'s Board from time to time, as well as certain governance expenses. Funding is accomplished through intercompany loans. TDCC's Board reviews and determines a dividend distribution to Dow Inc. to settle the intercompany loans. In 2020 and 2019, TDCC declared and paid dividends to Dow Inc. of $2,233 million and $201 million, respectively. At December 31, 2020 and 2019, TDCC's intercompany loan balance with Dow Inc. was insignificant. DowDuPont Pursuant to the Agreement and Plan of Merger, dated as of December 11, 2015, as amended on March 31, 2017, and prior to the separation from DowDuPont, TDCC committed to fund a portion of DowDuPont's dividends paid to common stockholders and certain governance expenses. In addition, share repurchases by DowDuPont were partially funded by TDCC through 2018. In 2019, TDCC declared and paid dividends to DowDuPont of $535 million ($3,711 million in 2018). Historical DuPont and its Affiliates Prior to the separation from DowDuPont, TDCC sold to and procured from Historical DuPont and its affiliates certain raw materials that were consumed in each company's manufacturing process. The following table presents revenue earned and expenses incurred related to transactions with Historical DuPont and its affiliates: Sales to Historical DuPont and its Affiliates 2019 2018 In millions Net sales $ 12 $ 55 Cost of sales $ 9 $ 42 Purchases from Historical DuPont and its affiliates were insignificant for 2019 and 2018.

SEGMENTS AND GEOGRAPHIC REGIONS

SEGMENTS AND GEOGRAPHIC REGIONS	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segments and Geographic Regions [Text Block]	SEGMENTS AND GEOGRAPHIC REGIONS Dow combines global breadth, asset integration and scale, focused innovation and leading business positions to achieve profitable growth. The Company's ambition is to become the most innovative, customer centric, inclusive and sustainable materials science company, with a purpose to deliver a sustainable future for the world through our materials science expertise and collaboration with our partners. Dow’s portfolio of plastics, industrial intermediates, coatings and silicones businesses delivers a broad range of differentiated science-based products and solutions for its customers in high-growth market segments, such as packaging, infrastructure, mobility and consumer care. Dow operates 106 manufacturing sites in 31 countries and employs approximately 35,700 people. The Company conducts its worldwide operations through six global businesses which are organized into the following operating segments: Packaging & Specialty Plastics, Industrial Intermediates & Infrastructure and Performance Materials & Coatings. Corporate contains the reconciliation between the totals for the operating segments and the Company's totals. The Company did not aggregate any operating segments when determining its reportable segments. The Company reports geographic information for the following regions: U.S. & Canada, Asia Pacific, Latin America and EMEAI. The Company transfers ethylene to its downstream derivative businesses at market prices. The Company also allocated costs previously assigned to AgCo and SpecCo ("stranded costs") to the operating segments. Dow’s measure of profit/loss for segment reporting purposes is Operating EBIT (for the year ended December 31, 2020) and pro forma Operating EBIT (for the years ended December 31, 2019 and 2018) as this is the manner in which the Company's chief operating decision maker ("CODM") assesses performance and allocates resources. The Company defines Operating EBIT as earnings (i.e., "Income (loss) from continuing operations before income taxes") before interest, excluding the impact of significant items. The Company defines pro forma Operating EBIT as earnings (i.e., "Income (loss) from continuing operations before income taxes") before interest, plus pro forma adjustments, excluding the impact of significant items. Operating EBIT and pro forma Operating EBIT by segment include all operating items relating to the businesses; items that principally apply to Dow as a whole are assigned to Corporate. The Company also presents pro forma net sales for the years ended December 31, 2019 and 2018 in this footnote as it is included in management's measure of segment performance and is regularly reviewed by the CODM. Pro forma net sales includes the impact of various manufacturing, supply and service related agreements entered into with DuPont and Corteva in connection with the separation which provide for different pricing than the historical intercompany and intracompany pricing practices of TDCC and Historical DuPont. Corporate Profile Dow conducts its worldwide operations through global businesses which are reflected in the following reportable segments: Packaging & Specialty Plastics Packaging & Specialty Plastics consists of two highly integrated global businesses: Hydrocarbons & Energy and Packaging and Specialty Plastics. The segment employs the industry’s broadest polyolefin product portfolio, supported by the Company’s proprietary catalyst and manufacturing process technologies, to work at the customer’s design table throughout the value chain to deliver more reliable and durable, higher performing, and more sustainable plastics to customers in food and specialty packaging; industrial and consumer packaging; health and hygiene; caps, closures and pipe applications; consumer durables; mobility and transportation; and infrastructure. This segment includes the results of The Kuwait Styrene Company K.S.C.C. and The SCG-Dow Group, as well as a portion of the results of EQUATE, The Kuwait Olefins Company K.S.C.C. ("TKOC"), Map Ta Phut and Sadara, all joint ventures of the Company. Industrial Intermediates & Infrastructure Industrial Intermediates & Infrastructure consists of two customer-centric global businesses - Industrial Solutions and Polyurethanes & Construction Chemicals - that develop important intermediate chemicals that are essential to manufacturing processes, as well as downstream, customized materials and formulations that use advanced development technologies. These businesses primarily produce and market ethylene oxide and propylene oxide derivatives that are aligned to market segments as diverse as appliances, coatings, electronics, surfactants for cleaning and sanitization, infrastructure and oil and gas. The global scale and reach of these businesses, world-class technology and R&D capabilities and materials science expertise enable the Company to be a premier solutions provider offering customers value-add sustainable solutions to enhance comfort, energy efficiency, product effectiveness and durability across a wide range of home comfort and appliances, building and construction, adhesives and lubricant applications, among others. This segment includes a portion of the Company's share of the results of EQUATE, TKOC, Map Ta Phut and Sadara. Performance Materials & Coatings Performance Materials & Coatings includes industry-leading franchises that deliver a wide array of solutions into consumer and infrastructure end-markets. The segment consists of two global businesses: Coatings & Performance Monomers and Consumer Solutions. These businesses primarily utilize the Company's acrylics-, cellulosics- and silicone-based technology platforms to serve the needs of the architectural and industrial coatings; home care and personal care; consumer and electronics; mobility and transportation; industrial and chemical processing; and building and infrastructure end-markets. Both businesses employ materials science capabilities, global reach and unique products and technology to combine chemistry platforms to deliver differentiated offerings to customers. Corporate Corporate includes certain enterprise and governance activities (including insurance operations, environmental operations, etc.); non-business aligned joint ventures; non-business aligned litigation expenses; and discontinued or non-aligned businesses. Sales are attributed to geographic region based on customer location; long-lived assets are attributed to geographic region based on asset location. Geographic Region Information United EMEAI Rest of Total In millions 2020 Sales to external customers $ 12,547 $ 12,969 $ 13,026 $ 38,542 Long-lived assets $ 13,833 $ 2,813 $ 3,593 $ 20,239 2019 Sales to external customers $ 14,437 $ 14,612 $ 13,902 $ 42,951 Long-lived assets $ 14,571 $ 2,649 $ 3,776 $ 20,996 2018 Sales to external customers $ 16,613 $ 17,406 $ 15,585 $ 49,604 Long-lived assets $ 14,750 $ 2,657 $ 4,011 $ 21,418 Segment Information Pack. & Spec. Plastics Ind. Interm. & Infrast. Perf. Materials & Coatings Corp. Total In millions 2020 Net sales $ 18,301 $ 12,021 $ 7,951 $ 269 $ 38,542 Restructuring and asset related charges - net 1 30 22 192 464 708 Equity in earnings (losses) of nonconsolidated affiliates 173 (166) 6 (31) (18) Operating EBIT 2 2,325 355 314 (279) 2,715 Depreciation and amortization 1,372 605 870 27 2,874 Total assets 30,069 12,220 13,915 5,266 61,470 Investments in nonconsolidated affiliates 661 531 108 27 1,327 Capital expenditures 678 268 306 — 1,252 2019 Net sales $ 20,245 $ 13,440 $ 8,923 $ 343 $ 42,951 Pro forma net sales 20,245 13,449 8,961 343 42,998 Restructuring, goodwill impairment and asset related charges - net 1 439 1,175 1,076 529 3,219 Equity in earnings (losses) of nonconsolidated affiliates 162 (241) 5 (20) (94) Pro forma Operating EBIT 3 2,904 845 918 (315) 4,352 Depreciation and amortization 1,435 594 877 32 2,938 Total assets 29,522 11,753 14,059 5,190 60,524 Investments in nonconsolidated affiliates 675 568 101 60 1,404 Capital expenditures 1,039 452 470 — 1,961 2018 Net sales $ 24,195 $ 15,447 $ 9,677 $ 285 $ 49,604 Pro forma net sales 24,237 15,465 9,865 285 49,852 Restructuring, goodwill impairment and asset related charges - net 1 46 11 21 143 221 Equity in earnings (losses) of nonconsolidated affiliates 287 284 4 (20) 555 Pro forma Operating EBIT 3 3,593 1,767 1,246 (370) 6,236 Depreciation and amortization 1,385 607 888 29 2,909 Total assets 4 30,279 14,092 16,050 3,378 63,799 Investments in nonconsolidated affiliates 1,278 1,850 99 93 3,320 Capital expenditures 1,231 433 427 — 2,091 1. See Note 6 for information regarding the Company's restructuring programs, goodwill impairment and other asset related charges. 2. Operating EBIT for TDCC in 2020 is substantially the same as that of Dow Inc. and therefore is not disclosed separately in the table above. A reconciliation of "Income from continuing operations, net of tax" to Operating EBIT is provided on the following page. 3. Pro forma Operating EBIT for TDCC in 2019 is substantially the same as that of Dow Inc. (same for 2018) and therefore is not disclosed separately in the table above. A reconciliation of "Income (loss) from continuing operations, net of tax" to pro forma Operating EBIT is provided on the following page. 4. Excludes assets of discontinued operations of $19,900 million. Reconciliation of "Income from continuing operations, net of tax" to Operating EBIT 2020 In millions Income from continuing operations, net of tax $ 1,294 + Provision for income taxes on continuing operations 777 Income from continuing operations before income taxes $ 2,071 - Interest income 38 + Interest expense and amortization of debt discount 827 - Significant items 145 Operating EBIT $ 2,715 Reconciliation of "Income (loss) from continuing operations, net of tax" to Pro Forma Operating EBIT 2019 2018 In millions Income (loss) from continuing operations, net of tax $ (1,717) $ 2,940 + Provision for income taxes on continuing operations 470 809 Income (loss) from continuing operations before income taxes $ (1,247) $ 3,749 - Interest income 81 82 + Interest expense and amortization of debt discount 933 1,063 + Pro forma adjustments 1 65 180 - Significant items (4,682) (1,326) Pro forma Operating EBIT $ 4,352 $ 6,236 1. Pro forma adjustments include: (1) the margin impact of various manufacturing, supply and service related agreements entered into with DuPont and Corteva in connection with the separation which provide for different pricing than the historical intercompany and intracompany pricing practices of TDCC and Historical DuPont (included for 2019 and 2018 only), (2) the removal of the amortization of ECP's inventory step-up recognized in connection with the Merger and (3) the elimination of the impact of events directly attributable to the Merger, internal reorganization and business realignment, separation, distribution and other related transactions (e.g., one-time transaction costs). The following tables summarize the pretax impact of significant items by segment that are excluded from Operating EBIT and pro forma Operating EBIT: Significant Items by Segment for 2020 Pack. & Spec. Plastics Ind. Interm. & Infrast. Perf. Materials & Coatings Corp. Total In millions Integration and separation costs 1 $ — $ — $ — $ (239) $ (239) Restructuring and asset related charges - net 2 (30) (22) (192) (464) (708) Warranty accrual adjustment of exited business 3 — — — 11 11 Restructuring implementation costs 4 — — — (10) (10) Net gain on divestitures and asset sale 5 52 61 — 604 717 Litigation related charges, awards and adjustments 6 544 — — — 544 Loss on early extinguishment of debt 7 — — — (149) (149) Indemnification and other transaction related costs 8 — — — (21) (21) Total $ 566 $ 39 $ (192) $ (268) $ 145 1. Costs related to business separation activities. 2. Includes Board approved restructuring plans and asset-related charges, which include other asset impairments. See Note 6 for additional information. 3. Includes an adjustment to the warranty accrual of an exited business. 4. Includes costs associated with implementing the Company's 2020 Restructuring Program. 5. Primarily related to a gain on the sale of rail infrastructure in the U.S. and Canada and a gain on the sale of marine and terminal operations and assets in the U.S. See Notes 5 and 7 for additional information. 6. Includes recognition of gains associated with a legal matter with Nova. See Note 16 for additional information. 7. The Company retired outstanding long-term debt resulting in a loss on early extinguishment. See Note 15 for additional information. 8. Primarily related to charges associated with agreements entered into with DuPont and Corteva as part of the separation and distribution which, among other matters, provides for cross-indemnities and allocations of obligations and liabilities for periods prior to, at and after the completion of the separation. Significant Items by Segment for 2019 Pack. & Spec. Plastics Ind. Interm. & Infrast. Perf. Materials & Coatings Corp. Total In millions Integration and separation costs 1 $ — $ — $ — $ (1,013) $ (1,013) Restructuring, goodwill impairment and asset related charges - net 2 (439) (1,175) (1,076) (529) (3,219) Warranty accrual adjustment of exited business 3 — — — 39 39 Environmental charges 4 (5) (8) (50) (336) (399) Loss on divestitures 5 — (5) — (44) (49) Loss on early extinguishment of debt 6 — — — (102) (102) Litigation related charges, awards and adjustments 7 170 — — 35 205 Indemnification and other transaction related costs 8 — — — (144) (144) Total $ (274) $ (1,188) $ (1,126) $ (2,094) $ (4,682) 1. Costs related to post-Merger integration and business separation activities. Excludes one-time transaction costs directly attributable to the Merger. 2. Includes Board approved restructuring plans and asset related charges (see Note 6 for additional information); a charge related to Sadara (see Note 12 for additional information) and an impairment charge related to goodwill associated with the Coatings & Performance Monomers reporting unit (see Note 13 for additional information). 3. Includes an adjustment to the warranty accrual of an exited business. 4. Related to environmental remediation, primarily resulting from the culmination of long-standing negotiations with regulators and/or agencies and review of additional costs to manage ongoing remediation activities resulting from Dow’s separation from DowDuPont and related agreements with Corteva and DuPont. See Note 16 for additional information. 5. Includes post-closing adjustments on previous divestitures. 6. The Company retired outstanding long-term debt resulting in a loss on early extinguishment. See Note 15 for additional information. 7. Includes a gain associated with a legal matter with Nova, as well as a gain related to an adjustment of the Implant Liability and a charge related to the settlement of the Commercial Creditor matters. See Note 16 for additional information. 8. Includes charges primarily associated with agreements entered into with DuPont and Corteva as part of the separation and distribution which, among other matters, provides for cross-indemnities and allocations of obligations and liabilities for periods prior to, at and after the completion of the separation. Significant Items by Segment for 2018 Pack. & Spec. Plastics Ind. Interm. & Infrast. Perf. Materials & Coatings Corp. Total In millions Impact of Dow Silicones ownership restructure 1 $ — $ — $ (20) $ — $ (20) Integration and separation costs 2 — — — (1,074) (1,074) Restructuring and asset related charges - net 3 (46) (11) (21) (120) (198) Gain on divestiture 4 — 20 — — 20 Loss on early extinguishment of debt 5 — — — (54) (54) Total $ (46) $ 9 $ (41) $ (1,248) $ (1,326) 1. Includes a loss related to a post-closing adjustment related to the Dow Silicones ownership restructure. 2. Costs related to post-Merger integration and separation and distribution activities, and costs related to the Dow Silicones ownership restructure. 3. Includes Board approved restructuring plans and asset-related charges, which include other asset impairments. See Note 6 for additional information. 4. Includes a gain related to the Company's sale of its equity interest in MEGlobal. 5. The Company retired outstanding notes payable resulting in a loss on early extinguishment. See Note 15 for additional information.

SELECTED QUARTERLY FINANCIAL DA

SELECTED QUARTERLY FINANCIAL DATA	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
SELECTED QUARTERLY FINANCIAL DATA	SELECTED QUARTERLY FINANCIAL DATA 2020 In millions, except per share amounts (Unaudited) 1st 2nd 3rd 4th Year Dow Inc. Net sales $ 9,770 $ 8,354 $ 9,712 $ 10,706 $ 38,542 Cost of sales $ 8,230 $ 7,610 $ 8,371 $ 9,135 $ 33,346 Gross margin $ 1,540 $ 744 $ 1,341 $ 1,571 $ 5,196 Restructuring and asset related charges (credits) - net 1 $ 96 $ 6 $ 617 $ (11) $ 708 Integration and separation costs 2 $ 65 $ 46 $ 63 $ 65 $ 239 Net income (loss) 3 $ 258 $ (217) $ (1) $ 1,254 $ 1,294 Net income (loss) attributable to Dow Inc. $ 239 $ (225) $ (25) $ 1,236 $ 1,225 Earnings (loss) per common share from continuing operations - basic 4 $ 0.32 $ (0.31) $ (0.04) $ 1.66 $ 1.64 Earnings (loss) per common share from continuing operations - diluted 4 $ 0.32 $ (0.31) $ (0.04) $ 1.65 $ 1.64 Dividends declared per share of common stock $ 0.70 $ 0.70 $ 0.70 $ 0.70 $ 2.80 Market price range of common stock: High $ 53.75 $ 45.90 $ 51.07 $ 57.73 $ 57.73 Low $ 22.00 $ 27.04 $ 39.44 $ 45.18 $ 22.00 TDCC Net sales $ 9,770 $ 8,354 $ 9,712 $ 10,706 $ 38,542 Cost of sales $ 8,230 $ 7,608 $ 8,371 $ 9,134 $ 33,343 Gross margin $ 1,540 $ 746 $ 1,341 $ 1,572 $ 5,199 Restructuring and asset related charges (credits) - net 1 $ 96 $ 6 $ 617 $ (11) $ 708 Integration and separation costs 2 $ 65 $ 46 $ 63 $ 65 $ 239 Net income (loss) 3 $ 258 $ (217) $ (1) $ 1,264 $ 1,304 Net income (loss) attributable to The Dow Chemical Company $ 239 $ (225) $ (25) $ 1,246 $ 1,235 1. See Note 6 for additional information. 2. See Note 3 for additional information. 3. See Notes 5, 7, 15 and 16 for information on additional items materially impacting "Net income (loss)." The fourth quarter of 2020 includes a gain related to the sale of marine and terminal operations and assets and a gain associated with a legal matter with Nova. The third quarter of 2020 includes a gain related to the sale of rail infrastructure operations and assets and a loss on the early extinguishment of debt. The first quarter of 2020 includes a loss on the early extinguishment of debt. 4. Earnings per common share amounts relate only to Dow Inc. as TDCC common shares are not publicly traded and are all owned by Dow Inc. Due to quarterly changes in the share count and the allocation of income to participating securities, the sum of the four quarters does not equal the earnings per share amount calculated for the year. 2019 In millions, except per share amounts (Unaudited) 1st 2nd 3rd 4th Year Dow Inc. Net sales $ 10,969 $ 11,014 $ 10,764 $ 10,204 $ 42,951 Cost of sales $ 9,142 $ 9,420 $ 9,377 $ 8,718 $ 36,657 Gross margin $ 1,827 $ 1,594 $ 1,387 $ 1,486 $ 6,294 Restructuring, goodwill impairment and asset related charges - net 1 $ 156 $ 65 $ 147 $ 2,851 $ 3,219 Integration and separation costs 2 $ 452 $ 348 $ 164 $ 99 $ 1,063 Income (loss) from continuing operations, net of tax $ 156 $ 90 $ 347 $ (2,310) $ (1,717) Income from discontinued operations net of tax $ 445 $ — $ — $ — $ 445 Net income (loss) 3 $ 601 $ 90 $ 347 $ (2,310) $ (1,272) Net income (loss) attributable to Dow Inc. $ 556 $ 75 $ 333 $ (2,323) $ (1,359) Earnings (loss) per common share from continuing operations - basic 4 $ 0.16 $ 0.10 $ 0.45 $ (3.14) $ (2.42) Earnings (loss) per common share from continuing operations - diluted 4 $ 0.16 $ 0.10 $ 0.45 $ (3.14) $ (2.42) Dividends declared per share of common stock 5 N/A $ 0.70 $ 0.70 $ 0.70 $ 2.10 Market price range of common stock: High 5 N/A $ 59.71 $ 52.79 $ 55.99 $ 59.71 Low 5 N/A $ 46.76 $ 40.71 $ 43.85 $ 40.71 TDCC Net sales $ 10,969 $ 11,014 $ 10,764 $ 10,204 $ 42,951 Cost of sales $ 9,142 $ 9,419 $ 9,377 $ 8,719 $ 36,657 Gross margin $ 1,827 $ 1,595 $ 1,387 $ 1,485 $ 6,294 Restructuring, goodwill impairment and asset related charges - net 1 $ 156 $ 65 $ 147 $ 2,851 $ 3,219 Integration and separation costs 2 $ 452 $ 324 $ 164 $ 99 $ 1,039 Income (loss) from continuing operations, net of tax $ 156 $ 217 $ 324 $ (2,292) $ (1,595) Income from discontinued operations net of tax $ 445 $ — $ — $ — $ 445 Net income (loss) 3 $ 601 $ 217 $ 324 $ (2,292) $ (1,150) Net income (loss) attributable to The Dow Chemical Company $ 556 $ 202 $ 310 $ (2,305) $ (1,237) 1. See Note 6 for additional information. 2. See Note 3 for additional information. 3. See Notes 3, 8, 15 and 16 for information on additional items materially impacting "Net income (loss)." The fourth quarter of 2019 included a gain related to the effects of Swiss tax reform and a loss on the early extinguishment of debt. The third quarter of 2019 included a charge related to environmental remediation, a charge related to the settlement of the Commercial Creditor matters, a gain related to an adjustment to the Implant Liability and a gain associated with a legal matter with Nova. The second quarter of 2019 included charges associated with agreements entered into with DuPont and Corteva as part of the separation from DowDuPont. 4. Earnings per common share amounts relate only to Dow Inc. as TDCC common shares are not publicly traded and are all owned by Dow Inc. Due to quarterly changes in the share count and the allocation of income to participating securities, the sum of the four quarters does not equal the earnings per share amount calculated for the year. 5. Dow Inc.'s common stock was solely owned by DowDuPont through March 31, 2019, and on April 1, 2019, Dow Inc. became an independent, publicly traded company.

VALUATION AND QUALIFYING ACCOUN

VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
VALUATION AND QUALIFYING ACCOUNTINGS	(In millions) For the years ended Dec 31, 2020 2019 2018 Accounts Receivable - Allowance for Doubtful Receivables Balance at beginning of year $ 45 $ 42 $ 59 Additions charged to expenses 1 22 24 10 Additions charged to other accounts 2 — — 4 Deductions from reserves 3 (16) (21) (31) Balance at end of year $ 51 $ 45 $ 42 Inventory - Obsolescence Reserve Balance at beginning of year $ 35 $ 23 $ 18 Additions charged to expenses 2 19 7 Deductions from reserves 4 (14) (7) (2) Balance at end of year $ 23 $ 35 $ 23 Reserves for Other Investments and Noncurrent Receivables Balance at beginning of year $ 2,215 $ 460 $ 430 Additions charged to expenses 1 7 1,758 44 Deductions from reserves 5 (129) (3) (14) Balance at end of year $ 2,093 $ 2,215 $ 460 Deferred Tax Assets - Valuation Allowance Balance at beginning of year $ 1,262 $ 1,225 $ 1,255 Additions charged to expenses 313 140 152 Deductions from reserves (273) (103) (182) Balance at end of year $ 1,302 $ 1,262 $ 1,225 1. In 2019, additions charged to expenses for "Accounts Receivable - Allowance for Doubtful Receivables" included $2 million and additions charged to expenses for "Reserves for Other Investments and Noncurrent Receivables" included $1,753 million related to the Company's investment in Sadara Chemical Company ("Sadara"). See Note 12 to the Consolidated Financial Statements for additional information. 2. Additions to allowance for doubtful receivables charged to other accounts were classified as "Accounts and notes receivable - Other" in the consolidated balance sheets. These reserves relate to the Company's sale of trade accounts receivable. Anticipated credit losses in the portfolio of receivables sold were used to fair value the Company's interests held in trade accounts receivable conduits. See Notes 14 and 23 to the Consolidated Financial Statements for additional information. 3. Deductions included write-offs, recoveries, currency translation adjustments and other miscellaneous items. 4. Deductions included disposals and currency translation adjustments. 5. In 2020, deductions from reserves for "Reserves for Other Investments and Noncurrent Receivables" included $77 million related to the Company's investment in Sadara. See Note 12 to the Consolidated Financial Statements for additional information.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation The accompanying consolidated financial statements of Dow Inc. and TDCC were prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the assets, liabilities, revenues and expenses of all majority-owned subsidiaries over which Dow exercises control and, when applicable, entities for which Dow has a controlling financial interest or is the primary beneficiary. Intercompany transactions and balances are eliminated in consolidation. Investments in nonconsolidated affiliates (20-50 percent owned companies or less than 20 percent owned companies over which significant influence is exercised) are accounted for using the equity method. Effective April 1, 2019, Dow Inc. owns all of the outstanding common shares of TDCC. TDCC is deemed the predecessor to Dow Inc. and the historical results of TDCC are deemed the historical results of Dow Inc. for periods prior to and including March 31, 2019. As a result of the parent/subsidiary relationship between Dow Inc. and TDCC, and considering that the financial statements and disclosures of each company are substantially similar, the companies are filing a combined report for this Annual Report on Form 10-K. The information reflected in the report is equally applicable to both Dow Inc. and TDCC, except where otherwise noted. As of the effective date and time of the distribution, DowDuPont no longer beneficially owned any equity interest in Dow and no longer consolidated Dow and its consolidated subsidiaries into its financial results. The consolidated financial results of Dow for all periods presented reflect the distribution of TDCC’s agricultural sciences business (“AgCo”) and specialty products business (“SpecCo”) as discontinued operations, as well as the receipt of Historical DuPont’s ethylene and ethylene copolymers businesses (other than its ethylene acrylic elastomers business) (“ECP”) as a common control transaction from the closing of the Merger on August 31, 2017 ("Merger Date"). See Note 3 for additional information. The Company conducts its worldwide operations through six global businesses which are organized into the following operating segments: Packaging & Specialty Plastics, Industrial Intermediates & Infrastructure and Performance Materials & Coatings. Corporate contains the reconciliation between the totals for the operating segments and the Company's totals. See Note 26 for additional information. From the Merger Date through the separation, transactions between DowDuPont, TDCC and Historical DuPont and their affiliates were treated as related party transactions. Transactions between TDCC and Historical DuPont primarily consisted of the sale and procurement of certain raw materials that were consumed in each company's manufacturing process. Transactions between TDCC and Dow Inc. are treated as related party transactions for TDCC. See Note 25 for additional information. Throughout this Annual Report on Form 10-K, unless otherwise indicated, amounts and activity are presented on a continuing operations basis. Except as otherwise indicated by the context, the term "Union Carbide" means Union Carbide Corporation, a wholly owned subsidiary of the Company, and "Dow Silicones" means Dow Silicones Corporation, a wholly owned subsidiary of the Company.
Use of Estimates in Financial Statement Preparation	Use of Estimates in Financial Statement Preparation The preparation of financial statements in accordance with U.S. GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. The Company’s consolidated financial statements include amounts that are based on management’s best estimates and judgments. Actual results could differ from those estimates.
Asbestos-Related Matters	Asbestos-Related Matters Accruals for asbestos-related matters, including defense and processing costs, are recorded based on an analysis of claim and resolution activity, defense spending, and pending and future claims. These accruals are assessed at each balance sheet date to determine if the asbestos-related liability remains appropriate. Accruals for asbestos-related matters are included in the consolidated balance sheets in “Accrued and other current liabilities” and “Asbestos-related liabilities - noncurrent.” See Note 16 for additional information.
Legal Costs	Legal Costs
Foreign Currency Translation	Foreign Currency TranslationThe local currency has been primarily used as the functional currency throughout the world. Translation gains and losses of those operations that use local currency as the functional currency are included in the consolidated balance sheets in "Accumulated other comprehensive loss" ("AOCL"). For certain subsidiaries, the U.S. dollar is used as the functional currency. This occurs when the subsidiary operates in an economic environment where the products produced and sold are tied to U.S. dollar-denominated markets, or when the foreign subsidiary operates in a hyper-inflationary environment. Where the U.S. dollar is used as the functional currency, foreign currency translation gains and losses are reflected in income.
Environmental Matters	Environmental Matters Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on current law and existing technologies. These accruals are adjusted periodically as assessment and remediation efforts progress or as additional technical or legal information becomes available. Accruals for environmental liabilities are included in the consolidated balance sheets in “Accrued and other current liabilities” and “Other noncurrent obligations” at undiscounted amounts. Accruals for related insurance or other third-party recoveries for environmental liabilities are recorded when it is probable that a recovery will be realized and are included in the consolidated balance sheets in “Accounts and notes receivable - Other” or "Noncurrent receivables." Environmental costs are capitalized if the costs extend the life of the property, increase its capacity and/or mitigate or prevent contamination from future operations. Environmental costs are also capitalized in recognition of legal asset retirement obligations resulting from the acquisition, construction and/or normal operation of a long-lived asset. Costs related to environmental contamination treatment and cleanup are charged to expense. Estimated future incremental operations, maintenance and management costs directly related to remediation are accrued when such costs are probable and reasonably estimable.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include time deposits and investments with maturities of three months or less at the time of purchase.
Financial Instruments	Financial Instruments The Company calculates the fair value of financial instruments using quoted market prices when available. When quoted market prices are not available for financial instruments, the Company uses standard pricing models with market-based inputs that take into account the present value of estimated future cash flows. The Company utilizes derivatives to manage exposures to foreign currency exchange rates, commodity prices and interest rate risk. The fair values of all derivatives are recognized as assets or liabilities at the balance sheet date. Changes in the fair values of these instruments are reported in income or AOCL, depending on the use of the derivative and whether the Company has elected hedge accounting treatment. Gains and losses on derivatives that are designated and qualify as cash flow hedging instruments are recorded in AOCL until the underlying transactions are recognized in income. Gains and losses on derivative and non-derivative instruments used as hedges of the Company’s net investment in foreign operations are recorded in AOCL as part of the cumulative translation adjustment. Gains and losses on derivatives designated and qualifying as fair value hedging instruments, as well as the offsetting losses and gains on the hedged items, are reported in income in the same accounting period. Derivatives not designated as hedging instruments are marked-to-market at the end of each accounting period with the results included in income.
Inventories	Inventories Inventories are stated at the lower of cost or net realizable value. The method of determining cost for each subsidiary varies among last-in, first-out (“LIFO”); first-in, first-out (“FIFO”); and average cost, and is used consistently from year to year. At December 31, 2020, approximately 30 percent, 58 percent and 12 percent of the Company's inventories were accounted for under the LIFO, FIFO and average cost methods, respectively. At December 31, 2019, approximately 32 percent, 58 percent and 10 percent of the Company's inventories were accounted for under the LIFO, FIFO and average cost methods, respectively. The Company routinely exchanges and swaps raw materials and finished goods with other companies to reduce delivery time, freight and other transportation costs. These transactions are treated as non-monetary exchanges and are valued at cost.
Property	PropertyLand, buildings and equipment are carried at cost less accumulated depreciation or amortization. Property under finance lease agreements is carried at the present value of lease payments over the lease term less accumulated amortization. Depreciation is based on the estimated service lives of depreciable assets and is calculated using the straight-line method. Fully depreciated assets are retained in property and accumulated depreciation accounts until they are removed from service. In the case of disposals, assets and related accumulated depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in income.
Impairment and Disposal of Long-Lived Assets	Impairment and Disposal of Long-Lived Assets The Company evaluates long-lived assets and certain identifiable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When undiscounted future cash flows are not expected to be sufficient to recover an asset’s carrying amount, the asset is written down to its fair value based on bids received from third parties or a discounted cash flow analysis based on market participant assumptions. Long-lived assets to be disposed of by sale, if material, are classified as held for sale and reported at the lower of carrying amount or fair value less cost to sell, and depreciation is ceased. Long-lived assets to be disposed of other than by sale are classified as held and used until they are disposed of and reported at the lower of carrying amount or fair value, and depreciation is recognized over the remaining useful life of the assets.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company records goodwill when the purchase price of a business combination exceeds the estimated fair value of net identified tangible and intangible assets acquired. Goodwill is tested for impairment at the reporting unit level annually in the fourth quarter, or more frequently when events or changes in circumstances indicate that the fair value of a reporting unit has more likely than not declined below its carrying value. When testing goodwill for impairment, the Company may first assess qualitative factors. If an initial qualitative assessment identifies that it is more likely than not that the fair value of a reporting unit is less than its carrying value, additional quantitative testing is performed. The Company may also elect to skip the qualitative testing and proceed directly to the quantitative testing. If the quantitative testing indicates that goodwill is impaired, an impairment charge is recognized based on the difference between the reporting unit's carrying value and its fair value. The Company primarily utilizes a discounted cash flow methodology to calculate the fair value of its reporting units. Finite-lived intangible assets such as developed technology, customer-related, trademarks, tradenames and software, are amortized over their estimated useful lives, generally on a straight-line basis for periods ranging primarily from 3 to 20 years. Indefinite-lived intangible assets are reviewed for impairment or obsolescence annually, or more frequently when events or changes in circumstances indicate that the carrying amount of an intangible asset may not be recoverable. If impaired, intangible assets are written down to fair value based on discounted cash flows.
Asset Retirement Obligations	Asset Retirement ObligationsThe Company records asset retirement obligations as incurred and reasonably estimable, including obligations for which the timing and/or method of settlement are conditional on a future event that may or may not be within the control of the Company. The fair values of obligations are recorded as liabilities on a discounted basis and are accreted over time for the change in present value. Costs associated with the liabilities are capitalized and amortized over the estimated remaining useful life of the asset, generally for periods of 10 years or less.
Investments	Investments Investments in debt securities, primarily held by the Company's insurance operations, are classified as trading, available-for-sale or held-to-maturity. Investments classified as trading are reported at fair value with unrealized gains and losses related to mark-to-market adjustments included in income. Those classified as available-for-sale are reported at fair value with unrealized gains and losses recorded in AOCL. Those classified as held-to-maturity are recorded at amortized cost. The cost of investments sold is determined by FIFO or specific identification. Investments in equity securities with a readily determinable fair value are reported at fair value with unrealized gains and losses related to mark-to-market adjustments included in income. Equity securities without a readily determinable fair value are accounted for at cost, adjusted for impairments and observable price changes in orderly transactions. The Company routinely reviews its investments for declines in fair value below the cost basis. When events or changes in circumstances indicate the carrying value of an asset may not be recoverable, the security is written down, establishing a new cost basis.
Lessee, Leases [Policy Text Block]	Leases The Company determines whether a contract contains a lease at contract inception. A contract contains a lease if there is an identified asset and the Company has the right to control the asset. Operating lease right-of-use (“ROU”) assets represent the Company's right to use an underlying asset for the lease term, and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Operating lease ROU assets and lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term. The Company uses the incremental borrowing rate in determining the present value of lease payments, unless the implicit rate is readily determinable. If lease terms include options to extend or terminate the lease, the ROU asset and lease liability are measured based on the reasonably certain decision. Leases with a term of 12 months or less at the commencement date are not recognized on the balance sheet and are expensed as incurred. The Company has lease agreements with lease and non-lease components, which are accounted for as a single lease component for nearly all classes of leased assets for which the Company is the lessee. Additionally, for certain equipment leases, the portfolio approach is applied to account for the operating lease ROU assets and lease liabilities. In the consolidated statements of income, lease expense for operating lease payments is recognized on a straight-line basis over the lease term. For finance leases, interest expense is recognized on the lease liability and the ROU asset is amortized over the lease term. Some leasing arrangements require variable payments that are dependent upon usage or output, or may vary for other reasons, such as insurance or tax payments. Variable lease payments are recognized as incurred and are not presented as part of the ROU asset or lease liability. See Note 17 for additional information.
Revenue	Revenue The Company recognizes revenue when its customer obtains control of promised goods or services in an amount that reflects the consideration which the Company expects to receive in exchange for those goods or services. To determine revenue recognition, the Company performs the following five steps: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract and (5) recognize revenue when (or as) the entity satisfies a performance obligation. See Note 4 for additional information.
Severance Costs	Severance Costs The Company routinely reviews its operations around the world in an effort to ensure competitiveness across its businesses and geographic regions. When the reviews result in a workforce reduction related to the shutdown of facilities or other optimization activities, severance benefits are provided to employees primarily under the Company’s ongoing benefit arrangements. These severance costs are accrued once management commits to a plan of termination and it becomes probable that employees will be entitled to benefits at amounts that can be reasonably estimated.
Integration and Separation Costs	Integration and Separation Costs The Company classifies expenses related to the Merger and separation and the ownership restructure of Dow Silicones as "Integration and separation costs" in the consolidated statements of income. Merger and separation related costs include: post-Merger integration expenses, costs incurred for the separation of AgCo and SpecCo and costs related to the integration of ECP. The Dow Silicones-related costs include integration expenses incurred after the close of the ownership restructure. Integration and separation costs primarily consist of financial adviser, information technology, legal, accounting, consulting and other professional advisory fees associated with preparation and execution of these activities. Integration and separation costs related to the Dow Silicones ownership restructure were completed as of May 31, 2018. Integration and separation costs related to the Merger and separation were completed as of December 31, 2020.
Income Taxes	Income Taxes The Company accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences of temporary differences between the carrying amounts and tax bases of assets and liabilities using enacted tax rates. The effect of a change in tax rates on deferred tax assets or liabilities is recognized in income in the period that includes the enactment date. The Company uses the portfolio approach for releasing income tax effects from AOCL. Effective with the Merger, TDCC and Historical DuPont were subsidiaries of DowDuPont. Prior to the separation, TDCC was included in DowDuPont's consolidated tax groups and related income tax returns within certain jurisdictions. The Company recorded a separate tax liability for its share of the taxable income and tax attributes and obligations on DowDuPont’s consolidated income tax returns following a formula consistent with the economic sharing of tax attributes and obligations. The Company and Historical DuPont computed the amount due to DowDuPont for their share of taxable income and tax attributes and obligations on DowDuPont’s consolidated tax return. The amounts reported as income tax payable or receivable represent the Company’s payment obligation (or refundable amount) to DowDuPont based on a theoretical tax liability calculated based on the methodologies agreed, elected or required in each combined or consolidated filing jurisdiction. Since April 1, 2019, the Company no longer has consolidated income tax return filings with Historical DuPont entities. The Company recognizes the financial statement effects of an uncertain income tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. The Company accrues for other tax contingencies when it is probable that a liability to a taxing authority has been incurred and the amount of the contingency can be reasonably estimated. The current portion of uncertain income tax positions is included in “Income taxes payable” and the long-term portion is included in “Other noncurrent obligations” in the consolidated balance sheets. Provision is made for taxes on undistributed earnings of foreign subsidiaries and related companies to the extent that such earnings are not deemed to be permanently invested.
Earnings per common share	Earnings per Common Share The calculation of earnings per common share is based on the weighted-average number of the Company's common shares outstanding for the applicable period. The calculation of diluted earnings per common share reflects the effect of all potential common shares that were outstanding during the respective periods, unless the effect of doing so is antidilutive.

