|
Condensed Balance Sheets Parenthetical (USD $)
In Millions, except Per Share data, unless otherwise specified |
Sep. 30, 2014
|
Dec. 31, 2013
|
Sep. 30, 2013
|
|---|---|---|---|
| ASSETS | |||
| Accumulated depreciation | $ 1,324.6 | $ 1,259.1 | $ 1,236.8 |
| Shareholders' equity: | |||
| Common stock, par value | $ 1.00 | $ 1.00 | $ 1.00 |
| Common stock, authorized | 120.0 | 120.0 | 120.0 |
| Common stock, issued | 78.2 | 79.4 | 79.6 |
| Common stock, outstanding | 78.2 | 79.4 | 79.6 |