Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013
Financial Instruments:
Impairments of non-financial assets	$ 0		$ 0
Financial assets and financial liabilities measured at fair value on a recurring basis:
Debt securities - noncurrent	9	[1]		9	[1]
Available-for-sale equity investments	4	[1]		18	[1]
Derivative assets	434			439
Derivative liabilities	220			250
Potential reduction in net position of total derivative liabilities	221			251
Recurring
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	7,032	[2],[3]		7,997	[2],[3]
Debt securities - current	295	[2],[4]		350	[2],[4]
Debt securities - noncurrent	9	[1]		9	[1]
Trading securities investments	77	[1]
Available-for-sale equity investments	4	[1]		18	[1]
Derivative assets	678	[5],[6]		719	[7],[8]
Total Assets	8,095	[6]		9,092	[8]
Total Liabilities	441	[6]		501	[8]
Potential reduction in net position of total derivative assets	221			251
Potential reduction in net position of total derivative liabilities	221			251
Recurring | Prepaid expenses and other current assets
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	202			318
Recurring | Investments and sundry assets
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	476			401
Recurring | Other accrued expenses and liabilities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative liabilities	370			375
Recurring | Other liabilities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative liabilities	71			126
Recurring | Interest rate contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	363	[5]		308	[7]
Derivative liabilities	12	[9]		13	[10]
Recurring | Foreign exchange contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	297	[5]		375	[7]
Derivative liabilities	427	[9]		484	[10]
Recurring | Equity contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	17	[5]		36	[7]
Derivative liabilities	2	[9]		4	[10]
Recurring | Time deposits and certificates of deposit
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	4,619	[3]		4,754	[3]
Recurring | Commercial paper
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	559	[3]		1,507	[3]
Recurring | Money market funds
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	988	[3]		1,728	[3]
Recurring | U.S. government securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	599	[3]
Recurring | Canadian government securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	226	[3]
Recurring | Other securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	40	[3]		8	[3]
Recurring | Level 1
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	988	[2],[3]		1,728	[2],[3]
Debt securities - noncurrent	1	[1]		1	[1]
Available-for-sale equity investments	4	[1]		18	[1]
Total Assets	993	[6]		1,747	[8]
Recurring | Level 1 | Money market funds
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	988	[3]		1,728	[3]
Recurring | Level 2
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	6,044	[2],[3]		6,269	[2],[3]
Debt securities - current	295	[2],[4]		350	[2],[4]
Debt securities - noncurrent	8	[1]		7	[1]
Trading securities investments	77	[1]
Derivative assets	678	[5],[6]		719	[7],[8]
Total Assets	7,102	[6]		7,345	[8]
Total Liabilities	441	[6]		501	[8]
Recurring | Level 2 | Interest rate contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	363	[5]		308	[7]
Derivative liabilities	12	[9]		13	[10]
Recurring | Level 2 | Foreign exchange contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	297	[5]		375	[7]
Derivative liabilities	427	[9]		484	[10]
Recurring | Level 2 | Equity contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	17	[5]		36	[7]
Derivative liabilities	2	[9]		4	[10]
Recurring | Level 2 | Time deposits and certificates of deposit
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	4,619	[3]		4,754	[3]
Recurring | Level 2 | Commercial paper
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	559	[3]		1,507	[3]
Recurring | Level 2 | U.S. government securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	599	[3]
Recurring | Level 2 | Canadian government securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	226	[3]
Recurring | Level 2 | Other securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	$ 40	[3]		$ 8	[3]

[1] Included within investments and sundry assets in the Consolidated Statement of Financial Position.

[2] Available-for-sale securities with carrying values that approximate fair value.

[3] Included within cash and cash equivalents in the Consolidated Statement of Financial Position.

[4] Commercial paper and certificates of deposit reported as marketable securities in the Consolidated Statement of Financial Position.

[5] The gross balances of derivative assets contained within prepaid expenses and other current assets, and investments and sundry assets in the Consolidated Statement of Financial Position at March 31, 2014 were $202 million and $476 million, respectively.

[6] If derivative exposures covered by a qualifying master netting agreement had been netted in the Consolidated Statement of Financial Position, the total derivative asset and liability positions would have been reduced by $221 million each.

[7] The gross balances of derivative assets contained within prepaid expenses and other current assets, and investments and sundry assets in the Consolidated Statement of Financial Position at December 31, 2013 were $318 million and $401 million, respectively.

[8] If derivative exposures covered by a qualifying master netting agreement had been netted in the Consolidated Statement of Financial Position, the total derivative asset and liability positions would have been reduced by $251 million each.

[9] The gross balances of derivative liabilities contained within other accrued expenses and liabilities, and other liabilities in the Consolidated Statement of Financial Position at March 31, 2014 were $370 million and $71 million, respectively.

[10] The gross balances of derivative liabilities contained within other accrued expenses and liabilities, and other liabilities in the Consolidated Statement of Financial Position at December 31, 2013 were $375 million and $126 million, respectively.