Reorganization and Restructuring (Details)
$ in Millions |
3 Months Ended |
12 Months Ended |
|
Mar. 31, 2018
USD ($)
position
|
Mar. 31, 2017
USD ($)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
| Reorganization and Restructuring 2016 |
|
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
|
| Expected cost savings |
$ 20.0
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
| Restructuring Reserve, beginning balance |
2.0
|
$ 7.6
|
$ 7.6
|
|
| Expense (benefit) |
2.7
|
2.8
|
17.3
|
$ 18.1
|
| Payments and utilization |
(3.2)
|
(5.3)
|
|
|
| Foreign currency exchange effects |
0.1
|
|
|
|
| Restructuring Reserve, ending balance |
1.6
|
5.1
|
2.0
|
7.6
|
| Other Restructuring |
|
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
|
| Expected cost savings |
4.0
|
|
|
|
| Asset Related Adjustments | Reorganization and Restructuring 2016 |
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
| Restructuring Reserve, beginning balance |
0.0
|
0.0
|
0.0
|
|
| Expense (benefit) |
1.2
|
1.0
|
|
|
| Payments and utilization |
(1.2)
|
(1.0)
|
|
|
| Foreign currency exchange effects |
0.0
|
|
|
|
| Restructuring Reserve, ending balance |
0.0
|
0.0
|
0.0
|
0.0
|
| Severance Costs | Reorganization and Restructuring 2016 |
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
| Restructuring Reserve, beginning balance |
1.6
|
7.0
|
7.0
|
|
| Expense (benefit) |
1.5
|
1.8
|
|
|
| Payments and utilization |
(1.9)
|
(4.5)
|
|
|
| Foreign currency exchange effects |
0.1
|
|
|
|
| Restructuring Reserve, ending balance |
1.3
|
4.3
|
1.6
|
7.0
|
| Severance Costs | Other Restructuring |
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
| Expense (benefit) |
1.0
|
|
|
|
| Lease Terminations | Reorganization and Restructuring 2016 |
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
| Restructuring Reserve, beginning balance |
0.4
|
0.6
|
0.6
|
|
| Expense (benefit) |
0.0
|
0.0
|
|
|
| Payments and utilization |
(0.1)
|
0.2
|
|
|
| Foreign currency exchange effects |
0.0
|
|
|
|
| Restructuring Reserve, ending balance |
$ 0.3
|
$ 0.8
|
$ 0.4
|
$ 0.6
|
| Minimum | Reorganization and Restructuring 2016 |
|
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
|
| Positions eliminated across the global workforce | position |
800
|
|
|
|
| Expected costs |
$ 7.0
|
|
|
|
| Minimum | Other Restructuring |
|
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
|
| Positions eliminated across the global workforce | position |
200
|
|
|
|
| Expected costs |
$ 1.0
|
|
|
|
| Maximum | Reorganization and Restructuring 2016 |
|
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
|
| Positions eliminated across the global workforce | position |
900
|
|
|
|
| Expected costs |
$ 9.0
|
|
|
|
| Maximum | Other Restructuring |
|
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
|
| Positions eliminated across the global workforce | position |
300
|
|
|
|
| Expected costs |
$ 3.0
|
|
|
|