Stockholder's Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Beginning Balance |
$ 461.9
|
$ 781.1
|
$ 935.1
|
| Other comprehensive income (loss) |
(40.8)
|
(76.2)
|
(183.8)
|
| Ending Balance |
395.0
|
461.9
|
781.1
|
| Currency Translation |
|
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Beginning Balance |
(252.0)
|
(159.8)
|
(56.8)
|
| Other comprehensive income (loss) |
(17.6)
|
(92.2)
|
(103.0)
|
| Ending Balance |
(269.6)
|
(252.0)
|
(159.8)
|
| Marketable Securities |
|
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Beginning Balance |
(0.6)
|
(2.9)
|
10.8
|
| Other comprehensive income (loss) |
2.4
|
(6.5)
|
(13.7)
|
| Less reclassification adjustment |
|
8.8
|
|
| Ending Balance |
1.8
|
(0.6)
|
(2.9)
|
| Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans |
|
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Beginning Balance |
(159.2)
|
(175.4)
|
(109.4)
|
| Other comprehensive income (loss) |
8.5
|
10.0
|
7.2
|
| Net actuarial gain (loss) arising during year |
(34.1)
|
6.2
|
(73.2)
|
| Ending Balance |
(184.8)
|
(159.2)
|
(175.4)
|
| Accumulated Defined Benefit Plans Adjustment | OPEB Plans |
|
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Beginning Balance |
2.1
|
2.3
|
3.4
|
| Other comprehensive income (loss) |
(0.4)
|
(0.4)
|
(0.5)
|
| Net actuarial gain (loss) arising during year |
0.1
|
0.2
|
(0.6)
|
| Ending Balance |
1.8
|
2.1
|
2.3
|
| Interest Rate Swap |
|
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Beginning Balance |
(2.3)
|
|
|
| Other comprehensive income (loss) |
(2.0)
|
(2.9)
|
|
| Less reclassification adjustment |
2.3
|
0.6
|
|
| Ending Balance |
(2.0)
|
(2.3)
|
|
| Total Accumulated Other Comprehensive Loss |
|
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] |
|
|
|
| Beginning Balance |
(412.0)
|
(335.8)
|
(152.0)
|
| Ending Balance |
$ (452.8)
|
$ (412.0)
|
$ (335.8)
|