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Fair Value Measurements (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Jan. 01, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt outstanding $ 1,293.2 $ 1,291.4
Fair Value, Recurring | Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt outstanding $ 1,400.0 $ 1,800.0