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Restructuring Plans (Details) $ in Millions |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 22 Months Ended | 44 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 21, 2017 USD ($) | Feb. 05, 2015 | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($)
Corporate Relocation Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring, number of positions affected |  | 350 |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | $ 3.4 |  |  |  |
Restructuring charges incurred to date |  |  | $ 35.2 |  | 35.2 |  |  | $ 35.2 |
DSD Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges incurred to date |  |  | 4.4 |  | 4.4 |  |  | 4.4 |
Employee-related | Corporate Relocation Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Payments |  |  |  |  |  |  |  |  | $ 17.4
Employee-related | DSD Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  | 0.2 | $ 0.0 | 1.2 | $ 0.0 |  |  |
Payments |  |  |  |  |  |  |  | 2.5 |
Facility Closing | Corporate Relocation Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Accelerated depreciation |  |  |  |  |  |  |  |  | 2.3
Payments |  |  |  |  |  |  |  |  | 7.0
Other Restructuring | Corporate Relocation Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Payments |  |  |  |  |  |  |  |  | 7.4
Sale Leaseback Transaction, Rent Expense |  |  |  |  |  |  | $ 1.4 |  |
Other Restructuring | DSD Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  | 0.0 | $ 0.1 | 0.2 | $ 0.2 |  |  |
Payments |  |  |  |  |  |  |  | 1.9 |
Pension withdrawal liability | Corporate Relocation Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Payments |  |  |  |  |  |  |  |  | $ 3.4
Pension withdrawal liability | DSD Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Payments |  |  |  |  | 4.2 |  |  |  |
Expected cost remaining |  |  | 0.3 |  | 0.3 |  |  | 0.3 |
Maximum | DSD Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Expected restructuring and related costs | $ 4.9 |  |  |  |  |  |  |  |
Maximum | Employee-related | DSD Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Expected restructuring and related costs | 2.7 |  |  |  |  |  |  |  |
Maximum | Other Restructuring | DSD Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Expected restructuring and related costs | $ 2.2 |  |  |  |  |  |  |  |
WCTPP [Member] |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Withdrawal obligation |  |  | 2.6 |  | 2.6 |  |  | 2.6 |
WCTPP [Member] | Employee-related | Corporate Relocation Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Multiemployer Plans, Withdrawal Obligation, Amount Paid |  |  | 0.8 |  | 0.8 |  |  | 0.8 |
Withdrawal obligation |  |  | $ 2.6 |  | $ 2.6 |  |  | $ 2.6 |

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