SUPPLEMENTAL FINANCIAL INFORMATION - Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income, net
Foreign exchange (gains) losses, net	$ 0	$ 23	$ 5	$ 44
Pension and other postretirement benefit plans	4	0	11	(2)
Change in fair value of marketable equity securities	9	(9)	2	(9)
Other, net	(1)	2	(3)	(1)
Other expense, net	$ 12	$ 16	$ 15	$ 32

Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

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