SEPARATION FROM DOWDUPONT

SEPARATION FROM DOWDUPONT	12 Months Ended
	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
Schedule of income (loss) from discontinued operations	The results of operations of AgCo and SpecCo are presented as discontinued operations in the consolidated statements of income and are summarized in the following table: Results of Operations of AgCo and SpecCo 2019 1 2018 In millions Net sales $ 2,953 $ 12,187 Cost of sales 1,804 7,668 Research and development expenses 175 761 Selling, general and administrative expenses 262 1,108 Amortization of intangibles 61 249 Restructuring and asset related charges - net 78 411 Equity in earnings of nonconsolidated affiliates 28 400 Sundry income (expense) - net (18) (13) Interest income 3 26 Interest expense and amortization of debt discount 7 56 Income from discontinued operations before income taxes $ 579 $ 2,347 Provision for income taxes 134 512 Income from discontinued operations, net of tax $ 445 $ 1,835 1. Results through March 31, 2019.

REVENUE_2

REVENUE	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	Disaggregation of Revenue Dow disaggregates its revenue from contracts with customers by operating segment and business, as the Company believes it best depicts the nature, amount, timing and uncertainty of its revenue and cash flows. See details in the tables below: Net Trade Sales by Segment and Business 2020 2019 2018 In millions Hydrocarbons & Energy $ 4,271 $ 5,357 $ 7,587 Packaging and Specialty Plastics 14,030 14,888 16,608 Packaging & Specialty Plastics $ 18,301 $ 20,245 $ 24,195 Industrial Solutions $ 3,929 $ 4,310 $ 4,812 Polyurethanes & Construction Chemicals 8,080 9,117 10,615 Others 12 13 20 Industrial Intermediates & Infrastructure $ 12,021 $ 13,440 $ 15,447 Coatings & Performance Monomers $ 3,258 $ 3,517 $ 3,979 Consumer Solutions 4,693 5,406 5,698 Performance Materials & Coatings $ 7,951 $ 8,923 $ 9,677 Corporate $ 269 $ 343 $ 285 Total $ 38,542 $ 42,951 $ 49,604 Net Trade Sales by Geographic Region 2020 2019 2018 In millions U.S. & Canada $ 13,582 $ 15,549 $ 17,809 EMEAI 1 12,969 14,612 17,406 Asia Pacific 8,165 8,676 9,404 Latin America 3,826 4,114 4,985 Total $ 38,542 $ 42,951 $ 49,604 1. Europe, Middle East, Africa and India.
Contract with Customer, Asset and Liability	The following table summarizes the contract assets and liabilities at December 31, 2020 and 2019: Contract Assets and Liabilities at Dec 31 2020 2019 In millions Accounts and notes receivable - Trade $ 4,839 $ 4,844 Contract assets - current 1 $ 58 $ 41 Contract assets - noncurrent 2 $ 11 $ 4 Contract liabilities - current 3 $ 349 $ 193 Contract liabilities - noncurrent 4 $ 1,915 $ 1,607 1. Included in "Other current assets" in the consolidated balance sheets. 2. Included in "Deferred charges and other assets" in the consolidated balance sheets. 3. Included in "Accrued and other current liabilities" in the consolidated balance sheets. The increase from December 31, 2019 to December 31, 2020 was primarily due to advance payments from customers related to royalty agreements. 4. Included in "Other noncurrent obligations" in the consolidated balance sheets. The increase from December 31, 2019 to December 31, 2020 was due to an advance payment from a customer related to a long-term product supply agreement.

RESTRUCTURING, GOODWILL IMPAI_2

RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET	12 Months Ended
	Dec. 31, 2020
2020 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table summarizes the activities related to the 2020 Restructuring Program: 2020 Restructuring Program Severance and Related Benefit Costs Asset Write-downs and Write-offs Costs Associated with Exit and Disposal Activities Total In millions Packaging & Specialty Plastics $ — $ 11 $ — $ 11 Industrial Intermediates & Infrastructure — 22 — 22 Performance Materials & Coatings — 116 61 177 Corporate 297 47 19 363 Total restructuring charges $ 297 $ 196 $ 80 $ 573 Charges against the reserve — (196) (5) (201) Cash payments (8) — — (8) Reserve balance at Dec 31, 2020 $ 289 $ — $ 75 $ 364
DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table summarizes the activities related to the Synergy Program. At December 31, 2020, $21 million was included in "Accrued and other current liabilities" ($52 million at December 31, 2019) and $13 million ($19 million at December 31, 2019) was included in "Other noncurrent obligations" in the consolidated balance sheets. DowDuPont Synergy Program Severance and Related Benefit Costs Asset Write-downs and Write-offs Costs Associated with Exit and Disposal Activities Total In millions Reserve balance at Dec 31, 2017 $ 270 $ — $ 5 275 2018 restructuring charges Packaging & Specialty Plastics $ — $ 10 $ 3 $ 13 Industrial Intermediates & Infrastructure — — 11 11 Performance Materials & Coatings — 7 — 7 Corporate 137 16 — 153 Total 2018 restructuring charges $ 137 $ 33 $ 14 $ 184 Charges against the reserve — (33) — (33) Cash payments (197) — (12) (209) Reserve balance at Dec 31, 2018 $ 210 $ — $ 7 $ 217 2019 restructuring charges Packaging & Specialty Plastics $ — $ — $ 1 $ 1 Industrial Intermediates & Infrastructure — 2 5 7 Performance Materials & Coatings — 28 — 28 Corporate 123 113 20 256 Total 2019 restructuring charges $ 123 $ 143 $ 26 $ 292 Charges against the reserve — (143) — (143) Cash payments (279) — (16) (295) Reserve balance at Dec 31, 2019 $ 54 $ — $ 17 $ 71 2020 restructuring charges Corporate 90 — — 90 Total 2020 restructuring charges $ 90 $ — $ — $ 90 Charges against the reserve (4) — — (4) Cash payments (121) — (2) (123) Reserve balance at Dec 31, 2020 $ 19 $ — $ 15 $ 34

SUPPLEMENTARY INFORMATION_2

SUPPLEMENTARY INFORMATION	12 Months Ended
	Dec. 31, 2020
Supplementary Information [Abstract]
Sundry Income, Net	Sundry Income (Expense) – Net 1 Dow Inc. TDCC In millions 2020 2019 2018 2020 2019 2018 Non-operating pension and other postretirement benefit plan net credits 2 $ 103 $ 205 $ 123 $ 103 $ 205 $ 123 Foreign exchange gains (losses) (62) 91 (119) (65) 77 (119) Gain on divestiture of marine and terminal operations and assets 3 233 — — 233 — — Gain on divestiture of rail infrastructure operations and assets 3 499 — — 499 — — Loss on early extinguishment of debt 4 (149) (102) (54) (149) (102) (54) Gain (loss) on divestitures and asset sale 5 (15) (49) — (15) 2 — Gain related to Nova ethylene asset matter 6 544 170 — 544 170 — Gain on sales of other assets and investments 48 67 18 48 67 18 Dow Silicones breast implant liability adjustment 6 5 85 — 5 85 — Indemnification and other transaction related credits (costs) 7 (21) (69) — (11) 6 — Loss on Dow Silicones commercial creditor matters 6 — (50) — — (50) — Post-closing adjustments related to Dow Silicones ownership restructure — — (20) — — (20) Post-closing adjustments on divestiture of MEGlobal — — 20 — — 20 Other - net 84 113 128 82 113 128 Total sundry income (expense) – net $ 1,269 $ 461 $ 96 $ 1,274 $ 573 $ 96 1. Prior period amounts were updated to conform with the current year presentation. 2. See Note 20 for additional information. 3. See Note 5 for additional information. 4. See Note 15 for additional information. 5. The year ended December 31, 2020 primarily relates to a loss on the divestiture of a bio-ethanol manufacturing facility in Brazil, related to Packaging & Specialty Plastics. The year ended December 31, 2019 includes post-closing adjustments on previous divestitures, related to Corporate. 6. See Note 16 for additional information. 7. See Note 3 for additional information.
Schedule of Company-Owned Life Insurance	The Company has investments in company-owned life insurance policies ("COLI"), which are recorded at their cash surrender value as of each balance sheet date, as provided below: Investments in Company-Owned Life Insurance Dec 31, 2020 Dec 31, 2019 In millions Gross cash value $ 807 $ 820 Less: Existing drawdowns 1 — 85 Investments in company-owned life insurance 2 $ 807 $ 735 1. Classified as "Proceeds from sales and maturities of investments" in the consolidated statements of cash flows. 2. Classified as "Other investments" in the consolidated balance sheets.
Schedule of Cash Flow, Supplemental Disclosures	The following table shows cash paid for interest and income taxes for the years ended December 31, 2020, 2019 and 2018: Supplemental Cash Flow Information 2020 2019 2018 In millions Cash paid during year for: Interest $ 842 $ 993 $ 1,143 Income taxes $ 518 $ 881 $ 1,193

INCOME TAXES_2

INCOME TAXES	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	Geographic Allocation of Income and Provision for Income Taxes on Continuing Operations In millions 2020 2019 2018 Income (loss) from continuing operations before income taxes Domestic 1 $ (681) $ (1,196) $ 745 Foreign 2 2,752 (51) 3,004 Income (loss) from continuing operations before income taxes $ 2,071 $ (1,247) $ 3,749 Current tax expense (benefit) Federal $ (176) $ (287) $ 324 State and local 4 25 13 Foreign 691 960 901 Total current tax expense $ 519 $ 698 $ 1,238 Deferred tax expense (benefit) Federal 3 $ 184 $ 52 $ (318) State and local 19 19 (32) Foreign 55 (299) (79) Total deferred tax expense (benefit) $ 258 $ (228) $ (429) Provision for income taxes on continuing operations $ 777 $ 470 $ 809 Income (loss) from continuing operations, net of tax $ 1,294 $ (1,717) $ 2,940 1. The 2019 amount includes approximately $1.4 billion of expense related to goodwill impairment and environmental matters. See Notes 13 and 16 for additional information. 2. The 2019 amount includes approximately $1.8 billion of expense for Sadara related charges. See Note 12 for additional information. 3. The 2018 amount reflects the tax impact of the Tax Cuts and Jobs Act which accelerated the utilization of tax credits and required remeasurement of all U.S. deferred tax assets and liabilities.
Schedule of Effective Income Tax Rate Reconciliation	Reconciliation to U.S. Statutory Rate 2020 2019 2018 Statutory U.S. federal income tax rate 21.0 % 21.0 % 21.0 % Equity earnings effect 0.2 (3.2) (3.3) Foreign income taxed at rates other than the statutory U.S. federal income tax rate 1 1.7 (14.8) 6.7 U.S. tax effect of foreign earnings and dividends 3.9 1.9 (0.7) Unrecognized tax benefits 3.3 1.0 0.2 Divestitures 2 (5.1) — 0.8 Changes in valuation allowances 12.6 — — Impact of tax reform 3 — 11.1 (3.4) Federal tax accrual adjustment 4 — 10.4 — State and local income taxes 0.3 (4.4) 0.4 Sadara related charges 5 — (29.5) — Goodwill impairment 6 — (17.5) — Other - net (0.4) (13.7) (0.1) Effective tax rate 37.5 % (37.7) % 21.6 % 1. Includes the impact of valuation allowances and interest and penalties associated with uncertain tax positions in foreign jurisdictions. The 2020 impact from interest and penalties increased the effective tax rate by approximately 4 percent. 2. The 2020 impact relates to the divestiture of a bio-ethanol manufacturing facility in Brazil. See Note 6 for additional information. 3. Includes the impact of tax reform in Switzerland and the United States. 4. Primarily related to the favorable impact of the restoration of tax basis in assets, driven by a court judgment that did not involve the Company. 5. See Note 12 for additional information. 6. See Note 13 for additional information.
Schedule of Deferred Tax Assets and Liabilities	Deferred Tax Balances at Dec 31 2020 2019 In millions Assets Liabilities Assets Liabilities Property $ 499 $ 3,388 $ 494 $ 3,177 Tax loss and credit carryforwards 2,004 — 1,920 — Postretirement benefit obligations 2,712 250 2,432 210 Other accruals and reserves 1,507 43 1,678 43 Intangibles 124 638 120 688 Inventory 30 198 28 234 Investments 142 51 125 48 Other – net 858 196 851 120 Subtotal $ 7,876 $ 4,764 $ 7,648 $ 4,520 Valuation allowances (1,302) — (1,262) — Total $ 6,574 $ 4,764 $ 6,386 $ 4,520
Summary of Operating Loss Carryforwards	Operating Loss and Tax Credit Carryforwards at Dec 31 2020 2019 In millions Assets Assets Operating loss carryforwards Expire within 5 years $ 274 $ 263 Expire after 5 years or indefinite expiration 1,031 1,133 Total operating loss carryforwards $ 1,305 $ 1,396 Tax credit carryforwards Expire within 5 years $ 434 $ 32 Expire after 5 years or indefinite expiration 265 492 Total tax credit carryforwards $ 699 $ 524 Total operating loss and tax credit carryforwards $ 2,004 $ 1,920
Schedule of Total Gross Unrecognized Tax Benefits	The following table provides a reconciliation of the Company's unrecognized tax benefits: Total Gross Unrecognized Tax Benefits In millions 2020 2019 2018 Total unrecognized tax benefits at Jan 1 $ 319 $ 314 $ 255 Decreases related to positions taken on items from prior years (1) (1) (8) Increases related to positions taken on items from prior years 52 16 68 Increases related to positions taken in the current year 18 10 2 Settlement of uncertain tax positions with tax authorities (14) (19) — Decreases due to expiration of statutes of limitations (1) — (1) Foreign exchange gain — (1) (2) Total unrecognized tax benefits at Dec 31 $ 373 $ 319 $ 314 Total unrecognized tax benefits that, if recognized, would impact the effective tax rate $ 285 $ 234 $ 235 Total amount of interest and penalties expense (benefit) recognized in "Provision for income taxes on continuing operations" $ 84 $ (11) $ (12) Total accrual for interest and penalties recognized in the consolidated balance sheets $ 144 $ 100 $ 109
Schedule of Tax Years Subject to Examination by Major Tax Jurisdiction	Tax years that remain subject to examination for the Company’s major tax jurisdictions are shown below: Tax Years Subject to Examination by Major Tax Jurisdiction at Dec 31, 2020 Earliest Open Year Jurisdiction Argentina 2014 Brazil 2015 Canada 2012 China 2010 Germany 2014 Italy 2016 The Netherlands 2016 Switzerland 2016 United States: Federal income tax 2004 State and local income tax 2004

EARNINGS PER SHARE_2

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following tables provide earnings per share calculations of Dow Inc. for the years ended December 31, 2020, 2019, and 2018. In accordance with the accounting guidance for earnings per share, earnings per share of TDCC is not presented as this information is not required in financial statements of wholly owned subsidiaries. Net Income (Loss) for Earnings Per Share Calculations 2020 2019 2018 In millions Income (loss) from continuing operations, net of tax $ 1,294 $ (1,717) $ 2,940 Net income attributable to noncontrolling interests - continuing operations (69) (74) (102) Net income attributable to participating securities - continuing operations 1 (9) (6) — Income (loss) from continuing operations attributable to common stockholders $ 1,216 $ (1,797) $ 2,838 Income from discontinued operations, net of tax $ — $ 445 $ 1,835 Net income attributable to noncontrolling interests - discontinued operations — (13) (32) Income from discontinued operations attributable to common stockholders $ — $ 432 $ 1,803 Net income (loss) attributable to common stockholders $ 1,216 $ (1,365) $ 4,641 Earnings (Loss) Per Share Calculations - Basic 2020 2019 2018 Dollars per share Income (loss) from continuing operations attributable to common stockholders $ 1.64 $ (2.42) $ 3.80 Income from discontinued operations, net of tax — 0.58 2.41 Net income (loss) attributable to common stockholders $ 1.64 $ (1.84) $ 6.21 Earnings (Loss) Per Share Calculations - Diluted 2020 2019 2018 Dollars per share Income (loss) from continuing operations attributable to common stockholders $ 1.64 $ (2.42) $ 3.80 Income from discontinued operations, net of tax — 0.58 2.41 Net income (loss) attributable to common stockholders $ 1.64 $ (1.84) $ 6.21 Share Count Information 2020 2019 2018 Shares in millions Weighted-average common shares outstanding - basic 2 740.5 742.5 747.2 Plus dilutive effect of equity compensation plans 3 1.8 — — Weighted-average common shares outstanding - diluted 2, 3 742.3 742.5 747.2 Stock options and restricted stock units excluded from EPS calculations 4 14.2 20.8 — 1. Restricted stock units are considered participating securities due to the Company's practice of paying dividend equivalents on unvested shares. 2. Share amounts for the year ended December 31, 2018 were based on 2,246.3 million DowDuPont common shares outstanding as of the Record Date for the April 1, 2019 distribution, less 4.6 million Employee Stock Ownership Plan ("ESOP") shares that had not been released and were not considered outstanding, adjusted for the Distribution Ratio. There was no dilutive effect for the year ended December 31, 2018 as the Company did not engage in activities giving rise to dilution. 3. The year ended December 31, 2019 reflected a loss from continuing operations, and as such, the basic share count was used for purposes of calculating earnings per share on a diluted basis. 4. These outstanding options to purchase shares of common stock and restricted stock units were excluded from the calculation of diluted earnings per share because the effect of including them would have been antidilutive. For the year ended December 31, 2018, the Company did not engage in activities giving rise to dilution.

INVENTORIES_2

INVENTORIES	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Schedule of Inventory	The following table provides a breakdown of inventories: Inventories at Dec 31 In millions 2020 2019 Finished goods $ 3,140 $ 3,505 Work in process 996 1,122 Raw materials 598 628 Supplies 933 845 Total $ 5,667 $ 6,100 Adjustment of inventories to the LIFO basis 34 114 Total inventories $ 5,701 $ 6,214

PROPERTY_2

PROPERTY	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of property	The following table provides a breakdown of property: Property at Dec 31 Estimated Useful 2020 2019 In millions Land and land improvements 0-25 $ 2,011 $ 2,177 Buildings 5-50 4,976 4,742 Machinery and equipment 3-25 42,108 40,651 Other property 3-50 5,626 5,354 Construction in progress 1 — 1,604 1,986 Total property $ 56,325 $ 54,910 1. The decrease is primarily related to the Company proactively reducing capital spending in 2020 to focus on cash and maintaining financial strength during the COVID-19 pandemic. In millions 2020 2019 2018 Depreciation expense $ 2,092 $ 2,156 $ 2,174 Capitalized interest $ 64 $ 80 $ 88

NONCONSOLIDATED AFFILIATES_2

NONCONSOLIDATED AFFILIATES	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Nonconsolidated Affiliates - Investments and Dividends	The Company’s investments in companies accounted for using the equity method (“nonconsolidated affiliates”) and dividends received from nonconsolidated affiliates are shown in the following tables: Investments in Nonconsolidated Affiliates at Dec 31 2020 1 2019 1 In millions Investment in nonconsolidated affiliates $ 1,327 $ 1,404 Other noncurrent obligations (169) (80) Net investment in nonconsolidated affiliates $ 1,158 $ 1,324 1. The carrying amount of the Company’s investments in nonconsolidated affiliates at December 31, 2020, was $55 million less than its share of the investees’ net assets, ($51 million less at December 31, 2019), exclusive of additional differences relating to Sadara, EQUATE Petrochemical Company K.S.C.C. ("EQUATE") and AgroFresh Solutions Inc. ("AFSI"), which are discussed separately in the disclosures that follow. Dividends Received from Nonconsolidated Affiliates 2020 2019 2018 In millions Dividends from nonconsolidated affiliates $ 425 $ 1,020 $ 663
Balances Due To or Due From Nonconsolidated Affiliates	Balances due to or due from nonconsolidated affiliates at December 31, 2020 and 2019 were as follows: Balances Due To or Due From Nonconsolidated Affiliates at Dec 31 2020 2019 In millions Accounts and notes receivable - Other $ 229 $ 211 Accounts payable - Other $ 1,075 $ 1,092	The following table presents revenue earned and expenses incurred related to transactions with Historical DuPont and its affiliates: Sales to Historical DuPont and its Affiliates 2019 2018 In millions Net sales $ 12 $ 55 Cost of sales $ 9 $ 42
Equity Method Investment	The Company's principal nonconsolidated affiliates and its ownership interest (direct and indirect) for each at December 31, 2020, 2019 and 2018 are as follows: Principal Nonconsolidated Affiliates at Dec 31 Country Ownership Interest 2020 2019 2018 EQUATE Petrochemical Company K.S.C.C. Kuwait 42.5 % 42.5 % 42.5 % The Kuwait Olefins Company K.S.C.C. Kuwait 42.5 % 42.5 % 42.5 % The Kuwait Styrene Company K.S.C.C. Kuwait 42.5 % 42.5 % 42.5 % Map Ta Phut Olefins Company Limited 1 Thailand 32.77 % 32.77 % 32.77 % Sadara Chemical Company Saudi Arabia 35 % 35 % 35 % The SCG-Dow Group: Siam Polyethylene Company Limited Thailand 50 % 50 % 50 % Siam Polystyrene Company Limited Thailand 50 % 50 % 50 % Siam Styrene Monomer Company Limited Thailand 50 % 50 % 50 % Siam Synthetic Latex Company Limited Thailand 50 % 50 % 50 % 1. The Company's effective ownership of Map Ta Phut Olefins Company Limited ("Map Ta Phut") is 32.77 percent, of which the Company directly owns 20.27 percent and indirectly owns 12.5 percent through its equity interest in Siam Polyethylene Company Limited. The Company’s investment in and equity earnings from its principal nonconsolidated affiliates are shown in the tables below: Investment in Principal Nonconsolidated Affiliates at Dec 31 2020 2019 In millions Investment in nonconsolidated affiliates $ 922 $ 963 Other noncurrent obligations (169) (80) Net investment in principal nonconsolidated affiliates $ 753 $ 883 Equity in Earnings (Losses) of Principal Nonconsolidated Affiliates 2020 2019 2018 In millions Equity in earnings (losses) of principal nonconsolidated affiliates $ (16) $ 21 $ 561
Equity Method Investment Summarized Balance Sheet Information	The summarized financial information that follows represents the combined accounts (at 100 percent) of the principal nonconsolidated affiliates. Summarized Balance Sheet Information at Dec 31 2020 2019 In millions Current assets $ 5,044 $ 5,302 Noncurrent assets 25,298 26,477 Total assets $ 30,342 $ 31,779 Current liabilities $ 3,942 $ 3,743 Noncurrent liabilities 20,144 20,271 Total liabilities $ 24,086 $ 24,014 Noncontrolling interests $ 132 $ 110
Equity Method Investment Summarized Income Statement Information	Summarized Income Statement Information 1 2020 2019 2018 In millions Sales $ 9,470 $ 10,905 $ 14,461 Gross profit $ 619 $ 644 $ 2,320 Income (loss) from continuing operations, net of tax $ (461) $ (277) $ 1,173 1. The results in this table reflect purchase and sale activity between certain principal nonconsolidated affiliates and the Company, as previously discussed in the "Transactions with Nonconsolidated Affiliates" section.

