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Pension And Other Postretirement Benefits (Summary Of Assets In Excess Of/(Less Than) Benefit Obligation) (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
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Dec. 31, 2010
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Pension Benefits - U.S. [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Defined Benefit Plan Funded Status of Plan | $ (6,379) | [1] | $ (4,172) | [1] | ||
| Total | (6,379) | (4,172) | ||||
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Pension Benefits - U.S. [Member] | Funded Plans [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Defined Benefit Plan Funded Status of Plan | (4,141) | (2,349) | ||||
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Pension Benefits - U.S. [Member] | Unfunded Plans [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Unfunded plans | (2,238) | (1,823) | ||||
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Pension Benefits - Non-U.S. [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Defined Benefit Plan Funded Status of Plan | (11,951) | [1] | (8,957) | [1] | ||
| Total | (11,951) | (8,957) | ||||
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Pension Benefits - Non-U.S. [Member] | Funded Plans [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Defined Benefit Plan Funded Status of Plan | (5,319) | (2,769) | ||||
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Pension Benefits - Non-U.S. [Member] | Unfunded Plans [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Unfunded plans | $ (6,632) | $ (6,188) | ||||
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