Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts Receivable - Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period		$ 225	$ 235	$ 262
Additions charged to cost and expenses		119	58	58
Deductions from reserves	[1]	(57)	(68)	(85)
Balance at end of period		287	225	235
Inventory Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period		237	180	212
Additions charged to cost and expenses		298	391	386
Deductions from reserves	[2]	(320)	(334)	(418)
Balance at end of period		215	237	180
Deferred Tax Assets - Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period		1,529	1,704	1,711
Net benefits to income tax expense		(184)	(71)	(47)
(Deductions) additions charged to other comprehensive (loss) income		(37)	(104)	40
Balance at end of period		$ 1,308	$ 1,529	$ 1,704

[1] Deductions include write-offs, recoveries and currency translation adjustments.

[2] Deductions include disposals and currency translation adjustments.