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Amounts in AOCI Expected to be Amortized and Recognized as a Component of Net Periodic Benefit Cost (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended |
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Dec. 31, 2011
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U.S. Pension Benefits
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| Defined Benefit Plan Disclosure [Line Items] | |
| Prior service cost / (benefit) | $ 173 |
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U.S. Postretirement Medical Benefits
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| Defined Benefit Plan Disclosure [Line Items] | |
| Prior service cost / (benefit) | 5 |
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International Pension Benefits
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| Defined Benefit Plan Disclosure [Line Items] | |
| Prior service cost / (benefit) | $ 2 |
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- Definition
The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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