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Accounting Policies (Details 2) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Nov. 30, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Intangible assets |  |  |  |
Non-cash pre-tax impairment charges of indefinite lived intangible assets |  | $ 0.6 | $ 1.3 | $ 0.7
Long-lived assets written-down |  | 0.6 | 1.3 |
Intangible assets subject to amortization |  |  |  |
Gross Carrying Amount |  | 301.2 | 295.1 |
Accumulated Amortization |  | (144.6) | (123.6) |
Net Carrying Amount |  | 156.6 | 171.5 |
Indefinite-lived intangible assets |  |  |  |
Indefinite-lived intangible assets |  | 36.2 | 38.6 |
Intangible assets |  |  |  |
Gross Carrying Amount |  | 337.4 | 333.7 |
Net Carrying Amount |  | $ 192.8 | 210.1 |
Weighted-average amortization |  | 11 years 10 months 24 days |  |
Aggregate amortization expense for amortized intangible assets |  | $ 20.9 | 15.2 | $ 14.7
Future amortization expense |  |  |  |
Future amortization expense, 2016 |  | 20.1 |  |
Future amortization expense, 2017 |  | 19.5 |  |
Future amortization expense, 2018 |  | 16.2 |  |
Future amortization expense, 2019 |  | 12.5 |  |
Future amortization expense, 2020 |  | 12.2 |  |
Apex |  |  |  |
Intangible assets |  |  |  |
Net Carrying Amount |  | $ 10.1 |  |
Weighted-average amortization |  | 13 years |  |
Patents |  |  |  |
Intangible assets subject to amortization |  |  |  |
Gross Carrying Amount |  | $ 16.1 | 16.2 |
Accumulated Amortization |  | (14.1) | (13.3) |
Net Carrying Amount |  | $ 2.0 | 2.9 |
Intangible assets |  |  |  |
Weighted-average amortization |  | 4 years |  |
Customer relationships |  |  |  |
Intangible assets subject to amortization |  |  |  |
Gross Carrying Amount |  | $ 212.5 | 206.7 |
Accumulated Amortization |  | (102.1) | (87.5) |
Net Carrying Amount |  | $ 110.4 | 119.2 |
Intangible assets |  |  |  |
Weighted-average amortization |  | 11 years 6 months |  |
Customer relationships | Apex |  |  |  |
Intangible assets |  |  |  |
Gross Carrying Amount |  | $ 8.4 |  |
Weighted-average amortization | 10 years | 10 years |  |
Technology |  |  |  |
Intangible assets subject to amortization |  |  |  |
Gross Carrying Amount |  | $ 41.3 | 42.1 |
Accumulated Amortization |  | (16.1) | (12.9) |
Net Carrying Amount |  | $ 25.2 | 29.2 |
Intangible assets |  |  |  |
Weighted-average amortization |  | 9 years 7 months 6 days |  |
Trade name |  |  |  |
Intangible assets subject to amortization |  |  |  |
Gross Carrying Amount |  | $ 21.9 | 20.6 |
Accumulated Amortization |  | (6.4) | (4.2) |
Net Carrying Amount |  | $ 15.5 | 16.4 |
Intangible assets |  |  |  |
Weighted-average amortization |  | 14 years 6 months |  |
Trade name | Apex |  |  |  |
Intangible assets |  |  |  |
Gross Carrying Amount |  | $ 1.7 |  |
Weighted-average amortization | 15 years | 15 years |  |
Trade name | Americas |  |  |  |
Intangible assets |  |  |  |
Long-lived assets written-down |  | $ 0.5 | 0.5 |
Trade name | EMEA |  |  |  |
Intangible assets |  |  |  |
Long-lived assets written-down |  | 0.1 | 0.8 |
Other |  |  |  |
Intangible assets subject to amortization |  |  |  |
Gross Carrying Amount |  | 9.4 | 9.5 |
Accumulated Amortization |  | (5.9) | (5.7) |
Net Carrying Amount |  | $ 3.5 | $ 3.8 |
Intangible assets |  |  |  |
Weighted-average amortization |  | 32 years 6 months |  |

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