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Financial Instruments (Realized And Unrealized Gains (Losses) On Financial Instruments) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Realized and unrealized gains on financial instruments, net (note 8) | $ (351) | $ 84 | $ 62 |
| X | ||||||||||
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- Definition
Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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