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Financial Instruments and Risk Management (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 27, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Sep. 27, 2019
Derivative [Line Items] |  |  |  |  |  |  |
Realized gain on interest rate swaps |  | $ (0.2) | $ 0.0 | $ (0.1) | $ 0.0 |  |
Pretax losses deferred on contracts |  | 0.6 | 0.0 | 4.2 | 0.0 |  |
Deferred income taxes |  | 0.1 | $ 0.0 | 1.0 | $ 0.0 |  |
Interest Rate Swap |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative amount |  | 135.0 |  | 135.0 |  |  | $ 150.0
Notional amount, quarterly reduction | $ 7.5 |  |  |  |  |  |
Prepaid expenses and other current assets |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Cash deposits related to commodity derivative contracts |  | $ 1.5 |  | $ 1.5 |  | $ 1.0 |

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