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
	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized losses, net of income taxes of ($4) in 2014 and ($28) in 2013	$ (37)	$ (234)
Amount of Gain/(Loss) Reclassified from Other Comprehensive Earnings/(Losses) into Earnings	(7)	(31)
Foreign Exchange Contract [Member] | Net Investment Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized losses, net of income taxes of ($4) in 2014 and ($28) in 2013	17	91
Foreign Exchange Contract [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Reclassified from Other Comprehensive Earnings/(Losses) into Earnings	(7)	(31)
Translation Adjustment For Cash Flow And Net Investment Hedge Increase Decrease	14	3
Foreign Exchange Contract [Member] | Other Comprehensive Income (Loss) [Member] | Net Investment Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Translation Adjustment For Cash Flow And Net Investment Hedge Increase Decrease	25	3
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