Segment information - Schedule of Activity by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	May 04, 2024	Apr. 29, 2023
Segment Reporting Information [Line Items]
Total sales	$ 1,510.8	$ 1,668.0
Operating income (loss):	49.8	101.7
Interest income, net	8.6	5.6
Other non-operating income (expense), net	0.2	(0.4)
Income before income taxes	58.6	106.9
Restructuring charges	4.6	0.0
Asset impairments, net	2.4	1.8
Gain (Loss) Related to Litigation Settlement	0.0	(3.0)
Corporate and unallocated expenses
Segment Reporting Information [Line Items]
Operating income (loss):	(17.3)	(15.4)
North America
Segment Reporting Information [Line Items]
Total sales	1,420.0	1,561.2
North America | Reportable segments
Segment Reporting Information [Line Items]
Total sales	1,420.0	1,561.2
Operating income (loss):	83.2	124.7
Restructuring charges	0.6
Asset impairments, net	2.0
Gain (Loss) Related to Litigation Settlement		(3.0)
North America | Reportable segments | Blue Nile
Segment Reporting Information [Line Items]
Acquisition and integration related costs		7.8
International
Segment Reporting Information [Line Items]
Total sales	77.2	93.0
International | Reportable segments
Segment Reporting Information [Line Items]
Total sales	77.2	93.0
Operating income (loss):	(13.0)	(6.9)
Restructuring charges	4.0
Asset impairments, net	0.4
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	(1.3)
Other
Segment Reporting Information [Line Items]
Total sales	13.6	13.8
Other | Reportable segments
Segment Reporting Information [Line Items]
Total sales	13.6	13.8
Operating income (loss):	$ (3.1)	$ (0.7)