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Litigation and Contingencies Environmental Remediation (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 26, 2020 | Sep. 26, 2020 | Sep. 28, 2019
Environmental Exit Cost [Line Items] |  |  |
Site Contingency, Recovery from Third Party of Environmental Remediation Cost |  | $ 55.0 |
Insurance Recoveries | $ 1.2 | 7.0 |
Accrual for Environmental Loss Contingencies [Roll Forward] |  |  |
Remediation liability at beginning of the year |  | 124.4 | $ 22.6
Changes in estimate |  | 0.0 | 0.0
Amounts paid |  | (27.1) | (7.8)
Remediation liability at the end of the quarter | 97.3 | 97.3 | $ 14.8
Environmental remediation accrual, current | 23.7 | 23.7 |
Environmental remediation accrual, noncurrent | $ 73.6 | $ 73.6 |

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