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill	The following table shows changes in the carrying amounts of goodwill by reportable segment for the years ended December 31, 2020 and 2019: Goodwill Packaging & Specialty Plastics Industrial Intermediates & Infrastructure Performance Materials & Coatings Total In millions Balance at Jan 1, 2019 $ 5,101 $ 1,095 $ 3,650 $ 9,846 Foreign currency impact 8 6 (24) (10) Goodwill Impairment — — (1,039) (1,039) Other — (1) — (1) Balance at Dec 31, 2019 $ 5,109 $ 1,100 $ 2,587 $ 8,796 Foreign currency impact 12 4 106 122 Sale of rail infrastructure (2) — — (2) Sale of marine and terminal infrastructure (4) (4) — (8) Balance at Dec 31, 2020 $ 5,115 $ 1,100 $ 2,693 $ 8,908
Schedule of Intangible Assets and Goodwill	The following table provides information regarding the Company’s other intangible assets: Other Intangible Assets at Dec 31 2020 2019 In millions Gross Accum Amort Net Gross Accum Amort Net Intangible assets with finite lives: Developed technology $ 2,638 $ (1,677) $ 961 $ 2,634 $ (1,467) $ 1,167 Software 1,489 (989) 500 1,449 (893) 556 Trademarks/tradenames 352 (343) 9 352 (342) 10 Customer-related 3,301 (1,419) 1,882 3,207 (1,184) 2,023 Total other intangible assets, finite lives $ 7,780 $ (4,428) $ 3,352 $ 7,642 $ (3,886) $ 3,756 In-process research and development — — — 3 — 3 Total other intangible assets $ 7,780 $ (4,428) $ 3,352 $ 7,645 $ (3,886) $ 3,759
Finite-lived Intangible Assets Amortization Expense	The following table provides information regarding amortization expense from continuing operations related to intangible assets: Amortization Expense from Continuing Operations 2020 2019 2018 In millions Other intangible assets, excluding software $ 401 $ 419 $ 469 Software, included in "Cost of sales" $ 96 $ 96 $ 93
Schedule of estimated future amortization expense	Total estimated amortization expense from continuing operations for the next five fiscal years, including amounts expected to be capitalized, is as follows: Estimated Amortization Expense for Next Five Years In millions 2021 $ 477 2022 $ 415 2023 $ 384 2024 $ 366 2025 $ 275

NOTES PAYABLE, LONG-TERM DEBT_2

NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of notes payable	Notes Payable at Dec 31 In millions 2020 2019 Commercial paper $ — $ 151 Notes payable to banks and other lenders 156 435 Total notes payable $ 156 $ 586 Year-end average interest rates 3.89 % 6.30 %
Schedule of long-term debt	Long-Term Debt at Dec 31 2020 Average Rate 2020 2019 2019 In millions Promissory notes and debentures: Final maturity 2020 — % $ — 8.44 % $ 76 Final maturity 2021 8.95 % 173 8.95 % 174 Final maturity 2022 8.64 % 121 3.50 % 1,372 Final maturity 2023 7.63 % 250 7.64 % 325 Final maturity 2024 1 3.43 % 1,017 3.37 % 1,397 Final maturity 2025 5.13 % 625 5.26 % 662 Final maturity 2026 and thereafter 1 5.22 % 10,888 5.73 % 8,820 Other facilities: U.S. dollar loans — % — 2.55 % 2,000 Foreign currency notes and loans, various rates and maturities 1.41 % 3,189 3.26 % 592 InterNotes®, varying maturities through 2050 3.56 % 535 3.44 % 928 Finance lease obligations 2 518 395 Unamortized debt discount and issuance costs (365) (331) Long-term debt due within one year 3 (460) (435) Long-term debt $ 16,491 $ 15,975 1. Cost includes net fair value hedge adjustment gains of $69 million at December 31, 2020 ($1 million at December 31, 2019). See Note 22 for additional information. 2. See Note 17 for additional information. 3. Presented net of current portion of unamortized debt issuance costs.
Schedule of maturities of long-term debt	Maturities of Long-Term Debt for Next Five Years at Dec 31, 2020 In millions 2021 $ 460 2022 $ 236 2023 $ 381 2024 $ 1,079 2025 $ 717
Schedule of committed and available credit facilities	The following table summarizes the Company's credit facilities: Committed and Available Credit Facilities at Dec 31, 2020 In millions Committed Credit Credit Available Maturity Date Interest Five Year Competitive Advance and Revolving Credit Facility $ 5,000 $ 5,000 October 2024 Floating rate Bilateral Revolving Credit Facility 200 200 November 2021 Floating rate Bilateral Revolving Credit Facility 300 300 December 2021 Floating rate Bilateral Revolving Credit Facility 300 300 December 2021 Floating rate Bilateral Revolving Credit Facility 150 150 March 2022 Floating rate Bilateral Revolving Credit Facility 100 100 June 2022 Floating rate Bilateral Revolving Credit Facility 200 200 September 2022 Floating rate Bilateral Revolving Credit Facility 200 200 September 2023 Floating rate Bilateral Revolving Credit Facility 250 250 September 2023 Floating rate Bilateral Revolving Credit Facility 300 300 September 2023 Floating rate Bilateral Revolving Credit Facility 100 100 October 2024 Floating rate Bilateral Revolving Credit Facility 100 100 October 2024 Floating rate Bilateral Revolving Credit Facility 200 200 November 2024 Floating rate Bilateral Revolving Credit Facility 100 100 March 2025 Floating rate Bilateral Revolving Credit Facility 250 250 March 2025 Floating rate Bilateral Revolving Credit Facility 350 350 March 2025 Floating rate Total Committed and Available Credit Facilities $ 8,100 $ 8,100

COMMITMENTS AND CONTINGENT LI_2

COMMITMENTS AND CONTINGENT LIABILITIES	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Environmental Loss Contingency Disclosure	The following table summarizes the activity in the Company's accrued obligations for environmental matters for the years ended December 31, 2020 and 2019: Accrued Obligations for Environmental Matters 2020 2019 In millions Balance at Jan 1 $ 1,155 $ 810 Accrual adjustment 285 590 Payments against reserve (198) (241) Foreign currency impact 2 (4) Balance at Dec 31 $ 1,244 $ 1,155
Schedule of Guarantor Obligations	The following table provides a summary of the final expiration, maximum future payments and recorded liability reflected in the consolidated balance sheets for guarantees: Guarantees Dec 31, 2020 Dec 31, 2019 In millions Final Maximum Future Payments Recorded Liability Final Maximum Future Payments Recorded Liability Guarantees 2023 $ 251 $ 2 2023 $ 3,952 $ 10
Schedule of Change in Asset Retirement Obligation	The following table shows changes in the aggregate carrying amount of the Company’s asset retirement obligations for the years ended December 31, 2020 and 2019: Asset Retirement Obligations 2020 2019 In millions Balance at Jan 1 $ 104 $ 109 Additional accruals 6 10 Liabilities settled (3) (7) Accretion expense 3 2 Revisions in estimated cash flows 7 3 Other (5) (13) Balance at Dec 31 $ 112 $ 104

LEASES_2

LEASES	12 Months Ended
	Dec. 31, 2020
Lease, Cost [Table Text Block]	The components of lease cost for operating and finance leases for the years ended December 31, 2020 and 2019 were as follows: Lease Cost 2020 2019 In millions Operating lease cost $ 484 $ 532 Finance lease cost Amortization of right-of-use assets - finance $ 58 $ 39 Interest on lease liabilities - finance 25 25 Total finance lease cost $ 83 $ 64 Short-term lease cost $ 213 $ 204 Variable lease cost 199 198 Sublease income (5) (4) Total lease cost $ 974 $ 994
Schedule of Supplemental Cash Flow Information Related to Leases [Table Text Block]	The following table provides supplemental cash flow information related to leases: Other Lease Information 2020 2019 In millions Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 482 $ 544 Operating cash flows for finance leases $ 25 $ 25 Financing cash flows for finance leases $ 58 $ 34
Schedule of Lease Assets and Liabilities [Table Text Block]	The following table summarizes the lease-related assets and liabilities recorded in the consolidated balance sheets at December 31, 2020 and 2019. Lease Position Balance Sheet Classification Dec 31, 2020 Dec 31, 2019 In millions Right-of-use assets obtained in exchange for lease obligations: Operating leases 1 $ 185 $ 2,476 Finance leases $ 178 $ 89 Assets Operating lease assets Operating lease right-of-use assets $ 1,856 $ 2,072 Finance lease assets Property 665 486 Finance lease amortization Accumulated depreciation (216) (167) Total lease assets $ 2,305 $ 2,391 Liabilities Current Operating Operating lease liabilities - current $ 416 $ 421 Finance Long-term debt due within one year 54 32 Noncurrent Operating Operating lease liabilities - noncurrent 1,521 1,739 Finance Long-Term Debt 464 363 Total lease liabilities $ 2,455 $ 2,555 1. Includes $2.3 billion for the period ended December 31, 2019 related to the adoption of Topic 842. See Note 1 for additional information.
Lease Terms and Discount Rates [Table Text Block]	The weighted-average remaining lease term and discount rate for leases recorded in the consolidated balance sheets at December 31, 2020 and 2019 are provided below: Lease Term and Discount Rate Dec 31, 2020 Dec 31, 2019 Weighted-average remaining lease term Operating leases 7.6 years 8.0 years Finance leases 11.6 years 12.3 years Weighted-average discount rate Operating leases 3.84 % 4.09 % Finance leases 5.41 % 6.28 %
Maturities of Lease Liabilities [Table Text Block]	The following table provides the maturities of lease liabilities at December 31, 2020: Maturities of Lease Liabilities Operating Leases Finance Leases In millions 2021 $ 477 $ 78 2022 387 74 2023 312 98 2024 242 45 2025 164 41 2026 and thereafter 703 373 Total future undiscounted lease payments $ 2,285 $ 709 Less: Imputed interest 348 191 Total present value of lease liabilities $ 1,937 $ 518
Schedule of Guarantor Obligations	The following table provides a summary of the final expiration, maximum future payments and recorded liability reflected in the consolidated balance sheets for guarantees: Guarantees Dec 31, 2020 Dec 31, 2019 In millions Final Maximum Future Payments Recorded Liability Final Maximum Future Payments Recorded Liability Guarantees 2023 $ 251 $ 2 2023 $ 3,952 $ 10
Residual Value Guarantees
Schedule of Guarantor Obligations	Lease Guarantees Dec 31, 2020 Dec 31, 2019 In millions Final Expiration Maximum Future Payments Recorded Liability Final Expiration Maximum Future Payments Recorded Liability Residual value guarantees 2030 $ 818 $ 22 2028 $ 792 $ —

STOCKHOLDERS' EQUITY_2

STOCKHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward	The following table provides a reconciliation of Dow Inc. common stock activity for the years ended December 31, 2020 and 2019: Shares of Dow Inc. Common Stock Issued Held in Treasury Balance at Jan 1, 2019 100 — Impact of recapitalization 748,771,140 — Issued 1 2,457,404 — Repurchased — 9,729,834 Balance at Jan 1, 2020 751,228,644 9,729,834 Issued 1 4,764,554 — Repurchased — 3,073,469 Balance at Dec 31, 2020 755,993,198 12,803,303 1. Shares issued to employees and non-employee directors under the Company's equity compensation plans.
Comprehensive Income (Loss)	The changes in each component of AOCL for the years ended December 31, 2020, 2019 and 2018 were as follows: Accumulated Other Comprehensive Loss 2020 2019 2018 In millions Unrealized Gains (Losses) on Investments Beginning balance $ 64 $ (51) $ 17 Unrealized gains (losses) on investments 104 178 (93) Less: Tax (expense) benefit (23) (38) 19 Net unrealized gains (losses) on investments 81 140 (74) (Gains) losses reclassified from AOCL to net income 1 (54) (33) 9 Less: Tax expense (benefit) 2 13 8 (2) Net (gains) losses reclassified from AOCL to net income (41) (25) 7 Other comprehensive income (loss), net of tax 40 115 (67) Reclassification of stranded tax effects 3 — — (1) Ending balance $ 104 $ 64 $ (51) Cumulative Translation Adjustment Beginning balance $ (1,135) $ (1,813) $ (1,481) Gains (losses) on foreign currency translation 227 59 (215) Less: Tax (expense) benefit 25 (2) (6) Net gains (losses) on foreign currency translation 252 57 (221) (Gains) losses reclassified from AOCL to net income 4 (47) (89) (4) Other comprehensive income (loss), net of tax 205 (32) (225) Impact of common control transaction 5 — 710 — Reclassification of stranded tax effects 3 — — (107) Ending balance $ (930) $ (1,135) $ (1,813) Pension and Other Postretirement Benefits Beginning balance $ (8,781) $ (7,965) $ (6,998) Gains (losses) arising during the period (1,769) (1,699) (625) Less: Tax (expense) benefit 411 413 130 Net gains (losses) arising during the period (1,358) (1,286) (495) Amortization and recognition of net loss and prior service credits 6 753 504 594 Less: Tax expense (benefit) 2 (173) (117) (139) Net loss and prior service credits reclassified from AOCL to net income 580 387 455 Other comprehensive income (loss), net of tax (778) (899) (40) Impact of common control transaction 5 — 83 — Reclassification of stranded tax effects 3 — — (927) Ending balance $ (9,559) $ (8,781) $ (7,965) Derivative Instruments Beginning balance $ (394) $ (56) $ (109) Gains (losses) on derivative instruments (96) (470) 6 Less: Tax (expense) benefit (1) 101 (2) Net gains (losses) on derivative instruments (97) (369) 4 (Gains) losses reclassified from AOCL to net income 7 30 44 89 Less: Tax expense (benefit) 2 (9) (13) (18) Net (gains) losses reclassified from AOCL to net income 21 31 71 Other comprehensive income (loss), net of tax (76) (338) 75 Reclassification of stranded tax effects 3 — — (22) Ending balance $ (470) $ (394) $ (56) Total AOCL ending balance $ (10,855) $ (10,246) $ (9,885) 1. Reclassified to "Net sales" and "Sundry income (expense) - net." 2. Reclassified to "Provision for income taxes on continuing operations." 3. Amounts reclassified to "Retained earnings" as a result of the adoption of ASU 2018-02. 4. Reclassified to "Sundry income (expense) - net." 5. Reclassified to "Retained earnings" as a result of the separation from DowDuPont on April 1, 2019. See Note 3 for additional information. 6. These AOCL components are included in the computation of net periodic benefit cost of the Company's defined benefit pension and other postretirement benefit plans. See Note 20 for additional information. 7. Reclassified to "Cost of sales," "Sundry income (expense) - net" and "Interest expense and amortization of debt discount."

NONCONTROLLING INTERESTS Noncon

NONCONTROLLING INTERESTS Noncontrolling Interests	12 Months Ended
	Dec. 31, 2020
Noncontrolling Interest [Abstract]
Noncontrolling Interests	The following table summarizes the activity for equity attributable to noncontrolling interests for the years ended December 31, 2020, 2019 and 2018: Noncontrolling Interests In millions 2020 2019 2018 Balance at Jan 1 $ 553 $ 1,138 $ 1,186 Net income attributable to noncontrolling interests - continuing operations 69 74 102 Net income attributable to noncontrolling interests - discontinued operations — 13 32 Distributions to noncontrolling interests 1 (55) (77) (145) Impact of common control transaction 2 — (353) — Purchase of noncontrolling interests 3 — (254) — Deconsolidation of noncontrolling interests 4 (7) — — Cumulative translation adjustments 9 12 (39) Other 1 — 2 Balance at Dec 31 $ 570 $ 553 $ 1,138 1. Distributions to noncontrolling interests are net of $7 million in 2020 ($7 million in 2019 and $27 million in 2018) in dividends paid to a joint venture, which were reclassified to "Equity in earnings (losses) of nonconsolidated affiliates" in the consolidated statements of income. Also includes amounts attributable to discontinued operations of $7 million in 2019 and $37 million in 2018. 2. Related to the separation from DowDuPont. See Note 3 for additional information. 3. Related to the acquisition of full ownership in a propylene oxide manufacturing joint venture, which occurred on October 1, 2019. See Note 24 for additional information. As a result of this arrangement, the carrying value of the noncontrolling interest was removed, and “Additional paid-in capital” was adjusted by $38 million. 4. Related to the divestiture of the Company's interest in a cogeneration facility in Brazil in the third quarter of 2020. See Note 24 for additional information.

PENSION PLANS AND OTHER POSTR_2

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS	12 Months Ended
	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Schedule of Change in Projected Benefit Obligations, Plan Assets and Funded Status of All Significant Plans	Summarized information on the Company's pension and other postretirement benefit plans is as follows: Change in Projected Benefit Obligations, Plan Assets and Funded Status of All Significant Plans Defined Benefit Pension Plans Other Postretirement Benefit Plans In millions 2020 2019 2020 2019 Change in projected benefit obligations: Benefit obligations at beginning of year $ 32,621 $ 29,600 $ 1,535 $ 1,478 Impact of plans transferred to DowDuPont at separation — (331) — — Service cost 399 396 7 8 Interest cost 767 921 40 49 Plan participants' contributions 12 12 — — Actuarial changes in assumptions and experience 3,021 3,904 7 148 Benefits paid (1,569) (1,684) (132) (148) Plan amendments 8 — — — Acquisitions/divestitures/other 1 (692) (37) — — Effect of foreign exchange rates 791 14 7 3 Termination benefits/curtailments/settlements 2 (49) (174) — (3) Benefit obligations at end of year $ 35,309 $ 32,621 $ 1,464 $ 1,535 Change in plan assets: Fair value of plan assets at beginning of year $ 24,908 $ 22,544 $ — $ — Impact of plans transferred to DowDuPont at separation — (61) — — Actual return on plan assets 2,877 3,790 — — Employer contributions 299 266 — — Plan participants' contributions 12 12 — — Benefits paid (1,569) (1,684) — — Other 3 (681) — — — Effect of foreign exchange rates 571 41 — — Settlements (11) — — — Fair value of plan assets at end of year $ 26,406 $ 24,908 $ — $ — Funded status: U.S. plans with plan assets $ (5,873) $ (4,768) $ — $ — Non-U.S. plans with plan assets (2,222) (2,207) — — All other plans (808) (738) (1,464) (1,535) Funded status at end of year $ (8,903) $ (7,713) $ (1,464) $ (1,535) Amounts recognized in the consolidated balance sheets at Dec 31: Deferred charges and other assets $ 1,007 $ 623 $ — $ — Accrued and other current liabilities (54) (49) (113) (128) Pension and other postretirement benefits - noncurrent (9,856) (8,287) (1,351) (1,407) Net amount recognized $ (8,903) $ (7,713) $ (1,464) $ (1,535) Pretax amounts recognized in accumulated other comprehensive loss at Dec 31: Net loss (gain) $ 12,736 $ 11,761 $ (129) $ (147) Prior service credit (154) (177) — — Pretax balance in accumulated other comprehensive loss at end of year $ 12,582 $ 11,584 $ (129) $ (147) 1. The 2020 impact relates primarily to the transfer of benefit obligations in the U.S. through the purchase of annuity contracts from an insurance company. The 2019 impact includes the divestiture of a business with pension benefit obligations of $53 million. 2. The 2020 impact relates to pension plan curtailments of a European plan resulting from the 2020 Restructuring Program and the settlement of certain plan obligations of a U.S. non-qualified pension plan resulting from lump-sum payments. The 2019 impact relates to plan curtailments and associated special termination benefits resulting from the reduction in plan participation due to the separation from DowDuPont. 3. The 2020 impact relates to the purchase of annuity contracts associated with the transfer of benefit obligations to an insurance company.
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets at Dec 31 2020 2019 In millions Accumulated benefit obligations $ 29,084 $ 26,959 Fair value of plan assets $ 20,130 $ 19,571
Schedule of Projected Benefit Obligations in Excess of Fair Value of Plan Assets	Pension Plans with Projected Benefit Obligations in Excess of Plan Assets at Dec 31 2020 2019 In millions Projected benefit obligations $ 30,161 $ 28,013 Fair value of plan assets $ 20,251 $ 19,677
Schedule of Net Benefit Costs	Net Periodic Benefit Costs for All Significant Plans for the Year Ended Dec 31 Defined Benefit Pension Plans Other Postretirement Benefit Plans In millions 2020 2019 2018 2020 2019 2018 Net Periodic Benefit Costs: Service cost $ 399 $ 396 $ 520 $ 7 $ 8 $ 12 Interest cost 767 921 886 40 49 45 Expected return on plan assets (1,658) (1,679) (1,644) — — — Amortization of prior service credit (19) (20) (24) — — — Amortization of unrecognized (gain) loss 773 574 642 (10) (20) (24) Curtailment/settlement/other 1 9 (27) — — (3) — Net periodic benefit costs $ 271 $ 165 $ 380 $ 37 $ 34 $ 33 Less: discontinued operations — 21 101 — — 3 Net periodic benefit costs - continuing operations $ 271 $ 144 $ 279 $ 37 $ 34 $ 30 Changes in plan assets and benefit obligations recognized in other comprehensive (income) loss: Net (gain) loss $ 1,753 $ 1,606 $ 584 $ 8 $ 145 $ (13) Prior service cost 8 — 17 — — — Amortization of prior service credit 19 20 24 — — — Amortization of unrecognized gain (loss) (773) (574) (642) 10 20 24 Common control transaction 2 — (112) — — — — Curtailment and settlement gain (loss) 1 (9) 27 — — 3 — Total recognized in other comprehensive (income) loss $ 998 $ 967 $ (17) $ 18 $ 168 $ 11 Total recognized in net periodic benefit cost and other comprehensive (income) loss $ 1,269 $ 1,132 $ 363 $ 55 $ 202 $ 44 1. The 2020 impact relates to pension plan curtailments of a European plan resulting from the 2020 Restructuring Program and the settlement of certain plan obligations of a U.S. non-qualified pension plan resulting from lump-sum payments. The 2019 impact relates to plan curtailments and associated special termination benefits resulting from the reduction in plan participation due to the separation from DowDuPont.
Schedule of Expected Benefit Payments	The estimated future benefit payments of continuing operations, reflecting expected future service, as appropriate, are presented in the following table: Estimated Future Benefit Payments at Dec 31, 2020 Defined Benefit Pension Plans Other Postretirement Benefit Plans In millions 2021 $ 1,647 $ 114 2022 1,595 103 2023 1,593 102 2024 1,604 101 2025 1,641 100 2026-2030 8,419 449 Total $ 16,499 $ 969
Schedule of Allocation of Plan Assets	The weighted-average target allocation for plan assets of the Company's pension plans is summarized as follows: Target Allocation for Plan Assets at Dec 31, 2020 Target Allocation Asset Category Equity securities 35 % Fixed income securities 36 Alternative investments 28 Other investments 1 Total 100 %
Schedule of Defined Benefit Plans Disclosures	The following table summarizes the bases used to measure the Company’s pension plan assets at fair value for the years ended December 31, 2020 and 2019: Basis of Fair Value Measurements Dec 31, 2020 Dec 31, 2019 In millions Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 1,298 $ 1,103 $ 195 $ — $ 754 $ 675 $ 79 $ — Equity securities: U.S. equity securities 1 $ 3,934 $ 3,911 $ 22 $ 1 $ 3,844 $ 3,752 $ 91 $ 1 Non - U.S. equity securities 5,186 4,213 964 9 4,646 3,819 801 26 Total equity securities $ 9,120 $ 8,124 $ 986 $ 10 $ 8,490 $ 7,571 $ 892 $ 27 Fixed income securities: Debt - government-issued $ 4,998 $ 128 $ 4,870 $ — $ 4,992 $ 197 $ 4,795 $ — Debt - corporate-issued 3,970 553 3,416 1 3,697 607 3,089 1 Debt - asset-backed 103 — 102 1 70 — 69 1 Total fixed income securities $ 9,071 $ 681 $ 8,388 $ 2 $ 8,759 $ 804 $ 7,953 $ 2 Alternative investments: Private markets $ 13 $ — $ — $ 13 $ 11 $ — $ — $ 11 Real estate 51 51 — — 25 25 — — Derivatives - asset position 697 2 695 — 574 2 572 — Derivatives - liability position (594) (1) (593) — (513) (2) (511) — Total alternative investments $ 167 $ 52 $ 102 $ 13 $ 97 $ 25 $ 61 $ 11 Other investments $ 472 $ 22 $ 448 $ 2 $ 411 $ 28 $ 383 $ — Subtotal $ 20,128 $ 9,982 $ 10,119 $ 27 $ 18,511 $ 9,103 $ 9,368 $ 40 Investments measured at net asset value: Hedge funds $ 1,350 $ 1,595 Private markets 3,135 2,794 Real estate 1,886 2,110 Total investments measured at net asset value $ 6,371 $ 6,499 Items to reconcile to fair value of plan assets: Pension trust receivables 2 $ 66 $ 70 Pension trust payables 3 (159) (172) Total $ 26,406 $ 24,908 1. No Dow Inc. common stock was directly held at December 31, 2020 or December 31, 2019. 2. Primarily receivables for investment securities sold. 3. Primarily payables for investment securities purchased.
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets	The following table summarizes the changes in the fair value of Level 3 pension plan assets for the years ended December 31, 2020 and 2019: Fair Value Measurement of Level 3 Pension Plan Assets Equity Securities Fixed Income Securities Alternative Investments Other Investments Total In millions Balance at Jan 1, 2019 $ 39 $ 1 $ 1 $ — $ 41 Actual return on assets: Relating to assets sold during 2019 (2) — — — (2) Relating to assets held at Dec 31, 2019 1 — (14) — (13) Purchases, sales and settlements, net (11) 1 24 — 14 Balance at Dec 31, 2019 $ 27 $ 2 $ 11 $ — $ 40 Actual return on assets: Relating to assets sold during 2020 — — (11) — (11) Relating to assets held at Dec 31, 2020 (1) — 8 (1) 6 Purchases, sales and settlements, net (19) (1) 5 3 (12) Transfers into Level 3, net 3 1 — — 4 Balance at Dec 31, 2020 $ 10 $ 2 $ 13 $ 2 $ 27
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Schedule of Assumptions Used	The weighted-average assumptions used to determine pension plan obligations and net periodic benefit costs for all plans are summarized in the table below: Weighted-Average Assumptions for All Pension Plans Benefit Obligations Net Periodic Costs 2020 2019 2020 2019 2018 Discount rate 2.20 % 2.81 % 2.81 % 3.50 % 3.17 % Interest crediting rate for applicable benefits 3.55 % 3.51 % 3.51 % 3.72 % 3.61 % Rate of compensation increase 3.91 % 3.92 % 3.92 % 3.92 % 3.88 % Expected return on plan assets 7.00 % 7.11 % 7.11 % The weighted-average assumptions used to determine pension plan obligations and net periodic benefit costs for U.S. plans are summarized in the table below: Weighted-Average Assumptions for U.S. Pension Plans Benefit Obligations Net Periodic Costs 2020 2019 2020 2019 2018 Discount rate 2.71 % 3.41 % 3.41 % 4.15 % 3.66 % Interest crediting rate for applicable benefits 4.50 % 4.50 % 4.50 % 4.50 % 4.50 % Rate of compensation increase 4.25 % 4.25 % 4.25 % 4.25 % 4.25 % Expected return on plan assets 7.95 % 7.92 % 7.92 %
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Schedule of Assumptions Used	The weighted-average assumptions used to determine other postretirement benefit plan obligations and net periodic benefit costs for the U.S. plans are provided below: Weighted-Average Assumptions for U.S. Other Postretirement Benefits Plans Benefit Obligations Net Periodic Costs 2020 2019 2020 2019 2018 Discount rate 2.38 % 3.19 % 3.19 % 4.01 % 3.51 % Health care cost trend rate assumed for next year 6.75 % 6.25 % 6.25 % 6.50 % 6.75 % Rate to which the cost trend rate is assumed to decline (the ultimate health care cost trend rate) 5.00 % 5.00 % 5.00 % 5.00 % 5.00 % Year that the rate reaches the ultimate health care cost trend rate 2028 2025 2025 2025 2025

STOCK-BASED COMPENSATION_2

STOCK-BASED COMPENSATION	12 Months Ended
	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The weighted-average assumptions used to calculate total stock-based compensation are included in the following table: Weighted-Average Assumptions 2020 2019 2018 Dividend yield 5.80 % 5.10 % 2.13 % Expected volatility 26.70 % 26.10 % 23.34 % Risk-free interest rate 1.49 % 2.43 % 2.83 % Expected life of stock options granted during period (years) 6.1 6.1 6.2
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Stock Options, Activity	The following table summarizes stock option activity for 2020: Stock Options 2020 Shares in thousands Shares Exercise Price 1 Outstanding at Jan 1, 2020 21,265 $ 45.96 Granted 2,191 $ 48.30 Exercised (3,002) $ 36.78 Forfeited/Expired (202) $ 59.70 Outstanding at Dec 31, 2020 20,252 $ 47.44 Remaining contractual life in years 4.63 Aggregate intrinsic value in millions $ 209 Exercisable at Dec 31, 2020 16,564 $ 46.11 Remaining contractual life in years 3.76 Aggregate intrinsic value in millions $ 192 1. Weighted-average per share. Additional Information about Stock Options In millions, except per share amounts 2020 2019 2018 Weighted-average fair value per share of options granted $ 5.89 $ 7.99 $ 15.38 Total compensation expense for stock option plans $ 22 $ 23 $ 68 Related tax benefit $ 5 $ 5 $ 15 Total amount of cash received from the exercise of options $ 108 $ 93 $ 112 Total intrinsic value of options exercised 1 $ 41 $ 77 $ 160 Related tax benefit $ 9 $ 17 $ 36 1. Difference between the market price at exercise and the price paid by the employee to exercise the options.
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Nonvested Restricted Stock Units Activity	The Company grants RSUs to certain employees and non-employee directors. The grants vest after a designated period of time, generally three years for employees and two years for non-employee directors. The following table shows changes in nonvested RSUs: RSU Awards 2020 Shares in thousands Shares Grant Date Fair Value 1 Nonvested at Jan 1, 2020 2,454 $ 59.98 Granted 2,065 $ 47.66 Vested (1,422) $ 55.53 Canceled (90) $ 54.69 Nonvested at Dec 31, 2020 3,007 $ 53.78 1. Weighted-average per share.
Schedule of Additional Information About Deferred Restricted Stock Units	Additional Information about RSUs In millions, except per share amounts 2020 2019 2018 Weighted-average fair value per share of RSUs granted $ 47.66 $ 54.78 $ 71.46 Total fair value of RSUs vested 1 $ 106 $ 264 $ 382 Related tax benefit $ 24 $ 59 $ 86 Total compensation expense for RSU awards $ 93 $ 110 $ 144 Related tax benefit $ 21 $ 25 $ 32 1. Includes the fair value of shares vested in prior years and delivered in the reporting year.
Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	The following table shows the PSU awards granted: PSU Awards Target Shares Granted 1 Grant Date Fair Value 2 Shares in thousands Year Performance Period 2020 Jan 1, 2020 – Dec 31, 2022 1,426 $ 48.35 2019 Apr 1, 2019 – Dec 31, 2021 1,173 $ 57.58 2017 Sep 1, 2017 – Aug 31, 2019 232 $ 71.16 2017 3 Jan 1, 2017 – Dec 31, 2019 1,728 $ 81.99 1. At the end of the performance period, the actual number of shares issued can range from zero to 200 percent of target shares granted. 2. Weighted-average per share. 3. Converted to RSUs as a result of the Merger.
Share-based Payment Arrangement, Performance Shares, Activity	The following table shows changes in nonvested PSUs: PSUs 2020 Shares in thousands Shares Grant Date Fair Value 1 Nonvested at Jan 1, 2020 1,121 $ 57.58 Granted 1,426 $ 48.35 Vested — $ — Canceled (59) $ 53.09 Nonvested at Dec 31, 2020 2,488 $ 53.78 1. Weighted-average per share.
Schedule of Additional Information About Performance Deferred Stock	Additional Information about PSUs In millions, except share amounts 2020 2019 2018 Total fair value of PSUs vested and delivered 1 $ — $ 18 $ — Related tax benefit $ — $ 4 $ — Total compensation expense for PSU awards $ 56 $ 25 $ 12 Related tax benefit $ 13 $ 6 $ 3 Shares of PSUs settled in cash (in thousands) 2 — 162 — Total cash paid to settle PSUs 3 $ — $ 13 $ — 1. Includes the fair value of shares vested in prior years and delivered in the reporting year. 2. PSU awards vested in prior years and delivered in the reporting year.

