| **Consolidated Statements of Stockholders’ Equity - USD ($) $ in Millions** | Total       | Common Stock | Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Accumulated Deficit |
|-----------------------------------------------------------------------------------|-------------|--------------|-----------------|-----------------------------------------------|----------------|---------------------|
| Balance at start of period at Dec. 31, 2012                                       | $ 639.2     | $ 1.1        | $ 2,018.5       | $ (156.1)                                     | $ (2.5)        | $ (1,221.8)         |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                    |        |         |            |                                          |           |                |
| Net income                                                                        | 77.1        | 0.0          | 0.0             | 0.0                                           | 0.0            | 77.1                |
| Income (loss) on derivative financial instrument, net of tax                      | 0.2         | 0.0          | 0.0             | 0.2                                           | 0.0            | 0.0                 |
| Translation impact                                                                | (61.6)      | 0.0          | 0.0             | (61.6)                                        | 0.0            | 0.0                 |
| Pension and post-retirement adjustment, net of tax                                | 31.9        | 0.0          | 0.0             | 31.9                                          | 0.0            | 0.0                 |
| Stock-based compensation                                                          | 16.4        | 0.0          | 16.4            | 0.0                                           | 0.0            | 0.0                 |
| Common stock issued, net of shares withheld for employee taxes                    | (1.0)       | 0.0          | 0.0             | 0.0                                           | (1.0)          | 0.0                 |
| Other                                                                             | 0.1         | 0.0          | 0.1             | 0.0                                           | 0.0            | 0.0                 |
| Balance at end of period at Dec. 31, 2013                                         | $ 702.3     | $ 1.1        | 2,035.0         | (185.6)                                       | $ (3.5)        | (1,144.7)           |
| Balance at start of period (in shares) at Dec. 31, 2012                           | 113,143,344 | 113,403,824  |            |                                          | 260,480        |                |
| **Increase (Decrease) In Capital Stock [Roll Forward]**                           |        |         |            |                                          |           |                |
| Common stock issued, net of shares withheld for employee taxes                    | 520,512     | 652,592      |            |                                          | 132,080        |                |
| Balance at end of period (in shares) at Dec. 31, 2013                             | 113,663,856 | 114,056,416  |            |                                          | 392,560        |                |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                    |        |         |            |                                          |           |                |
| Net income                                                                        | $ 91.6      | $ 0.0        | 0.0             | 0.0                                           | $ 0.0          | 91.6                |
| Income (loss) on derivative financial instrument, net of tax                      | 2.4         | 0.0          | 0.0             | 2.4                                           | 0.0            | 0.0                 |
| Translation impact                                                                | (76.4)      | 0.0          | 0.0             | (76.4)                                        | 0.0            | 0.0                 |
| Pension and post-retirement adjustment, net of tax                                | (33.0)      | 0.0          | 0.0             | (33.0)                                        | 0.0            | 0.0                 |
| Common stock repurchases                                                          | (19.4)      | 0.0          | (19.4)          | 0.0                                           | 0.0            | 0.0                 |
| Stock-based compensation                                                          | 15.7        | 0.0          | 15.7            | 0.0                                           | 0.0            | 0.0                 |
| Common stock issued, net of shares withheld for employee taxes                    | (2.2)       | 0.0          | 0.3             | 0.0                                           | (2.5)          | 0.0                 |
| Other                                                                             | 0.0         | 0.0          | (0.1)           | 0.0                                           | 0.1            | 0.0                 |
| Balance at end of period at Dec. 31, 2014                                         | $ 681.0     | $ 1.1        | 2,031.5         | (292.6)                                       | $ (5.9)        | (1,053.1)           |
| **Increase (Decrease) In Capital Stock [Roll Forward]**                           |        |         |            |                                          |           |                |
| Common stock issued, net of shares withheld for employee taxes                    | 1,003,076   | 1,369,740    |            |                                          | 366,664        |                |
| Common stock repurchases                                                          | (2,755,642) | (2,755,642)  |            |                                          | 0              |                |
| Balance at end of period (in shares) at Dec. 31, 2014                             | 111,911,290 | 112,670,514  |            |                                          | 759,224        |                |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                    |        |         |            |                                          |           |                |
| Net income                                                                        | $ 85.9      | $ 0.0        | 0.0             | 0.0                                           | $ 0.0          | 85.9                |
| Income (loss) on derivative financial instrument, net of tax                      | (1.9)       | 0.0          | 0.0             | (1.9)                                         | 0.0            | 0.0                 |
| Translation impact                                                                | (136.7)     | 0.0          | 0.0             | (136.7)                                       | 0.0            | 0.0                 |
| Pension and post-retirement adjustment, net of tax                                | 2.0         | 0.0          | 0.0             | 2.0                                           | 0.0            | 0.0                 |
| Common stock repurchases                                                          | (60.0)      | (0.1)        | (59.9)          | 0.0                                           | 0.0            | 0.0                 |
| Stock-based compensation                                                          | 16.0        | 0.0          | 16.0            | 0.0                                           | 0.0            | 0.0                 |
| Common stock issued, net of shares withheld for employee taxes                    | (5.2)       | 0.0          | 0.7             | 0.0                                           | (5.9)          | 0.0                 |
| Other                                                                             | 0.1         | 0.1          | 0.0             | 0.0                                           | 0.0            | 0.0                 |
| Balance at end of period at Dec. 31, 2015                                         | $ 581.2     | $ 1.1        | $ 1,988.3       | $ (429.2)                                     | $ (11.8)       | $ (967.2)           |
| **Increase (Decrease) In Capital Stock [Roll Forward]**                           |        |         |            |                                          |           |                |
| Common stock issued, net of shares withheld for employee taxes                    | 1,419,341   | 2,149,165    |            |                                          | 729,824        |                |
| Common stock repurchases                                                          | (7,690,628) | (7,690,628)  |            |                                          | 0              |                |
| Balance at end of period (in shares) at Dec. 31, 2015                             | 105,640,003 | 107,129,051  |            |                                          | 1,489,048      |                |

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Increase (Decrease) In Capital Stock [Roll Forward]
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| - Definition
Shares Of Stock Issued During Period Share Based Compensation Net Of Shares Withheld For Taxes
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Stock Issued During Period Value Share Based Compensation Net Of Shares Withheld For Taxes
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".
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| - Definition
A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.
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| - Definition
Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).
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| - Definition
Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.
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| - Definition
Number of shares issued which are neither cancelled nor held in the treasury.
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| - Definition
Number of shares that have been repurchased and retired during the period.
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| - Definition
Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).
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| - Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.
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| - Definition
This element represents movements included in the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy.
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No definition available.
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