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Unaudited Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Foreign currency translation:    
Net translation gain (loss) on foreign operations, tax $ 0.0 $ (0.2)
Gain (loss) on net investment hedges, tax 0.0 0.0
Cash flow hedges (Interest rate derivatives):    
Gain (loss) arising in the period, tax benefit 2.5 2.1
Reclassification tax benefit 0.0 0.0
Post-retirement benefits:    
Reclassification of prior year actuarial movements, tax $ 0.0 $ 0.1