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Discontinued Operations and Dispositions - Other Significant Operating Items (Details) - USD ($)
$ in Millions
12 Months Ended
Feb. 02, 2019
Feb. 03, 2018
Jan. 28, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Payments to Acquire Property, Plant, and Equipment $ 93.7 $ 113.4 $ 142.7
Spring Mobile [Member] | Discontinued Operations, Disposed of by Sale [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Disposal Group, Including Discontinued Operation, Depreciation and Amortization 20.1 28.4 28.5
DisposalGroupIncludingDiscontinuedOperationGoodwillandAssetImpairments 0.0 377.0 14.2
DisposalGroupIncludingDiscontinuedOperationInventoryReserveProvision 12.7 12.9 17.6
Discontinued Operations [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Payments to Acquire Property, Plant, and Equipment $ 7.5 $ 22.2 $ 36.9