FINANCIAL INSTRUMENTS_2

FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2020
Investments, All Other Investments [Abstract]
Fair Value of Financial Instruments	The following table summarizes the fair value of financial instruments at December 31, 2020 and 2019: Fair Value of Financial Instruments at Dec 31 2020 2019 In millions Cost Gain Loss Fair Value Cost Gain Loss Fair Value Cash equivalents: Held-to-maturity securities 1 $ 980 $ — $ — $ 980 $ 220 $ — $ — $ 220 Money market funds 484 — — 484 408 — — 408 Total cash equivalents $ 1,464 $ — $ — $ 1,464 $ 628 $ — $ — $ 628 Marketable securities 2 $ 45 $ — $ — $ 45 $ 21 $ — $ — $ 21 Other investments: Debt securities: Government debt 3 $ 673 $ 35 $ (10) $ 698 $ 533 $ 33 $ (11) $ 555 Corporate bonds 822 119 (5) 936 944 80 (10) 1,014 Total debt securities $ 1,495 $ 154 $ (15) $ 1,634 $ 1,477 $ 113 $ (21) $ 1,569 Equity securities 4 6 34 — 40 10 6 (1) 15 Total other investments $ 1,501 $ 188 $ (15) $ 1,674 $ 1,487 $ 119 $ (22) $ 1,584 Total cash equivalents, marketable securities and other investments $ 3,010 $ 188 $ (15) $ 3,183 $ 2,136 $ 119 $ (22) $ 2,233 Long-term debt including debt due within one year 5 $ (16,951) $ 6 $ (3,659) $ (20,604) $ (16,410) $ 7 $ (2,258) $ (18,661) Derivatives relating to: Interest rates 6 $ — $ 41 $ (182) $ (141) $ — $ 8 $ (283) $ (275) Foreign currency — 69 (84) (15) — 101 (21) 80 Commodities 6 — 63 (84) (21) — 59 (115) (56) Total derivatives $ — $ 173 $ (350) $ (177) $ — $ 168 $ (419) $ (251) 1. The Company's held-to-maturity securities primarily included treasury bills and time deposits. 2. The Company's investments in marketable securities are included in "Other current assets" in the consolidated balance sheets. 3. U.S. Treasury obligations, U.S. agency obligations, U.S. agency mortgage-backed securities and other municipalities’ obligations. 4. Equity securities with a readily determinable fair value. 5. Cost includes fair value hedge adjustment gains of $69 million at December 31, 2020 and losses of $1 million at December 31, 2019 on $3,314 million of debt at December 31, 2020 and $3,490 million of debt at December 31, 2019.
Investing Results	The following table provides the investing results from available-for-sale securities for the years ended December 31, 2020, 2019 and 2018. Investing Results In millions 2020 2019 2018 Proceeds from sales of available-for-sale securities $ 837 $ 1,138 $ 1,053 Gross realized gains $ 94 $ 51 $ 21 Gross realized losses $ 40 $ 18 $ 30
Contractual Maturities of Debt Securities	The following table summarizes the contractual maturities of the Company’s investments in debt securities: Contractual Maturities of Debt Securities at Dec 31, 2020 1 Cost Fair In millions Within one year $ 25 $ 25 One to five years 406 448 Six to ten years 649 685 After ten years 415 476 Total $ 1,495 $ 1,634 1. Includes marketable securities with maturities of less than one year.
Fair Value and Gross Unrealized Losses of Investments Temporarily Impaired	The following table provides the fair value and gross unrealized losses of the Company’s investments in debt securities that were deemed to be temporarily impaired at December 31, 2020 and 2019, aggregated by investment category: Temporarily Impaired Debt Securities at Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Value Unrealized Losses In millions 2020 Government debt 1 $ 124 $ (3) $ 7 $ (7) $ 131 $ (10) Corporate bonds 55 (3) 12 (2) 67 (5) Total temporarily impaired debt securities $ 179 $ (6) $ 19 $ (9) $ 198 $ (15) 2019 Government debt 1 $ 55 $ (3) $ 23 $ (8) $ 78 $ (11) Corporate bonds 79 (3) 52 (7) 131 (10) Total temporarily impaired debt securities $ 134 $ (6) $ 75 $ (15) $ 209 $ (21) 1. U.S. Treasury obligations, U.S. agency obligations, U.S. agency mortgage-backed securities and other municipalities' obligations.
Equity Securities with and without Readily Determinable Fair Value	Investments in Equity Securities Dec 31, 2020 Dec 31, 2019 In millions Readily determinable fair value $ 40 $ 15 Not readily determinable fair value $ 215 $ 189
Schedule of Notional Amounts of Outstanding Derivative Positions	The notional amounts of the Company's derivative instruments presented on a net basis at December 31, 2020 and 2019, were as follows: Notional Amounts - Net Dec 31, 2020 Dec 31, 2019 In millions Derivatives designated as hedging instruments Interest rate contracts $ 612 $ 922 Foreign currency contracts $ 3,784 $ 6,253 Derivatives not designated as hedging instruments Interest rate contracts $ 94 $ 145 Foreign currency contracts $ 9,187 $ 5,567 The notional amounts of the Company's commodity derivatives presented on a net basis at December 31, 2020 and 2019, were as follows: Commodity Notionals - Net Dec 31, 2020 Dec 31, 2019 Notional Volume Unit Derivatives designated as hedging instruments Hydrocarbon derivatives 10.9 6.1 million barrels of oil equivalent Derivatives not designated as hedging instruments Hydrocarbon derivatives — 0.1 million barrels of oil equivalent Power derivatives — 87.5 thousands of megawatt hours
Schedule of Derivative Instruments	Maturity Dates of Derivatives Designated as Hedging Instruments Year Interest rate contracts 2021 Foreign currency contracts 2021 Commodity contracts 2022
Schedule Fair Values of Derivative Instruments	The following tables provide the fair value and balance sheet classification of derivative instruments at December 31, 2020 and 2019: Fair Value of Derivative Instruments Dec 31, 2020 In millions Balance Sheet Classification Gross Counterparty and Cash Collateral Netting 1 Net Amounts Included in the Consolidated Balance Sheets Asset derivatives Derivatives designated as hedging instruments Interest rate contracts Other current assets $ 3 $ (3) $ — Foreign currency contracts Other current assets 39 (19) 20 Commodity contracts Other current assets 146 (109) 37 Commodity contracts Deferred charges and other assets 31 (8) 23 Total $ 219 $ (139) $ 80 Derivatives not designated as hedging instruments Interest rate contracts Deferred charges and other assets $ 41 $ — $ 41 Foreign currency contracts Other current assets 74 (25) 49 Commodity contracts Other current assets 4 (1) 3 Total $ 119 $ (26) $ 93 Total asset derivatives $ 338 $ (165) $ 173 Liability derivatives Derivatives designated as hedging instruments Interest rate contracts Accrued and other current liabilities $ 7 $ (3) $ 4 Foreign currency contracts Accrued and other current liabilities 93 (19) 74 Commodity contracts Accrued and other current liabilities 151 (112) 39 Commodity contracts Other noncurrent obligations 48 (9) 39 Total $ 299 $ (143) $ 156 Derivatives not designated as hedging instruments Interest rate contracts Other noncurrent obligations $ 178 $ — $ 178 Foreign currency contracts Accrued and other current liabilities 35 (25) 10 Commodity contracts Accrued and other current liabilities 9 (3) 6 Total $ 222 $ (28) $ 194 Total liability derivatives $ 521 $ (171) $ 350 1. Counterparty and cash collateral amounts represent the estimated net settlement amount when applying netting and set-off rights included in master netting arrangements between the Company and its counterparties and the payable or receivable for cash collateral held or placed with the same counterparty. Fair Value of Derivative Instruments Dec 31, 2019 In millions Balance Sheet Classification Gross Counterparty and Cash Collateral Netting 1 Net Amounts Included in the Consolidated Balance Sheets Asset derivatives Derivatives designated as hedging instruments Interest rate contracts Other current assets $ 21 $ (13) $ 8 Foreign currency contracts Other current assets 105 (36) 69 Commodity contracts Other current assets 44 (25) 19 Commodity contracts Deferred charges and other assets 28 (3) 25 Total $ 198 $ (77) $ 121 Derivatives not designated as hedging instruments Interest rate contracts Other current assets $ 14 $ (14) $ — Foreign currency contracts Other current assets 44 (12) 32 Commodity contracts Other current assets 18 (3) 15 Total $ 76 $ (29) $ 47 Total asset derivatives $ 274 $ (106) $ 168 Liability derivatives Derivatives designated as hedging instruments Interest rate contracts Accrued and other current liabilities $ 23 $ (13) $ 10 Interest rate contracts Other noncurrent obligations 1 — 1 Foreign currency contracts Accrued and other current liabilities 46 (36) 10 Commodity contracts Accrued and other current liabilities 95 (29) 66 Commodity contracts Other noncurrent obligations 38 (4) 34 Total $ 203 $ (82) $ 121 Derivatives not designated as hedging instruments Interest rate contracts Accrued and other current liabilities $ 136 $ (14) $ 122 Interest rate contracts Other noncurrent obligations 150 — 150 Foreign currency contracts Accrued and other current liabilities 23 (12) 11 Commodity contracts Accrued and other current liabilities 17 (3) 14 Commodity contracts Other noncurrent obligations 1 — 1 Total $ 327 $ (29) $ 298 Total liability derivatives $ 530 $ (111) $ 419
Derivative Instruments, Gain (Loss)	The following table summarizes the gain (loss) of derivative instruments in the consolidated statements of income and comprehensive income for the years ended December 31, 2020, 2019 and 2018: Effect of Derivative Instruments Amount of gain (loss) recognized in OCI 1 Amount of gain (loss) recognized in income 2 Income Statement Classification In millions 2020 2019 2018 2020 2019 2018 Derivatives designated as hedging instruments: Fair value hedges: Interest rate contracts $ — $ — $ — $ 69 $ 17 $ — Interest expense and amortization of debt discount 3 Excluded components 4 7 (3) — — — — Interest expense and amortization of debt discount Cash flow hedges: Interest rate contracts — (316) 26 (2) 1 (3) Interest expense and amortization of debt discount Foreign currency contracts (20) 16 19 3 28 (18) Cost of sales Foreign currency contracts — 10 (3) — 8 — Sundry income (expense) - net Commodity contracts (8) (6) (46) (31) (81) (69) Cost of sales Net foreign investment hedges: Foreign currency contracts (38) (52) 116 — — — Excluded components 4 27 162 — 20 99 — Sundry income (expense) - net Total derivatives designated as hedging instruments $ (32) $ (189) $ 112 $ 59 $ 72 $ (90) Derivatives not designated as hedging instruments: Interest rate contracts $ — $ — $ — $ (16) $ (4) $ — Interest expense and amortization of debt discount Foreign currency contracts — — — 28 45 101 Sundry income (expense) - net Commodity contracts — — — 11 (28) (12) Cost of sales Total derivatives not designated as hedging instruments $ — $ — $ — $ 23 $ 13 $ 89 Total derivatives $ (32) $ (189) $ 112 $ 82 $ 85 $ (1) 1. OCI is defined as other comprehensive income (loss). 2. Pretax amounts. 3. Gain (loss) recognized in income of derivatives is offset by gain (loss) recognized in income of the hedged item. 4. The excluded components are related to the time value of the derivatives designated as hedges.
Schedule of Hedging Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized Over Next Fiscal Year [Table Text Block]	The following table provides the net after-tax amounts to be reclassified from AOCL to income within the next 12 months: Expected Reclassifications from AOCL within the next 12 months Dec 31, Cash flow hedges: Interest rate contracts $ (8) Commodity contracts $ (1) Foreign currency contracts $ (18) Net foreign investment hedges: Excluded components $ 2

FAIR VALUE MEASUREMENTS_2

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table summarizes the bases used to measure certain assets and liabilities at fair value on a recurring basis: Basis of Fair Value Measurements on a Recurring Basis Dec 31, 2020 Dec 31, 2019 In millions Level 1 Level 2 Total Level 1 Level 2 Total Assets at fair value: Cash equivalents: Held-to-maturity securities 1 $ — $ 980 $ 980 $ — $ 220 $ 220 Money market funds — 484 484 — 408 408 Marketable securities 2 — 45 45 — 21 21 Equity securities 3 40 — 40 15 — 15 Debt securities: 3 Government debt 4 — 698 698 — 555 555 Corporate bonds 28 908 936 22 992 1,014 Derivatives relating to: 5 Interest rates — 44 44 — 35 35 Foreign currency — 113 113 — 149 149 Commodities 8 173 181 23 67 90 Total assets at fair value $ 76 $ 3,445 $ 3,521 $ 60 $ 2,447 $ 2,507 Liabilities at fair value: Long-term debt including debt due within one year 6 $ — $ 20,604 $ 20,604 $ — $ 18,661 $ 18,661 Derivatives relating to: 5 Interest rates — 185 185 — 310 310 Foreign currency — 128 128 — 69 69 Commodities 7 201 208 14 137 151 Total liabilities at fair value $ 7 $ 21,118 $ 21,125 $ 14 $ 19,177 $ 19,191 1. The Company's held-to-maturity securities primarily included treasury bills and time deposits. 2. The Company's investments in marketable securities are included in "Other current assets" in the consolidated balance sheets. 3. The Company's investments in debt securities, which are primarily available-for-sale, and equity securities are included in "Other investments" in the consolidated balance sheets. 4. U.S. Treasury obligations, U.S. agency obligations, U.S. agency mortgage-backed securities and other municipalities' obligations. 5. See Note 22 for the classification of derivatives in the consolidated balance sheets.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following table summarizes the changes in fair value measurements using Level 3 inputs for the year ended December 31, 2018: Fair Value Measurements Using Level 3 Inputs for Interests Held in Trade Accounts Receivable Conduits 2018 In millions Balance at Jan 1 $ 677 Gain (loss) included in earnings 1 3 Settlements 2 (680) Balance at Dec 31 $ — 1. Included in "Selling, general and administrative expenses" in the consolidated statements of income.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis	The following table summarizes the bases used to measure certain assets at fair value on a nonrecurring basis in the consolidated balance sheets in 2020, 2019 and 2018: Basis of Fair Value Measurements on a Nonrecurring Basis at Dec 31 (Level 3) Total Losses In millions 2020 Assets at fair value: Long-lived assets and other assets $ 121 $ (245) 2019 Assets at fair value: Long-lived assets, other assets and equity method investments $ 162 $ (2,031) Goodwill $ — $ (1,039) 2018 Assets at fair value: Long-lived assets and other assets $ — $ (67)

VARIABLE INTEREST ENTITIES_2

VARIABLE INTEREST ENTITIES	12 Months Ended
	Dec. 31, 2020
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the carrying amounts of these entities’ assets and liabilities included in the Company’s consolidated balance sheets at December 31, 2020 and 2019: Assets and Liabilities of Consolidated VIEs at Dec 31 In millions 2020 2019 Cash and cash equivalents $ 26 $ 37 Other current assets 44 51 Net property 232 330 Other noncurrent assets 17 18 Total assets 1 $ 319 $ 436 Current liabilities $ 73 $ 141 Long-term debt 6 34 Other noncurrent obligations 18 21 Total liabilities 2 $ 97 $ 196 1. All assets were restricted at December 31, 2020 and 2019. 2. All liabilities were nonrecourse at December 31, 2020 and 2019.

RELATED PARTY TRANSACTIONS_2

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Balances Due To or Due From Nonconsolidated Affiliates	Balances due to or due from nonconsolidated affiliates at December 31, 2020 and 2019 were as follows: Balances Due To or Due From Nonconsolidated Affiliates at Dec 31 2020 2019 In millions Accounts and notes receivable - Other $ 229 $ 211 Accounts payable - Other $ 1,075 $ 1,092	The following table presents revenue earned and expenses incurred related to transactions with Historical DuPont and its affiliates: Sales to Historical DuPont and its Affiliates 2019 2018 In millions Net sales $ 12 $ 55 Cost of sales $ 9 $ 42

SEGMENTS AND GEOGRAPHIC REGIO_2

SEGMENTS AND GEOGRAPHIC REGIONS	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	Sales are attributed to geographic region based on customer location; long-lived assets are attributed to geographic region based on asset location. Geographic Region Information United EMEAI Rest of Total In millions 2020 Sales to external customers $ 12,547 $ 12,969 $ 13,026 $ 38,542 Long-lived assets $ 13,833 $ 2,813 $ 3,593 $ 20,239 2019 Sales to external customers $ 14,437 $ 14,612 $ 13,902 $ 42,951 Long-lived assets $ 14,571 $ 2,649 $ 3,776 $ 20,996 2018 Sales to external customers $ 16,613 $ 17,406 $ 15,585 $ 49,604 Long-lived assets $ 14,750 $ 2,657 $ 4,011 $ 21,418
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Segment Information Pack. & Spec. Plastics Ind. Interm. & Infrast. Perf. Materials & Coatings Corp. Total In millions 2020 Net sales $ 18,301 $ 12,021 $ 7,951 $ 269 $ 38,542 Restructuring and asset related charges - net 1 30 22 192 464 708 Equity in earnings (losses) of nonconsolidated affiliates 173 (166) 6 (31) (18) Operating EBIT 2 2,325 355 314 (279) 2,715 Depreciation and amortization 1,372 605 870 27 2,874 Total assets 30,069 12,220 13,915 5,266 61,470 Investments in nonconsolidated affiliates 661 531 108 27 1,327 Capital expenditures 678 268 306 — 1,252 2019 Net sales $ 20,245 $ 13,440 $ 8,923 $ 343 $ 42,951 Pro forma net sales 20,245 13,449 8,961 343 42,998 Restructuring, goodwill impairment and asset related charges - net 1 439 1,175 1,076 529 3,219 Equity in earnings (losses) of nonconsolidated affiliates 162 (241) 5 (20) (94) Pro forma Operating EBIT 3 2,904 845 918 (315) 4,352 Depreciation and amortization 1,435 594 877 32 2,938 Total assets 29,522 11,753 14,059 5,190 60,524 Investments in nonconsolidated affiliates 675 568 101 60 1,404 Capital expenditures 1,039 452 470 — 1,961 2018 Net sales $ 24,195 $ 15,447 $ 9,677 $ 285 $ 49,604 Pro forma net sales 24,237 15,465 9,865 285 49,852 Restructuring, goodwill impairment and asset related charges - net 1 46 11 21 143 221 Equity in earnings (losses) of nonconsolidated affiliates 287 284 4 (20) 555 Pro forma Operating EBIT 3 3,593 1,767 1,246 (370) 6,236 Depreciation and amortization 1,385 607 888 29 2,909 Total assets 4 30,279 14,092 16,050 3,378 63,799 Investments in nonconsolidated affiliates 1,278 1,850 99 93 3,320 Capital expenditures 1,231 433 427 — 2,091 1. See Note 6 for information regarding the Company's restructuring programs, goodwill impairment and other asset related charges. 2. Operating EBIT for TDCC in 2020 is substantially the same as that of Dow Inc. and therefore is not disclosed separately in the table above. A reconciliation of "Income from continuing operations, net of tax" to Operating EBIT is provided on the following page. 3. Pro forma Operating EBIT for TDCC in 2019 is substantially the same as that of Dow Inc. (same for 2018) and therefore is not disclosed separately in the table above. A reconciliation of "Income (loss) from continuing operations, net of tax" to pro forma Operating EBIT is provided on the following page. 4. Excludes assets of discontinued operations of $19,900 million.
Reconciliation of income from continuing operations, net of tax to Operating EBIT [Table Text Block]	Reconciliation of "Income from continuing operations, net of tax" to Operating EBIT 2020 In millions Income from continuing operations, net of tax $ 1,294 + Provision for income taxes on continuing operations 777 Income from continuing operations before income taxes $ 2,071 - Interest income 38 + Interest expense and amortization of debt discount 827 - Significant items 145 Operating EBIT $ 2,715 Reconciliation of "Income (loss) from continuing operations, net of tax" to Pro Forma Operating EBIT 2019 2018 In millions Income (loss) from continuing operations, net of tax $ (1,717) $ 2,940 + Provision for income taxes on continuing operations 470 809 Income (loss) from continuing operations before income taxes $ (1,247) $ 3,749 - Interest income 81 82 + Interest expense and amortization of debt discount 933 1,063 + Pro forma adjustments 1 65 180 - Significant items (4,682) (1,326) Pro forma Operating EBIT $ 4,352 $ 6,236 1. Pro forma adjustments include: (1) the margin impact of various manufacturing, supply and service related agreements entered into with DuPont and Corteva in connection with the separation which provide for different pricing than the historical intercompany and intracompany pricing practices of TDCC and Historical DuPont (included for 2019 and 2018 only), (2) the removal of the amortization of ECP's inventory step-up recognized in connection with the Merger and (3) the elimination of the impact of events directly attributable to the Merger, internal reorganization and business realignment, separation, distribution and other related transactions (e.g., one-time transaction costs).
Schedule of significant items [Table Text Block]	The following tables summarize the pretax impact of significant items by segment that are excluded from Operating EBIT and pro forma Operating EBIT: Significant Items by Segment for 2020 Pack. & Spec. Plastics Ind. Interm. & Infrast. Perf. Materials & Coatings Corp. Total In millions Integration and separation costs 1 $ — $ — $ — $ (239) $ (239) Restructuring and asset related charges - net 2 (30) (22) (192) (464) (708) Warranty accrual adjustment of exited business 3 — — — 11 11 Restructuring implementation costs 4 — — — (10) (10) Net gain on divestitures and asset sale 5 52 61 — 604 717 Litigation related charges, awards and adjustments 6 544 — — — 544 Loss on early extinguishment of debt 7 — — — (149) (149) Indemnification and other transaction related costs 8 — — — (21) (21) Total $ 566 $ 39 $ (192) $ (268) $ 145 1. Costs related to business separation activities. 2. Includes Board approved restructuring plans and asset-related charges, which include other asset impairments. See Note 6 for additional information. 3. Includes an adjustment to the warranty accrual of an exited business. 4. Includes costs associated with implementing the Company's 2020 Restructuring Program. 5. Primarily related to a gain on the sale of rail infrastructure in the U.S. and Canada and a gain on the sale of marine and terminal operations and assets in the U.S. See Notes 5 and 7 for additional information. 6. Includes recognition of gains associated with a legal matter with Nova. See Note 16 for additional information. 7. The Company retired outstanding long-term debt resulting in a loss on early extinguishment. See Note 15 for additional information. 8. Primarily related to charges associated with agreements entered into with DuPont and Corteva as part of the separation and distribution which, among other matters, provides for cross-indemnities and allocations of obligations and liabilities for periods prior to, at and after the completion of the separation. Significant Items by Segment for 2019 Pack. & Spec. Plastics Ind. Interm. & Infrast. Perf. Materials & Coatings Corp. Total In millions Integration and separation costs 1 $ — $ — $ — $ (1,013) $ (1,013) Restructuring, goodwill impairment and asset related charges - net 2 (439) (1,175) (1,076) (529) (3,219) Warranty accrual adjustment of exited business 3 — — — 39 39 Environmental charges 4 (5) (8) (50) (336) (399) Loss on divestitures 5 — (5) — (44) (49) Loss on early extinguishment of debt 6 — — — (102) (102) Litigation related charges, awards and adjustments 7 170 — — 35 205 Indemnification and other transaction related costs 8 — — — (144) (144) Total $ (274) $ (1,188) $ (1,126) $ (2,094) $ (4,682) 1. Costs related to post-Merger integration and business separation activities. Excludes one-time transaction costs directly attributable to the Merger. 2. Includes Board approved restructuring plans and asset related charges (see Note 6 for additional information); a charge related to Sadara (see Note 12 for additional information) and an impairment charge related to goodwill associated with the Coatings & Performance Monomers reporting unit (see Note 13 for additional information). 3. Includes an adjustment to the warranty accrual of an exited business. 4. Related to environmental remediation, primarily resulting from the culmination of long-standing negotiations with regulators and/or agencies and review of additional costs to manage ongoing remediation activities resulting from Dow’s separation from DowDuPont and related agreements with Corteva and DuPont. See Note 16 for additional information. 5. Includes post-closing adjustments on previous divestitures. 6. The Company retired outstanding long-term debt resulting in a loss on early extinguishment. See Note 15 for additional information. 7. Includes a gain associated with a legal matter with Nova, as well as a gain related to an adjustment of the Implant Liability and a charge related to the settlement of the Commercial Creditor matters. See Note 16 for additional information. 8. Includes charges primarily associated with agreements entered into with DuPont and Corteva as part of the separation and distribution which, among other matters, provides for cross-indemnities and allocations of obligations and liabilities for periods prior to, at and after the completion of the separation. Significant Items by Segment for 2018 Pack. & Spec. Plastics Ind. Interm. & Infrast. Perf. Materials & Coatings Corp. Total In millions Impact of Dow Silicones ownership restructure 1 $ — $ — $ (20) $ — $ (20) Integration and separation costs 2 — — — (1,074) (1,074) Restructuring and asset related charges - net 3 (46) (11) (21) (120) (198) Gain on divestiture 4 — 20 — — 20 Loss on early extinguishment of debt 5 — — — (54) (54) Total $ (46) $ 9 $ (41) $ (1,248) $ (1,326) 1. Includes a loss related to a post-closing adjustment related to the Dow Silicones ownership restructure. 2. Costs related to post-Merger integration and separation and distribution activities, and costs related to the Dow Silicones ownership restructure. 3. Includes Board approved restructuring plans and asset-related charges, which include other asset impairments. See Note 6 for additional information. 4. Includes a gain related to the Company's sale of its equity interest in MEGlobal. 5. The Company retired outstanding notes payable resulting in a loss on early extinguishment. See Note 15 for additional information.

SELECTED QUARTERLY FINANCIAL _2

SELECTED QUARTERLY FINANCIAL DATA	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	2020 In millions, except per share amounts (Unaudited) 1st 2nd 3rd 4th Year Dow Inc. Net sales $ 9,770 $ 8,354 $ 9,712 $ 10,706 $ 38,542 Cost of sales $ 8,230 $ 7,610 $ 8,371 $ 9,135 $ 33,346 Gross margin $ 1,540 $ 744 $ 1,341 $ 1,571 $ 5,196 Restructuring and asset related charges (credits) - net 1 $ 96 $ 6 $ 617 $ (11) $ 708 Integration and separation costs 2 $ 65 $ 46 $ 63 $ 65 $ 239 Net income (loss) 3 $ 258 $ (217) $ (1) $ 1,254 $ 1,294 Net income (loss) attributable to Dow Inc. $ 239 $ (225) $ (25) $ 1,236 $ 1,225 Earnings (loss) per common share from continuing operations - basic 4 $ 0.32 $ (0.31) $ (0.04) $ 1.66 $ 1.64 Earnings (loss) per common share from continuing operations - diluted 4 $ 0.32 $ (0.31) $ (0.04) $ 1.65 $ 1.64 Dividends declared per share of common stock $ 0.70 $ 0.70 $ 0.70 $ 0.70 $ 2.80 Market price range of common stock: High $ 53.75 $ 45.90 $ 51.07 $ 57.73 $ 57.73 Low $ 22.00 $ 27.04 $ 39.44 $ 45.18 $ 22.00 TDCC Net sales $ 9,770 $ 8,354 $ 9,712 $ 10,706 $ 38,542 Cost of sales $ 8,230 $ 7,608 $ 8,371 $ 9,134 $ 33,343 Gross margin $ 1,540 $ 746 $ 1,341 $ 1,572 $ 5,199 Restructuring and asset related charges (credits) - net 1 $ 96 $ 6 $ 617 $ (11) $ 708 Integration and separation costs 2 $ 65 $ 46 $ 63 $ 65 $ 239 Net income (loss) 3 $ 258 $ (217) $ (1) $ 1,264 $ 1,304 Net income (loss) attributable to The Dow Chemical Company $ 239 $ (225) $ (25) $ 1,246 $ 1,235 1. See Note 6 for additional information. 2. See Note 3 for additional information. 3. See Notes 5, 7, 15 and 16 for information on additional items materially impacting "Net income (loss)." The fourth quarter of 2020 includes a gain related to the sale of marine and terminal operations and assets and a gain associated with a legal matter with Nova. The third quarter of 2020 includes a gain related to the sale of rail infrastructure operations and assets and a loss on the early extinguishment of debt. The first quarter of 2020 includes a loss on the early extinguishment of debt. 4. Earnings per common share amounts relate only to Dow Inc. as TDCC common shares are not publicly traded and are all owned by Dow Inc. Due to quarterly changes in the share count and the allocation of income to participating securities, the sum of the four quarters does not equal the earnings per share amount calculated for the year.	2019 In millions, except per share amounts (Unaudited) 1st 2nd 3rd 4th Year Dow Inc. Net sales $ 10,969 $ 11,014 $ 10,764 $ 10,204 $ 42,951 Cost of sales $ 9,142 $ 9,420 $ 9,377 $ 8,718 $ 36,657 Gross margin $ 1,827 $ 1,594 $ 1,387 $ 1,486 $ 6,294 Restructuring, goodwill impairment and asset related charges - net 1 $ 156 $ 65 $ 147 $ 2,851 $ 3,219 Integration and separation costs 2 $ 452 $ 348 $ 164 $ 99 $ 1,063 Income (loss) from continuing operations, net of tax $ 156 $ 90 $ 347 $ (2,310) $ (1,717) Income from discontinued operations net of tax $ 445 $ — $ — $ — $ 445 Net income (loss) 3 $ 601 $ 90 $ 347 $ (2,310) $ (1,272) Net income (loss) attributable to Dow Inc. $ 556 $ 75 $ 333 $ (2,323) $ (1,359) Earnings (loss) per common share from continuing operations - basic 4 $ 0.16 $ 0.10 $ 0.45 $ (3.14) $ (2.42) Earnings (loss) per common share from continuing operations - diluted 4 $ 0.16 $ 0.10 $ 0.45 $ (3.14) $ (2.42) Dividends declared per share of common stock 5 N/A $ 0.70 $ 0.70 $ 0.70 $ 2.10 Market price range of common stock: High 5 N/A $ 59.71 $ 52.79 $ 55.99 $ 59.71 Low 5 N/A $ 46.76 $ 40.71 $ 43.85 $ 40.71 TDCC Net sales $ 10,969 $ 11,014 $ 10,764 $ 10,204 $ 42,951 Cost of sales $ 9,142 $ 9,419 $ 9,377 $ 8,719 $ 36,657 Gross margin $ 1,827 $ 1,595 $ 1,387 $ 1,485 $ 6,294 Restructuring, goodwill impairment and asset related charges - net 1 $ 156 $ 65 $ 147 $ 2,851 $ 3,219 Integration and separation costs 2 $ 452 $ 324 $ 164 $ 99 $ 1,039 Income (loss) from continuing operations, net of tax $ 156 $ 217 $ 324 $ (2,292) $ (1,595) Income from discontinued operations net of tax $ 445 $ — $ — $ — $ 445 Net income (loss) 3 $ 601 $ 217 $ 324 $ (2,292) $ (1,150) Net income (loss) attributable to The Dow Chemical Company $ 556 $ 202 $ 310 $ (2,305) $ (1,237) 1. See Note 6 for additional information. 2. See Note 3 for additional information. 3. See Notes 3, 8, 15 and 16 for information on additional items materially impacting "Net income (loss)." The fourth quarter of 2019 included a gain related to the effects of Swiss tax reform and a loss on the early extinguishment of debt. The third quarter of 2019 included a charge related to environmental remediation, a charge related to the settlement of the Commercial Creditor matters, a gain related to an adjustment to the Implant Liability and a gain associated with a legal matter with Nova. The second quarter of 2019 included charges associated with agreements entered into with DuPont and Corteva as part of the separation from DowDuPont. 4. Earnings per common share amounts relate only to Dow Inc. as TDCC common shares are not publicly traded and are all owned by Dow Inc. Due to quarterly changes in the share count and the allocation of income to participating securities, the sum of the four quarters does not equal the earnings per share amount calculated for the year. 5. Dow Inc.'s common stock was solely owned by DowDuPont through March 31, 2019, and on April 1, 2019, Dow Inc. became an independent, publicly traded company.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative - USD ($) $ / shares in Units, $ in Millions	Jan. 01, 2019	Apr. 01, 2018	Jan. 01, 2018	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Percentage of LIFO Inventory				30.00%				32.00%				30.00%	32.00%
Percentage of FIFO Inventory				58.00%				58.00%				58.00%	58.00%
Percentage of Weighted Average Cost Inventory				12.00%				10.00%				12.00%	10.00%
Operating Lease, Right-of-Use Asset				$ 1,856				$ 2,072				$ 1,856	$ 2,072
Operating Lease, Liability				$ 1,937								$ 1,937
Dividends declared (in dollars per share)				$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 0.70		$ 2.80	$ 2.10	$ 0
Other current assets				$ 889				$ 679				$ 889	$ 679
Minimum
Useful life												3 years
Maximum
Useful life												20 years
Asset retirement obligations, estimated remaining useful life												10 years
The Dow Chemical Company
Marketable securities 2								0					0
Other current assets								592					592
The Dow Chemical Company | Previously Reported [Member]
Marketable securities 2								21					21
Other current assets								571					$ 571
Dow Inc. [Member]
Dividends declared (in dollars per share)												$ 2.80	$ 2.10
Marketable securities 2								0					$ 0
Other current assets								679					679
Dow Inc. [Member] | Previously Reported [Member]
Marketable securities 2								21					21
Other current assets								$ 658					$ 658
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset	$ 2,300
Stockholders' Equity, Period Increase (Decrease)											$ 32
Retained Earnings [Member]
Stockholders' Equity, Period Increase (Decrease)	$ 183	$ 1,057	$ 68
AOCI Attributable to Parent [Member]
Stockholders' Equity, Period Increase (Decrease)			$ 20

SEPARATION FROM DOWDUPONT Sep_2

SEPARATION FROM DOWDUPONT Separation from DowDuPont - USD ($) $ / shares in Units, $ in Millions	Apr. 01, 2019	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Common Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01
Common Stock, Shares, Issued		755,993,198	755,993,198	751,228,644
Transfer of Business Under Common Control			$ 0	$ (1,935)	$ 240
Dow Inc. [Member]
Common Stock, Par or Stated Value Per Share	$ 0.01			$ 0.01
Common Stock, Shares, Issued	748,771,240			100
Proceeds from Contributions from Parent	$ 2,024
DowDuPont
Common Stock, Par or Stated Value Per Share	$ 0.01
The Dow Chemical Company
Common Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01
Common Stock, Shares, Issued		100	100
Transfer of Business Under Common Control			$ 0	$ 61	240
Retained Earnings [Member]
Transfer of Business Under Common Control		$ 177	177	(14,806)	(182)
Retained Earnings [Member] | The Dow Chemical Company
Transfer of Business Under Common Control			$ 0	$ (16,009)	$ (182)

SEPARATION FROM DOWDUPONT Disco

SEPARATION FROM DOWDUPONT Discontinued Operations - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 10,706	$ 9,712	$ 8,354	$ 9,770	$ 10,204	$ 10,764	$ 11,014	$ 10,969	$ 38,542	$ 42,951	$ 49,604
Cost of sales	9,135	8,371	7,610	8,230	8,718	9,377	9,420	9,142	33,346	36,657	41,074
Research and development expenses									768	765	800
Selling, general and administrative expenses									1,471	1,590	1,782
Amortization of intangibles									401	419	469
Restructuring, goodwill impairment and asset related charges - net	$ (11)	$ 617	$ 6	$ 96	2,851	147	65	156	708	3,219	221
Equity in earnings (losses) of nonconsolidated affiliates									(18)	(94)	555
Sundry income (expense) - net									1,269	461	96
Interest income									38	81	82
Interest expense and amortization of debt discount									827	933	1,063
Provision for income taxes on continuing operations									777	470	809
Income from discontinued operations, net of tax					$ 0	$ 0	$ 0	445	$ 0	$ 445	1,835
Discontinued Operations [Member]
Income Statement [Abstract]
Net sales								2,953			12,187
Cost of sales								1,804			7,668
Research and development expenses								175			761
Selling, general and administrative expenses								262			1,108
Amortization of intangibles								61			249
Restructuring, goodwill impairment and asset related charges - net								78			411
Equity in earnings (losses) of nonconsolidated affiliates								28			400
Sundry income (expense) - net								(18)			(13)
Interest income								3			26
Interest expense and amortization of debt discount								7			56
Income (loss) from discontinued operations before income taxes								579			2,347
Provision for income taxes on continuing operations								134			512
Income from discontinued operations, net of tax								$ 445			$ 1,835

SEPARATION FROM DOWDUPONT Sep_3

SEPARATION FROM DOWDUPONT Separation and Distribution, Tax Matters and Other Agreements - USD ($) $ in Millions	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019
Charges related to separation, distribution and tax matters agreements										$ 21	$ 144
Deferred cash contribution													$ 400
Settlements and transfers related to separation from DowDuPont Inc.										0	(1,935)	$ 240
Cash payment related to divestiture									$ 215	18
Cash receipt related to divestiture									98
Business Combination, Integration And Separation Related Costs	$ 65	$ 63	$ 46	$ 65	$ 99	$ 164	$ 348	$ 452		239	1,063	1,179
Integration and separation costs [Member]
Charges related to separation, distribution and tax matters agreements									24
Sundry Income (Expense), Net
Charges related to separation, distribution and tax matters agreements									69
Other Current Assets [Member]
Indemnification asset	77				58				58	77	58
Other Noncurrent Assets [Member]
Indemnification asset	33				52				52	33	52
Accrued and Other Current Liabilities [Member]
Indemnification liability	412				352				352	412	352
Deferred cash contribution	103				130				130	103	130
Other Noncurrent Obligations
Indemnification liability	46				96				96	46	96
Deferred cash contribution	$ 96				$ 270				$ 270	96	270
Dow Inc. [Member]
Business Combination, Integration And Separation Related Costs											1,063
The Dow Chemical Company
Settlements and transfers related to separation from DowDuPont Inc.										0	61	240
Business Combination, Integration And Separation Related Costs										$ 239	$ 1,039	$ 1,179

