Supplementary Information Schedule of Cash Paid for Interest and Taxes (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Feb. 13, 2013 VEB / $	Feb. 12, 2013 VEB / $
Interest paid, net of capitalized interest		$ 477	$ 511	$ 525
Income taxes paid, net of refunds		331	386	442
Currency Devaluation and Related Charges		85	245	$ 100
Asset, Reporting Currency Denominated, Value		(43)
Venezuelan Bolivar
Currency Devaluation and Related Charges	$ 245	$ 26
Asset, Reporting Currency Denominated, Value	$ 92		$ 92
Foreign Currency Exchange Rate, Translation | VEB / $					6.3	4.3