SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (CONSOLIDATED) (Details)-K - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowances for losses and discounts on receivables
Reserves deducted from assets in the balance sheets:
Balance at beginning of period	$ 34	$ 39	$ 41
Additions
Charged to costs and expenses/charged to income	12	15	11
Other	(5)	(12)	(5)
Deductions	(12)	(8)	(8)
Balance at end of period	29	34	39
Valuation allowance on net deferred tax assets
Reserves deducted from assets in the balance sheets:
Balance at beginning of period	1,036	990	1,171
Additions
Charged to costs and expenses/charged to income	74	37	37
Other	5	55	(187)
Foreign currency translation	(20)	(15)	(7)
Other	(69)	(31)	(24)
Balance at end of period	$ 1,026	$ 1,036	$ 990