Restructuring and Other Related Charges Accrual Balance and Utilization by Type of Restructuring Cost (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Restructuring Reserve [Roll Forward] | |||
| Beginning Balance | $ 10.7 | $ 11.5 | |
| Restructuring charges | 19.0 | 22.1 | $ 24.3 |
| Paid/Settled | (18.9) | (22.9) | |
| Ending Balance | 10.8 | 10.7 | 11.5 |
| Employee severance and related | |||
| Restructuring Reserve [Roll Forward] | |||
| Beginning Balance | 9.6 | 10.6 | |
| Restructuring charges | 14.2 | 14.7 | 11.8 |
| Paid/Settled | (13.8) | (15.7) | |
| Ending Balance | 10.0 | 9.6 | 10.6 |
| Facility Closing [Member] | |||
| Restructuring Reserve [Roll Forward] | |||
| Beginning Balance | 1.1 | 0.9 | |
| Restructuring charges | 4.8 | 7.4 | |
| Paid/Settled | (5.1) | (7.2) | |
| Ending Balance | $ 0.8 | $ 1.1 | $ 0.9 |