Other Income, Net (Schedule of Foreign Exchange Gain (Loss)) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign Currency Exchange Gain (Loss) [Line Items]
Net exchange gains (losses)	[1]	$ 30	$ 196	$ (101)
Net exchange gains (losses), tax		(218)	(419)	35
Net exchange gains (losses), after-tax		(188)	(223)	(66)
Subsidiaries [Member]
Foreign Currency Exchange Gain (Loss) [Line Items]
Net exchange gains (losses)	[2]	(404)	(410)	(136)
Net exchange gains (losses), tax		(61)	(207)	47
Net exchange gains (losses), after-tax		(465)	(617)	(89)
Hedging Program [Member]
Foreign Currency Exchange Gain (Loss) [Line Items]
Net exchange gains (losses)		434	607	35
Net exchange gains (losses), tax		(157)	(212)	(12)
Net exchange gains (losses), after-tax		$ 277	$ 395	$ 23

[1] The $30 net exchange gain for the year ended December 31, 2015, includes $(58) and $(40) exchange loss associated with the devaluation of the Ukrainian hryvnia and the Argentina peso, respectively. The $196 net exchange gain for the year ended December 31, 2014, includes a $(58), $(46), and $(14) exchange losses, associated with the devaluation of the Venezuelan bolivar, Ukranian hryvnia, and Argentinian peso, respectively. The $(101) net exchange loss for the year ended December 31, 2013, includes a $(33) exchange loss, associated with the devaluation of the Venezuelan bolivar.

[2] Excludes equity affiliates.