SIGNIFICANT ACCOUNTING POLICIES - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Significant Accounting Policies [Line Items]
Net sales	$ (1,040)			$ (883)			$ (3,128)	$ (2,263)
Net income	(84)	$ (96)	$ (112)	(48)	$ 92	$ 134	(292)	178
Retained earnings	1,419						1,419		$ 1,198
Inventories, net	548		$ 1				548		476
Inventory adjustments	4						4
Adjustment
Significant Accounting Policies [Line Items]
Net sales	29			12			35	(3)
Net income	19			$ 6			27	$ (4)
Retained earnings	(62)						(62)		(35)	$ 45
Inventories, net	16						$ 16		$ 10
Adjustment | Product Exchanges Incorrectly Accounted For
Significant Accounting Policies [Line Items]
Net sales	$ 4