SIGNIFICANT ACCOUNTING POLICIES - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Significant Accounting Policies [Line Items]
Inventories, net	$ 532	$ 1	$ 466
Inventory adjustments	4
Trade Accounts Receivable
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts and trade discounts	$ 14		$ 18

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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