Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Financial Instruments:
Impairments of non-financial assets	$ 0		$ 0
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities - noncurrent	9			10
Available-for-sale equity investments	32			34
Derivative assets	404			587
Derivative liabilities	239			242
Potential reduction in net position of total derivative assets	343			262
Potential reduction in net position of total derivative liabilities	343			262
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	7,938	[1],[2]		7,746	[1],[2]
Debt securities - current	160	[1],[3]		717	[1],[4]
Debt securities - noncurrent	9	[5]		10	[5]
Available-for-sale equity investments	32	[5]		34	[5]
Derivative assets	793	[6],[7]		918	[8],[9]
Total Assets	8,932	[7]		9,424	[9]
Total Liabilities	581	[10],[7]		503	[11],[9]
Potential reduction in net position of total derivative assets				262
Potential reduction in net position of total derivative liabilities				262
Recurring | Prepaid expenses and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	396			333
Recurring | Investments and sundry assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	397			585
Recurring | Other accrued expenses and liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	432			426
Recurring | Other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	150			78
Recurring | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	412	[6]		604	[8]
Recurring | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	371	[6]		305	[8]
Derivative liabilities	575	[10]		496	[11]
Recurring | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	9	[6]		9	[8]
Derivative liabilities	7	[10]		7	[11],[9]
Recurring | Time deposits and certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	4,422	[2]		3,694	[2]
Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	992	[2]		2,098	[2]
Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	1,713	[2]		1,923	[2]
Recurring | U.S. government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	800	[2]
Recurring | Other securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	10	[2]		30	[2]
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	1,713	[2]		1,923	[1],[2]
Debt securities - noncurrent	1	[5]		2	[5]
Available-for-sale equity investments	32	[5]		34	[5]
Total Assets	1,747			1,959	[9]
Recurring | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	1,713	[2]		1,923	[2]
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	6,225	[2]		5,823	[1],[2]
Debt securities - current	160	[3]		717	[1],[4]
Debt securities - noncurrent	8	[5]		8	[5]
Derivative assets	793	[6]		918	[8],[9]
Total Assets	7,185			7,466	[9]
Total Liabilities	581	[10]		503	[11],[9]
Recurring | Level 2 | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	412	[6]		604	[8]
Recurring | Level 2 | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	371	[6]		305	[8]
Derivative liabilities	575	[10]		496	[11]
Recurring | Level 2 | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	9	[6]		9	[8]
Derivative liabilities	7	[10]		7	[11],[9]
Recurring | Level 2 | Time deposits and certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	4,422	[2]		3,694	[2]
Recurring | Level 2 | Time deposits and certificates of deposit | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale equity investments
Recurring | Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	992	[2]		2,098	[2]
Recurring | Level 2 | U.S. government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	800	[2]
Recurring | Level 2 | Other securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 10	[2]		$ 30	[2]

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

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

[3] Commercial paper and certificates of deposit reported as marketable securities 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] Included within investments and sundry assets in the Consolidated Statement of Financial Position.

[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 September 30, 2013 were $396 million and $397 million, respectively.

[7] 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 $343 million each

[8] The gross balances of derivative assets contained within prepaid expenses and other current assets, and investments and sundryassets in the Consolidated Statement of Financial Position at December 31, 2012 were $333 million and $585 million, respectively.

[9] If derivative exposures covered by a qualifying master netting agreement had been netted in the Consolidated Statement ofFinancial Position, the total derivative asset and liability positions would have been reduced by $262 millioneach.

[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 September 30, 2013 were $432 million and $150 million, respectively.

[11] The gross balances of derivative liabilities contained within other accrued expenses and liabilities, and other liabilities in theConsolidated Statement of Financial Position at December 31, 2012 were $426 million and $78 million, respectively.