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Assets And Liabilities Measured At Fair Value On A Recurring Basis (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
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Dec. 31, 2010
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|---|---|---|---|---|---|---|
| Assets | ||||||
| Auction rate securities | $ 118 | |||||
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Fair Value, Measurements, Recurring
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||||||
| Assets | ||||||
| Derivative contracts | 337 | 342 | ||||
| Auction rate securities | 118 | 153 | ||||
| Total | 40,369 | 30,818 | ||||
| Liabilities | ||||||
| Derivative contracts | 6 | 8 | ||||
| Total | 6 | 8 | ||||
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Fair Value, Measurements, Recurring | Time deposits
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| Assets | ||||||
| Cash equivalents | 534 | 973 | ||||
| Marketable securities | 495 | 307 | ||||
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Fair Value, Measurements, Recurring | Money market and other funds
|
||||||
| Assets | ||||||
| Cash equivalents | 4,462 | 7,547 | ||||
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Fair Value, Measurements, Recurring | U.S. government notes
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| Assets | ||||||
| Cash equivalents | 300 | |||||
| Marketable securities | 11,579 | 3,930 | ||||
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Fair Value, Measurements, Recurring | Foreign government bonds
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| Assets | ||||||
| Cash equivalents | 150 | |||||
| Marketable securities | 1,629 | 1,172 | ||||
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Fair Value, Measurements, Recurring | Corporate debt securities
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| Assets | ||||||
| Cash equivalents | 8 | |||||
| Marketable securities | 6,112 | 5,742 | ||||
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Fair Value, Measurements, Recurring | U.S. government agencies
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||||||
| Assets | ||||||
| Cash equivalents | 275 | |||||
| Marketable securities | 6,226 | 1,857 | ||||
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Fair Value, Measurements, Recurring | Municipal securities
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| Assets | ||||||
| Marketable securities | 1,794 | 2,503 | ||||
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Fair Value, Measurements, Recurring | Agency residential mortgage-backed securities
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| Assets | ||||||
| Marketable securities | 6,501 | 5,673 | ||||
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Fair Value, Measurements, Recurring | Marketable equity securities
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| Assets | ||||||
| Marketable securities | 307 | 161 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1)
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| Assets | ||||||
| Derivative contracts | 0 | 0 | ||||
| Auction rate securities | 0 | 0 | ||||
| Total | 15,088 | 10,327 | ||||
| Liabilities | ||||||
| Derivative contracts | 0 | 0 | ||||
| Total | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | Time deposits
|
||||||
| Assets | ||||||
| Cash equivalents | 0 | 0 | ||||
| Marketable securities | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market and other funds
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| Assets | ||||||
| Cash equivalents | 3,202 | 5,936 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government notes
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| Assets | ||||||
| Cash equivalents | 300 | |||||
| Marketable securities | 11,579 | 3,930 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign government bonds
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| Assets | ||||||
| Cash equivalents | 0 | |||||
| Marketable securities | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
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| Assets | ||||||
| Cash equivalents | 0 | |||||
| Marketable securities | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agencies
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| Assets | ||||||
| Cash equivalents | 0 | |||||
| Marketable securities | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities
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| Assets | ||||||
| Marketable securities | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | Agency residential mortgage-backed securities
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| Assets | ||||||
| Marketable securities | 0 | 0 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable equity securities
|
||||||
| Assets | ||||||
| Marketable securities | 307 | 161 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2)
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| Assets | ||||||
| Derivative contracts | 337 | 342 | ||||
| Auction rate securities | 0 | 0 | ||||
| Total | 25,163 | 20,338 | ||||
| Liabilities | ||||||
| Derivative contracts | 6 | 8 | ||||
| Total | 6 | 8 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | Time deposits
|
||||||
| Assets | ||||||
| Cash equivalents | 534 | 973 | ||||
| Marketable securities | 495 | 307 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | Money market and other funds
|
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| Assets | ||||||
| Cash equivalents | 1,260 | [1] | 1,611 | [1] | ||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | U.S. government notes
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| Assets | ||||||
| Cash equivalents | 0 | |||||
| Marketable securities | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | Foreign government bonds
|
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| Assets | ||||||
| Cash equivalents | 150 | |||||
| Marketable securities | 1,629 | 1,172 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | Corporate debt securities
|
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| Assets | ||||||
| Cash equivalents | 8 | |||||
| Marketable securities | 6,112 | 5,742 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | U.S. government agencies
|
||||||
| Assets | ||||||
| Cash equivalents | 275 | |||||
| Marketable securities | 6,226 | 1,857 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | Municipal securities
|
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| Assets | ||||||
| Marketable securities | 1,794 | 2,503 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | Agency residential mortgage-backed securities
|
||||||
| Assets | ||||||
| Marketable securities | 6,501 | 5,673 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Other Observable Inputs (Level 2) | Marketable equity securities
|
||||||
| Assets | ||||||
| Marketable securities | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3)
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| Assets | ||||||
| Derivative contracts | 0 | 0 | ||||
| Auction rate securities | 118 | 153 | ||||
| Total | 118 | 153 | ||||
| Liabilities | ||||||
| Derivative contracts | 0 | 0 | ||||
| Total | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | Time deposits
|
||||||
| Assets | ||||||
| Cash equivalents | 0 | 0 | ||||
| Marketable securities | 0 | 0 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | Money market and other funds
|
||||||
| Assets | ||||||
| Cash equivalents | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | U.S. government notes
|
||||||
| Assets | ||||||
| Cash equivalents | 0 | |||||
| Marketable securities | 0 | 0 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | Foreign government bonds
|
||||||
| Assets | ||||||
| Cash equivalents | 0 | |||||
| Marketable securities | 0 | 0 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | Corporate debt securities
|
||||||
| Assets | ||||||
| Cash equivalents | 0 | |||||
| Marketable securities | 0 | 0 | ||||
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Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | U.S. government agencies
|
||||||
| Assets | ||||||
| Cash equivalents | 0 | |||||
| Marketable securities | 0 | 0 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | Municipal securities
|
||||||
| Assets | ||||||
| Marketable securities | 0 | 0 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | Agency residential mortgage-backed securities
|
||||||
| Assets | ||||||
| Marketable securities | 0 | 0 | ||||
|
Fair Value, Measurements, Recurring | Fair value measurement at reporting date using Significant Unobservable Inputs (Level 3) | Marketable equity securities
|
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| Assets | ||||||
| Marketable securities | $ 0 | $ 0 | ||||
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