REVENUE_2_3

REVENUE - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Revenues	$ 38,542	$ 42,951	$ 49,604
Contract with Customer, Liability, Revenue Recognized	145	145	205
Contract with Customer, Asset, Reclassified to Receivable	25	15
Trade (net of allowance for doubtful receivables - 2020: $51; 2019: $45)	4,839	4,844
Contract assets - current	58	41
Contract assets - noncurrent	11	4
Contract liabilities - current	349	193
Contract liabilities - noncurrent	1,915	1,607
U.S.& Canada [Member]
Revenue from External Customer [Line Items]
Revenues	13,582	15,549	17,809
Europe, Middle East, Africa and India
Revenue from External Customer [Line Items]
Revenues	12,969	14,612	17,406
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Revenues	8,165	8,676	9,404
Latin America [Member]
Revenue from External Customer [Line Items]
Revenues	3,826	4,114	4,985
Packaging & Specialty Plastics [Member] [Domain]
Revenue from External Customer [Line Items]
Revenues	18,301	20,245	24,195
Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	12,021	13,440	15,447
Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	7,951	8,923	9,677
Corporate Segment [Member]
Revenue from External Customer [Line Items]
Revenues	269	343	285
Hydrocarbons & Energy [Member] | Packaging & Specialty Plastics [Member] [Domain]
Revenue from External Customer [Line Items]
Revenues	4,271	5,357	7,587
Packaging and Specialty Plastics [Member] | Packaging & Specialty Plastics [Member] [Domain]
Revenue from External Customer [Line Items]
Revenues	14,030	14,888	16,608
Industrial Solutions [Member] | Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	3,929	4,310	4,812
Polyurethanes & Construction Chemicals | Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	8,080	9,117	10,615
Other [Member] | Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	12	13	20
Coatings and Performance Monomers [Member] | Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	3,258	3,517	3,979
Consumer Solutions [Member] | Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	$ 4,693	$ 5,406	$ 5,698
Maximum
Revenue from External Customer [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	21 years
Product
Revenue from External Customer [Line Items]
Revenue, Percentage from Products and Service Transferred to Customers	99.00%	98.00%	99.00%
Licensing of Technology
Revenue from External Customer [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 977	$ 826

DIVESTITURES_2

DIVESTITURES - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of property and businesses, net of cash divested	$ 929	$ 84	$ 47
Disposal Group, Including Discontinued Operation, Assets			19,900
Gain on disposal	717	(49)
Rail Infrastructure Operations and Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of property and businesses, net of cash divested	303
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	68
Disposal Group, Including Discontinued Operation, Goodwill	2
Gain on disposal	233
Marine and Terminal Operations and Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of property and businesses, net of cash divested	600
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	93
Disposal Group, Including Discontinued Operation, Goodwill	8
Gain on disposal	499
Packaging & Specialty Plastics [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal	52	0	0
Packaging & Specialty Plastics [Member] | Rail Infrastructure Operations and Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets	16
Gain on disposal	48
Packaging & Specialty Plastics [Member] | Marine and Terminal Operations and Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets	7
Gain on disposal	17
Industrial Intermediates & Infrastructure [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal	61	(5)	20
Industrial Intermediates & Infrastructure [Member] | Marine and Terminal Operations and Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets	17
Gain on disposal	61
Corporate Segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal	604	$ (44)	$ 0
Corporate Segment [Member] | Rail Infrastructure Operations and Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets	54
Gain on disposal	185
Corporate Segment [Member] | Marine and Terminal Operations and Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets	77
Gain on disposal	$ 421

RESTRUCTURING, GOODWILL IMPAI_3

RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET (2020 Restructuring Program)(Details) - USD ($) $ in Millions

3 Months Ended

6 Months Ended

12 Months Ended

Dec. 31, 2020

Sep. 30, 2020

Jun. 30, 2020

Mar. 31, 2020

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2020

Dec. 31, 2020

Dec. 31, 2019

Dec. 31, 2018

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

$ (11)

$ 617

$ 6

$ 96

$ 2,851

$ 147

$ 65

$ 156

$ 708

$ 3,219

$ 221

The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

708

3,219

221

Packaging & Specialty Plastics [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

30

439

46

Industrial Intermediates & Infrastructure [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

22

1,175

11

Performance Materials & Coatings [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

192

1,076

21

Corporate Segment [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

464

$ 529

$ 143

2020 Restructuring Program [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

575

$ 573

Charges against the reserve

(201)

(201)

Cash payments

(8)

(8)

Restructuring Reserve

364

364

364

2020 Restructuring Program [Member] | Accrued and Other Current Liabilities [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring Reserve

227

227

227

2020 Restructuring Program [Member] | Other Noncurrent Obligations

Restructuring Cost and Reserve [Line Items]

Restructuring Reserve

$ 137

$ 137

$ 137

2020 Restructuring Program [Member] | The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

restructuring and related cost, percentage

6.00%

6.00%

6.00%

Restructuring, goodwill impairment and asset related charges - net

$ 573

2020 Restructuring Program [Member] | Packaging & Specialty Plastics [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

$ 11

2020 Restructuring Program [Member] | Industrial Intermediates & Infrastructure [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

22

2020 Restructuring Program [Member] | Performance Materials & Coatings [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

177

2020 Restructuring Program [Member] | Corporate Segment [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

363

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

197

196

Charges against the reserve

(196)

Cash payments

0

Restructuring Reserve

0

0

$ 0

Restructuring Reserve, Accrual Adjustment

1

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

196

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | Packaging & Specialty Plastics [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

11

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | Packaging & Specialty Plastics [Member] | The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

11

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | Industrial Intermediates & Infrastructure [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

22

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | Industrial Intermediates & Infrastructure [Member] | The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

22

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | Performance Materials & Coatings [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

116

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | Performance Materials & Coatings [Member] | The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

116

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | Corporate Segment [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

47

2020 Restructuring Program [Member] | Asset Write-downs and Write-offs | Corporate Segment [Member] | The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

47

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

81

80

Charges against the reserve

(5)

(5)

Cash payments

0

0

Restructuring Reserve

75

75

75

Restructuring Reserve, Accrual Adjustment

1

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Contract Termination [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

19

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Environmental Remediation [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

56

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

80

80

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Packaging & Specialty Plastics [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

0

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Industrial Intermediates & Infrastructure [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

0

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Performance Materials & Coatings [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

61

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Performance Materials & Coatings [Member] | Contract Termination [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

9

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Performance Materials & Coatings [Member] | Environmental Remediation [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

52

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Corporate Segment [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

19

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Corporate Segment [Member] | Contract Termination [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

10

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Corporate Segment [Member] | Environmental Remediation [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

4

2020 Restructuring Program [Member] | Costs Associated with Exit and Disposal Activities | Corporate Segment [Member] | Pension Costs [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

5

2020 Restructuring Program [Member] | Severance and Related Benefit Costs

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

$ 297

Charges against the reserve

0

Cash payments

(8)

Restructuring Reserve

$ 289

289

$ 289

2020 Restructuring Program [Member] | Severance and Related Benefit Costs | The Dow Chemical Company

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

297

Cash payments

(8)

2020 Restructuring Program [Member] | Severance and Related Benefit Costs | Packaging & Specialty Plastics [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

0

2020 Restructuring Program [Member] | Severance and Related Benefit Costs | Industrial Intermediates & Infrastructure [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

0

2020 Restructuring Program [Member] | Severance and Related Benefit Costs | Performance Materials & Coatings [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

0

2020 Restructuring Program [Member] | Severance and Related Benefit Costs | Corporate Segment [Member]

Restructuring Cost and Reserve [Line Items]

Restructuring, goodwill impairment and asset related charges - net

$ 297

RESTRUCTURING, GOODWILL IMPAI_4

RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET (DowDuPont Cost Synergy Program) - USD ($) $ in Millions	3 Months Ended								12 Months Ended			40 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2017	Nov. 01, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net	$ (11)	$ 617	$ 6	$ 96	$ 2,851	$ 147	$ 65	$ 156	$ 708	$ 3,219	$ 221
The Dow Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									708	3,219	221
Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									192	1,076	21
Industrial Intermediates & Infrastructure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									22	1,175	11
Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									30	439	46
Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									464	529	143
DowDuPont Cost Synergy Program
Restructuring Cost and Reserve [Line Items]
Expected cost														$ 1,300
Restructuring, goodwill impairment and asset related charges - net									90	292	184	$ 961
Charges against the reserve									(4)	(143)	(33)
Cash payments									(123)	(295)	(209)
Restructuring Reserve	34				71				34	71	217	34	$ 275
DowDuPont Cost Synergy Program | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										28	7
DowDuPont Cost Synergy Program | Industrial Intermediates & Infrastructure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										7	11
DowDuPont Cost Synergy Program | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										1	13
DowDuPont Cost Synergy Program | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									90	256	153
DowDuPont Cost Synergy Program | Accrued and Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	21				52				21	52		21
DowDuPont Cost Synergy Program | Other Noncurrent Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	13				19				13	19		13
DowDuPont Cost Synergy Program | Property, Plant and Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											33
DowDuPont Cost Synergy Program | Severance and Related Benefit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									90	123	137	653
Charges against the reserve									(4)	0	0
Cash payments									(121)	(279)	(197)
Restructuring Reserve	19				54				19	54	210	19	270
DowDuPont Cost Synergy Program | Severance and Related Benefit Costs | The Dow Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									86
DowDuPont Cost Synergy Program | Severance and Related Benefit Costs | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										0	0
DowDuPont Cost Synergy Program | Severance and Related Benefit Costs | Industrial Intermediates & Infrastructure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										0	0
DowDuPont Cost Synergy Program | Severance and Related Benefit Costs | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										0	0
DowDuPont Cost Synergy Program | Severance and Related Benefit Costs | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									90	123	137
DowDuPont Cost Synergy Program | Severance and Related Benefit Costs | Minimum
Restructuring Cost and Reserve [Line Items]
Expected cost														525
DowDuPont Cost Synergy Program | Severance and Related Benefit Costs | Maximum
Restructuring Cost and Reserve [Line Items]
Expected cost														575
DowDuPont Cost Synergy Program | Asset Write-downs and Write-offs
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									0	143	33	263
Charges against the reserve									0	(143)	(33)
Cash payments									0	0	0
Restructuring Reserve	0				0				0	0	0	0	0
DowDuPont Cost Synergy Program | Asset Write-downs and Write-offs | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										28	7
DowDuPont Cost Synergy Program | Asset Write-downs and Write-offs | Industrial Intermediates & Infrastructure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										2	0
DowDuPont Cost Synergy Program | Asset Write-downs and Write-offs | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										0	10
DowDuPont Cost Synergy Program | Asset Write-downs and Write-offs | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									0	113	16
DowDuPont Cost Synergy Program | Asset Write-downs and Write-offs | Minimum
Restructuring Cost and Reserve [Line Items]
Expected cost														400
DowDuPont Cost Synergy Program | Asset Write-downs and Write-offs | Maximum
Restructuring Cost and Reserve [Line Items]
Expected cost														440
DowDuPont Cost Synergy Program | Costs Associated with Exit and Disposal Activities
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									0	26	14	45
Charges against the reserve									0	0	0
Cash payments									(2)	(16)	(12)
Restructuring Reserve	$ 15				$ 17				15	17	7	$ 15	$ 5
DowDuPont Cost Synergy Program | Costs Associated with Exit and Disposal Activities | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										0	0
DowDuPont Cost Synergy Program | Costs Associated with Exit and Disposal Activities | Industrial Intermediates & Infrastructure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										5	11
DowDuPont Cost Synergy Program | Costs Associated with Exit and Disposal Activities | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										1	3
DowDuPont Cost Synergy Program | Costs Associated with Exit and Disposal Activities | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									$ 0	$ 20	0
DowDuPont Cost Synergy Program | Costs Associated with Exit and Disposal Activities | Minimum
Restructuring Cost and Reserve [Line Items]
Expected cost														290
DowDuPont Cost Synergy Program | Costs Associated with Exit and Disposal Activities | Maximum
Restructuring Cost and Reserve [Line Items]
Expected cost														$ 310
DowDuPont Cost Synergy Program | Asset Related Charges and Other, Miscellaneous Asset Write-Down and Write-Offs
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											33
DowDuPont Cost Synergy Program | Asset Related Charges and Other, Miscellaneous Asset Write-Down and Write-Offs | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											7
DowDuPont Cost Synergy Program | Asset Related Charges and Other, Miscellaneous Asset Write-Down and Write-Offs | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											10
DowDuPont Cost Synergy Program | Asset Related Charges and Other, Miscellaneous Asset Write-Down and Write-Offs | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											$ 16

RESTRUCTURING, GOODWILL IMPAI_5

RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET (Goodwill Impairment and Asset Related Charges) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss										$ (1,039)
Asset Impairment Charges									$ 49
Restructuring, goodwill impairment and asset related charges - net	$ (11)	$ 617	$ 6	$ 96	$ 2,851	$ 147	$ 65	$ 156	708	3,219	$ 221
Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net					1,755					1,755
Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss					$ (1,039)					(1,039)
Restructuring, goodwill impairment and asset related charges - net									192	1,076	21
Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss										0
Restructuring, goodwill impairment and asset related charges - net									30	439	46
Packaging & Specialty Plastics [Member] | Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										370
Industrial Intermediates & Infrastructure [Member]
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss										0
Restructuring, goodwill impairment and asset related charges - net									22	1,175	11
Industrial Intermediates & Infrastructure [Member] | Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										1,168
Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									464	529	143
Corporate Segment [Member] | Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										217
Manufacturing Facility
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										58
Manufacturing Facility | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										9
Manufacturing Facility | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										44	$ 34
Manufacturing Facility | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										5
Fair Value, Measurements, Nonrecurring | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									15
Fair Value, Measurements, Nonrecurring | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									19
Fair Value, Measurements, Nonrecurring | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									15
Fair Value, Measurements, Nonrecurring | Manufacturing Facility | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									$ 19	44
Fair Value, Measurements, Nonrecurring | Manufacturing Assets
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										75
Fair Value, Measurements, Nonrecurring | Manufacturing Assets | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										24
Fair Value, Measurements, Nonrecurring | Manufacturing Assets | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										$ 51

SUPPLEMENTARY INFORMATION (Sund

SUPPLEMENTARY INFORMATION (Sundry Income, Net) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplementary Information [Line Items]
Non-operating pension and other postretirement benefit plan net credit					$ 103	$ 205	$ 123
Foreign exchange gains (losses)					(62)	91	(119)
Gain (loss) on divestiture					717	(49)
Loss on early extinguishment of debt					(149)	(102)	(54)
Gain (loss) related to litigation settlement					544	205
Gain (Loss) on Disposition of Other Assets					48	67	18
Charges related to separation, distribution and tax matters agreements					(21)	(144)
Other - net					84	113	128
Sundry income (expense) - net					1,269	461	96
Dow Silicones Corporation
Supplementary Information [Line Items]
Gain and post-close adjustments related to Dow Silicones ownership restructure					0	0	(20)
Commercial Creditors Litigation
Supplementary Information [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)					0	(50)	0
Dow V. Nova Chemicals Corporation Ethylene Asset Matter [Member] [Member]
Supplementary Information [Line Items]
Gain (loss) related to litigation settlement	$ 552		$ 18	$ 186
MEGlobal
Supplementary Information [Line Items]
Gain (loss) on divestiture							20
MEGlobal | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Supplementary Information [Line Items]
Gain (loss) on divestiture					0	0	20
Marine and Terminal Operations and Assets
Supplementary Information [Line Items]
Gain (loss) on divestiture					499
Nonoperating Income (Expense)
Supplementary Information [Line Items]
Gain (loss) on divestiture					(15)	(49)	0
Charges related to separation, distribution and tax matters agreements					(21)	(69)	0
Nonoperating Income (Expense) | Breast Implant and Other Products Liability Claims
Supplementary Information [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)					(5)	(85)	0
Nonoperating Income (Expense) | Dow V. Nova Chemicals Corporation Ethylene Asset Matter [Member] [Member]
Supplementary Information [Line Items]
Gain (loss) related to litigation settlement					544	170	0
Nonoperating Income (Expense) | Rail Infrastructure [Member]
Supplementary Information [Line Items]
Gain (loss) on divestiture					499	0	0
Nonoperating Income (Expense) | Marine and Terminal Operations and Assets
Supplementary Information [Line Items]
Gain (loss) on divestiture					233	0	0
Dow Silicones Corporation | Breast Implant and Other Products Liability Claims
Supplementary Information [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)		$ 98
Dow Silicones Corporation | Commercial Creditors Litigation
Supplementary Information [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)		$ (50)
The Dow Chemical Company
Supplementary Information [Line Items]
Non-operating pension and other postretirement benefit plan net credit					103	205	123
Foreign exchange gains (losses)					(65)	77	(119)
Loss on early extinguishment of debt					(149)	(102)	(54)
Gain (Loss) on Disposition of Other Assets					48	67	18
Other - net					82	113	128
Sundry income (expense) - net					1,274	573	96
The Dow Chemical Company | Dow Silicones Corporation
Supplementary Information [Line Items]
Gain and post-close adjustments related to Dow Silicones ownership restructure					0	0	(20)
The Dow Chemical Company | Commercial Creditors Litigation
Supplementary Information [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)					0	(50)	0
The Dow Chemical Company | MEGlobal | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Supplementary Information [Line Items]
Gain (loss) on divestiture					0	0	20
The Dow Chemical Company | Nonoperating Income (Expense)
Supplementary Information [Line Items]
Gain (loss) on divestiture					(15)	2	0
Charges related to separation, distribution and tax matters agreements					(11)	6	0
The Dow Chemical Company | Nonoperating Income (Expense) | Breast Implant and Other Products Liability Claims
Supplementary Information [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)					(5)	(85)	0
The Dow Chemical Company | Nonoperating Income (Expense) | Dow V. Nova Chemicals Corporation Ethylene Asset Matter [Member] [Member]
Supplementary Information [Line Items]
Gain (loss) related to litigation settlement					544	170	0
The Dow Chemical Company | Nonoperating Income (Expense) | Rail Infrastructure [Member]
Supplementary Information [Line Items]
Gain (loss) on divestiture					499	0	0
The Dow Chemical Company | Nonoperating Income (Expense) | Marine and Terminal Operations and Assets
Supplementary Information [Line Items]
Gain (loss) on divestiture					$ 233	$ 0	$ 0

SUPPLEMENTARY INFORMATION (Accr

SUPPLEMENTARY INFORMATION (Accrued and other current liabilities) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accrued and other current liabilities	$ 3,790	$ 2,762
Employee-related Liabilities, Current	866	284
The Dow Chemical Company
Accrued and other current liabilities	$ 3,256	$ 2,233

SUPPLEMENTARY INFORMATION (COLI

SUPPLEMENTARY INFORMATION (COLI) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Gross Life Insurance, Corporate or Bank Owned, Amount		$ 807	$ 820
Life Insurance, Corporate or Bank Owned, Amount		807	735
Monetization of Company-Owned Life Insurance	$ 211
COLI Monetization [Member]
Other Short-term Borrowings		$ 0	$ 85

SUPPLEMENTARY INFORMATION (Supp

SUPPLEMENTARY INFORMATION (Supplemental Cash Flow Information) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplementary Information [Abstract]
Interest , net of amounts capitalized	$ 842	$ 993	$ 1,143
Income taxes	$ 518	$ 881	$ 1,193

INCOME TAXES (Geographic Alloca

INCOME TAXES (Geographic Allocation of Income and Provision for Income Taxes) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income (loss) from continuing operations before income taxes
Domestic					$ (681)	$ (1,196)	$ 745
Foreign					2,752	(51)	3,004
Income (loss) from continuing operations before income taxes					2,071	(1,247)	3,749
Current tax expense (benefit)
Federal					(176)	(287)	324
State and local					4	25	13
Foreign					691	960	901
Total current tax expense					519	698	1,238
Deferred tax expense (benefit)
Federal					184	52	(318)
State and local					19	19	(32)
Foreign					55	(299)	(79)
Provision (Credit) for deferred income tax					258	(228)	(429)
Provision for income taxes on continuing operations					777	470	809
Income from continuing operations, net of tax	$ (2,310)	$ 347	$ 90	$ 156	$ 1,294	(1,717)	$ 2,940
Sadara Chemical Company
Income (loss) from portfolio actions included in Continuing Operations before Income Taxes, Domestic						1,800
Goodwill [Member]
Income (loss) from portfolio actions included in Continuing Operations before Income Taxes, Domestic						$ 1,400

INCOME TAXES (Reconciliation to

INCOME TAXES (Reconciliation to U.S. Statutory Rate)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Foreign income taxed at rates other than the statutory U.S. federal income tax rate	1.70%	(14.80%)	6.70%
Statutory U.S. federal income tax rate	21.00%	21.00%	21.00%
Equity earnings effect	0.20%	(3.20%)	(3.30%)
Foreign income taxed at rates other than the statutory U.S. federal income tax rate	1.70%	(14.80%)	6.70%
U.S. tax effect of foreign earnings and dividends	(3.90%)	(1.90%)	(0.70%)
Unrecognized tax benefits	3.30%	1.00%	0.20%
Acquisitions, divestitures and ownership restructuring activities	(5.10%)	0.00%	0.80%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	12.60%	0.00%	0.00%
Impact of tax reform 3	0	0.111	(0.034)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent	0.00%	10.40%	0.00%
State and local income taxes	0.30%	(4.40%)	0.40%
Other - net	(0.40%)	(13.70%)	(0.10%)
Effective tax rate	37.50%	(37.70%)	21.60%
Impact from interest and penalties, percent [Member]
Foreign income taxed at rates other than the statutory U.S. federal income tax rate	4.00%
Foreign income taxed at rates other than the statutory U.S. federal income tax rate	4.00%
Sadara Chemical Company
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent	0.00%	(29.50%)	0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent	0.00%	(29.50%)	0.00%
Goodwill [Member]
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent	0.00%	(17.50%)	0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent	0.00%	(17.50%)	0.00%

INCOME TAXES (Deferred Tax Bala

INCOME TAXES (Deferred Tax Balances) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Property, Plant and Equipment	$ 499	$ 494
Deferred Tax Liabilities, Property, Plant and Equipment	3,388	3,177
Deferred Tax Assets, Loss and Credit Carryforwards	2,004	1,920
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits	2,712	2,432
Deferred Tax Liabilities, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits	250	210
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other	1,507	1,678
Deferred Tax Liabilities, Deferred Expense, Reserves and Accruals, Other	43	43
Deferred Tax Assets, Goodwill and Intangible Assets	124	120
Deferred Tax Liabilities, Goodwill and Intangible Assets	638	688
Deferred Tax Assets, Inventory	30	28
Deferred Tax Liabilities, Inventory	198	234
Deferred Tax Assets, Investments	142	125
Deferred Tax Liabilities, Investments	51	48
Deferred Tax Assets, Other	858	851
Deferred Tax Liabilities, Other	196	120
Deferred Tax Assets, Gross	7,876	7,648
Deferred Tax Liabilities, Gross	4,764	4,520
Deferred Tax Assets, Valuation Allowance	(1,302)	(1,262)
Deferred Tax Assets, Net of Valuation Allowance	$ 6,574	$ 6,386

INCOME TAXES (Operating Loss an

INCOME TAXES (Operating Loss and Tax Credit Carryforwards) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 1,305	$ 1,396
Tax credit carryforwards	699	524
Total operating loss and tax credit carryforwards	2,004	1,920
Undistributed earnings of foreign subsidiaries	7,401	6,851
Expiring Within Five Years [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	274	263
Tax credit carryforwards	434	32
Expiring After Five Years or Having Indefinite Expiration [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1,031	1,133
Tax credit carryforwards	$ 265	$ 492

INCOME TAXES (Total Gross Unrec

INCOME TAXES (Total Gross Unrecognized Tax Benefits) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits	$ 319	$ 314	$ 255
Decreases related to positions taken on items from prior years	(1)	(1)	(8)
Increases related to positions taken on items from prior years	52	16	68
Increases related to positions taken in the current year	18	10	2
Settlement of uncertain tax positions with tax authorities	(14)	(19)	0
Decreases due to expiration of statutes of limitations	(1)	0	(1)
Foreign exchange gain	0	(1)	(2)
Unrecognized Tax Benefits	373	319	314
Total unrecognized tax benefits that, if recognized, would impact the effective tax rate	285	234	235
Total amount of interest and penalties expense (benefit) recognized in "Provision for income taxes on continuing operations"	84	(11)	(12)
Total accrual for interest and penalties recognized in the consolidated balance sheets	$ 144	$ 100	$ 109

INCOME TAXES Tax Sharing Agreem

INCOME TAXES Tax Sharing Agreement - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
DuPont Tax Sharing Agreement	$ 261	$ 312

INCOME TAXES (Additional Inform

INCOME TAXES (Additional Information) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2019
Income Tax Contingency [Line Items]
Coronavirus Aid, Relief, and Economic Security Act - Tax Loss Carryback	$ 291
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	260
Tax Cuts and Jobs Act, Change in Tax Rate, Income Tax Expense (Benefit)		$ 79
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense		(85)
Tax Cuts and Jobs Act, Income Tax Expense (Benefit)		$ 38
Non-Income Tax Contingencies Related To Issues In US And Foreign Locations
Income Tax Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 33		$ 44
ARGENTINA
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2014
BRAZIL
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2015
CANADA
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2012
CHINA
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2010
GERMANY
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2014
ITALY
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2016
NETHERLANDS
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2016
SWITZERLAND
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2016
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2004
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2004

EARNINGS PER SHARE Earnings Per

EARNINGS PER SHARE Earnings Per Share - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019
Income (loss) from continuing operations, net of tax					$ (2,310)	$ 347	$ 90	$ 156	$ 1,294	$ (1,717)	$ 2,940
Net income attributable to participating securities - continuing operations 1									(9)	(6)	0
Income (loss) from continuing operations attributable to common stockholders									1,216	(1,797)	2,838
Income from discontinued operations, net of tax					$ 0	$ 0	$ 0	$ 445	0	445	1,835
Income from discontinued operations attributable to common stockholders									0	432	1,803
Net income (loss) attributable to common stockholders									$ 1,216	$ (1,365)	$ 4,641
Earnings (loss) per common share from continuing operations - basic	$ 1.66	$ (0.04)	$ (0.31)	$ 0.32	$ (3.14)	$ 0.45	$ 0.10	$ 0.16	$ 1.64	$ (2.42)	$ 3.80
Earnings per common share from discontinued operations - basic									0	0.58	2.41
Earnings (loss) per common share - basic									1.64	(1.84)	6.21
Earnings (loss) per common share from continuing operations - diluted	$ 1.65	$ (0.04)	$ (0.31)	$ 0.32	$ (3.14)	$ 0.45	$ 0.10	$ 0.16	1.64	(2.42)	3.80
Earnings per common share from discontinued operations - diluted									0	0.58	2.41
Earnings (loss) per common share - diluted									$ 1.64	$ (1.84)	$ 6.21
Weighted-average common shares outstanding - basic									740.5	742.5	747.2
Weighted-average common shares outstanding - basic 2									1.8	0	0
Weighted-average common shares outstanding - diluted									742.3	742.5	747.2
Stock options and restricted stock units excluded from EPS calculations 4									14.2	20.8	0
Employee Stock Ownership Plan (ESOP), Shares in ESOP												4.6
Noncontrolling Interests
Net income attributable to noncontrolling interests - continuing operations									$ (69)	$ (74)	$ (102)
Net income attributable to noncontrolling interests - discontinued operations									$ 0	$ (13)	$ (32)
DowDuPont
Common Stock, Shares, Outstanding												2,246.3

INVENTORIES_2_3

INVENTORIES - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Finished goods	$ 3,140	$ 3,505
Work in process	996	1,122
Raw materials	598	628
Supplies	933	845
Total	5,667	6,100
Adjustment of inventories to the LIFO basis	34	114
Total inventories	$ 5,701	$ 6,214
Percentage of LIFO Inventory	30.00%	32.00%

PROPERTY (Schedule of Property)

PROPERTY (Schedule of Property) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total property	$ 56,325	$ 54,910
Depreciation expense	2,092	2,156	$ 2,174
Capitalized interest	64	80	$ 88
Land and land improvements
Property, Plant and Equipment [Line Items]
Total property	$ 2,011	2,177
Land and land improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	0 years
Land and land improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	25 years
Buildings
Property, Plant and Equipment [Line Items]
Total property	$ 4,976	4,742
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	5 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	50 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property	$ 42,108	40,651
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	25 years
Other property
Property, Plant and Equipment [Line Items]
Total property	$ 5,626	5,354
Other property | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3 years
Other property | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	50 years
Construction in progress 1
Property, Plant and Equipment [Line Items]
Total property	$ 1,604	$ 1,986

NONCONSOLIDATED AFFILIATES (Nar

NONCONSOLIDATED AFFILIATES (Narrative) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	$ 1,327				$ 1,404				$ 1,327	$ 1,404	$ 3,320
Other noncurrent obligations	(169)				(80)				(169)	(80)
Dividends from nonconsolidated affiliates									425	1,020	663
Restructuring, goodwill impairment and asset related charges - net	(11)	$ 617	$ 6	$ 96	2,851	$ 147	$ 65	$ 156	708	3,219	221
Packaging & Specialty Plastics [Member]
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	661				675				661	675	1,278
Restructuring, goodwill impairment and asset related charges - net									30	439	46
Industrial Intermediates & Infrastructure [Member]
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	531				568				531	568	1,850
Restructuring, goodwill impairment and asset related charges - net									22	1,175	11
Corporate Segment [Member]
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	27				60				27	60	93
Restructuring, goodwill impairment and asset related charges - net									464	529	$ 143
Exclusive of additional differences for EQUATE, Sadara and AFSI [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	55				51				55	51
Sadara Chemical Company
Schedule of Equity Method Investments [Line Items]
Other noncurrent obligations	(22)				0				(22)	0
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	$ 1,618				$ 1,705				$ 1,618	$ 1,705
Ownership percentage	35.00%				35.00%				35.00%	35.00%	35.00%
Restructuring, goodwill impairment and asset related charges - net					$ 1,755					$ 1,755
Equity Method Investment, Conversion of Notes Receivable to Equity										380	$ 382
Sadara Chemical Company | Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Increase (Decrease) in Notes Receivable, Related Parties									$ 333	473
Noncurrent receivables, Balance Due From Nonconsolidated Affiliates	$ 0				0				0	0
Sadara Chemical Company | Packaging & Specialty Plastics [Member]
Schedule of Equity Method Investments [Line Items]
Restructuring, goodwill impairment and asset related charges - net										370
Sadara Chemical Company | Industrial Intermediates & Infrastructure [Member]
Schedule of Equity Method Investments [Line Items]
Restructuring, goodwill impairment and asset related charges - net										1,168
Sadara Chemical Company | Corporate Segment [Member]
Schedule of Equity Method Investments [Line Items]
Restructuring, goodwill impairment and asset related charges - net										217
EQUATE Petrochemical Company K.S.C.
Schedule of Equity Method Investments [Line Items]
Other noncurrent obligations	(147)				(80)				(147)	(80)
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	$ 475				$ 489				$ 475	$ 489
Ownership percentage	42.50%				42.50%				42.50%	42.50%	42.50%
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity, Portion Amortized Over Remaining Useful Life	$ 155				$ 169				$ 155	$ 169
AgroFresh
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	0				35				0	35
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	$ 108				$ 102				$ 108	$ 102
Ownership percentage	40.00%				41.00%				40.00%	41.00%

NONCONSOLIDATED AFFILIATES (Imp

NONCONSOLIDATED AFFILIATES (Impact of Sales to Nonconsolidated Affiliates) - Equity Method Investee	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
MEGlobal | Customer Concentration Risk
Schedule of Equity Method Investments [Line Items]
Concentration Risk, Percentage	1.00%	1.00%	1.00%
MEGlobal | Customer Concentration Risk | Packaging & Specialty Plastics [Member]
Schedule of Equity Method Investments [Line Items]
Concentration Risk, Percentage	2.00%	1.00%	1.00%
MEGlobal | Customer Concentration Risk | Industrial Intermediates & Infrastructure [Member]
Schedule of Equity Method Investments [Line Items]
Concentration Risk, Percentage	1.00%	1.00%	2.00%
Sadara Chemical Company
Schedule of Equity Method Investments [Line Items]
Concentration Risk, Percentage	8.00%	8.00%	9.00%
SCG-Dow Group
Schedule of Equity Method Investments [Line Items]
Concentration Risk, Percentage	3.00%	2.00%	2.00%

NONCONSOLIDATED AFFILIATES (Bal

NONCONSOLIDATED AFFILIATES (Balances Due To or Due From Nonconsolidated Affiliates) - Equity Method Investee - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Accounts and notes receivable - Other	$ 229	$ 211
Accounts payable - Other	$ 1,075	$ 1,092

