SEGMENTS AND GEOGRAPHIC REGIONS - Summary of Reconciliation of Operating EBITDA (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2020		Jun. 30, 2019		Jun. 30, 2020		Jun. 30, 2019
Segment Reporting Information [Line Items]
Loss from continuing operations, net of tax		$ (2,471)		$ (1,103)		$ (3,081)		$ (1,177)
(Benefit from) provision for income taxes on continuing operations		(36)		155		8		64
Loss from continuing operations before income taxes		(2,507)		(948)		(3,073)		(1,113)
Depreciation and amortization		774		507		1,546
Interest income		2	[1]	9		4	[2]	49
Interest expense		193		165		376		316
Non-operating pension and other post employment benefit (OPEB) credits		8	[1]	18		19	[2]	39
Foreign exchange gains (losses), net		(23)	[1]	(17)		(31)	[2]	(78)
Costs Historically Allocated to the Materials Science Business and Agriculture Business						0
Significant items		(2,674)	[3]	(1,708)	[3]	(3,621)	[4]
Operating Income (Loss) Before Interest, Taxes, Depreciation,Amortization, Foreign Exchange Gains (Losses), And Significant Items	[5]	1,135		$ 1,422		2,456	[6]
Adjusted for Significant Item [Member]
Segment Reporting Information [Line Items]
Interest expense		$ 181	[7]			$ 354	[8]
Pro Forma
Segment Reporting Information [Line Items]
Pro Forma Adjustments	[6]							122
Depreciation and amortization								1,034
Interest income	[2]							49
Non-operating pension and other post employment benefit (OPEB) credits	[2]							39
Foreign exchange gains (losses), net	[2]							(78)
Costs Historically Allocated to the Materials Science Business and Agriculture Business	[9]							256
Significant items	[4]							(2,218)
Pro forma Operating EBITDA	[6]							2,852
Pro Forma | Adjusted for Significant Item [Member]
Segment Reporting Information [Line Items]
Interest expense								$ 345

[1] Included in "Sundry income (expense) - net."

[2] Included in "Sundry income (expense) - net."

[3] The significant items for the three months ended June 30, 2020 and 2019 are presented on an as reported basis.

[4] The significant items for the six months ended June 30, 2020 are presented on an as reported basis. The significant items for the six months ended June 30, 2019 are presented on a pro forma basis.

[5] A reconciliation of "Income (loss) from continuing operations, net of tax" to Operating EBITDA and pro forma Operating EBITDA, as applicable, is provided below

[6] For the six months ended June 30, 2019, operating EBITDA is on a pro forma basis. The pro forma adjustment reflects the net pro forma impact of items directly attributable to the Transactions, as applicable.

[7] The three months ended June 30, 2020 excludes N&B financing fee amortization. Refer to details of significant items below.

[8] The six months ended June 30, 2020 excludes N&B financing fee amortization. Refer to details of significant items below.

[9] Costs previously allocated to the materials science and agriculture businesses that did not meet the definition of expenses related to discontinued operations in accordance with ASC 205.