Financial Instruments (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
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	281	[1]		243	[1]
Derivative assets	1,991			1,432
Potential reduction in net position of total derivative liabilities	141			97
Trading securitiy investments
Financial assets and financial liabilities measured at fair value on a recurring basis:
Fair value assets, Level 2 to Level 1 transfer				74
Recurring
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	7,086	[2],[3]		5,359	[2],[3]
Debt securities - current	8	[2],[4]
Debt securities - noncurrent	9	[1]		9	[1]
Trading security investments	49	[1]		74	[1]
Available-for-sale equity investments	281	[1]		243	[1]
Derivative assets	1,991	[5],[6]		1,432	[7],[8]
Total Assets	9,424	[5]		7,118	[8]
Total Liabilities	181	[5]		196	[8]
Potential reduction in net position of total derivative assets	141			97
Potential reduction in net position of total derivative liabilities	141			97
Recurring | Prepaid expenses and other current assets
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	1,204			751
Recurring | Investments and sundry assets
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	787			681
Recurring | Other accrued expenses and liabilities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative liabilities	164			165
Recurring | Other liabilities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative liabilities	18			31
Recurring | Interest rate contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	743	[6]		633	[7]
Derivative liabilities	0	[9]
Recurring | Foreign exchange contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	1,230	[6]		775	[7]
Derivative liabilities	172	[9]		177	[10]
Recurring | Equity contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	18	[6]		24	[7]
Derivative liabilities	10	[9]		19	[10]
Recurring | Time deposits and certificates of deposit
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	4,503	[3]		3,517	[3]
Recurring | Commercial paper
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	500	[3]		764	[3]
Recurring | Money market funds
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	1,311	[3]		662	[3]
Recurring | U.S. government securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	530	[3]		410	[3]
Recurring | Canadian government securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	237	[3]
Recurring | Other securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	6	[3]		6	[3]
Recurring | Level 1
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	1,311	[2],[3]		662	[2],[3]
Debt securities - noncurrent	1	[1]		1	[1]
Trading security investments	49	[1]		74	[1]
Available-for-sale equity investments	281	[1]		243	[1]
Total Assets	1,642	[5]		980	[8]
Recurring | Level 1 | Money market funds
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	1,311	[3]		662	[3]
Recurring | Level 2
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	5,775	[2],[3]		4,697	[2],[3]
Debt securities - current	8	[2],[4]
Debt securities - noncurrent	8	[1]		8	[1]
Derivative assets	1,991	[5],[6]		1,432	[7],[8]
Total Assets	7,782	[5]		6,138	[8]
Total Liabilities	181	[5]		196	[8]
Recurring | Level 2 | Interest rate contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	743	[6]		633	[7]
Derivative liabilities	0	[9]
Recurring | Level 2 | Foreign exchange contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	1,230	[6]		775	[7]
Derivative liabilities	172	[9]		177	[10]
Recurring | Level 2 | Equity contracts
Financial assets and financial liabilities measured at fair value on a recurring basis:
Derivative assets	18	[6]		24	[7]
Derivative liabilities	10	[9]		19	[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	4,503	[3]		3,517	[3]
Recurring | Level 2 | Commercial paper
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	500	[3]		764	[3]
Recurring | Level 2 | U.S. government securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	530	[3]		410	[3]
Recurring | Level 2 | Canadian government securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	237	[3]
Recurring | Level 2 | Other securities
Financial assets and financial liabilities measured at fair value on a recurring basis:
Cash equivalents	$ 6	[3]		$ 6	[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] 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 $141 million each.

[6] 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, 2015 were $1,204 million and $787 million respectively.

[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, 2014 were $751 million and $681 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 $97 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, 2015 were $164 million and $18 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, 2014 were $165 million and $31 million, respectively.