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Property and Equipment - Depreciation Expense and Repairs (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 26, 2019
Oct. 27, 2018
Oct. 26, 2019
Oct. 27, 2018
Property, Plant and Equipment [Abstract]        
Depreciation expense $ 42.1 $ 39.8 $ 125.0 $ 116.5