Financial Instruments (Pre-Tax Effect of Foreign Exchange Contracts Designated as Net Investment Hedging Instruments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gains (losses), net of income taxes	$ (77)	$ (488)	$ (114)	$ (722)
Amount of Gain/(Loss) Reclassified from Other Comprehensive Earnings/(Losses) into Earnings	(6)	(64)	(13)	(95)
Foreign Exchange Contract [Member] | Net Investment Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gains (losses), net of income taxes	76	(55)	93	36
Foreign Exchange Contract [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Other Comprehensive Earnings/(Losses) on Derivatives	15	12	29	15
Amount of Gain/(Loss) Reclassified from Other Comprehensive Earnings/(Losses) into Earnings	(6)	(64)	(13)	(95)
Foreign Exchange Contract [Member] | Other Comprehensive Income (Loss) [Member] | Net Investment Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Other Comprehensive Earnings/(Losses) on Derivatives	11	13	36	16
Foreign Exchange Contract [Member] | Interest expense, net [Member] | Net Investment Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Reclassified from Other Comprehensive Earnings/(Losses) into Earnings	$ 0	$ 0	$ 0	$ 0