RESTRUCTURING COSTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	$ 11	$ 30	$ 16	$ 63
2020 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	11		13
Restructuring reserve	9		9		$ 2	$ 0
2019 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	0		3	49
Restructuring reserve	27		27		$ 32	$ 44
2018 and Prior Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			0	14
Restructuring reserve	11	37	11	37
Cost of sales
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	5	8	6	13
Cost of sales | 2020 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			5
Cost of sales | 2019 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			1	8
Cost of sales | 2018 and Prior Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			0	5
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	$ 6	$ 22	10	50
Selling, general and administrative | 2020 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			8
Selling, general and administrative | 2019 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			2	41
Selling, general and administrative | 2018 and Prior Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			$ 0	$ 9