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Financial Instruments and Risk Management (Details 3) (Fair Value Measurements Recurring [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Financial assets (liabilities) measured at fair value on a recurring basis
Total	$ 356	$ 1,223
Debt securities issued by the U.S. Treasury [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	100	350
Debt securities issued by foreign governments [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	81	213
Euro-denominated Senior debt Floating Rate Notes issued by Lehman Brothers [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	5	10
Euro denominated fixed rate debt securities issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	27
Euro denominated Senior debt Floating Rate Notes issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	93	118
U.S.-denominated Senior debt Floating Rate Notes issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	107	200
Auction Rate Securities [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments		72
Micron shares classified as available-for-sale [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments		161
Other equity securities classified as available-for-sale [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	9	11
Equity Securities [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	7	8
Derivative instruments designated as cash flow hedge [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on recurring basis, derivatives	(67)	69
Derivative instruments not designated as a hedge [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on recurring basis, derivatives	(6)	11
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Total	424	1,061
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Debt securities issued by the U.S. Treasury [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	100	350
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Debt securities issued by foreign governments [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	81	213
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Euro-denominated Senior debt Floating Rate Notes issued by Lehman Brothers [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Euro denominated fixed rate debt securities issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	27
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Euro denominated Senior debt Floating Rate Notes issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	93	118
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S.-denominated Senior debt Floating Rate Notes issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	107	200
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Auction Rate Securities [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments		0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Micron shares classified as available-for-sale [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments		161
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other equity securities classified as available-for-sale [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	9	11
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	7	8
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Derivative instruments designated as cash flow hedge [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on recurring basis, derivatives	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Derivative instruments not designated as a hedge [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on recurring basis, derivatives	0	0
Significant Other Observable Inputs (Level 2) [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Total	(68)	80
Significant Other Observable Inputs (Level 2) [Member] | Debt securities issued by the U.S. Treasury [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Debt securities issued by foreign governments [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Euro-denominated Senior debt Floating Rate Notes issued by Lehman Brothers [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	5	0
Significant Other Observable Inputs (Level 2) [Member] | Euro denominated fixed rate debt securities issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0
Significant Other Observable Inputs (Level 2) [Member] | Euro denominated Senior debt Floating Rate Notes issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | U.S.-denominated Senior debt Floating Rate Notes issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Auction Rate Securities [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments		0
Significant Other Observable Inputs (Level 2) [Member] | Micron shares classified as available-for-sale [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments		0
Significant Other Observable Inputs (Level 2) [Member] | Other equity securities classified as available-for-sale [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Derivative instruments designated as cash flow hedge [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on recurring basis, derivatives	(67)	69
Significant Other Observable Inputs (Level 2) [Member] | Derivative instruments not designated as a hedge [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on recurring basis, derivatives	(6)	11
Significant Unobservable Inputs (Level 3) [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Total	0	82
Significant Unobservable Inputs (Level 3) [Member] | Debt securities issued by the U.S. Treasury [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Debt securities issued by foreign governments [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Euro-denominated Senior debt Floating Rate Notes issued by Lehman Brothers [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	10
Significant Unobservable Inputs (Level 3) [Member] | Euro denominated fixed rate debt securities issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0
Significant Unobservable Inputs (Level 3) [Member] | Euro denominated Senior debt Floating Rate Notes issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | U.S.-denominated Senior debt Floating Rate Notes issued by other financial institutions [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Auction Rate Securities [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments		72
Significant Unobservable Inputs (Level 3) [Member] | Micron shares classified as available-for-sale [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments		0
Significant Unobservable Inputs (Level 3) [Member] | Other equity securities classified as available-for-sale [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on a recurring basis, investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Derivative instruments designated as cash flow hedge [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on recurring basis, derivatives	0	0
Significant Unobservable Inputs (Level 3) [Member] | Derivative instruments not designated as a hedge [Member]
Financial assets (liabilities) measured at fair value on a recurring basis
Financial assets (liabilities) measured at fair value on recurring basis, derivatives	$ 0	$ 0

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Financial assets liabilities, fair value disclosure.

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No definition available.

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- Definition

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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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 investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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