Employee Benefit Plans - Components of Net Periodic Benefit Cost (Credit) (Detail) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Foreign Pension Plans, Defined Benefit |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Service cost |
$ 9.9
|
$ 11.2
|
$ 9.9
|
| Interest cost |
14.7
|
14.6
|
21.7
|
| Expected return on plan assets |
(14.4)
|
(16.6)
|
(20.0)
|
| Settlement gain |
|
|
(0.3)
|
| Recognized actuarial losses |
11.3
|
13.6
|
10.0
|
| Amortization of prior service cost |
0.2
|
0.4
|
0.5
|
| Amortization of net transition obligations |
|
|
0.1
|
| Total |
21.7
|
23.2
|
21.9
|
| United States Pension Plans of US Entity, Defined Benefit |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Interest cost |
0.8
|
0.8
|
0.8
|
| Expected return on plan assets |
(1.0)
|
(1.1)
|
(1.2)
|
| Recognized actuarial losses |
0.5
|
0.5
|
0.3
|
| Total |
0.3
|
0.2
|
(0.1)
|
| OPEB |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Service cost |
0.1
|
0.1
|
0.1
|
| Interest cost |
0.3
|
0.3
|
0.4
|
| Recognized actuarial losses |
0.2
|
0.3
|
0.2
|
| Amortization of prior service cost |
(0.8)
|
(0.8)
|
(0.9)
|
| Total |
$ (0.2)
|
$ (0.1)
|
$ (0.2)
|