NONCONSOLIDATED AFFILIATES (Sch

NONCONSOLIDATED AFFILIATES (Schedule of the Company's Direct or Indirect Ownership Interest in Principal Nonconsolidated Affiliates) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)jointventures	Dec. 31, 2019USD ($)jointventures	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Interest, Number of Affiliates | jointventures	35	37
Investment in nonconsolidated affiliates	$ 1,327	$ 1,404	$ 3,320
Other noncurrent obligations	(169)	(80)
Net investment in principal nonconsolidated affiliates	1,158	1,324
Equity in earnings (losses) of nonconsolidated affiliates	(18)	(94)	555
Principal Nonconsolidated Affiliates
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	922	963
Other noncurrent obligations	(169)	(80)
Net investment in principal nonconsolidated affiliates	753	883
Equity in earnings (losses) of nonconsolidated affiliates	$ (16)	$ 21	$ 561
EQUATE Petrochemical Company K.S.C.
Schedule of Equity Method Investments [Line Items]
Ownership percentage	42.50%	42.50%	42.50%
Other noncurrent obligations	$ (147)	$ (80)
The Kuwait Olefins Company K.S.C.
Schedule of Equity Method Investments [Line Items]
Ownership percentage	42.50%	42.50%	42.50%
The Kuwait Styrene Company KSC
Schedule of Equity Method Investments [Line Items]
Ownership percentage	42.50%	42.50%	42.50%
Map Ta Phut Olefins Company
Schedule of Equity Method Investments [Line Items]
Ownership percentage	32.77%	32.77%	32.77%
Equity Method Investment, Ownership Percentage, Direct	20.27%
Equity Method Investment, Ownership Percentage, Indirect	12.50%
Sadara Chemical Company
Schedule of Equity Method Investments [Line Items]
Ownership percentage	35.00%	35.00%	35.00%
Other noncurrent obligations	$ (22)	$ 0
Siam Polyethylene Company Limited
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%	50.00%
Siam Polystyrene Company Limited
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%	50.00%
Siam Styrene Monomer Company Limited
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%	50.00%
Siam Synthetic Latex Company Limited
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%	50.00%

NONCONSOLIDATED AFFILIATES (Sum

NONCONSOLIDATED AFFILIATES (Summarized Financial Information) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Percent of principal nonconsolidated entities financial information which is presented									100.00%
Total current assets	$ 19,084				$ 16,815				$ 19,084	$ 16,815
Total Assets	61,470				60,524				61,470	60,524
Total current liabilities	11,108				10,679				11,108	10,679
Revenues									38,542	42,951	$ 49,604
Gross margin	1,571	$ 1,341	$ 744	$ 1,540	1,486	$ 1,387	$ 1,594	$ 1,827	5,196	6,294
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,254	$ (1)	$ (217)	$ 258	(2,310)	$ 347	$ 90	$ 601	1,294	(1,272)	4,775
Principal Nonconsolidated Affiliates
Schedule of Equity Method Investments [Line Items]
Total current assets	5,044				5,302				5,044	5,302
Assets, Noncurrent	25,298				26,477				25,298	26,477
Total Assets	30,342				31,779				30,342	31,779
Total current liabilities	3,942				3,743				3,942	3,743
Liabilities, Noncurrent	20,144				20,271				20,144	20,271
Liabilities	24,086				24,014				24,086	24,014
Noncontrolling interests	$ 132				$ 110				132	110
Revenues									9,470	10,905	14,461
Gross margin									619	644	2,320
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									$ (461)	$ (277)	$ 1,173

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule of Goodwill) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Net goodwill, beginning balance		$ 8,796	$ 9,846
Foreign currency impact		122	(10)
Goodwill, Impairment Loss			(1,039)
Goodwill, Other Increase (Decrease)			(1)
Net goodwill, ending balance	$ 8,796	8,908	8,796
Rail Infrastructure Operations and Assets [Member]
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		(2)
Marine and Terminal Operations and Assets
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		(8)
Packaging & Specialty Plastics [Member]
Goodwill [Roll Forward]
Net goodwill, beginning balance		5,109	5,101
Foreign currency impact		12	8
Goodwill, Impairment Loss			0
Goodwill, Other Increase (Decrease)			0
Net goodwill, ending balance	5,109	5,115	5,109
Packaging & Specialty Plastics [Member] | Rail Infrastructure Operations and Assets [Member]
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		(2)
Packaging & Specialty Plastics [Member] | Marine and Terminal Operations and Assets
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		(4)
Industrial Intermediates & Infrastructure [Member]
Goodwill [Roll Forward]
Net goodwill, beginning balance		1,100	1,095
Foreign currency impact		4	6
Goodwill, Impairment Loss			0
Goodwill, Other Increase (Decrease)			(1)
Net goodwill, ending balance	1,100	1,100	1,100
Industrial Intermediates & Infrastructure [Member] | Rail Infrastructure Operations and Assets [Member]
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		0
Industrial Intermediates & Infrastructure [Member] | Marine and Terminal Operations and Assets
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		(4)
Performance Materials & Coatings [Member]
Goodwill [Roll Forward]
Net goodwill, beginning balance		2,587	3,650
Foreign currency impact		106	(24)
Goodwill, Impairment Loss	(1,039)		(1,039)
Goodwill, Other Increase (Decrease)			0
Net goodwill, ending balance	$ 2,587	2,693	$ 2,587
Performance Materials & Coatings [Member] | Rail Infrastructure Operations and Assets [Member]
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		0
Performance Materials & Coatings [Member] | Marine and Terminal Operations and Assets
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		$ 0

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS (Annual Goodwill Impairment Test) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2020USD ($)ReportingUnits	Dec. 31, 2019USD ($)ReportingUnits	Dec. 31, 2018USD ($)ReportingUnits
Goodwill [Line Items]
Number of Reporting Units, Quantitative Testing | ReportingUnits		1	2	1
Goodwill, Impairment Loss			$ (1,039)
Goodwill	$ 8,796	$ 8,908	8,796	$ 9,846
Coatings and Performance Monomers
Goodwill [Line Items]
Goodwill	0		0
Industrial Intermediates & Infrastructure [Member]
Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss		309
Goodwill, Impairment Loss			0
Goodwill	1,100	1,100	1,100	1,095
Performance Materials & Coatings [Member]
Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss		2,530
Goodwill, Impairment Loss	(1,039)		(1,039)
Goodwill	$ 2,587	$ 2,693	$ 2,587	$ 3,650

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS (Other Intangible Assets) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 7,780	$ 7,642
Other Intangible Assets, Accumulated Amortization	(4,428)	(3,886)
Finite-Lived Intangible Assets, Net	3,352	3,756
Intangible Assets, Gross (Excluding Goodwill)	7,780	7,645
Other intangible assets	3,352	3,759
In-process research and development
Other Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	0	3
Indefinite-Lived Intangible Assets (Excluding Goodwill), Accumulated Amortization	0	0
Developed technology
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,638	2,634
Other Intangible Assets, Accumulated Amortization	(1,677)	(1,467)
Finite-Lived Intangible Assets, Net	961	1,167
Software
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,489	1,449
Other Intangible Assets, Accumulated Amortization	(989)	(893)
Finite-Lived Intangible Assets, Net	500	556
Trademarks/tradenames
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	352	352
Other Intangible Assets, Accumulated Amortization	(343)	(342)
Finite-Lived Intangible Assets, Net	9	10
Customer-related
Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	3,301	3,207
Other Intangible Assets, Accumulated Amortization	(1,419)	(1,184)
Finite-Lived Intangible Assets, Net	$ 1,882	$ 2,023

GOODWILL AND OTHER INTANGIBLE_6

GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule of Amortization Expense of Intangible Assets) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 401	$ 419	$ 469
Other intangible assets, excluding software
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	401	419	469
Software
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 96	$ 96	$ 93

(Schedule of Future Amortizatio

(Schedule of Future Amortization Expense of Intangible Assets) $ in Millions	Dec. 31, 2020USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2020	$ 477
2021	415
2022	384
2023	366
2024	$ 275

TRANSFERS OF FINANCIAL ASSETS (

TRANSFERS OF FINANCIAL ASSETS (Sale of Trade Accounts Receivable in North America and Europe) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Gain (Loss) on Sale of Accounts Receivable			$ (7)
Interests in conduits			$ 657
Accounts Receivable Facility, U.S. [Member]
Trade Accounts Receivable Eligible for Sale	$ 900
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers	0	$ 0
Accounts Receivable Facility, Europe [Member]
Trade Accounts Receivable Eligible for Sale	400
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers	$ 0	$ 0

NOTES PAYABLE, LONG-TERM DEBT_3

NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Schedule of Notes Payable) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Total notes payable	$ 156	$ 586
Year-end average interest rates	3.89%	6.30%
Commercial paper
Short-term Debt [Line Items]
Total notes payable	$ 0	$ 151
Notes payable to banks and other lenders
Short-term Debt [Line Items]
Total notes payable	$ 156	$ 435

NOTES PAYABLE, LONG-TERM DEBT_4

NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Schedule of Long-Term Debt) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Unamortized debt discount and issuance costs	$ (365)	$ (331)
Long-term debt due within one year	(460)	(435)
Long-term debt	16,491	15,975
Long Term Debt, Accumulated Fair Value Adjustment	69	$ 1
Maturities of Long-term Debt [Abstract]
2020	460
2021	236
2022	381
2023	1,079
2024	$ 717
Promissory notes and debentures | Final maturity 2020
Debt Instrument [Line Items]
Weighted average rate	0.00%	8.44%
Long-term debt, gross	$ 0	$ 76
Promissory notes and debentures | Final maturity 2021
Debt Instrument [Line Items]
Weighted average rate	8.95%	8.95%
Long-term debt, gross	$ 173	$ 174
Promissory notes and debentures | Final maturity 2022
Debt Instrument [Line Items]
Weighted average rate	8.64%	3.50%
Long-term debt, gross	$ 121	$ 1,372
Promissory notes and debentures | Final maturity 2023
Debt Instrument [Line Items]
Weighted average rate	7.63%	7.64%
Long-term debt, gross	$ 250	$ 325
Promissory notes and debentures | Final maturity 2024 1
Debt Instrument [Line Items]
Weighted average rate	3.43%	3.37%
Long-term debt, gross	$ 1,017	$ 1,397
Promissory notes and debentures | Final maturity 2025
Debt Instrument [Line Items]
Weighted average rate	5.13%	5.26%
Long-term debt, gross	$ 625	$ 662
Promissory notes and debentures | Final maturity 2026 and thereafter 1
Debt Instrument [Line Items]
Weighted average rate	5.22%	5.73%
Long-term debt, gross	$ 10,888	$ 8,820
Promissory notes and debentures | U.S. dollar loans
Debt Instrument [Line Items]
Weighted average rate	0.00%	2.55%
Long-term debt, gross	$ 0	$ 2,000
Promissory notes and debentures | Foreign currency notes and loans, various rates and maturities
Debt Instrument [Line Items]
Weighted average rate	1.41%	3.26%
Long-term debt, gross	$ 3,189	$ 592
Medium-term notes, varying maturities through 2049
Debt Instrument [Line Items]
Weighted average rate	3.56%	3.44%
Long-term debt, gross	$ 535	$ 928
Finance Lease Obligations
Debt Instrument [Line Items]
Finance lease obligations	$ 518	$ 395

NOTES PAYABLE, LONG-TERM DEBT_5

NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Narrative) € in Millions, $ in Millions

1 Months Ended

3 Months Ended

12 Months Ended

Sep. 30, 2020USD ($)

Aug. 31, 2020USD ($)

Dec. 31, 2018USD ($)

Sep. 30, 2020USD ($)

Mar. 31, 2020USD ($)

Jun. 30, 2019USD ($)

Dec. 31, 2020USD ($)

Dec. 31, 2019USD ($)

Dec. 31, 2018USD ($)

Jan. 15, 2021USD ($)

Aug. 31, 2020EUR (€)

Feb. 28, 2020EUR (€)

Oct. 01, 2019USD ($)

May 31, 2019USD ($)

Nov. 30, 2018USD ($)

Debt Instrument [Line Items]

Loss on early extinguishment of debt

$ (149)

$ (102)

$ (54)

Total notes payable

156

586

Repayments of Long-term Debt

134

Proceeds from issuance of long-term debt

4,672

2,287

1,999

Variable Interest Entity, Primary Beneficiary

Debt Instrument [Line Items]

Proceeds from issuance of long-term debt

16

Notes payable to banks and other lenders

Debt Instrument [Line Items]

Total notes payable

156

435

Uncommitted Credit Facility [Member] | Notes payable to banks and other lenders

Debt Instrument [Line Items]

Total notes payable

$ 800

Tax-exempt bonds, varying maturities through 2038 | Sundry Income (Expense), Net

Debt Instrument [Line Items]

Loss on early extinguishment of debt

6

Euros Notes [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance | €

€ 2,250

Stated interest rate

1.00%

0.50 Percent Notes Due 2027 [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance | €

€ 1,000

Stated interest rate

0.50%

1.125 Percent Notes Due 2032 [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance | €

€ 750

Stated interest rate

1.125%

1.875 Percent Notes Due 2040 [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance | €

€ 500

Stated interest rate

1.875%

Term Loan Facility, Due September 2023 [Member] | Revolving Credit Facility

Debt Instrument [Line Items]

Repayments of Debt

$ 1,250

$ 750

3.0 Percent Notes Due 2022 [Member]

Debt Instrument [Line Items]

Stated interest rate

3.00%

Repayments of Notes Payable

$ 1,250

3.0 Percent Notes Due 2022 [Member] | Sundry Income (Expense), Net

Debt Instrument [Line Items]

Loss on early extinguishment of debt

$ 85

U.S. Dollar Notes [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance | €

€ 2,000

Proceeds from Issuance of Long-term Debt

$ 556

2.1 Percent Notes Due 2030 [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance | €

€ 850

Stated interest rate

2.10%

3.6 Percent Notes Due 2050 [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance | €

€ 1,150

Stated interest rate

3.60%

Debt Securities [Member]

Debt Instrument [Line Items]

Repayments of Long-term Debt

$ 493

Debt Securities [Member] | Sundry Income (Expense), Net

Debt Instrument [Line Items]

Loss on early extinguishment of debt

$ 62

InterNotes redeemed

Debt Instrument [Line Items]

Repayments of Notes Payable

180

122

91

Notes Issued

190

$ 277

InterNotes redeemed, Various maturities [Member]

Debt Instrument [Line Items]

Repayments of Notes Payable

400

InterNotes redeemed, Various maturities [Member] | Sundry Income (Expense), Net

Debt Instrument [Line Items]

Loss on early extinguishment of debt

2

InterNotes [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Debt Instrument, Notice to Call, Amount

$ 118

Senior Unsecured Notes

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance

$ 2,000

$ 2,000

Senior Unsecured Notes, 4 Point 80 Percent, Due 2049 [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance

$ 750

Stated interest rate

4.80%

4.80%

Senior Unsecured Notes, 3 Point 625 Percent, Due 2026 [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance

$ 750

Stated interest rate

3.625%

3.625%

Senior Unsecured Notes, 3 Point 15 Percent, Due 2024 [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance

$ 500

Stated interest rate

3.15%

3.15%

Four Point Two Five Percent Notes [Member]

Debt Instrument [Line Items]

Stated interest rate

4.25%

Repayments of Notes Payable

$ 1,500

Four Point Two Five Percent Notes [Member] | Sundry Income (Expense), Net

Debt Instrument [Line Items]

Loss on early extinguishment of debt

$ 100

Four Point One Two Five Percent Notes Due 2021 [Member]

Debt Instrument [Line Items]

Stated interest rate

4.125%

Repayments of Notes Payable

$ 1,250

Long Term Debt Repayment - Variable Interest Entity

Debt Instrument [Line Items]

Repayments of Debt

$ 29

$ 149

$ 138

Term Loan Facility, Due December 2023 [Member]

Debt Instrument [Line Items]

Repayments of Debt

$ 2,500

Term Loan Facility, Due December 2023 [Member] | Sundry Income (Expense), Net

Debt Instrument [Line Items]

Loss on early extinguishment of debt

$ 2

Exchangeable Debt [Member]

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance

$ 4,000

5.7% Notes Due 2018 | Promissory notes and debentures

Debt Instrument [Line Items]

Stated interest rate

5.70%

5.70%

Principal amount redeemed

$ 333

$ 333

Tax-exempt Bonds, varying maturities through 2038

Debt Instrument [Line Items]

Repayments of Debt

$ 343

Senior Unsecured Notes, 5 .55%, Due 2048

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance

$ 900

Stated interest rate

5.55%

5.55%

Senior Unsecured Notes, 4.80%, Due 2028

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance

$ 600

Stated interest rate

4.80%

4.80%

Senior Unsecured Notes, 4.55%, Due 2025

Debt Instrument [Line Items]

Debt Instrument, Face Amount on Issuance

$ 500

Stated interest rate

4.55%

4.55%

8.55% Notes Retired

Debt Instrument [Line Items]

Stated interest rate

8.55%

8.55%

Repayments of Notes Payable

$ 2,100

8.55% Notes Retired | Sundry Income (Expense), Net

Debt Instrument [Line Items]

Loss on early extinguishment of debt

$ 48

NOTES PAYABLE, LONG-TERM DEBT_6

NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Schedule of Committed and Available Credit Facilities) € in Millions, $ in Millions	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Oct. 31, 2018EUR (€)	Sep. 30, 2018USD ($)
Line of Credit Facility [Line Items]
Committed Credit	$ 8,100
Credit Available	8,100
Letters of Credit Outstanding, Amount	400
Guarantees
Line of Credit Facility [Line Items]
Maximum future payments	251	$ 3,952
Sadara Chemical Company | Guarantees
Line of Credit Facility [Line Items]
Maximum future payments	220
Revolving Credit Facility | Five Year Competitive Advance and Revolving Credit Facility
Line of Credit Facility [Line Items]
Committed Credit	5,000
Credit Available	5,000
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due November 2021
Line of Credit Facility [Line Items]
Committed Credit	200
Credit Available	200
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due December 2021, Facility One
Line of Credit Facility [Line Items]
Committed Credit	300
Credit Available	300
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due December 2021, Facility Two
Line of Credit Facility [Line Items]
Committed Credit	300
Credit Available	300
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due March 2022
Line of Credit Facility [Line Items]
Committed Credit	150
Credit Available	150
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due June 2022
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due September 2022
Line of Credit Facility [Line Items]
Committed Credit	200
Credit Available	200
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due September 2023, Facility One
Line of Credit Facility [Line Items]
Committed Credit	200
Credit Available	200
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due September 2023, Facility Two
Line of Credit Facility [Line Items]
Committed Credit	250
Credit Available	250
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due September 2023, Facility Three
Line of Credit Facility [Line Items]
Committed Credit	300
Credit Available	300
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due October 2024, Facility One [Member]
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due October 2024, Facility Two
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due November 2024 [Member]
Line of Credit Facility [Line Items]
Committed Credit	200
Credit Available	200
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due March 2025, Facility One
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due March 2025, Facility Two
Line of Credit Facility [Line Items]
Committed Credit	250
Credit Available	250
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due March 2025, Facility Three
Line of Credit Facility [Line Items]
Committed Credit	350
Credit Available	$ 350
Secured Debt | Accounts Receivable Securitization Facility, North American Facility
Line of Credit Facility [Line Items]
Committed Credit				$ 800
Secured Debt | Accounts Receivable Securitization Facility, European Facility
Line of Credit Facility [Line Items]
Committed Credit | €			€ 400

NOTES PAYABLE, LONG-TERM DEBT_7

NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Debt Covenants) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
The Dow Chemical Company
Debt Instrument [Line Items]
Amount at which a failure to pay results in repayment acceleration	$ 100
Amount of principal to be accelerated upon default	400
Amount of judgment which will cause a default	$ 400
The Dow Chemical Company | Revolving Credit Facility | Five Year Competitive Advance and Revolving Credit Facility
Debt Instrument [Line Items]
Ratio of total indebtedness to total capitalization	0.65
Aggregate amount outstanding to trigger indebtedness to total capitalization covenant	$ 500
Dow Inc. [Member]
Debt Instrument [Line Items]
Debt Instrument, Debt Default, Default Trigger, Amount Guaranteed for Third Party Indebtedness for Borrowed Money	$ 250

COMMITMENTS AND CONTINGENT LI_3

COMMITMENTS AND CONTINGENT LIABILITIES (Environmental Matters) - USD ($) $ in Millions	Jun. 01, 2004	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies, Revision in Estimates							$ 399					$ (399)
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrual adjustment											$ 285	590
Payments against reserve											(198)	(241)
Foreign currency impact											2	(4)
Environmental Remediation Expense											(234)	(588)	$ (176)
Capital expenditures for environmental protection											80	83	55
Restructuring, goodwill impairment and asset related charges - net		$ (11)	$ 617	$ 6	$ 96	$ 2,851	147	$ 65	$ 156		708	3,219	221
2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net			575							$ 573
Costs Associated with Exit and Disposal Activities | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net			81							80
Environmental Remediation [Member] | Costs Associated with Exit and Disposal Activities | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										56
Packaging & Specialty Plastics [Member]
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies, Revision in Estimates							5					(5)
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net											30	439	46
Packaging & Specialty Plastics [Member] | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										11
Packaging & Specialty Plastics [Member] | Costs Associated with Exit and Disposal Activities | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										0
Industrial Intermediates & Infrastructure [Member]
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies, Revision in Estimates							8					(8)
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net											22	1,175	11
Industrial Intermediates & Infrastructure [Member] | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										22
Industrial Intermediates & Infrastructure [Member] | Costs Associated with Exit and Disposal Activities | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										0
Performance Materials & Coatings [Member]
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies, Revision in Estimates							50					(50)
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net											192	1,076	21
Performance Materials & Coatings [Member] | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										177
Performance Materials & Coatings [Member] | Costs Associated with Exit and Disposal Activities | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										61
Performance Materials & Coatings [Member] | Environmental Remediation [Member] | Costs Associated with Exit and Disposal Activities | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										52
Corporate Segment [Member]
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies, Revision in Estimates							336					(336)
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net											464	529	143
Corporate Segment [Member] | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										363
Corporate Segment [Member] | Costs Associated with Exit and Disposal Activities | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										19
Corporate Segment [Member] | Environmental Remediation [Member] | Costs Associated with Exit and Disposal Activities | 2020 Restructuring Program [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net										4
Tittabawassee and Saginaw Rivers, Saginaw Bay [Member]
Site Contingency [Line Items]
Accrued obligations for environmental matters		77								77	77			$ 77
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at Dec 31		77								77	77
Payments for Legal Settlements		15
Tittabawassee and Saginaw Rivers, Saginaw Bay - Local Projects [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Payments for Legal Settlements		7
Other Environmental Matters
Site Contingency [Line Items]
Accrued obligations for environmental matters		1,244			1,155	1,155			810	1,244	1,155	1,155	810	1,244	$ 1,155
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at Jan 1					1,155				$ 810		1,155	810
Balance at Dec 31		1,244				1,155				1,244	1,244	1,155	$ 810
Other Environmental Matters | Superfund Sites
Site Contingency [Line Items]
Accrued obligations for environmental matters		248			207	207				248	207	207		248	207
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at Jan 1					207						207
Balance at Dec 31		248				207				248	248	207
Other Environmental Matters, Off-Site Matters
Site Contingency [Line Items]
Accrued obligations for environmental matters		107			135	135				107	135	135		107	135
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at Jan 1					$ 135						135
Balance at Dec 31		$ 107				$ 135				$ 107	$ 107	$ 135
Dow Silicones Corporation
Site Contingency [Line Items]
Indemnification asset														$ 115	$ 100
Dow Silicones Corporation | Commercial Creditors Litigation
Accrual for Environmental Loss Contingencies [Roll Forward]
Payments for Legal Settlements	$ 1,500
Dow Silicones Corporation | Environmental Issue [Member]
Site Contingency [Line Items]
Indemnification asset			$ 50				$ 48

COMMITMENTS AND CONTINGENT LI_4

COMMITMENTS AND CONTINGENT LIABILITIES (Asbestos-Related Matters of Union Carbide Corporation) - Union Carbide Corporation - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2002
Loss Contingencies [Line Items]
Asbestos-related charge	$ 1,113
Asbestos Related Matters
Loss Contingencies [Line Items]
Liability for asbestos-related pending and future claims		$ 1,098	$ 1,165
Percentage of recorded asbestos liability related to pending claims		22.00%	18.00%
Percentage of recorded asbestos liability related to future claims		78.00%	82.00%
Asbestos Related Matters, Pending and Future Claims
Loss Contingencies [Line Items]
Liability for asbestos-related pending and future claims				$ 2,200

COMMITMENTS AND CONTINGENT LI_5

COMMITMENTS AND CONTINGENT LIABILITIES (Dow Silicones Chapter 11 Related Matters) - USD ($) $ in Millions	Jun. 01, 2016	Jun. 01, 2004	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019
Commercial Creditors Litigation
Loss Contingencies [Line Items]
Decrease in liability				$ 0	$ (50)	$ 0
Other Noncurrent Assets [Member]
Loss Contingencies [Line Items]
Indemnification asset				33	52
Dow Silicones Corporation
Loss Contingencies [Line Items]
Indemnification percentage	50.00%
Indemnification asset				115	100
Dow Silicones Corporation | Between May 31, 2018 and May 31, 2023
Loss Contingencies [Line Items]
Indemnification loss cap	$ 1,000
Dow Silicones Corporation | After May 31, 2023
Loss Contingencies [Line Items]
Indemnification loss cap	$ 0
Dow Silicones Corporation | Commercial Creditors Litigation
Loss Contingencies [Line Items]
Decrease in liability			$ (50)
Indemnification asset			37	0	37
Dow Silicones Corporation | Accrued and Other Current Liabilities [Member] | Commercial Creditors Litigation
Loss Contingencies [Line Items]
Estimated litigation liability			172
Dow Silicones Corporation | Breast Implant and Other Products Liability Claims
Loss Contingencies [Line Items]
Maximum net present value		$ 2,350
Discount rate		7.00%
Undiscounted product liability				4,081
Portion available to fund the Litigation Facility		$ 400
Payments for product liabilities				1,762
Unexpended balance				58
Decrease in liability			98
Product liability				160	165
Dow Silicones Corporation | Breast Implant and Other Products Liability Claims | Other Noncurrent Obligations
Loss Contingencies [Line Items]
Product liability				114	145
Dow Silicones Corporation | Breast Implant and Other Products Liability Claims | Accrued and Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Product liability				$ 46	20
Dow Silicones Corporation | Commercial Creditors Litigation
Loss Contingencies [Line Items]
Payments for legal settlements		$ 1,500
Class 16 receivable [Member] | Dow Silicones Corporation | Breast Implant and Other Products Liability Claims
Loss Contingencies [Line Items]
Decrease in liability			(13)
Environmental Issue [Member] | Dow Silicones Corporation
Loss Contingencies [Line Items]
Indemnification asset			50				$ 48
Environmental Issue [Member] | Dow Silicones Corporation | Other Noncurrent Assets [Member]
Loss Contingencies [Line Items]
Indemnification asset			$ 115		$ 63

COMMITMENTS AND CONTINGENT LI_6

COMMITMENTS AND CONTINGENT LIABILITIES (Dow v Nova) $ in Millions, $ in Millions	Mar. 31, 2020USD ($)	Jul. 06, 2017USD ($)	Jun. 29, 2017USD ($)	Jun. 29, 2017CAD ($)	Dec. 31, 2020USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2019CAD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2019CAD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Loss Contingencies [Line Items]
Gain (loss) related to litigation settlement												$ 544	$ 205
Breast Implant and Other Products Liability Claims | Dow Silicones Corporation
Loss Contingencies [Line Items]
Product liability					$ 160		$ 165					160	165
Accrued and Other Current Liabilities [Member] | Breast Implant and Other Products Liability Claims | Dow Silicones Corporation
Loss Contingencies [Line Items]
Product liability					46		20					46	20
Other Noncurrent Obligations | Breast Implant and Other Products Liability Claims | Dow Silicones Corporation
Loss Contingencies [Line Items]
Product liability					114		145					114	145
Packaging & Specialty Plastics [Member]
Loss Contingencies [Line Items]
Gain (loss) related to litigation settlement												544	170
Dow V. Nova Chemicals Corporation Patent Infringement Matter
Loss Contingencies [Line Items]
Settlement amount			$ 495	$ 645
Proceeds from settlements		$ 501
Dow V. Nova Chemicals Corporation Patent Infringement Matter | Accrued and Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Estimated liability					341		0					341	0
Dow V. Nova Chemicals Corporation Patent Infringement Matter | Other Noncurrent Obligations
Loss Contingencies [Line Items]
Estimated liability					0		341					0	341
Dow V. Nova Chemicals Corporation Patent Infringement Matter | Packaging & Specialty Plastics [Member]
Loss Contingencies [Line Items]
Gain (loss) related to litigation settlement											$ 160
Dow V. Nova Chemicals Corporation Ethylene Asset Matter [Member] [Member]
Loss Contingencies [Line Items]
Settlement amount	$ 259								$ 1,080	$ 1,430
Proceeds from settlements							800	$ 1,080
Gain (loss) related to litigation settlement					552	$ 18			186
Estimated liability					323		$ 893					$ 323	$ 893
Litigation settlement, Amount Awarded from Other Party - Withholding Tax								$ 347
Dow V. Nova Chemicals Corporation Ethylene Asset Matter [Member] [Member] | Selling, General and Administrative Expenses
Loss Contingencies [Line Items]
Gain (loss) related to litigation settlement					538	12			16
Dow V. Nova Chemicals Corporation Ethylene Asset Matter [Member] [Member] | Sundry Income (Expense), Net
Loss Contingencies [Line Items]
Gain (loss) related to litigation settlement					$ 14	$ 6			$ 170

COMMITMENTS AND CONTINGENT LI_7

COMMITMENTS AND CONTINGENT LIABILITIES (Guarantees) - USD ($) $ in Millions	Jan. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Guarantees [Abstract]
Long-term debt		$ 16,951	$ 16,410
Sadara Chemical Company
Guarantees [Abstract]
Ownership interest		35.00%	35.00%	35.00%
Sadara Chemical Company | Total Project Financing
Guarantees [Abstract]
Principal amount		$ 12,500
Long-term debt			$ 10,800
Guarantees
Guarantees [Abstract]
Maximum future payments		251	3,952
Recorded liability		2	$ 10
Guarantees | Sadara Chemical Company
Guarantees [Abstract]
Maximum future payments		$ 220
Guarantees | Sadara Chemical Company | Subsequent Event [Member] | Sadara Chemical Company
Guarantees [Abstract]
Maximum future payments	$ 500
Guarantees | Sadara Chemical Company | Subsequent Event [Member] | Sadara Chemical Company
Guarantees [Abstract]
Maximum future payments	$ 1,300

COMMITMENTS AND CONTINGENT LI_8

COMMITMENTS AND CONTINGENT LIABILITIES (Asset Retirement Obligations) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)brinesandwellswellsmanufacturingsitescountries	Dec. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Number of Manufacturing Sites | manufacturingsites	106
Number of Countries With Manufacturing Sites | countries	31
Conditional Asset Retirement Obligations Carrying Value	$ 14	$ 19
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at Jan 1	104	109
Additional accruals	6	10
Liabilities settled	(3)	(7)
Accretion expense	3	2
Revisions in estimated cash flows	7	3
Asset Retirement Obligation Other Activity	(5)	(13)
Balance at Dec 31	$ 112	$ 104
Asset retirement obligation discount rate	0.42%	2.12%
Number of underground storage wells without conditional asset retirement obligation | wells	36
Number of underground brine, mining and other wells without conditional asset retirement obligation | brinesandwells	129

LEASES_2_3

LEASES - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Operating Lease, Cost	$ 484	$ 532
Amortization of right-of-use assets - finance	58	39
Interest on lease liabilities - finance	25	25
Total finance lease cost	83	64
Short-term lease cost	213	204
Variable lease cost	199	198
Sublease income	(5)	(4)
Total lease cost	974	994
Operating cash flows for operating leases	482	544
Operating cash flows for finance leases	25	25
Financing cash flows for finance leases	58	34
Operating leases 1	185	2,476
Finance leases	178	89
Operating lease right-of-use assets	1,856	2,072
Property	56,325	54,910
Less: Accumulated depreciation	(36,086)	(33,914)
Total Lease Assets	2,305	2,391
Operating lease liabilities - current	416	421
Finance Lease, Liability, Current	54	32
Operating lease liabilities - noncurrent	1,521	1,739
Finance Lease, Liability, Noncurrent	464	363
Total Lease Liabilities	$ 2,455	$ 2,555
Weighted-average remaining lease term - Operating leases	7 years 7 months 6 days	8 years
Weighted-average remaining lease term - Finance leases	11 years 7 months 6 days	12 years 3 months 18 days
Weighted-average discount rate - Operating leases	3.84%	4.09%
Weighted-average discount rate - Finance leases	5.41%	6.28%
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 477
Finance Lease, Liability, to be Paid, Year One	78
Lessee, Operating Lease, Liability, to be Paid, Year Two	387
Finance Lease, Liability, Payments, Due Year Two	74
Lessee, Operating Lease, Liability, Payments, Due Year Three	312
Finance Lease, Liability, Payments, Due Year Three	98
Lessee, Operating Lease, Liability, Payments, Due Year Four	242
Finance Lease, Liability, Payments, Due Year Four	45
Lessee, Operating Lease, Liability, Payments, Due Year Five	164
Finance Lease, Liability, Payments, Due Year Five	41
Lessee, Operating Lease, Liability, Payments, Due after Year Five	703
Finance Lease, Liability, Payments, Due after Year Five	373
Lessee, Operating Lease, Liability, Payments, Due	2,285
Finance Lease, Liability, Payment, Due	709
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	348
Finance Lease, Liability, Undiscounted Excess Amount	191
Lease liability	1,937
Finance Lease, Liability	518
Lessee, Additional Leases Not yet Commenced, Assumptions and Judgment, Amount	$ 56
Lessee, Additional Leases Not yet Commenced, Term of Contract	10 years
Residual Value Guarantees
Maximum future payments	$ 818	$ 792
Recorded liability	22	0
Accounting Standards Update 2016-02
Operating leases 1		2,300
Operating lease right-of-use assets			$ 2,300
Finance Leases [Member]
Property	665	486
Less: Accumulated depreciation	$ (216)	$ (167)
Maximum
Lessee, Operating and Finance Leases, Remaining Lease Term	55 years

