RESTRUCTURING COSTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	$ 3	$ 34	$ 19	$ 97
2020 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	5		18
Restructuring reserve	10		10		$ 9	$ 0
2019 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	0		3	82
Restructuring reserve	22		22		$ 27	$ 44
2018 and Prior Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			(2)	16
Restructuring reserve	7	28	7	28
Cost of sales
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	(1)	14	5	27
Cost of sales | 2020 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			7
Cost of sales | 2019 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			0	20
Cost of sales | 2018 and Prior Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			(1)	7
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	$ 4	$ 20	14	70
Selling, general and administrative | 2020 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			11
Selling, general and administrative | 2019 Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			3	62
Selling, general and administrative | 2018 and Prior Actions
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs			$ (1)	$ 9