|
Supplemental Cash Flow Information (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
|
Mar. 31, 2012
|
Jun. 30, 2012
|
Jun. 30, 2011
|
|
| Supplemental Cash Flow [Line Items] | |||
| Interest | $ 11.2 | $ 9.8 | |
| Income taxes | 48.8 | 39.6 | |
| Captial lease arrangments | 8.7 | 29.7 | |
| Shares of Common Stock for Defined Benefit Plan Contribution | 361,446 | ||
| Shares of Common Stock for Defined Benefit Plan Contribution - Value per Share | $ 24.90 | ||
| Value of Shares of Common Stock for Defined Benefit Plan Contribution | $ 9.0 | $ 9.0 | |