Earnings Per Share Earnings Per Share, Textuals (Details) In Millions | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | |
| Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 5.1 | 6.6 | 5.5 | 5.4 |