Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 7 Months Ended 11 Months Ended 12 Months Ended
Aug. 04, 2018
Jul. 29, 2017
Aug. 04, 2018
Jul. 29, 2017
Aug. 04, 2018
Dec. 31, 2017
Jan. 28, 2017
Feb. 03, 2018
Income Taxes                
Federal statutory rate (as a percent)         21.00% 35.00%    
Provisional discrete net tax benefit             $ (0.3)  
Incremental withholding liabilities on investment in foreign subsidiaries               $ (17.3)
Effective income tax rate (as a percent) 16.70% 32.50% 18.40% 35.00%        
Accounting Standards Update 2016-09 | Measurement period adjustments                
Income Taxes                
State valuation allowance $ 3.1   $ 3.1          
Tax deficiencies related vesting of stock-based awards       $ 2.2