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Employee Benefit Plans - Pension and Postretirement Plans (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
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Dec. 31, 2010
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|---|---|---|
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U.S. (Pension Benefits) [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Accumulated benefit obligation | $ 5,363 | $ 4,905 |
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Int'l (Pension Benefits) [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Accumulated benefit obligation | $ 2,939 | $ 2,711 |