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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 25, 2020 | Dec. 27, 2019
Other Details |  |  |
Write-downs of long-lived assets | $ 0 |  |
Other Asset Impairment Charges |  | $ 35,000,000 |
Amortization of intangible assets | 17,900,000 | 16,700,000 | $ 15,500,000
Cash surrender value of life insurance change | 3,300,000 | 2,200,000 | $ 3,400,000
Self insured reserves | 9,300,000 | 8,000,000 |
Derivative, Notional Amount | $ 54,000,000 |  |
Minimum |  |  |
Other Details |  |  |
Capitalized software estimated useful life | 2 years |  |
Minimum | Buildings and improvements |  |  |
Other Details |  |  |
Property, plant and equipment, useful life | 10 years |  |
Minimum | Leasehold improvements |  |  |
Other Details |  |  |
Property, plant and equipment, useful life | 5 years |  |
Minimum | Manufacturing equipment |  |  |
Other Details |  |  |
Property, plant and equipment, useful life | 5 years |  |
Minimum | Office, warehouse and automotive equipment |  |  |
Other Details |  |  |
Property, plant and equipment, useful life | 3 years |  |
Maximum |  |  |
Other Details |  |  |
Capitalized software estimated useful life | 5 years |  |
Maximum | Buildings and improvements |  |  |
Other Details |  |  |
Property, plant and equipment, useful life | 30 years |  |
Maximum | Leasehold improvements |  |  |
Other Details |  |  |
Property, plant and equipment, useful life | 10 years |  |
Maximum | Manufacturing equipment |  |  |
Other Details |  |  |
Property, plant and equipment, useful life | 10 years |  |
Maximum | Office, warehouse and automotive equipment |  |  |
Other Details |  |  |
Property, plant and equipment, useful life | 10 years |  |
Trade Accounts Receivable |  |  |
Other Details |  |  |
Accounts receivable | $ 315,000,000 | 302,000,000 |
Other Receivables |  |  |
Other Details |  |  |
Accounts receivable | $ 10,000,000 | $ 13,000,000 |

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- Definition The estimated useful life of computer software, including but not limited to, acquired and internally developed computer software, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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