|
Condensed Balance Sheets Parenthetical (USD $)
In Millions, except Per Share data, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
Sep. 30, 2011
|
|---|---|---|---|
| ASSETS | |||
| Accumulated depreciation | $ 1,206.0 | $ 1,144.0 | $ 1,122.1 |
| Shareholders' equity: | |||
| Common stock, par value | $ 1.00 | $ 1.00 | $ 1.00 |
| Common stock, authorized | 120.0 | 120.0 | 120.0 |
| Common stock, issued | 80.2 | 80.1 | 80.2 |
| Common stock, outstanding | 80.2 | 80.1 | 80.2 |