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Retirement Benefits Retirement Benefits (Level 3 Asset Rollforward) (Details) - Fair Value, Nonrecurring [Member] - Pension Benefits - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2022	Dec. 31, 2021
Defined Benefit Plan, Plan Assets, Level 3 Reconciliation [Line Items]
Balance, beginning of year	$ 30,926	$ 31,877
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	2,431	2,430
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	669	2,556
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	(525)	(825)
Balance, end of year	$ 32,163	$ 30,926

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Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
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-Section 50
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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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