Investments - Summary of Available-for-sale Securities (Details) - USD ($) $ in Millions	Jan. 29, 2022	Jan. 30, 2021
Debt Securities, Available-for-sale [Line Items]
Total investment in debt securities	$ 12.1	$ 14.9
Unrealized Gain (Loss)	0.2	0.5
Fair Value	12.3	15.4
US Treasury securities
Debt Securities, Available-for-sale [Line Items]
Total investment in debt securities	4.5	5.6
Unrealized Gain (Loss)	0.0	0.1
Fair Value	4.5	5.7
US government agency securities
Debt Securities, Available-for-sale [Line Items]
Total investment in debt securities	2.0	3.1
Unrealized Gain (Loss)	0.0	0.1
Fair Value	2.0	3.2
Corporate bonds and notes
Debt Securities, Available-for-sale [Line Items]
Total investment in debt securities	5.6	6.2
Unrealized Gain (Loss)	0.2	0.3
Fair Value	$ 5.8	$ 6.5