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Financial Instruments Assets and Liabilities Measured on Recurring Basis (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
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Dec. 31, 2010
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| Other selected financial assets: | ||||||||||||||||||||||||||||||
| Held-to-maturity debt securities, carried at amortized cost | $ 1,155 | [1] | $ 1,178 | [1] | ||||||||||||||||||||||||||
| Private equity securities, carried as equity method or at cost | 1,020 | [2] | 1,134 | [2] | ||||||||||||||||||||||||||
| Short-term loans, carried at cost | 51 | [3] | 467 | [3] | ||||||||||||||||||||||||||
| Long-term loans, carried at cost | 381 | [3] | 299 | [3] | ||||||||||||||||||||||||||
| Total other selected financial assets | 2,607 | [4] | 3,078 | [4] | ||||||||||||||||||||||||||
| Total | 35,026 | 38,622 | ||||||||||||||||||||||||||||
| Other financial liabilities: | ||||||||||||||||||||||||||||||
| Short-term borrowings, carried at historical proceeds, as adjusted | 4,018 | [4],[5] | 5,603 | [4],[5] | ||||||||||||||||||||||||||
| Long-term debt, carried at historical proceeds, as adjusted | 34,931 | [6],[7] | 38,410 | [6],[7] | ||||||||||||||||||||||||||
| Total other financial liabilities | 38,949 | [8] | 44,013 | [8] | ||||||||||||||||||||||||||
| Total | 40,714 | 44,897 | ||||||||||||||||||||||||||||
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Fair Value, Measurements, Recurring [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||||||||||||||||||
| Financial assets measured at fair value on a recurring basis | 32,419 | [9] | 35,544 | [9] | ||||||||||||||||||||||||||
| Selected financial instruments measured at fair value on a recurring basis: | ||||||||||||||||||||||||||||||
| Financial liabilities measured at fair value on a recurring basis | 1,765 | [9] | 884 | [9] | ||||||||||||||||||||||||||
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Fair Value, Measurements, Recurring [Member] | Trading securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||||||||||||||||||
| Financial assets measured at fair value on a recurring basis | 154 | [10] | 173 | [10] | ||||||||||||||||||||||||||
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Fair Value, Measurements, Recurring [Member] | AVAILABLE-FOR-SALE SECURITIES [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||||||||||||||||||
| Financial assets measured at fair value on a recurring basis | 29,179 | [1] | 32,699 | [1] | ||||||||||||||||||||||||||
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Fair Value, Measurements, Recurring [Member] | Available-for-sale money market funds [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||||||||||||||||||
| Financial assets measured at fair value on a recurring basis | 1,370 | [11] | 1,217 | [11] | ||||||||||||||||||||||||||
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Fair Value, Measurements, Recurring [Member] | Available-for-sale equity securities, excluding money market funds [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||||||||||||||||||
| Financial assets measured at fair value on a recurring basis | 317 | [1] | 230 | [1] | ||||||||||||||||||||||||||
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Fair Value, Measurements, Recurring [Member] | Interest rate swaps [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||||||||||||||||||
| Derivative assets measured at fair value on a recurring basis | 1,033 | [12] | 603 | [12] | ||||||||||||||||||||||||||
| Selected financial instruments measured at fair value on a recurring basis: | ||||||||||||||||||||||||||||||
| Financial liabilities measured at fair value on a recurring basis | 14 | [13] | 4 | [13] | ||||||||||||||||||||||||||
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Fair Value, Measurements, Recurring [Member] | Foreign currency forward-exchange contracts [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||||||||||||||||||
| Derivative assets measured at fair value on a recurring basis | 349 | [12] | 494 | [12] | ||||||||||||||||||||||||||
| Selected financial instruments measured at fair value on a recurring basis: | ||||||||||||||||||||||||||||||
| Financial liabilities measured at fair value on a recurring basis | 355 | [13] | 257 | [13] | ||||||||||||||||||||||||||
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Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contract [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||||||||||||||||||
| Derivative assets measured at fair value on a recurring basis | 17 | [12] | 128 | [12] | ||||||||||||||||||||||||||
| Selected financial instruments measured at fair value on a recurring basis: | ||||||||||||||||||||||||||||||
| Financial liabilities measured at fair value on a recurring basis | $ 1,396 | [13] | $ 623 | [13] | ||||||||||||||||||||||||||
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