Segment Information (Schedule of Reconciliation of PTOI) (Details) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Segment Information
Total segment PTOI	$ 850	[1]	$ 763	[1]	$ 4,918	[1]	$ 4,221	[1]
Net exchange gains (losses), including affiliates	(6)	[1],[2]	(160)	[1],[2]	(145)	[1],[2]	(25)	[1],[2]
Corporate expenses and net interest	(275)	[1]	(273)	[1]	(913)	[1]	(711)	[1]
Income before income taxes	$ 569	[1]	$ 330	[1]	$ 3,860	[1]	$ 3,485	[1]

[1] A reconciliation of total segment PTOI to income before income taxes is as follows: Three Months Ended September 30, Nine Months EndedSeptember 30, 2011 2010 2011 2010Total segment PTOI$850 $763 $4,918 $4,221Net exchange losses, including affiliates(6) (160) (145) (25)Corporate expenses and net interest(275) (273) (913) (711)Income before income taxes$569 $330 $3,860 $3,485

[2] The company routinely uses forward exchange contracts to offset its net exposures, by currency, related to its foreign currency-denominated monetary assets and liabilities. The objective of this program is to maintain an approximately balanced position in foreign currencies in order to minimize, on an after-tax basis, the effects of exchange rate changes on net monetary asset positions. The net pre-tax exchange gains and losses are partially offset by the associated tax impact.