Stockholder's Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Currency translation, Balance at beginning of year |
$ (159.8)
|
$ (56.8)
|
$ (63.5)
|
| Currency translation, Other comprehensive income (loss) |
(92.2)
|
(103.0)
|
6.7
|
| Currency translation, Balance at end of year |
(252.0)
|
(159.8)
|
(56.8)
|
| Marketable securities, Balance at beginning of year |
(2.9)
|
10.8
|
4.2
|
| Other comprehensive income (loss): |
|
|
|
| Unrealized gains (losses) arising during the year |
(6.5)
|
(13.7)
|
5.3
|
| Less reclassification adjustment for amounts included in realized loss |
8.8
|
|
1.3
|
| Marketable securities, Balance at end of year |
(0.6)
|
(2.9)
|
10.8
|
| Other comprehensive loss: |
|
|
|
| Unrealized losses arising during the year |
(2.9)
|
|
|
| Less reclassification adjustment for amounts included in interest expense |
0.6
|
|
|
| Balance at end of year |
(2.3)
|
|
|
| Balance at beginning of year |
(335.8)
|
(152.0)
|
(197.1)
|
| Other comprehensive income (loss) |
(76.2)
|
(183.8)
|
45.1
|
| Balance at end of year |
(412.0)
|
(335.8)
|
(152.0)
|
| Defined Benefit Pension Plans |
|
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Balance at beginning of year |
(175.4)
|
(109.4)
|
(137.3)
|
| Other comprehensive income (loss): |
|
|
|
| Amortization of prior service cost (credit) and net losses included in net periodic pension cost |
10.0
|
7.2
|
10.0
|
| Net actuarial gain (loss) arising during year |
6.2
|
(73.2)
|
12.6
|
| Plan curtailment |
|
|
5.3
|
| Balance at end of year |
(159.2)
|
(175.4)
|
(109.4)
|
| OPEB |
|
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Balance at beginning of year |
2.3
|
3.4
|
(0.5)
|
| Other comprehensive income (loss): |
|
|
|
| Amortization of prior service cost (credit) and net losses included in net periodic pension cost |
(0.4)
|
(0.5)
|
(0.6)
|
| Net actuarial gain (loss) arising during year |
0.2
|
(0.6)
|
1.2
|
| Plan amendments |
|
|
3.3
|
| Balance at end of year |
$ 2.1
|
$ 2.3
|
$ 3.4
|