STOCKHOLDERS' EQUITY (Common St

STOCKHOLDERS' EQUITY (Common Stock) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Apr. 01, 2019
Class of Stock [Line Items]
Common stock authorized (in shares)	5,000,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01
Common stock issued (in shares)	755,993,198	751,228,644
Non-Employee Directors | Common Stock
Class of Stock [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans	4,800,000	2,500,000
Dow Inc. [Member]
Class of Stock [Line Items]
Common stock authorized (in shares)		100	5,000,000,000
Common Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01
Common stock issued (in shares)		100	748,771,240
The Dow Chemical Company
Class of Stock [Line Items]
Common stock authorized (in shares)	100		100
Common Stock, Par or Stated Value Per Share			$ 0.01

STOCKHOLDERS' EQUITY (Retained

STOCKHOLDERS' EQUITY (Retained Earnings) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Dividends declared (in dollars per share)	$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 2.80	$ 2.10	$ 0
Undistributed Earnings of Nonconsolidated Affiliates	$ 716				$ 852			$ 716	$ 852
The Dow Chemical Company | DowDuPont
Dividends declared and paid									535	$ 3,711
The Dow Chemical Company | Dow Inc. [Member]
Dividends declared and paid								$ 2,233	$ 201
Dow Inc. [Member]
Dividends declared (in dollars per share)								$ 2.80	$ 2.10

STOCKHOLDERS' EQUITY (Employee

STOCKHOLDERS' EQUITY (Employee Stock Ownership Plan) - USD ($) shares in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2009	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019	Apr. 02, 2009
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Debt of ESOP		$ 0	$ 3
Employee Stock Ownership Plan (ESOP), Shares in ESOP					4.6
Dow ESOP
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
ESOP, compensation expense		$ 72	$ 77	$ 144
Shares allocated to participants' accounts		4.4
Employee Stock Ownership Plan (ESOP), Shares in ESOP		6.1
Number of unearned shares		1.7
Fair value of unearned shares		$ 93
Rohm And Haas | Rohm and Haas ESOP
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Debt of ESOP						$ 78
Interest rate on debt of ESOP	9.80%

STOCKHOLDERS' EQUITY (Treasury

STOCKHOLDERS' EQUITY (Treasury Stock) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019
Equity, Class of Treasury Stock [Line Items]
Treasury Stock Reissued	0	0
Share buy-back program authorized amount				$ 3,000
Payments for the repurchase of common stock	$ 125	$ 500	$ 0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 2,400

STOCKHOLDERS' EQUITY (Shares of

STOCKHOLDERS' EQUITY (Shares of Dow Common Stock) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Apr. 01, 2019	Dec. 31, 2018
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward [Line Items]
Common Stock, Shares Authorized	5,000,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01
Issued (in shares)	4,764,554	2,457,404
Impact of recapitalization		748,771,140
Treasury Stock Reissued	0	0
Issued
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward [Line Items]
Shares, Outstanding	755,993,198	751,228,644		100
Held in Treasury
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward [Line Items]
Shares, Outstanding	12,803,303	9,729,834		0
Repurchased	3,073,469	9,729,834
Dow Inc. [Member]
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward [Line Items]
Common Stock, Shares Authorized		100	5,000,000,000
Common Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01

STOCKHOLDERS' EQUITY (Accumulat

STOCKHOLDERS' EQUITY (Accumulated Other Comprehensive Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (10,246)	$ (9,885)
Total other comprehensive loss	(609)	(1,154)	$ (257)
Settlements and transfers related to separation from DowDuPont Inc.	0	(1,935)	240
Ending Balance	(10,855)	(10,246)	(9,885)
Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	64	(51)	17
Other Comprehensive Income (Loss), before Reclassifications, before Tax	104	178	(93)
Other Comprehensive Income (Loss) before Reclassifications, Tax	(23)	(38)	19
Other comprehensive income (loss) before reclassifications	81	140	(74)
Total other comprehensive loss	40	115	(67)
Ending Balance	104	64	(51)
Cumulative Translation Adj
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,135)	(1,813)	(1,481)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	227	59	(215)
Other Comprehensive Income (Loss) before Reclassifications, Tax	25	(2)	(6)
Other comprehensive income (loss) before reclassifications	252	57	(221)
Total other comprehensive loss	205	(32)	(225)
Ending Balance	(930)	(1,135)	(1,813)
Pension and Other Postretire Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(8,781)	(7,965)	(6,998)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(1,769)	(1,699)	(625)
Other Comprehensive Income (Loss) before Reclassifications, Tax	411	413	130
Other comprehensive income (loss) before reclassifications	(1,358)	(1,286)	(495)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	753	504	594
Reclassification from AOCI, Current Period, Tax	(173)	(117)	(139)
Amounts reclassified from accumulated other comprehensive income (loss)	580	387	455
Total other comprehensive loss	(778)	(899)	(40)
Ending Balance	(9,559)	(8,781)	(7,965)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(394)	(56)	(109)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(96)	(470)	6
Other Comprehensive Income (Loss) before Reclassifications, Tax	(1)	101	(2)
Other comprehensive income (loss) before reclassifications	(97)	(369)	4
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	30	44	89
Reclassification from AOCI, Current Period, Tax	(9)	(13)	(18)
Amounts reclassified from accumulated other comprehensive income (loss)	21	31	71
Total other comprehensive loss	(76)	(338)	75
Ending Balance	(470)	(394)	(56)
Retained Earnings [Member] | Cumulative Translation Adj
Accumulated Other Comprehensive Income (Loss) [Line Items]
Settlements and transfers related to separation from DowDuPont Inc.	0	710	0
Retained Earnings [Member] | Pension and Other Postretire Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Settlements and transfers related to separation from DowDuPont Inc.	0	83	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(54)	(33)	9
Reclassification from AOCI, Current Period, Tax	13	8	(2)
Amounts reclassified from accumulated other comprehensive income (loss)	(41)	(25)	7
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cumulative Translation Adj
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss)	(47)	(89)	(4)
Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings [Member] | Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	0	0	(1)
Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings [Member] | Cumulative Translation Adj
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	0	0	(107)
Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings [Member] | Pension and Other Postretire Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	0	0	(927)
Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings [Member] | Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	$ 0	$ 0	$ (22)

NONCONTROLLING INTERESTS Nonc_2

NONCONTROLLING INTERESTS Noncontrolling Interests - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at Jan 1		$ 553	$ 1,138
Transfer of business under common control		0	1,935	$ (240)
Balance at Dec 31	$ 570	570	553	1,138
Variable Interest Entity, Primary Beneficiary | Propylene Oxide Joint Venture [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Adjustments to Additional Paid in Capital, Other			38
Discontinued Operations [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Distributions to noncontrolling interests			7	37
Noncontrolling Interests
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at Jan 1		553	1,138	1,186
Net income attributable to noncontrolling interests - continuing operations		69	74	102
Net income attributable to noncontrolling interests - discontinued operations		0	13	32
Distributions to noncontrolling interests		(55)	(77)	(145)
Transfer of business under common control		0	(353)	0
Purchase of noncontrolling interests 3		0	(254)	0
Deconsolidation of noncontrolling interests		(7)	0	0
Cumulative translation adjustments		9	12	(39)
Noncontrolling Interest, Increase (Decrease) From Other Activity	1		0	2
Balance at Dec 31	$ 570	570	553	1,138
Dividends Paid to a Joint Venture Not Included in Distributions to NCI		$ 7	$ 7	$ 27

PENSION PLANS AND OTHER POSTR_3

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Defined Benefit Pension Plans) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plans, Number of Plans, Including Discontinued Operations		45
Defined Benefit Pension Plans, Number of Plans		35
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Current	$ 54	$ 49
Pension contributions	299
Employer contributions	299	$ 266
Expected pension contributions	$ 300
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate - benefit obligations	2.20%	2.81%	3.69%
Discount rate - net periodic costs	2.81%	3.50%	3.17%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	3.55%	3.51%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate	3.51%	3.72%	3.61%
Rate of compensation increase - benefit obligations	3.91%	3.92%
Rate of compensation increase - net periodic costs	3.92%	3.92%	3.88%
Expected return on plan assets - net periodic costs	7.00%	7.11%	7.11%
UNITED STATES
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate - benefit obligations	2.71%	3.41%
Discount rate - net periodic costs	3.41%	4.15%	3.66%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	4.50%	4.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate	4.50%	4.50%	4.50%
Rate of compensation increase - benefit obligations	4.25%	4.25%
Rate of compensation increase - net periodic costs	4.25%	4.25%	4.25%
Expected return on plan assets - net periodic costs	7.95%	7.92%	7.92%
Discontinued Operations [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Current		$ 270

PENSION PLANS AND OTHER POSTR_4

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Other Postretirement Benefits) - Other Postretirement Benefit Plans	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit obligations	2.38%	3.19%
Discount rate - net periodic costs	3.19%	4.01%	3.51%
Health Care Cost Trend Rate Assumed for Next Year - benefit obligations	6.75%	6.25%
Health Care Cost Trend Rate Assumed for Next Year - net periodic costs	6.25%	6.50%	6.75%
Rate to which the cost trend rate is assumed to decline (the ultimate health care cost trend rate) - benefit obligations	5.00%	5.00%
Rate to which the cost trend rate is assumed to decline (the ultimate health care cost trend rate) - net periodic costs	5.00%	5.00%	5.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate to Calculate PBO, End of Year	2028	2025
Year that the Rate Reaches the Ultimate Health Care Cost Trend Rate	2025	2025	2025

PENSION PLANS AND OTHER POSTR_5

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Change in Projected Benefit Obligations, Plan Assets and Funded Status of All Significant Plans) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 24,900
Fair value of plan assets at end of year	26,400	$ 24,900
Non-US [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(2,222)	(2,207)
Defined Benefit Pension Plans
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit obligations at beginning of year	32,621	29,600
Defined Benefit Plan, Benefit Obligation, Divestiture		(53)
Service cost	399	396	$ 520
Interest cost	767	921	886
Plan participants' contributions	12	12
Actuarial changes in assumptions and experience	3,021	3,904
Benefits paid	(1,569)	(1,684)
Plan amendments	8	0
Defined Benefit Plan Business Combinations And Acquisitions Divestiture Other Benefit Obligation	(692)	(37)
Effect of foreign exchange rates	791	14
Termination Benefits/curtailment cost/settlements	(49)	(174)
Benefit obligations at end of year	35,309	32,621	29,600
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	24,908	22,544
Actual return on plan assets	2,877	3,790
Employer contributions	299	266
Plan participants' contributions	12	12
Benefits paid	(1,569)	(1,684)
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan	(681)	0
Effect of foreign exchange rates	571	41
Defined Benefit Plan, Plan Assets, Payment for Settlement	(11)	0
Fair value of plan assets at end of year	26,406	24,908	$ 22,544
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(8,903)	(7,713)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Accrued and other current liabilities	(54)	(49)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(8,903)	(7,713)
Pension and other postretirement benefits - noncurrent	(9,856)	(8,287)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Net loss (gain)	12,736	11,761
Prior service credit	(154)	(177)
Pretax balance in AOCL at end of year	$ 12,582	$ 11,584
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.20%	2.81%	3.69%
Defined Benefit Pension Plans | Discontinued Operations [Member]
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Divestiture	$ 0	$ (331)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Divestiture	0	(61)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Accrued and other current liabilities		(270)
Other Postretirement Benefit Plans
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit obligations at beginning of year	1,535	1,478
Defined Benefit Plan, Benefit Obligation, Divestiture	0	0
Service cost	7	8	$ 12
Interest cost	40	49	45
Plan participants' contributions	0	0
Actuarial changes in assumptions and experience	7	148
Benefits paid	(132)	(148)
Plan amendments	0	0
Defined Benefit Plan Business Combinations And Acquisitions Divestiture Other Benefit Obligation	0	0
Effect of foreign exchange rates	7	3
Termination Benefits/curtailment cost/settlements	0	(3)
Benefit obligations at end of year	1,464	1,535	1,478
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Defined Benefit Plan, Plan Assets, Divestiture	0	0
Actual return on plan assets	0	0
Employer contributions	0	0
Plan participants' contributions	0	0
Benefits paid	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan	0	0
Effect of foreign exchange rates	0	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Fair value of plan assets at end of year	0	0	$ 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(1,464)	(1,535)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Accrued and other current liabilities	(113)	(128)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(1,464)	(1,535)
Pension and other postretirement benefits - noncurrent	(1,351)	(1,407)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Net loss (gain)	(129)	(147)
Prior service credit	0	0
Pretax balance in AOCL at end of year	$ (129)	$ (147)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.38%	3.19%
UNITED STATES
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (5,873)	$ (4,768)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.71%	3.41%
Pension Plan, Excluding Plans with Plan Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (808)	$ (738)
Other Postretirement Benefit Plans, Excluding Plans with Plan Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(1,464)	(1,535)
Deferred charges and other assets [Member] | Defined Benefit Pension Plans
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Assets for Plan Benefits, Defined Benefit Plan	1,007	623
Deferred charges and other assets [Member] | Other Postretirement Benefit Plans
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Assets for Plan Benefits, Defined Benefit Plan	$ 0	$ 0

PENSION PLANS AND OTHER POSTR_6

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Accum Benefit Obligations in Excess) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 34,100	$ 31,400
Accumulated benefit obligations	29,084	26,959
Fair value of plan assets	$ 20,130	$ 19,571

PENSION PLANS AND OTHER POSTR_7

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Projected Benefit Obligations in Excess) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Projected benefit obligations	$ 30,161	$ 28,013
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets	$ 20,251	$ 19,677

PENSION PLANS AND OTHER POSTR_8

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Net Periodic Benefit Cost and Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income for All Significant Plans) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ (103)	$ (205)	$ (123)
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(8,903)	(7,713)
Service cost	399	396	520
Interest cost	767	921	886
Expected return on plan assets	(1,658)	(1,679)	(1,644)
Amortization of prior service credit	(19)	(20)	(24)
Amortization of unrecognized (gain) loss	773	574	642
Curtailment/settlement/other	9	(27)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Including Discontinued Operations	271	165	380
Net periodic benefit cost	271	144	279
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(1,753)	(1,606)	(584)
Prior service cost (credit)	8	0	17
Net (gain) loss	(773)	(574)	(642)
Prior service cost	19	20	24
Settlement loss	(9)	27	0
Total recognized in other comprehensive (income) loss	998	967	(17)
Total recognized in net periodic benefit cost and other comprehensive (income) loss	1,269	1,132	363
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(1,464)	(1,535)
Defined Benefit Plan, Plan Assets, Divestiture	0	0
Service cost	7	8	12
Interest cost	40	49	45
Expected return on plan assets	0	0	0
Amortization of prior service credit	0	0	0
Amortization of unrecognized (gain) loss	(10)	(20)	(24)
Curtailment/settlement/other	0	(3)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Including Discontinued Operations	37	34	33
Net periodic benefit cost	37	34	30
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(8)	(145)	13
Prior service cost (credit)	0	0	0
Net (gain) loss	10	20	24
Prior service cost	0	0	0
Settlement loss	0	3	0
Total recognized in other comprehensive (income) loss	18	168	11
Total recognized in net periodic benefit cost and other comprehensive (income) loss	55	202	44
Discontinued Operations [Member] | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Divestiture	0	(61)
Net periodic benefit cost	0	21	101
Transfer of Business Under Common Control - Before Tax	0	(112)	0
Discontinued Operations [Member] | Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	0	0	3
Transfer of Business Under Common Control - Before Tax	$ 0	$ 0	$ 0

PENSION PLANS AND OTHER POSTR_9

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Estimated Future Benefit Payments) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 26,400	$ 24,900
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	26,406	24,908	$ 22,544
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	1,647
2022	1,595
2023	1,593
2024	1,604
2025	1,641
2026-2030	8,419
Total	16,499
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	$ 0	$ 0
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	114
2022	103
2023	102
2024	101
2025	100
2026-2030	449
Total	$ 969

PENSION PLANS AND OTHER POST_10

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Target Allocation for Plan Investment Strategy and Risk Management for Plan Assets)	12 Months Ended
	Dec. 31, 2020
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Defined Benefit Pension Plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	35.00%
Defined Benefit Pension Plans | Fixed Income securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	36.00%
Defined Benefit Pension Plans | Alternative Investments
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	28.00%
Defined Benefit Pension Plans | Other Investments
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	1.00%
Defined Benefit Plan Liability, Annuity Coverage
Defined Benefit Plan Disclosure [Line Items]
Concentration Risk, Percentage	31.00%

PENSION PLANS AND OTHER POST_11

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Basis of Fair Value Measurements of Pension Plan Assets) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 26,400	$ 24,900
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	26,406	24,908	$ 22,544
Subtotal	20,128	18,511
Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Subtotal	9,982	9,103
Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Subtotal	10,119	9,368
Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	40	41
Subtotal	27	40
Cash and Cash Equivalents | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,298	754
Cash and Cash Equivalents | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,103	675
Cash and Cash Equivalents | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	195	79
Cash and Cash Equivalents | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Equity [Member] | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	3,934	3,844
U.S. Equity [Member] | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	3,911	3,752
U.S. Equity [Member] | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	22	91
U.S. Equity [Member] | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	1	1
Non-U.S. Equity [Member] | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	5,186	4,646
Non-U.S. Equity [Member] | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	4,213	3,819
Non-U.S. Equity [Member] | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	964	801
Non-U.S. Equity [Member] | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	9	26
Equity securities | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,120	8,490
Equity securities | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,124	7,571
Equity securities | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	986	892
Equity securities | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	27	39
Government debt | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	4,998	4,992
Government debt | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	128	197
Government debt | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	4,870	4,795
Government debt | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0	0
Corporate bonds | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	3,970	3,697
Corporate bonds | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	553	607
Corporate bonds | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	3,416	3,089
Corporate bonds | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	1	1
Debt - asset-backed | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	103	70
Debt - asset-backed | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0	0
Debt - asset-backed | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	102	69
Debt - asset-backed | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	1	1
Total fixed income securities | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,071	8,759
Total fixed income securities | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	681	804
Total fixed income securities | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,388	7,953
Total fixed income securities | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2	1
Private Equity Funds | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Investments measured at NAV	3,135	2,794
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	13	11
Private Equity Funds | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0	0
Private Equity Funds | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0	0
Private Equity Funds | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	13	11
Real Estate | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Investments measured at NAV	1,886	2,110
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	51	25
Real Estate | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	51	25
Real Estate | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0	0
Real Estate | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0	0
Derivatives - asset position | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	697	574
Derivatives - asset position | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	2	2
Derivatives - asset position | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	695	572
Derivatives - asset position | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0	0
Derivatives - liability position | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	594	513
Derivatives - liability position | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	1	2
Derivatives - liability position | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	593	511
Derivatives - liability position | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0	0
Alternative Investments | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	167	97
Alternative Investments | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	52	25
Alternative Investments | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	102	61
Alternative Investments | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13	11	1
Other Investments | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	472	411
Other Investments | Defined Benefit Pension Plans | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22	28
Other Investments | Defined Benefit Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	448	383
Other Investments | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	0	$ 0
Hedge Funds | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Investments measured at NAV	1,350	1,595
Plan Assets, Retirement Plan, Total investments measured at NAV [Member] | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,371	6,499
Pension Trust Receivables [Member] | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	66	70
Pension Trust Payables [Member] | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ (159)	$ (172)

PENSION PLANS AND OTHER POST_12

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Fair Value Measurement of Level 3 Pension Plan Assets) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 26,400	$ 24,900
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	26,406	24,908	$ 22,544
Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	40	41
Plan Assets Sold	(11)	(2)
Plan Assets Still Held	6	(13)
Purchases, sales and settlements, net	(12)	14
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3	4
Equity securities | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,120	8,490
Equity securities | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	27	39
Plan Assets Sold	0	(2)
Plan Assets Still Held	(1)	1
Purchases, sales and settlements, net	(19)	(11)
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3	3
Fixed Income Securities | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,071	8,759
Fixed Income Securities | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2	1
Plan Assets Sold	0	0
Plan Assets Still Held	0	0
Purchases, sales and settlements, net	(1)	1
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3	1
Alternative Investments | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	167	97
Alternative Investments | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13	11	1
Plan Assets Sold	(11)	0
Plan Assets Still Held	8	(14)
Purchases, sales and settlements, net	5	24
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3	0
Other Investments | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	472	411
Other Investments | Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	0	$ 0
Plan Assets Sold	0	0
Plan Assets Still Held	(1)	0
Purchases, sales and settlements, net	3	$ 0
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3	$ 0

PENSION PLANS AND OTHER POST_13

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Defined Contribution Plans) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Defined Contribution Plan, Cost	$ 156	$ 163	$ 186

STOCK-BASED COMPENSATION (Accou

STOCK-BASED COMPENSATION (Accounting for Stock-Based Compensation) $ / shares in Units, shares in Millions, $ in Millions	Jun. 03, 2019employees	Apr. 01, 2019USD ($)employees	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)$ / shares	Dec. 31, 2018USD ($)$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Plan Modification, Incremental Cost		$ 0
Share-based Payment Arrangement, Expense			$ 171	$ 158	$ 188
Share-based Payment Arrangement, Expense, Tax Benefit			$ 39	$ 36	$ 42
Dividend yield			5.80%	5.10%	2.13%
Expected volatility			26.70%	26.10%	23.34%
Risk-free interest rate			1.49%	2.43%	2.83%
Common Stock, Dividends, Per Share, Cash Paid | $ / shares			$ 0.70	$ 0.70	$ 0.38
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense			$ 22	$ 23	$ 68
Share-based Payment Arrangement, Expense, Tax Benefit			$ 5	$ 5	$ 15
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term			6 years 1 month 6 days	6 years 1 month 6 days	6 years 2 months 12 days
Employee Stock Option | 2019 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares			16
Dow Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Plan Modification, Number of Grantees Affected | employees		5,000
Corteva [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Plan Modification, Number of Grantees Affected | employees	4,000

STOCK-BASED COMPENSATION (Stock

STOCK-BASED COMPENSATION (Stock Options) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 171	$ 158	$ 188
Share-based Payment Arrangement, Expense, Tax Benefit	$ 39	$ 36	$ 42
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum term by share based compensation after vesting	10 years
Weighted-average fair value per share of options granted	$ 5.89	$ 7.99	$ 15.38
Share-based Payment Arrangement, Expense	$ 22	$ 23	$ 68
Share-based Payment Arrangement, Expense, Tax Benefit	5	5	15
Total amount of cash received from the exercise of options	108	93	112
Total intrinsic value of options exercised	41	77	160
Share-based Payment Arrangement, Exercise of Option, Tax Benefit	9	$ 17	$ 36
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 8
Employee Service Share-based Compensation, Nonvested, Total Compensation Cost not yet recognized and period for recognition in years	1 year 4 months 2 days
Employee Stock Option | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Employee Stock Option | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
2019 Stock Incentive Plan [Member] | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	20,252	21,265
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted-Average Exercise Price	$ 47.44	$ 45.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	2,191
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted-Average Exercise Price	$ 48.30
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(3,002)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 36.78
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period	(202)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$ 59.70
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	4 years 7 months 17 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 209
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	16,564
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 46.11
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	3 years 9 months 3 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 192

STOCK-BASED COMPENSATION (Restr

STOCK-BASED COMPENSATION (Restricted Stock Units) - USD ($) $ / shares in Units, $ in Millions	Apr. 01, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense		$ 171	$ 158	$ 188
Share-based Payment Arrangement, Expense, Tax Benefit		$ 39	$ 36	$ 42
Share-based Payment Arrangement, Plan Modification, Incremental Cost	$ 0
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		3,007,000	2,454,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value		$ 53.78	$ 59.98
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		2,065,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 47.66	$ 54.78	$ 71.46
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period		(1,422,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value		$ 55.53
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period		(90,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value		$ 54.69
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 106	$ 264	$ 382
Employee Service Share-based Compensation, Tax Benefit Realized from Vesting of Deferred Stock Awards		24	59	86
Share-based Payment Arrangement, Expense		93	110	144
Share-based Payment Arrangement, Expense, Tax Benefit		21	25	32
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 75
Employee Service Share-based Compensation, Nonvested, Total Compensation Cost not yet recognized and period for recognition in years		1 year 8 months 8 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested But Not Issued		1,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested But Not Issued, Weighted Average Grant Date Fair Value		$ 53.91
Restricted Stock Units (RSUs) [Member] | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Restricted Stock Units (RSUs) [Member] | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		2 years
Executive Officer [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Redeemed or Called During Period, Value		$ 4	$ 19	$ 45
Stock Redeemed or Called During Period, Shares		85,000	341,000	625,000

STOCK-BASED COMPENSATION (Perfo

STOCK-BASED COMPENSATION (Performance Stock Units) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 171	$ 158	$ 188
Share-based Payment Arrangement, Expense, Tax Benefit	$ 39	$ 36	42
Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1,426,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 48.35
Actual number of shares granted above target minimum range	0.00%
Actual number of shares granted above target maximum range	200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	2,488,000	1,121,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 53.78	$ 57.58
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(59,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 53.09
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 0	$ 18	0
Employee Service Share-based Compensation, Tax Benefit Realized from Vesting of Performance Deferred Stock Awards	0	4	0
Share-based Payment Arrangement, Expense	56	25	12
Share-based Payment Arrangement, Expense, Tax Benefit	$ 13	$ 6	$ 3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	162,000	0
Total cash paid to settle PSUs	$ 0	$ 13	$ 0
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 31
Employee Service Share-based Compensation, Nonvested, Total Compensation Cost not yet recognized and period for recognition in years	1 year 8 months 1 day
Performance Stock Units (PSUs) [Member] | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Performance Stock Units (PSUs) [Member] | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
January 1, 2020 - December 31, 2020 | Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1,426,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 48.35
April 1, 2019 - December 31, 2019 [Member] | Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1,173,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 57.58
September 1, 2017 - August 31, 2019 [Member] [Member] | Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	232,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 71.16
January 1, 2016 - December 31, 2018 [Member] | Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1,728,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 81.99

STOCK-BASED COMPENSATION (Res_2

STOCK-BASED COMPENSATION (Restricted Stock) - Non-Employee Directors' Stock Incentive Plan 2012 [Member] - Restricted Stock [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Shares Issued	0	0	36
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value			$ 62.82

FINANCIAL INSTRUMENTS (Summary

FINANCIAL INSTRUMENTS (Summary of Fair Value of Financial Instruments) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Cash Equivalents, at Carrying Value	$ 1,464	$ 628
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0	0
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0	0
Cash Equivalents, Fair Value	1,464	628
Total, Amortized Cost	1,495	1,477
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	154	113
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(15)	(21)
Debt Securities, Available-for-sale	1,634	1,569
Equity securities	40	15
Other Investments and Securities, at Cost	1,501	1,487
Other Investments and Securities, Accumulated Gross Unrealized Gain, Before Tax	188	119
Other Investments and Securities, Accumulated Gross Unrealized Loss, Before Tax	(15)	(22)
Cash Equivalents, Marketable Securities and Other Investments, Amortized Cost Basis	3,010	2,136
Cash Equivalents, Marketable Securities and Other Investments, Accumulated Gross Unrealized Gain, Before Tax	188	119
Cash Equivalents, Marketable Securities and Other Investments, Accumulated Gross Unrealized Loss, Before Tax	(15)	(22)
Cash Equivalents, Marketable Securities and Other Investments, Fair Value	3,183	2,233
Long-term Debt	(16,951)	(16,410)
Long Term Debt, Accumulated Gross Unrealized Gain, Before Tax	6	7
Long Term Debt, Accumulated Gross Unrealized Loss, Before Tax	(3,659)	(2,258)
Long-term debt	(20,604)	(18,661)
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	173	168
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(350)	(419)
Derivative Assets (Liabilities), at Fair Value, Net	(177)	(251)
Long Term Debt, Accumulated Fair Value Adjustment	69	1
Derivative, Amount of Hedged Item	3,314	3,490
Investments carried at fair value	1,674	1,584
Interest rates 6
Debt Securities, Available-for-sale [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	41	8
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(182)	(283)
Derivative Assets (Liabilities), at Fair Value, Net	(141)	(275)
Foreign currency
Debt Securities, Available-for-sale [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	69	101
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(84)	(21)
Derivative Assets (Liabilities), at Fair Value, Net	(15)	80
Commodities
Debt Securities, Available-for-sale [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	63	59
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(84)	(115)
Derivative Assets (Liabilities), at Fair Value, Net	(21)	(56)
Government debt
Debt Securities, Available-for-sale [Line Items]
Total, Amortized Cost	673	533
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	35	33
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(10)	(11)
Debt Securities, Available-for-sale	698	555
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Total, Amortized Cost	822	944
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	119	80
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(5)	(10)
Debt Securities, Available-for-sale	936	1,014
Equity securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	6	10
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	34	6
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	0	(1)
Equity securities	40	15
Held-to-maturity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Cash Equivalents, at Carrying Value	980	220
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0	0
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0	0
Cash Equivalents, Fair Value	980	220
Money Market Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Cash Equivalents, at Carrying Value	484	408
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0	0
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0	0
Cash Equivalents, Fair Value	484	408
Marketable securities 2
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Current	45	21
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, Current, before Tax	0	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, Current, before Tax	0	0
Debt Securities, Available-for-sale, Current	$ 45	$ 21

FINANCIAL INSTRUMENTS (Investme

FINANCIAL INSTRUMENTS (Investments) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash and Cash Equivalents [Line Items]
Proceeds from sales of available-for-sale securities	$ 837	$ 1,138	$ 1,053
Gross realized gains	94	51	21
Gross realized losses	40	18	$ 30
Within one year, Amortized Cost	25
One to five years, Amortized Cost	406
Six to ten years, Amortized Cost	649
After ten years, Amortized Cost	415
Total, Amortized Cost	1,495	1,477
Within one year, Fair Value	25
One to five years, Fair Value	448
Six to ten years, Fair Value	685
After ten years, Fair Value	476
Total, Fair Value	1,634	1,569
Equity securities	40	15
Cost method investments, aggregate cost	$ 215	$ 189

FINANCIAL INSTRUMENTS (Temporar

FINANCIAL INSTRUMENTS (Temporarily Impaired Securities) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Securities, Less than 12 Months, Fair Value	$ 179	$ 134
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(6)	(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	19	75
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	198	209
Available-for-sale Securities, Continuous Unrealized Loss Position, More than 12 Months	(9)	(15)
Available-for-sale Securities, Continuous Unrealized Position	(15)	(21)
Equity securities	40	15
Cost method investments, aggregate cost	215	189
Net unrealized gain recognized in equity securities	32	5
Government debt
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Securities, Less than 12 Months, Fair Value	124	55
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3)	(3)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	7	23
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	131	78
Available-for-sale Securities, Continuous Unrealized Loss Position, More than 12 Months	(7)	(8)
Available-for-sale Securities, Continuous Unrealized Position	(10)	(11)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Securities, Less than 12 Months, Fair Value	55	79
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3)	(3)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	12	52
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	67	131
Available-for-sale Securities, Continuous Unrealized Loss Position, More than 12 Months	(2)	(7)
Available-for-sale Securities, Continuous Unrealized Position	(5)	(10)
Equity securities
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 40	$ 15

FINANCIAL INSTRUMENTS (Notional

FINANCIAL INSTRUMENTS (Notional Amounts) bbl in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)MWhbbl	Dec. 31, 2019USD ($)MWhbbl
Derivatives designated as hedging instruments: | Interest rates
Derivative [Line Items]
Derivative, Notional Amount	$ 612	$ 922
Derivatives designated as hedging instruments: | Foreign currency
Derivative [Line Items]
Derivative, Notional Amount	$ 3,784	$ 6,253
Derivatives designated as hedging instruments: | Hydrocarbon derivatives
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | bbl	10.9	6.1
Derivatives not designated as hedging instruments: | Interest rates
Derivative [Line Items]
Derivative, Notional Amount	$ 94	$ 145
Derivatives not designated as hedging instruments: | Foreign currency
Derivative [Line Items]
Derivative, Notional Amount	$ 9,187	$ 5,567
Derivatives not designated as hedging instruments: | Hydrocarbon derivatives
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | bbl	0	0.1
Derivatives not designated as hedging instruments: | Power derivatives
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Energy Measure | MWh	0	87.5

FINANCIAL INSTRUMENTS (Accounti

FINANCIAL INSTRUMENTS (Accounting for Derivative Instruments and Hedging Activities) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Nonderivative Instruments Notional	$ 194	$ 184

