Fair Value Measurements (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Assets and Liabilities Measured on Recurring Basis
Derivative instruments - assets	$ 114	$ 77
U.S. government agency securities \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	389	309
U.S. government agency securities \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	389	309
Foreign government agency securities \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	3	55
Foreign government agency securities \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	3	55
Corporate debt securities \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	495	472
Corporate debt securities \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	495	472
Commercial paper \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	138	55
Commercial paper \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	138	55
Certificates of deposit/time deposits \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	117	29
Certificates of deposit/time deposits \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	117	29
U.S. treasury securities \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	34	99
U.S. treasury securities \| Fair value on a recurring basis \| Level 1
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	34	99
U.S. municipal securities \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	9	23
U.S. municipal securities \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	9	23
Asset-backed securities Automobile loan related \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	469	397
Asset-backed securities Automobile loan related \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	469	397
Asset-backed securities Credit card related \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	200	149
Asset-backed securities Credit card related \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	200	149
Asset-backed securities Equipment lease related \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	58	38
Asset-backed securities Equipment lease related \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	58	38
Asset-backed securities Other asset-backed securities \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	10	8
Asset-backed securities Other asset-backed securities \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	10	8
Auction rate securities \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	5	7
Auction rate securities \| Fair value on a recurring basis \| Level 3
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	5	7
Other securities \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	2
Other securities \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	2
Foreign currency forward/option contracts \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Derivative instruments - assets	83	38
Derivative instruments - liabilities	42	82
Foreign currency forward/option contracts \| Fair value on a recurring basis \| Level 1
Assets and Liabilities Measured on Recurring Basis
Derivative instruments - assets	76	36
Derivative instruments - liabilities	42	82
Foreign currency forward/option contracts \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Derivative instruments - assets	7	2
Commodity price swap contracts \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Derivative instruments - liabilities	4	5
Commodity price swap contracts \| Fair value on a recurring basis \| Level 1
Assets and Liabilities Measured on Recurring Basis
Derivative instruments - liabilities	4	5
Interest rate swap contracts \| Fair value on a recurring basis \| Fair Value
Assets and Liabilities Measured on Recurring Basis
Derivative instruments - assets	31	39
Interest rate swap contracts \| Fair value on a recurring basis \| Level 2
Assets and Liabilities Measured on Recurring Basis
Derivative instruments - assets	31	39
Fair value on a recurring basis \| Fair Value \| Investments
Assets and Liabilities Measured on Recurring Basis
Investments	5	21
Fair value on a recurring basis \| Level 1 \| Investments
Assets and Liabilities Measured on Recurring Basis
Investments	5	21
Asset-backed securities:
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	$ 737

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.