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Summary of Significant Accounting Policies - Narrative (Details) shares in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) estimate shares | Dec. 31, 2014 USD ($) shares | Dec. 31, 2013 USD ($) shares
Inventories |  |  |  |  |
Percentage of the company's inventories valued using the first-in, first-out (FIFO) method | 79.00% | 84.00% | 79.00% | 84.00% |
Increase in inventories if the FIFO inventory valuation method had been used exclusively | $ 40.0 | $ 36.2 | $ 40.0 | $ 36.2 |
Property, Plant and Equipment [Abstract] |  |  |  |  |
Property, plant and equipment, net of accumulated depreciation | 527.0 | 591.0 | $ 527.0 | 591.0 |
Product Liability [Abstract] |  |  |  |  |
Number of estimates upon which the product liability reserves are based | estimate |  |  | 2 |  |
Stock-based compensation expense | 12.2 | 12.6 | $ 14.9 |  |
Research and Development [Abstract] |  |  |  |  |
Research and development costs |  |  | 83.6 | 87.4 | $ 86.4
Restricted Stock |  |  |  |  |
Product Liability [Abstract] |  |  |  |  |
Stock-based compensation expense |  |  | $ 0.3 | $ 1.0 | $ 2.8
Research and Development [Abstract] |  |  |  |  |
Granted (in shares) | shares |  |  | 0.4 | 0.0 | 0.1
Stock Options |  |  |  |  |
Product Liability [Abstract] |  |  |  |  |
Stock-based compensation expense |  |  | $ 4.4 | $ 5.7 | $ 6.3
Performance shares |  |  |  |  |
Product Liability [Abstract] |  |  |  |  |
Stock-based compensation expense |  |  | $ 7.5 | 5.9 | $ 5.8
Research and Development [Abstract] |  |  |  |  |
Granted (in shares) | shares |  |  | 0.6 |  |
Assets Leased to Others |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |
Property, plant and equipment, net of accumulated depreciation | $ 69.4 | $ 83.4 | $ 69.4 | $ 83.4 |
Separation Expense | Restricted Stock |  |  |  |  |
Product Liability [Abstract] |  |  |  |  |
Stock-based compensation expense |  |  | $ 2.2 |  |
Research and Development [Abstract] |  |  |  |  |
Granted (in shares) | shares |  |  | 0.1 |  |

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