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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 30, 2018
Dec. 31, 2017
Jan. 01, 2017
Statement of Comprehensive Income [Abstract]      
Foreign currency translation adjustments, tax expense (benefit) $ (0.4) $ 0.2 $ 0.0
Tax expense (benefit) on unrealized gains (losses) 0.0 30.2 (0.7)
Pension liability adjustments, tax expense (benefit) $ 0.2 $ (0.1) $ 0.0