|
Capital Stock - Shares Used To Calculate Earnings (Details)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Jun. 30, 2012
|
Jun. 30, 2011
|
|
| Weighted Average Number of Shares Outstanding Reconciliation [Abstract] | ||||
| Basic | 48.5 | 47.8 | 48.3 | 47.7 |
| Effect of dilutive stock awards | 0.1 | 0.3 | 0.2 | 0.3 |
| Diluted | 48.6 | 48.1 | 48.5 | 48.0 |
| Antidilutive stock options and awards excluded from denominator | 2.6 | 1.5 | 2.6 | 2.2 |
| Deferred compensation common stock unit | 1.1 | 1.1 | 1.2 | 1.1 |