VALUATION AND QUALIFYING ACCOUNTS (Tables)

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Summary of Activity for Valuation Allowances

Below is a summary of activity:

Year Ended December 31,	Balance at Beginning of the Year		Adoption of New Expected Credit Losses Accounting Standard		Charged to costs and expenses		Deductions (1)		Balance at End of the Year
2020
Allowances for credit losses	$	(20)	$	(2)	$	(26)	$	14	$	(34)
Deferred tax assets—valuation allowance	$	(9)	$	—	$	(6)	$	—	$	(15)
2019
Allowances for credit losses	$	(20)	$	—	$	(10)	$	10	$	(20)
Deferred tax assets—valuation allowance	$	(5)	$	—	$	(4)	$	—	$	(9)
2018
Allowances for credit losses	$	(14)	$	—	$	(15)	$	9	$	(20)
Deferred tax assets—valuation allowance	$	(6)	$	—	$	—	$	1	$	(5)

(1)Reflects write-off of uncollectible accounts receivable or expiration of foreign net operating tax losses.