Debt - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 01, 2021	Aug. 02, 2020	Aug. 01, 2021	Aug. 02, 2020
Tax (expense) benefit on interest rate swap adjustments
Measurement adjustment (losses) for interest rate swap	$ 0.2		$ 0.2
Reclassification of expense to interest expense	0.0		0.0
Ending balance	1,548.0		1,548.0
Interest rate swap 1
Accumulated Other Comprehensive Loss
Measurement adjustment (losses) for interest rate swap	0.0	$ (0.1)	0.0	$ (4.2)
Reclassification of expense to interest expense	7.1	2.0	9.3	3.3
Tax (expense) benefit on interest rate swap adjustments
Measurement adjustment (losses) for interest rate swap	0.0	0.0	0.0	0.6
Reclassification of expense to interest expense	(1.1)	(0.3)	(1.4)	(0.5)
Interest rate swap 2
Accumulated Other Comprehensive Loss
Measurement adjustment (losses) for interest rate swap	(1.5)		(1.5)
Reclassification of expense to interest expense	0.0		0.0
Accumulated other comprehensive loss, cash flow hedge | Interest rate swap 1
Accumulated Other Comprehensive Loss
Beginning balance	(6.0)	(13.4)	(7.9)	(11.0)
Tax (expense) benefit on interest rate swap adjustments
Ending balance	0.0	$ (11.8)	0.0	$ (11.8)
Accumulated other comprehensive loss, cash flow hedge | Interest rate swap 2
Accumulated Other Comprehensive Loss
Beginning balance	0.0		0.0
Tax (expense) benefit on interest rate swap adjustments
Ending balance	$ (1.3)		$ (1.3)