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Fair Value Measurements Fair Value Disclosures (Details) - USD ($)
$ in Millions
Jun. 27, 2020
Dec. 28, 2019
Jun. 29, 2019
Fair Value Disclosures [Abstract]      
Debt, Carrying Value $ 1,024.4 $ 798.4 $ 811.0
Debt, Fair Value $ 1,062.4 $ 817.6 $ 828.9