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Fair Value of Financial Investments (Details 4) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Income from financial investments net included in other net within other income expense net |  |  |  |
Total income from financial investments | $ 2 | $ 33 | $ 18 | $ 50
Private Equity Funds [Member] |  |  |  |
Income from financial investments net included in other net within other income expense net |  |  |  |
Realized gains | 2 | 6 | 18 | 9
Impairment charges | (2) |  | (2) |
TriMas Corporation Common Stock [Member] |  |  |  |
Income from financial investments net included in other net within other income expense net |  |  |  |
Realized gains |  | $ 27 |  | $ 41

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