| **Pension and Other Retiree Benefits (Estimated Future Benefit Payments) (Details) (USD $)In Millions, unless otherwise specified** | Dec. 31, 2012 |
|-------------------------------------------------------------------------------------------------------------------------------------|---------------|
| Pension Benefits                                                                                                                    |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                    |          |
| 2013                                                                                                                                | $ 21.5        |
| 2014                                                                                                                                | 22.3          |
| 2015                                                                                                                                | 22.7          |
| 2016                                                                                                                                | 23.3          |
| 2017                                                                                                                                | 24.0          |
| Years 2018-2022                                                                                                                     | 125.8         |
| Post-retirement Benefits                                                                                                            |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                    |          |
| 2013                                                                                                                                | 1.1           |
| 2014                                                                                                                                | 1.2           |
| 2015                                                                                                                                | 1.1           |
| 2016                                                                                                                                | 1.1           |
| 2017                                                                                                                                | 1.1           |
| Years 2018-2022                                                                                                                     | $ 4.9         |

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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of benefits expected to be paid  in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.
+ References
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| - Definition
Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.
+ References
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| - Definition
Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.
+ References
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| - Definition
Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.
+ References
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| - Definition
Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.
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