FINANCIAL INSTRUMENTS (Schedule

FINANCIAL INSTRUMENTS (Schedule of Fair Values of Derivative Instruments) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	$ (165)	$ (106)
Counterparty and Cash Collateral Netting	(171)	(111)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	7	5
Derivative Asset, Collateral, Obligation to Return Cash, Offset	0	3
Derivative Asset	(173)	(168)
Derivative Asset, Fair Value, Gross Asset	338	274
Derivative Liability, Fair Value, Gross Liability	521	530
Derivative Liability	(350)	(419)
Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(139)	(77)
Counterparty and Cash Collateral Netting	(143)	(82)
Derivative Asset	(80)	(121)
Derivative Asset, Fair Value, Gross Asset	219	198
Derivative Liability, Fair Value, Gross Liability	299	203
Derivative Liability	(156)	(121)
Derivatives designated as hedging instruments: | Foreign currency | Other current assets
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(19)	(36)
Derivative Asset	(20)	(69)
Derivative Asset, Fair Value, Gross Asset	39	105
Derivatives designated as hedging instruments: | Foreign currency | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(19)	(36)
Derivative Liability, Fair Value, Gross Liability	93	46
Derivative Liability	(74)	(10)
Derivatives designated as hedging instruments: | Commodities | Deferred charges and other assets [Member]
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(8)	(3)
Derivative Asset	(23)	(25)
Derivative Asset, Fair Value, Gross Asset	31	28
Derivatives designated as hedging instruments: | Commodities | Other current assets
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(109)	(25)
Derivative Asset	(37)	(19)
Derivative Asset, Fair Value, Gross Asset	146	44
Derivatives designated as hedging instruments: | Commodities | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(112)	(29)
Derivative Liability, Fair Value, Gross Liability	151	95
Derivative Liability	(39)	(66)
Derivatives designated as hedging instruments: | Commodities | Other noncurrent obligations
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(9)	(4)
Derivative Liability, Fair Value, Gross Liability	48	38
Derivative Liability	(39)	(34)
Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(26)	(29)
Counterparty and Cash Collateral Netting	(28)	(29)
Derivative Asset	(93)	(47)
Derivative Asset, Fair Value, Gross Asset	119	76
Derivative Liability, Fair Value, Gross Liability	222	327
Derivative Liability	(194)	(298)
Derivatives not designated as hedging instruments: | Foreign currency | Other current assets
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(25)	(12)
Derivative Asset	(49)	(32)
Derivative Asset, Fair Value, Gross Asset	74	44
Derivatives not designated as hedging instruments: | Foreign currency | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(25)	(12)
Derivative Liability, Fair Value, Gross Liability	35	23
Derivative Liability	(10)	(11)
Derivatives not designated as hedging instruments: | Commodities | Other current assets
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(1)	(3)
Derivative Asset	(3)	(15)
Derivative Asset, Fair Value, Gross Asset	4	18
Derivatives not designated as hedging instruments: | Commodities | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(3)	(3)
Derivative Liability, Fair Value, Gross Liability	9	17
Derivative Liability	(6)	(14)
Derivatives not designated as hedging instruments: | Commodities | Other noncurrent obligations
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting		0
Derivative Liability, Fair Value, Gross Liability		1
Derivative Liability		(1)
Fair Value, Inputs, Level 2 [Member] | Derivatives designated as hedging instruments: | Interest rates 6 | Other current assets
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	(3)	(13)
Derivative Asset	0	(8)
Derivative Asset, Fair Value, Gross Asset	3	21
Fair Value, Inputs, Level 2 [Member] | Derivatives designated as hedging instruments: | Interest rates 6 | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	7	23
Counterparty and Cash Collateral Netting	(3)	(13)
Derivative Liability	(4)	(10)
Fair Value, Inputs, Level 2 [Member] | Derivatives designated as hedging instruments: | Interest rates 6 | Other noncurrent obligations
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		1
Counterparty and Cash Collateral Netting		0
Derivative Liability		(1)
Fair Value, Inputs, Level 2 [Member] | Derivatives not designated as hedging instruments: | Interest rates 6 | Deferred charges and other assets [Member]
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting	0
Derivative Asset	(41)
Derivative Asset, Fair Value, Gross Asset	41
Fair Value, Inputs, Level 2 [Member] | Derivatives not designated as hedging instruments: | Interest rates 6 | Other current assets
Derivatives, Fair Value [Line Items]
Counterparty and Cash Collateral Netting		(14)
Derivative Asset		0
Derivative Asset, Fair Value, Gross Asset		14
Fair Value, Inputs, Level 2 [Member] | Derivatives not designated as hedging instruments: | Interest rates 6 | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		136
Counterparty and Cash Collateral Netting		(14)
Derivative Liability		(122)
Fair Value, Inputs, Level 2 [Member] | Derivatives not designated as hedging instruments: | Interest rates 6 | Other noncurrent obligations
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	178	150
Counterparty and Cash Collateral Netting	0	0
Derivative Liability	$ (178)	$ (150)

FINANCIAL INSTRUMENTS (Effect o

FINANCIAL INSTRUMENTS (Effect of Derivative Instruments) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	$ (32)	$ (189)	$ 112
Total derivatives	82	85	(1)
Derivatives designated as hedging instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	(32)	(189)	112
Amount of gain (loss) recognized in income	59	72	(90)
Derivatives designated as hedging instruments: | Fair value hedges: | Interest rates
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	0	0	0
Derivatives designated as hedging instruments: | Fair value hedges: | Excluded Components [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives used in Net Investment Hedge, Gain (Loss), Reclassified to Earnings, Net of Tax	0	0	0
Derivatives designated as hedging instruments: | Fair value hedges: | Interest expense and amortization of debt discount 3 | Interest rates
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income	69	17	0
Derivatives designated as hedging instruments: | Cash flow hedges: | Interest rates
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	0	(316)	26
Derivatives designated as hedging instruments: | Cash flow hedges: | Commodities
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	(8)	(6)	(46)
Derivatives designated as hedging instruments: | Cash flow hedges: | Interest expense and amortization of debt discount 3 | Interest rates
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income	(2)	1	(3)
Derivatives designated as hedging instruments: | Cash flow hedges: | Cost of sales | Foreign currency
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	(20)	16	19
Amount of gain (loss) recognized in income	3	28	(18)
Derivatives designated as hedging instruments: | Cash flow hedges: | Cost of sales | Commodities
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income	(31)	(81)	(69)
Derivatives designated as hedging instruments: | Cash flow hedges: | Sundry income (expense) - net | Foreign currency
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	0	10	(3)
Amount of gain (loss) recognized in income	0	8	0
Derivatives designated as hedging instruments: | Net foreign investment hedges: | Foreign currency
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	(38)	(52)	116
Amount of gain (loss) recognized in income	0	0	0
Derivatives designated as hedging instruments: | Net foreign investment hedges: | Sundry income (expense) - net | Excluded Components [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives used in Net Investment Hedge, Gain (Loss), Reclassified to Earnings, Net of Tax	20	99	0
Derivatives not designated as hedging instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	0	0	0
Amount of gain (loss) recognized in income	23	13	89
Derivatives not designated as hedging instruments: | Interest rates 6
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	0	0	0
Derivatives not designated as hedging instruments: | Foreign currency
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	0	0	0
Derivatives not designated as hedging instruments: | Commodities
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	0	0	0
Derivatives not designated as hedging instruments: | Interest expense and amortization of debt discount 3 | Interest rates 6
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income	(16)	(4)	0
Derivatives not designated as hedging instruments: | Cost of sales | Commodities
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income	11	(28)	(12)
Derivatives not designated as hedging instruments: | Sundry income (expense) - net | Foreign currency
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income	28	45	101
Cumulative Translation Adjustments [Member] | Derivatives designated as hedging instruments: | Fair value hedges: | Excluded Components [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	7	(3)	0
Cumulative Translation Adjustments [Member] | Derivatives designated as hedging instruments: | Net foreign investment hedges: | Excluded Components [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	$ 27	$ 162	$ 0

FINANCIAL INSTRUMENTS (Expected

FINANCIAL INSTRUMENTS (Expected Reclassification) $ in Millions	Dec. 31, 2020USD ($)
Interest rates 6
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ (8)
Commodities
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months	(1)
Foreign currency
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	(18)
Excluded Components [Member]
Hedge Gain (Loss) to be Reclassified During Next 12 Months, Excluded Components, Net	$ 2

FAIR VALUE MEASUREMENTS (Basis

FAIR VALUE MEASUREMENTS (Basis of Fair Value Measurements on a Recurring Basis) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 40	$ 15
Debt securities	1,634	1,569
Derivative Asset, Fair Value, Gross Asset	338	274
Long-term debt including debt due within one year	20,604	18,661
Derivative Liability, Fair Value, Gross Liability	521	530
Government debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	698	555
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	936	1,014
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities 2	45	21
Equity securities	40	15
Total assets at fair value	3,521	2,507
Long-term debt including debt due within one year	20,604	18,661
Total liabilities at fair value	21,125	19,191
Fair Value, Measurements, Recurring | Interest rates 6
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	44	35
Fair Value, Measurements, Recurring | Foreign currency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	113	149
Derivative Liability, Fair Value, Gross Liability	128	69
Fair Value, Measurements, Recurring | Commodities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	181	90
Derivative Liability, Fair Value, Gross Liability	208	151
Fair Value, Measurements, Recurring | Interest rates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability	185	310
Fair Value, Measurements, Recurring | Government debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	698	555
Fair Value, Measurements, Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	936	1,014
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities 2	0	0
Equity securities	40	15
Total assets at fair value	76	60
Long-term debt including debt due within one year	0	0
Total liabilities at fair value	7	14
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1) | Interest rates 6
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1) | Foreign currency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1) | Commodities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	8	23
Derivative Liability, Fair Value, Gross Liability	7	14
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1) | Interest rates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1) | Government debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	28	22
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities 2	45	21
Equity securities	0	0
Total assets at fair value	3,445	2,447
Long-term debt including debt due within one year	20,604	18,661
Total liabilities at fair value	21,118	19,177
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rates 6
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	44	35
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	113	149
Derivative Liability, Fair Value, Gross Liability	128	69
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commodities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	173	67
Derivative Liability, Fair Value, Gross Liability	201	137
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability	185	310
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Government debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	698	555
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	908	992
Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	980	220
Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	980	220
Money Market Funds [Member] | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	484	408
Money Market Funds [Member] | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Items (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Money Market Funds [Member] | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 484	$ 408

FAIR VALUE MEASUREMENTS (Additi

FAIR VALUE MEASUREMENTS (Additional Information) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$ 0				$ 0				$ 0	$ 0
Noncash settlement transactions											$ 23
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Restructuring, goodwill impairment and asset related charges - net	(11)	$ 617	$ 6	$ 96	2,851	$ 147	$ 65	$ 156	708	3,219	221
Asset Impairment Charges									49
Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Jan 1								$ 0		0	677
Gain (loss) included in earnings											3
Settlements											(680)
Balance at Dec 31											$ 0
Fair Value, Measurements, Nonrecurring | Fair Value Measured at Net Asset Value Per Share | Private Market Securities and Real Estate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unfunded commitments on investments	63				76				63	76
Fair Value, Measurements, Nonrecurring | Fair Value Measured at Net Asset Value Per Share | Private Market Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets at fair value:	111				117				111	117
Fair Value, Measurements, Nonrecurring | Fair Value Measured at Net Asset Value Per Share | Real Estate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets at fair value:	$ 19				$ 18				$ 19	$ 18

FAIR VALUE MEASUREMENTS (Basi_2

FAIR VALUE MEASUREMENTS (Basis of Fair Value Measurements on a Nonrecurring Basis) - USD ($) $ in Millions

3 Months Ended

6 Months Ended

12 Months Ended

40 Months Ended

Dec. 31, 2020

Sep. 30, 2020

Jun. 30, 2020

Mar. 31, 2020

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2020

Dec. 31, 2020

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2020

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

$ (11)

$ 617

$ 6

$ 96

$ 2,851

$ 147

$ 65

$ 156

$ 708

$ 3,219

$ 221

Asset Impairment Charges

49

Goodwill, Impairment Loss

(1,039)

The Dow Chemical Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

708

3,219

221

DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

90

292

184

$ 961

2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

575

$ 573

2020 Restructuring Program [Member] | The Dow Chemical Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

573

Performance Materials & Coatings [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

192

1,076

21

Goodwill, Impairment Loss

(1,039)

(1,039)

Performance Materials & Coatings [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

28

7

Performance Materials & Coatings [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

177

Corporate Segment [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

464

529

143

Corporate Segment [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

90

256

153

Corporate Segment [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

363

Packaging & Specialty Plastics [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

30

439

46

Goodwill, Impairment Loss

0

Packaging & Specialty Plastics [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

1

13

Packaging & Specialty Plastics [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

11

Industrial Intermediates & Infrastructure [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

22

1,175

11

Goodwill, Impairment Loss

0

Industrial Intermediates & Infrastructure [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

7

11

Industrial Intermediates & Infrastructure [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

22

Property, Plant and Equipment | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

33

Property, Plant and Equipment | Restructuring Charges

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

33

Manufacturing Facility

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

58

Manufacturing Facility | Performance Materials & Coatings [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

9

Manufacturing Facility | Corporate Segment [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

5

Manufacturing Facility | Packaging & Specialty Plastics [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

44

34

Fair Value, Measurements, Nonrecurring | Performance Materials & Coatings [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

15

Fair Value, Measurements, Nonrecurring | Corporate Segment [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

15

Fair Value, Measurements, Nonrecurring | Packaging & Specialty Plastics [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

19

Fair Value, Measurements, Nonrecurring | Manufacturing Facility | Packaging & Specialty Plastics [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

19

44

Fair Value, Measurements, Nonrecurring | Non-manufacturing Assets [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

30

14

Fair Value, Measurements, Nonrecurring | Non-manufacturing Assets [Member] | Performance Materials & Coatings [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

15

9

Fair Value, Measurements, Nonrecurring | Non-manufacturing Assets [Member] | Corporate Segment [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

15

5

Fair Value, Measurements, Nonrecurring | Manufacturing Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

75

Fair Value, Measurements, Nonrecurring | Manufacturing Assets | Corporate Segment [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

51

Fair Value, Measurements, Nonrecurring | Manufacturing Assets | Packaging & Specialty Plastics [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Asset Impairment Charges

24

Fair Value, Measurements, Nonrecurring | Changes Measurement [Member] | Manufacturing Assets, Equity Method Investments, and Other Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

(2,031)

(2,031)

Fair Value, Measurements, Nonrecurring | Changes Measurement [Member] | Non-manufacturing Assets [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

(245)

(245)

(245)

(67)

(245)

Fair Value, Measurements, Nonrecurring | Changes Measurement [Member] | Goodwill [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

(1,039)

(1,039)

Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 [Member] | Leased, Non-manufacturing Facilities [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

110

152

110

110

152

110

Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 [Member] | Manufacturing Assets, Equity Method Investments, and Other Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

162

162

Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 [Member] | Manufacturing Facility

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

0

Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 [Member] | Non-manufacturing Assets [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

11

10

11

11

10

0

11

Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 [Member] | Goodwill [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

0

0

Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 [Member] | Leased Assets and Non-Manufacturing Facilities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Total assets at fair value

$ 121

121

121

121

Sadara Chemical Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

$ 1,755

1,755

Sadara Chemical Company | Corporate Segment [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

217

Sadara Chemical Company | Packaging & Specialty Plastics [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

370

Sadara Chemical Company | Industrial Intermediates & Infrastructure [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

1,168

Asset write-downs and write-offs [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

0

143

33

$ 263

Asset write-downs and write-offs [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

$ 197

196

Asset write-downs and write-offs [Member] | 2020 Restructuring Program [Member] | The Dow Chemical Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

196

Asset write-downs and write-offs [Member] | Performance Materials & Coatings [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

28

7

Asset write-downs and write-offs [Member] | Performance Materials & Coatings [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

116

Asset write-downs and write-offs [Member] | Performance Materials & Coatings [Member] | 2020 Restructuring Program [Member] | The Dow Chemical Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

116

Asset write-downs and write-offs [Member] | Corporate Segment [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

$ 0

113

16

Asset write-downs and write-offs [Member] | Corporate Segment [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

47

Asset write-downs and write-offs [Member] | Corporate Segment [Member] | 2020 Restructuring Program [Member] | The Dow Chemical Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

47

Asset write-downs and write-offs [Member] | Packaging & Specialty Plastics [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

0

10

Asset write-downs and write-offs [Member] | Packaging & Specialty Plastics [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

11

Asset write-downs and write-offs [Member] | Packaging & Specialty Plastics [Member] | 2020 Restructuring Program [Member] | The Dow Chemical Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

11

Asset write-downs and write-offs [Member] | Industrial Intermediates & Infrastructure [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

$ 2

0

Asset write-downs and write-offs [Member] | Industrial Intermediates & Infrastructure [Member] | 2020 Restructuring Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

22

Asset write-downs and write-offs [Member] | Industrial Intermediates & Infrastructure [Member] | 2020 Restructuring Program [Member] | The Dow Chemical Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

$ 22

Asset Related Charges and Other, Miscellaneous Asset Write-Down and Write-Offs [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

33

Asset Related Charges and Other, Miscellaneous Asset Write-Down and Write-Offs [Member] | Performance Materials & Coatings [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

7

Asset Related Charges and Other, Miscellaneous Asset Write-Down and Write-Offs [Member] | Corporate Segment [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

16

Asset Related Charges and Other, Miscellaneous Asset Write-Down and Write-Offs [Member] | Packaging & Specialty Plastics [Member] | DowDuPont Cost Synergy Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Restructuring, Settlement and Impairment Provisions

$ 10

VARIABLE INTEREST ENTITIES (Sch

VARIABLE INTEREST ENTITIES (Schedule of Consolidated Variable Interest Entities, Carrying Amounts of Assets and Liabilities) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Oct. 01, 2019
Variable Interest Entity [Line Items]
Payments to Noncontrolling Interests		$ 0	$ 297	$ 0
Cash and cash equivalents at end of year	$ 2,367	5,104	2,367	2,724
Other current assets	16,815	19,084	16,815
Net property	20,996	20,239	20,996	$ 21,418
Other noncurrent assets	818	1,249	818
Total Assets	60,524	61,470	60,524
Current liabilities (less than $1 million at 12/31/2017)	10,679	11,108	10,679
Long-term debt	15,975	16,491	15,975
Other noncurrent obligations	6,547	6,279	6,547
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents at end of year	37	26	37
Other current assets	51	44	51
Net property	330	232	330
Other noncurrent assets	18	17	18
Total Assets	436	319	436
Current liabilities (less than $1 million at 12/31/2017)	141	73	141
Long-term debt	34	6	34
Other noncurrent obligations	21	18	21
Liabilities	196	$ 97	$ 196
MTP HPPO [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity Purchase Amount					$ 331
Payments to Noncontrolling Interests	$ 166

VARIABLE INTEREST ENTITIES (Non

VARIABLE INTEREST ENTITIES (Nonconsolidated Variable Interest Entity) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Investment in nonconsolidated affiliates	$ 1,327	$ 1,404	$ 3,320
Silicon Inputs Joint Ventures [Member]
Variable Interest Entity [Line Items]
Investment in nonconsolidated affiliates	$ 107	$ 100

RELATED PARTY TRANSACTIONS - Na

RELATED PARTY TRANSACTIONS - Narrative - The Dow Chemical Company - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Dow Inc. [Member]
Related Party Transaction [Line Items]
Dividends declared and paid	$ 2,233	$ 201
DowDuPont
Related Party Transaction [Line Items]
Dividends declared and paid		$ 535	$ 3,711

RELATED PARTY TRANSACTIONS - Sc

RELATED PARTY TRANSACTIONS - Schedules of Related Party Transactions - The Dow Chemical Company - DuPont and its Affiliates - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Net sales	$ 12	$ 55
Cost of sales	$ 9	$ 42

SEGMENTS AND GEOGRAPHIC REGIO_3

SEGMENTS AND GEOGRAPHIC REGIONS Other	Dec. 31, 2020employeesmanufacturingsitescountries
Number of Manufacturing Sites | manufacturingsites	106
Number of Countries With Manufacturing Sites | countries	31
Entity Number of Employees | employees	35,700

SEGMENTS AND GEOGRAPHIC REGIO_4

SEGMENTS AND GEOGRAPHIC REGIONS Geographic Region Information - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 10,706	$ 9,712	$ 8,354	$ 9,770	$ 10,204	$ 10,764	$ 11,014	$ 10,969	$ 38,542	$ 42,951	$ 49,604
Net property	20,239				20,996				20,239	20,996	21,418
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									12,547	14,437	16,613
Net property	13,833				14,571				13,833	14,571	14,750
Europe, Middle East, Africa and India [Domain]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									12,969	14,612	17,406
Net property	2,813				2,649				2,813	2,649	2,657
Rest of World [Domain]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									13,026	13,902	15,585
Net property	$ 3,593				$ 3,776				$ 3,593	$ 3,776	$ 4,011

SEGMENTS AND GEOGRAPHIC REGIO_5

SEGMENTS AND GEOGRAPHIC REGIONS Segment Reporting Information - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 10,706	$ 9,712	$ 8,354	$ 9,770	$ 10,204	$ 10,764	$ 11,014	$ 10,969	$ 38,542	$ 42,951	$ 49,604
Business Acquisition, Pro Forma Revenue										42,998	49,852
Restructuring, goodwill impairment and asset related charges - net	(11)	$ 617	$ 6	$ 96	2,851	$ 147	$ 65	$ 156	708	3,219	221
Equity in earnings (losses) of nonconsolidated affiliates									(18)	(94)	555
Operating EBIT									2,715
Pro Forma Operating EBIT										4,352	6,236
Depreciation and amortization									2,874	2,938	2,909
Total Assets	61,470				60,524				61,470	60,524
Total Assets, Excluding Discontinued Operations											63,799
Investment in nonconsolidated affiliates	1,327				1,404				1,327	1,404	3,320
Capital expenditures									1,252	1,961	2,091
Disposal Group, Including Discontinued Operation, Assets											19,900
Packaging & Specialty Plastics [Member]
Segment Reporting Information [Line Items]
Net sales									18,301	20,245	24,195
Business Acquisition, Pro Forma Revenue										20,245	24,237
Restructuring, goodwill impairment and asset related charges - net									30	439	46
Equity in earnings (losses) of nonconsolidated affiliates									173	162	287
Operating EBIT									2,325
Pro Forma Operating EBIT										2,904	3,593
Depreciation and amortization									1,372	1,435	1,385
Total Assets	30,069				29,522				30,069	29,522
Total Assets, Excluding Discontinued Operations											30,279
Investment in nonconsolidated affiliates	661				675				661	675	1,278
Capital expenditures									678	1,039	1,231
Industrial Intermediates & Infrastructure [Member]
Segment Reporting Information [Line Items]
Net sales									12,021	13,440	15,447
Business Acquisition, Pro Forma Revenue										13,449	15,465
Restructuring, goodwill impairment and asset related charges - net									22	1,175	11
Equity in earnings (losses) of nonconsolidated affiliates									(166)	(241)	284
Operating EBIT									355
Pro Forma Operating EBIT										845	1,767
Depreciation and amortization									605	594	607
Total Assets	12,220				11,753				12,220	11,753
Total Assets, Excluding Discontinued Operations											14,092
Investment in nonconsolidated affiliates	531				568				531	568	1,850
Capital expenditures									268	452	433
Performance Materials & Coatings [Member]
Segment Reporting Information [Line Items]
Net sales									7,951	8,923	9,677
Business Acquisition, Pro Forma Revenue										8,961	9,865
Restructuring, goodwill impairment and asset related charges - net									192	1,076	21
Equity in earnings (losses) of nonconsolidated affiliates									6	5	4
Operating EBIT									314
Pro Forma Operating EBIT										918	1,246
Depreciation and amortization									870	877	888
Total Assets	13,915				14,059				13,915	14,059
Total Assets, Excluding Discontinued Operations											16,050
Investment in nonconsolidated affiliates	108				101				108	101	99
Capital expenditures									306	470	427
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net sales									269	343	285
Business Acquisition, Pro Forma Revenue										343	285
Restructuring, goodwill impairment and asset related charges - net									464	529	143
Equity in earnings (losses) of nonconsolidated affiliates									(31)	(20)	(20)
Operating EBIT									(279)
Pro Forma Operating EBIT										(315)	(370)
Depreciation and amortization									27	32	29
Total Assets	5,266				5,190				5,266	5,190
Total Assets, Excluding Discontinued Operations											3,378
Investment in nonconsolidated affiliates	$ 27				$ 60				27	60	93
Capital expenditures									$ 0	$ 0	$ 0

SEGMENTS AND GEOGRAPHIC REGIO_6

SEGMENTS AND GEOGRAPHIC REGIONS EBIT Reconciliation - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting [Abstract]
Income (loss) from continuing operations, net of tax	$ (2,310)	$ 347	$ 90	$ 156	$ 1,294	$ (1,717)	$ 2,940
Provision for income taxes on continuing operations					777	470	809
Income (loss) from continuing operations before income taxes					2,071	(1,247)	3,749
Interest income					38	81	82
Interest expense and amortization of debt discount					827	933	1,063
Pro Forma Adjustments						65	180
Other Nonrecurring (Income) Expense					145	(4,682)	(1,326)
Operating EBIT					$ 2,715
Pro Forma Operating EBIT						$ 4,352	$ 6,236

SEGMENTS AND GEOGRAPHIC REGIO_7

SEGMENTS AND GEOGRAPHIC REGIONS Significant Items - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Gain (Loss) Related to Litigation Settlement		$ 544	$ 205
Charges related to separation, distribution and tax matters agreements		(21)	(144)
Gain (loss) on divestiture		717	(49)
Integration and separation costs		(239)	(1,013)	$ (1,074)
Restructuring, goodwill impairment and asset related charges - net		(708)	(3,219)	(198)
Loss on early extinguishment of debt		(149)	(102)	(54)
Accrual for Environmental Loss Contingencies, Revision in Estimates	$ 399		(399)
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties		11	39
Other Nonrecurring (Income) Expense		145	(4,682)	(1,326)
Restructuring Implementation Costs		(10)
Packaging & Specialty Plastics [Member]
Gain (Loss) Related to Litigation Settlement		544	170
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net				0
Charges related to separation, distribution and tax matters agreements		0	0
Gain (loss) on divestiture		52	0	0
Integration and separation costs		0	0	0
Restructuring, goodwill impairment and asset related charges - net		(30)	(439)	(46)
Loss on early extinguishment of debt		0	0	0
Accrual for Environmental Loss Contingencies, Revision in Estimates	5		(5)
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties		0	0
Other Nonrecurring (Income) Expense		566	(274)	(46)
Restructuring Implementation Costs		0
Industrial Intermediates & Infrastructure [Member]
Gain (Loss) Related to Litigation Settlement		0	0
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net				0
Charges related to separation, distribution and tax matters agreements		0	0
Gain (loss) on divestiture		61	(5)	20
Integration and separation costs		0	0	0
Restructuring, goodwill impairment and asset related charges - net		(22)	(1,175)	(11)
Loss on early extinguishment of debt		0	0	0
Accrual for Environmental Loss Contingencies, Revision in Estimates	8		(8)
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties		0	0
Other Nonrecurring (Income) Expense		39	(1,188)	9
Restructuring Implementation Costs		0
Performance Materials & Coatings [Member]
Gain (Loss) Related to Litigation Settlement		0	0
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net				(20)
Charges related to separation, distribution and tax matters agreements		0	0
Gain (loss) on divestiture		0	0	0
Integration and separation costs		0	0	0
Restructuring, goodwill impairment and asset related charges - net		(192)	(1,076)	(21)
Loss on early extinguishment of debt		0	0	0
Accrual for Environmental Loss Contingencies, Revision in Estimates	50		(50)
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties		0	0
Other Nonrecurring (Income) Expense		(192)	(1,126)	(41)
Restructuring Implementation Costs		0
Corporate Segment [Member]
Gain (Loss) Related to Litigation Settlement		0	35
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net				0
Charges related to separation, distribution and tax matters agreements		(21)	(144)
Gain (loss) on divestiture		604	(44)	0
Integration and separation costs		(239)	(1,013)	(1,074)
Restructuring, goodwill impairment and asset related charges - net		(464)	(529)	(120)
Loss on early extinguishment of debt		(149)	(102)	(54)
Accrual for Environmental Loss Contingencies, Revision in Estimates	$ 336		(336)
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties		11	39
Other Nonrecurring (Income) Expense		(268)	(2,094)	(1,248)
Restructuring Implementation Costs		(10)
Dow Silicones Corporation
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net		$ 0	$ 0	(20)
MEGlobal
Gain (loss) on divestiture				$ 20

SELECTED QUARTERLY FINANCIAL _3

SELECTED QUARTERLY FINANCIAL DATA Quarterly Financial Information Disclosure - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 10,706	$ 9,712	$ 8,354	$ 9,770	$ 10,204	$ 10,764	$ 11,014	$ 10,969	$ 38,542	$ 42,951	$ 49,604
Cost of sales	9,135	8,371	7,610	8,230	8,718	9,377	9,420	9,142	33,346	36,657	41,074
Gross margin	1,571	1,341	744	1,540	1,486	1,387	1,594	1,827	5,196	6,294
Restructuring, goodwill impairment and asset related charges - net	(11)	617	6	96	2,851	147	65	156	708	3,219	221
Business Combination, Integration And Separation Related Costs	65	63	46	65	99	164	348	452	239	1,063	1,179
Income (loss) from continuing operations, net of tax					(2,310)	347	90	156	1,294	(1,717)	2,940
Income from discontinued operations, net of tax					0	0	0	445	0	445	1,835
Net income (loss)	1,254	(1)	(217)	258	(2,310)	347	90	601	1,294	(1,272)	4,775
Net income (loss) available for The Dow Chemical Company common stockholder	$ 1,236	$ (25)	$ (225)	$ 239	$ (2,323)	$ 333	$ 75	$ 556	$ 1,225	$ (1,359)	$ 4,641
Earnings (loss) per common share from continuing operations - basic	$ 1.66	$ (0.04)	$ (0.31)	$ 0.32	$ (3.14)	$ 0.45	$ 0.10	$ 0.16	$ 1.64	$ (2.42)	$ 3.80
Earnings (loss) per common share from continuing operations - diluted	1.65	(0.04)	(0.31)	0.32	(3.14)	0.45	0.10	$ 0.16	1.64	(2.42)	3.80
Dividends declared per share of common stock	0.70	0.70	0.70	0.70	0.70	0.70	0.70		2.80	2.10	$ 0
Maximum
Condensed Financial Statements, Captions [Line Items]
Share Price	57.73	51.07	45.90	53.75	55.99	52.79	59.71		57.73	55.99
Minimum
Condensed Financial Statements, Captions [Line Items]
Share Price	$ 45.18	$ 39.44	$ 27.04	$ 22	$ 43.85	$ 40.71	$ 46.76		$ 45.18	$ 43.85
The Dow Chemical Company
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 10,706	$ 9,712	$ 8,354	$ 9,770	$ 10,204	$ 10,764	$ 11,014	$ 10,969	$ 38,542	$ 42,951
Cost of sales	9,134	8,371	7,608	8,230	8,719	9,377	9,419	9,142	33,343	36,657
Gross margin	1,572	1,341	746	1,540	1,485	1,387	1,595	1,827	5,199	6,294
Restructuring, goodwill impairment and asset related charges - net	(11)	617	6	96	2,851	147	65	156	708	3,219
Business Combination, Integration And Separation Related Costs	65	63	46	65	99	164	324	452	239	1,039
Income (loss) from continuing operations, net of tax					(2,292)	324	217	156		(1,595)
Income from discontinued operations, net of tax					0	0	0	445		445
Net income (loss)	1,264	(1)	(217)	258	(2,292)	324	217	601	1,304	(1,150)	$ 4,775
Net income (loss) available for The Dow Chemical Company common stockholder	$ 1,246	$ (25)	$ (225)	$ 239	$ (2,305)	$ 310	$ 202	$ 556	$ 1,235	$ (1,237)

VALUATION AND QUALIFYING ACCO_2

VALUATION AND QUALIFYING ACCOUNTS (Schedule of Valuation and Qualifying Accounts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable - Allowance for Doubtful Receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 45	$ 42	$ 59
Additions charged to expenses	22	24	10
Additions charged to other accounts	0	0	4
Deductions from reserves	(16)	(21)	(31)
Balance at end of year	51	45	42
Accounts Receivable - Allowance for Doubtful Receivables | Sadara Chemical Company
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Additions charged to expenses	2
Inventory - Obsolescence Reserve
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	35	23	18
Additions charged to expenses	2	19	7
Deductions from reserves	(14)	(7)	(2)
Balance at end of year	23	35	23
Reserves for Other Investments and Noncurrent Receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	2,215	460	430
Additions charged to expenses	7	1,758	44
Deductions from reserves	(129)	(3)	(14)
Balance at end of year	2,093	2,215	460
Reserves for Other Investments and Noncurrent Receivables | Sadara Chemical Company
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Additions charged to expenses	1,753
Deferred Tax Assets - Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	1,262	1,225	1,255
Additions charged to expenses	313	140	152
Deductions from reserves	(273)	(103)	(182)
Balance at end of year	$ 1,302	$ 1,262	$ 1,225