Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.20.1
Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Feb. 01, 2020
Feb. 02, 2019
Feb. 01, 2020
Feb. 02, 2019
Feb. 03, 2018
Income Tax Contingency [Line Items]          
Benefit resulting from the re-measurement of net deferred tax liabilities         $ 562.0
Benefit from continued analysis of the TJCA impacts       $ 16.2  
Goodwill impairment     $ 313.0 2,727.0 0.0
Operating loss carryforward, credit carryforward and capital loss carryforward   $ 102.2   102.2  
Valuation allowance $ 18.5 42.6 18.5 42.6  
Unrecognized tax benefits 28.9 35.4 28.9 $ 35.4 $ 43.8
Unrecognized tax benefits that, if recognized, would affect the effective tax rate 23.0   23.0    
Liability for potential interest and penalties 3.3   3.3    
Minimum          
Income Tax Contingency [Line Items]          
Decrease in unrecognized tax benefits is reasonably possible 9.0   9.0    
Maximum          
Income Tax Contingency [Line Items]          
Decrease in unrecognized tax benefits is reasonably possible 11.0   $ 11.0    
Family Dollar          
Income Tax Contingency [Line Items]          
Goodwill impairment $ 313.0 $ 2,730.0