Financial Instruments (Realized And Unrealized Gains (Losses) On Financial Instruments) (Details) (USD $) In Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2011 |
Sep. 30, 2010 |
Sep. 30, 2011 |
Sep. 30, 2010 |
|
| Realized and unrealized gains on financial instruments, net (note 8) | $ (91) | $ (89) | $ (61) | $ (14) |
Other Financial Instruments [Member] |
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| Realized and unrealized gains on financial instruments, net (note 8) | 11 | 43 | 57 | 53 |
Non-Strategic Securities [Member] |
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| Realized and unrealized gains on financial instruments, net (note 8) | (240) | 56 | (90) | 105 |
Exchangeable Senior Debentures [Member] |
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| Realized and unrealized gains on financial instruments, net (note 8) | $ 138 | $ (188) | $ (28) | $ (172) |
| X | ||||||||||
- 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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