SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (CONSOLIDATED) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Additions
Statutory U.S. Federal tax rate (as a percent)	21.00%	35.00%	35.00%
Change in valuation allowance: U.S. tax law change	$ 2	$ 162
Expired foreign tax credits		327
Allowances for losses and discounts on receivables
Reserves deducted from assets in the balance sheets:
Balance at beginning of period	34	32	$ 29
Additions
Charged to costs and expenses/charged to income	13	12	15
Other	(4)	(2)	(2)
Deductions	(8)	(8)	(10)
Balance at end of period	35	34	32
Valuation allowance on net deferred tax assets
Reserves deducted from assets in the balance sheets:
Balance at beginning of period	543	1,094	1,135
Additions
Charged to costs and expenses/charged to income	(20)	15	3
Other	(7)	(79)	(32)
Foreign currency translation	(9)	4	(3)
Other	(12)	(491)	(9)
Balance at end of period	$ 495	$ 543	$ 1,094