Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) (USD $) In Millions | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | |
| Condensed Consolidated Statements of Operations (Unaudited) [Abstract] | ||||
| Interest income | $ 1 | $ 3 | $ 4 | $ 9 |
| Income (loss) from discontinued operations, income tax (provision) benefit | $ (19) | $ 64 | $ (18) | $ 63 |