Segment Information - Summary of Activity by Segment (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Oct. 29, 2022	Oct. 30, 2021	Oct. 29, 2022	Oct. 30, 2021
Segment Reporting Information [Line Items]
Sales	$ 1,582.7	$ 1,537.8	$ 5,175.9	$ 5,014.7
Operating income (loss):	48.4	106.9	235.4	501.0
Interest expense, net	(3.6)	(4.1)	(11.4)	(12.4)
Other non-operating expense, net	(2.7)	(1.1)	(139.6)	(0.9)
Income before income taxes	42.1	101.7	84.4	487.7
Pre-tax litigation charges	0.0	0.0	190.0	0.0
Blue Nile
Segment Reporting Information [Line Items]
Acquisition and integration related costs	1.5		4.1
North America
Segment Reporting Information [Line Items]
Sales	1,464.8	1,394.2	4,786.2	4,657.9
International segment
Segment Reporting Information [Line Items]
Sales	95.3	120.9	316.9	309.0
Other segment
Segment Reporting Information [Line Items]
Sales	22.6	22.7	72.8	47.8
Reportable segments \| North America
Segment Reporting Information [Line Items]
Sales	1,464.8	1,394.2	4,786.2	4,657.9
Operating income (loss):	65.4	123.8	300.3	573.1
Pre-tax litigation charges			190.0
Asset impairments, net		0.7		2.0
Gain on sale of financing receivable				1.4
Restructuring charges				1.0
Reportable segments \| North America \| Fair Value Adjustment to Inventory
Segment Reporting Information [Line Items]
Operating income (loss):	5.0		15.2
Reportable segments \| North America \| Rocksbox
Segment Reporting Information [Line Items]
Acquisition and integration related costs				1.1
Reportable segments \| North America \| Diamonds Direct
Segment Reporting Information [Line Items]
Acquisition and integration related costs		2.6		2.6
Reportable segments \| North America \| Blue Nile
Segment Reporting Information [Line Items]
Acquisition and integration related costs	4.7		7.3
Reportable segments \| International segment
Segment Reporting Information [Line Items]
Sales	95.3	120.9	316.9	309.0
Operating income (loss):	(6.5)	0.2	(14.9)	(4.0)
Reportable segments \| Other segment
Segment Reporting Information [Line Items]
Sales	22.6	22.7	72.8	47.8
Operating income (loss):	(0.3)	(0.4)	4.5	(1.4)
Corporate and unallocated expenses
Segment Reporting Information [Line Items]
Operating income (loss):	$ (10.2)	(16.7)	$ (54.5)	(66.7)
Restructuring charges		$ 1.7		$ 2.3

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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