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Intangible Assets and Goodwill - Carrying Values of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 29, 2018
Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Total definite-lived intangible assets $ 705.2 $ 734.8
Accumulated Amortization (129.4) (113.2)
Net 575.8 621.6
Indefinite-lived intangible assets 557.1 614.1
Total intangible assets, excluding goodwill 1,132.9 1,235.7
Goodwill 780.0 847.7
Reacquired rights    
Finite-Lived Intangible Assets [Line Items]    
Total definite-lived intangible assets 400.4 400.4
Trademarks    
Finite-Lived Intangible Assets [Line Items]    
Total definite-lived intangible assets 23.0 23.0
Lease rights    
Finite-Lived Intangible Assets [Line Items]    
Total definite-lived intangible assets 71.6 80.1
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Total definite-lived intangible assets $ 210.2 $ 231.3