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Employee Benefits (Accumulated Benefit Obligations) (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2013
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Dec. 31, 2012
|
|---|---|---|
| Defined Benefit Plan Disclosure [Line Items] | ||
| Projected benefit obligation | $ 1,187.4 | |
| Accumulated benefit obligation | 1,188.8 | 1,345.7 |
| Fair value of plan assets | 808.4 | |
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ABO Exceeds Assets [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Projected benefit obligation | 1,182.1 | |
| Accumulated benefit obligation | 1,182.1 | |
| Fair value of plan assets | 799.9 | |
|
Assets Exceed ABO [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Projected benefit obligation | 5.3 | |
| Accumulated benefit obligation | 6.7 | |
| Fair value of plan assets | $ 8.5 |