Valuation and Qualifying Accounts - (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Provision for doubtful accounts		$ 193		$ 102	$ 75
Other Changes (2) (3)		(39)		(30)
Reserve for doubtful accounts receivable
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance		224		238	308
Provision for doubtful accounts		193		102	75
Write-offs (1)	[1]	(23)		(71)	(115)
Other Changes (2) (3)	[3]	(11)	[2]	(45)	(30)
Ending balance		383		224	238
Reserve for inventories
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance		319		382	346
Charged to Cost and Expenses		195		37	85
Write-offs (1)	[1]	(235)		(92)	(46)
Other Changes (2) (3)	[3]	(1)		(8)	(3)
Ending balance		$ 278		$ 319	$ 382

[1] Represents the elimination of accounts receivable and inventory deemed uncollectible or worthless.

[2] For the year ended December 31, 2014 and 2013, the reserve for doubtful accounts receivable includes a $39 million and $30 million reduction, respectively, due to the currency devaluation in Venezuela.

[3] Represents transfers, currency translation adjustments and divestitures.