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Other Expense Restructuring and Related Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Payments to acquire property, plant, and equipment |  |  | $ 74.7 | $ 101.3 |
Severance charges | $ 0.1 | $ 0.0 | 3.4 | 0.0 |
Other charges | 0.7 | 0.0 | 2.5 | 0.0 |
Restructuring and related charges | 1.2 |  | 6.7 |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Charges | 1.2 | $ 0.0 | 6.7 | $ 0.0 |
Asset-related charges [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Cash payments |  |  | 0.0 |  |
Other charges [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Cash payments |  |  | 0.0 |  |
2018 Restructuring Plan [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance charges | 0.1 |  | 3.4 |  |
Asset impairment charges, patent and equipment | 0.4 |  | 0.8 |  |
Other charges | 0.7 |  | 2.5 |  |
Restructuring and related charges | 1.2 |  | 6.7 |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance, December 31, 2017 |  |  | 0.0 |  | $ 0.0
Charges |  |  | 6.7 |  |
Cash payments |  |  | (0.2) |  |
Non-cash asset-write-downs |  |  | (3.3) |  |
Balance, September 30, 2018 | 3.2 |  | 3.2 |  |
2018 Restructuring Plan [Member] | Severance and benefits [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance, December 31, 2017 |  |  | 0.0 |  | 0.0
Charges |  |  | 3.4 |  |
Cash payments |  |  | (0.2) |  |
Non-cash asset-write-downs |  |  | 0.0 |  |
Balance, September 30, 2018 | 3.2 |  | 3.2 |  |
2018 Restructuring Plan [Member] | Asset-related charges [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance, December 31, 2017 |  |  | 0.0 |  | 0.0
Charges |  |  | 0.8 |  |
Non-cash asset-write-downs |  |  | (0.8) |  |
Balance, September 30, 2018 | 0.0 |  | 0.0 |  |
2018 Restructuring Plan [Member] | Other charges [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance, December 31, 2017 |  |  | 0.0 |  | 0.0
Charges |  |  | 2.5 |  |
Non-cash asset-write-downs |  |  | (2.5) |  |
Balance, September 30, 2018 | 0.0 |  | 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, September 30, 2018 | $ 1.0 |  | $ 1.0 |  |

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