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Other Expense Restructuring and Related Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |
Payments to acquire property, plant, and equipment | $ 28.0 | $ 37.5 |
Severance charges | 2.0 | 0.0 |
Other charges | 1.2 | 0.0 |
Restructuring and related charges | 3.3 |  |
Restructuring Reserve [Roll Forward] |  |  |
Charges | 3.3 | $ 0.0 |
2018 Restructuring Plan [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance charges | 2.0 |  |
Asset impairment charges, patent and equipment | 0.1 |  |
Other charges | 1.2 |  |
Restructuring and related charges | 3.3 |  |
Restructuring Reserve [Roll Forward] |  |  |
Charges | 3.3 |  |
Non-cash asset-write-downs | (1.3) |  |
Balance, March 31, 2018 | 2.0 |  |
2018 Restructuring Plan [Member] | Severance and benefits [Member] |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Charges | 2.0 |  |
Non-cash asset-write-downs | 0.0 |  |
Balance, March 31, 2018 | 2.0 |  |
2018 Restructuring Plan [Member] | Asset-related charges [Member] |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Charges | 0.1 |  |
Non-cash asset-write-downs | (0.1) |  |
Balance, March 31, 2018 | 0.0 |  |
2018 Restructuring Plan [Member] | Other charges [Member] |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Charges | 1.2 |  |
Non-cash asset-write-downs | (1.2) |  |
Balance, March 31, 2018 | 0.0 |  |
2018 Restructuring Plan [Member] | Minimum [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related cost, expected cost |  |  | $ 8.0
Payments to acquire property, plant, and equipment |  |  | 9.0
Effect on future earnings |  |  | 17.0
2018 Restructuring Plan [Member] | Maximum [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related cost, expected cost |  |  | 13.0
Payments to acquire property, plant, and equipment |  |  | 14.0
Effect on future earnings |  |  | $ 22.0
2016 Restructuring Plan [Member] |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance, March 31, 2018 | $ 1.8 |  |

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