Defined Benefit Plans (Fair Value of Plan Assets) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||
| Fair value of plan assets at beginning of period | $ 1,057.0 | $ 310.9 |
| Actual return on plan assets: | ||
| Foreign currency translation adjustments | (91.1) | 54.3 |
| Fair value of plan assets at end of period | 1,122.7 | 1,057.0 |
| Level 3 [Member] | ||
| Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||
| Fair value of plan assets at beginning of period | 161.2 | |
| Actual return on plan assets: | ||
| Gains relating to assets still held at year-end | 14.6 | |
| Purchases, sales and settlements of investments, net | (1.2) | |
| Foreign currency translation adjustments | (9.6) | |
| Fair value of plan assets at end of period | $ 165.0 | $ 161.2 |