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Financial Instruments (Realized And Unrealized Gains (Losses) On Financial Instruments) (Details) (USD $)
In Millions, unless otherwise specified |
9 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2010
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Realized and unrealized gains on financial instruments, net | $ 260 | $ 68 | $ 260 | $ (34) | |||||
| Net impact from Non-strategic Securities | 415 | [1] | 150 | [1] | 775 | [1] | |||
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Non-Strategic Securities [Member]
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| Realized and unrealized gains on financial instruments, net | 669 | [1] | 254 | [1] | 1,076 | [1] | |||
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Borrowed Shares [Member]
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| Realized and unrealized gains on financial instruments, net | (254) | [1] | (104) | [1] | (301) | [1] | |||
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Equity Collars [Member]
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| Realized and unrealized gains on financial instruments, net | (2) | 0 | (101) | ||||||
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Exchangeable Senior Debentures [Member]
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| Realized and unrealized gains on financial instruments, net | (111) | (85) | (670) | ||||||
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Other Financial Instruments [Member]
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| Realized and unrealized gains on financial instruments, net | $ (42) | $ 3 | $ (38) | ||||||
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