SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (CONSOLIDATED) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowances for losses and discounts on receivables
Reserves deducted from assets in the balance sheets:
Balance at beginning of period	$ 32	$ 35	$ 34
Additions
Charged to costs and expenses/charged to income	6	15	13
Other	(2)	(2)	(4)
Deductions	(3)	(16)	(8)
Balance at end of period	33	32	35
Valuation allowance on net deferred tax assets
Reserves deducted from assets in the balance sheets:
Balance at beginning of period	462	495	543
Additions
Charged to costs and expenses/charged to income	59	(31)	(20)
Other	3	(14)	(7)
Foreign currency translation	7	(1)	(9)
Other	(38)	13	(12)
Balance at end of period	$ 493	$ 462	$ 495