RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET (2025 Program) (Details)	3 Months Ended										12 Months Ended			36 Months Ended
	Dec. 31, 2025 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											$ 1,856,000,000	$ 103,000,000	$ 528,000,000
Additional accruals											$ 146,000,000	45,000,000
2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related workforce reduction	1,500										1,500			1,500
Restructuring, goodwill impairment and asset related charges - net	$ 13,000,000	$ 23,000,000	$ 591,000,000								$ 862,000,000
Restructuring Reserve, Settled without Cash											(473,000,000)
Payments for Restructuring											(126,000,000)
Restructuring Reserve	263,000,000										263,000,000			$ 263,000,000
Additional accruals											105,000,000
2025 Restructuring Program | Accrued and Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	123,000,000										123,000,000			123,000,000
2025 Restructuring Program | Other Noncurrent Obligations
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 140,000,000										$ 140,000,000			$ 140,000,000
2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related workforce reduction	2,000										2,000			2,000
Restructuring, goodwill impairment and asset related charges - net								$ 14,000,000	$ 8,000,000	$ 541,000,000	$ 1,000,000	66,000,000	535,000,000	$ 602,000,000
Restructuring Reserve, Settled without Cash											(1,000,000)	(25,000,000)	(191,000,000)
Payments for Restructuring											(60,000,000)	(103,000,000)	(222,000,000)
Restructuring Reserve	$ 0				$ 60,000,000			122,000,000			0	60,000,000	122,000,000	0
Costs Associated with Exit and Disposal Activities [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net	6,000,000	15,000,000	103,000,000								124,000,000
Restructuring Reserve, Settled without Cash											(124,000,000)
Payments for Restructuring											0
Restructuring Reserve	0										0			0
Costs Associated with Exit and Disposal Activities [Member] | 2025 Restructuring Program | Additional Cash Expenditures
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	60,000,000										60,000,000			60,000,000
Costs Associated with Exit and Disposal Activities [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											0	9,000,000	0	9,000,000
Restructuring Reserve, Settled without Cash											0	(9,000,000)	0
Payments for Restructuring											0	0	0
Restructuring Reserve	0				0			0			0	0	0	0
Restructuring Implementation Costs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring											(53,000,000)
Restructuring Implementation Costs | 2025 Restructuring Program | Additional Cash Expenditures
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	200,000,000										200,000,000			200,000,000
Restructuring Implementation Costs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring											(50,000,000)	(230,000,000)
Severance and Related Benefit Costs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net			154,000,000								389,000,000
Restructuring Reserve, Settled without Cash											0
Payments for Restructuring											(126,000,000)
Restructuring Reserve	263,000,000										263,000,000			263,000,000
Severance and Related Benefit Costs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											0	41,000,000	344,000,000	385,000,000
Restructuring Reserve, Settled without Cash											0	0	0
Payments for Restructuring											(60,000,000)	(103,000,000)	(222,000,000)
Restructuring Reserve	0				60,000,000			122,000,000			0	60,000,000	122,000,000	0
Asset Write-downs and Write-offs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net	7,000,000	$ 8,000,000	$ 334,000,000								349,000,000
Restructuring Reserve, Settled without Cash											(349,000,000)
Payments for Restructuring											0
Restructuring Reserve	0										0			0
Asset Write-downs and Write-offs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											1,000,000	16,000,000	191,000,000	208,000,000
Restructuring Reserve, Settled without Cash											(1,000,000)	(16,000,000)	(191,000,000)
Payments for Restructuring											0	0	0
Restructuring Reserve	0				0			$ 0			0	0	0	$ 0
Packaging & Specialty Plastics [Member] | Costs Associated with Exit and Disposal Activities [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											77,000,000
Packaging & Specialty Plastics [Member] | Costs Associated with Exit and Disposal Activities [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net													0
Packaging & Specialty Plastics [Member] | Severance and Related Benefit Costs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											0
Packaging & Specialty Plastics [Member] | Severance and Related Benefit Costs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net													0
Packaging & Specialty Plastics [Member] | Asset Write-downs and Write-offs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											88,000,000
Packaging & Specialty Plastics [Member] | Asset Write-downs and Write-offs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net													1,000,000
Industrial Intermediates & Infrastructure [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											1,000,000
Industrial Intermediates & Infrastructure [Member] | Costs Associated with Exit and Disposal Activities [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											31,000,000
Industrial Intermediates & Infrastructure [Member] | Costs Associated with Exit and Disposal Activities [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											0	0	0
Industrial Intermediates & Infrastructure [Member] | Severance and Related Benefit Costs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											0
Industrial Intermediates & Infrastructure [Member] | Severance and Related Benefit Costs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											0	0	0
Industrial Intermediates & Infrastructure [Member] | Asset Write-downs and Write-offs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											64,000,000
Industrial Intermediates & Infrastructure [Member] | Asset Write-downs and Write-offs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net				$ 5,000,000			$ 8,000,000				1,000,000	8,000,000	50,000,000
Performance Materials & Coatings [Member] | Costs Associated with Exit and Disposal Activities [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											0
Performance Materials & Coatings [Member] | Costs Associated with Exit and Disposal Activities [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net												0	0
Performance Materials & Coatings [Member] | Severance and Related Benefit Costs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											0
Performance Materials & Coatings [Member] | Severance and Related Benefit Costs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net												0	0
Performance Materials & Coatings [Member] | Asset Write-downs and Write-offs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											150,000,000
Performance Materials & Coatings [Member] | Asset Write-downs and Write-offs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net						$ 7,000,000						7,000,000	49,000,000
Packaging & Specialty Plastics and Industrial Intermediates & Infrastructure | Costs Associated with Exit and Disposal Activities [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											108,000,000
Segment Reporting, Reconciling Item, Corporate Nonsegment | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											452,000,000
Segment Reporting, Reconciling Item, Corporate Nonsegment | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net												51,000,000	435,000,000
Segment Reporting, Reconciling Item, Corporate Nonsegment | Costs Associated with Exit and Disposal Activities [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											16,000,000
Segment Reporting, Reconciling Item, Corporate Nonsegment | Costs Associated with Exit and Disposal Activities [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net					9,000,000							9,000,000	0
Segment Reporting, Reconciling Item, Corporate Nonsegment | Severance and Related Benefit Costs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net	$ 28,000,000			$ 207,000,000							389,000,000
Segment Reporting, Reconciling Item, Corporate Nonsegment | Severance and Related Benefit Costs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net					$ 25,000,000	16,000,000						41,000,000	344,000,000
Segment Reporting, Reconciling Item, Corporate Nonsegment | Asset Write-downs and Write-offs | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											47,000,000
Segment Reporting, Reconciling Item, Corporate Nonsegment | Asset Write-downs and Write-offs | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net						$ 1,000,000						1,000,000	91,000,000
Operating Segments | Packaging & Specialty Plastics [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											165,000,000
Operating Segments | Packaging & Specialty Plastics [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net													1,000,000
Operating Segments | Industrial Intermediates & Infrastructure [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											95,000,000
Operating Segments | Industrial Intermediates & Infrastructure [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net												8,000,000	50,000,000
Operating Segments | Performance Materials & Coatings [Member] | 2025 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net											$ 150,000,000
Operating Segments | Performance Materials & Coatings [Member] | 2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net												$ 7,000,000	$ 49,000,000