Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2022	May 01, 2021
Disaggregation of Revenue [Line Items]
Sales	$ 1,838.3	$ 1,688.8
Bridal
Disaggregation of Revenue [Line Items]
Sales	837.4	755.5
Fashion
Disaggregation of Revenue [Line Items]
Sales	675.9	671.1
Watches
Disaggregation of Revenue [Line Items]
Sales	86.7	64.1
Services
Disaggregation of Revenue [Line Items]
Sales	173.0	147.6
Other
Disaggregation of Revenue [Line Items]
Sales	65.3	50.5
Kay
Disaggregation of Revenue [Line Items]
Sales	667.3	676.8
Zales
Disaggregation of Revenue [Line Items]
Sales	347.7	370.8
Jared
Disaggregation of Revenue [Line Items]
Sales	314.1	284.1
Banter by Piercing Pagoda
Disaggregation of Revenue [Line Items]
Sales	119.0	148.8
Diamonds Direct
Disaggregation of Revenue [Line Items]
Sales	106.3	0.0
James Allen
Disaggregation of Revenue [Line Items]
Sales	93.3	101.5
Peoples
Disaggregation of Revenue [Line Items]
Sales	45.4	34.6
International segment banners
Disaggregation of Revenue [Line Items]
Sales	110.0	57.4
Other
Disaggregation of Revenue [Line Items]
Sales	35.2	14.8
Store
Disaggregation of Revenue [Line Items]
Sales	1,486.4	1,329.1
E-commerce
Disaggregation of Revenue [Line Items]
Sales	320.5	346.3
Other
Disaggregation of Revenue [Line Items]
Sales	31.4	13.4
North America
Disaggregation of Revenue [Line Items]
Sales	1,705.0	1,618.0
North America | Bridal
Disaggregation of Revenue [Line Items]
Sales	787.3	726.7
North America | Fashion
Disaggregation of Revenue [Line Items]
Sales	658.2	661.4
North America | Watches
Disaggregation of Revenue [Line Items]
Sales	51.5	46.9
North America | Services
Disaggregation of Revenue [Line Items]
Sales	166.0	145.9
North America | Other
Disaggregation of Revenue [Line Items]
Sales	42.0	37.1
North America | Kay
Disaggregation of Revenue [Line Items]
Sales	667.3	676.8
North America | Zales
Disaggregation of Revenue [Line Items]
Sales	347.7	370.8
North America | Jared
Disaggregation of Revenue [Line Items]
Sales	314.1	284.1
North America | Banter by Piercing Pagoda
Disaggregation of Revenue [Line Items]
Sales	119.0	148.8
North America | Diamonds Direct
Disaggregation of Revenue [Line Items]
Sales	106.3	0.0
North America | James Allen
Disaggregation of Revenue [Line Items]
Sales	93.3	101.5
North America | Peoples
Disaggregation of Revenue [Line Items]
Sales	45.4	34.6
North America | International segment banners
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
North America | Other
Disaggregation of Revenue [Line Items]
Sales	11.9	1.4
North America | Store
Disaggregation of Revenue [Line Items]
Sales	1,396.5	1,299.6
North America | E-commerce
Disaggregation of Revenue [Line Items]
Sales	300.4	318.4
North America | Other
Disaggregation of Revenue [Line Items]
Sales	8.1	0.0
International segment banners
Disaggregation of Revenue [Line Items]
Sales	110.0	57.4
International segment banners | Bridal
Disaggregation of Revenue [Line Items]
Sales	50.1	28.8
International segment banners | Fashion
Disaggregation of Revenue [Line Items]
Sales	17.7	9.7
International segment banners | Watches
Disaggregation of Revenue [Line Items]
Sales	35.2	17.2
International segment banners | Services
Disaggregation of Revenue [Line Items]
Sales	7.0	1.7
International segment banners | Other
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | Kay
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | Zales
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | Jared
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | Banter by Piercing Pagoda
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | Diamonds Direct
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | James Allen
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | Peoples
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | International segment banners
Disaggregation of Revenue [Line Items]
Sales	110.0	57.4
International segment banners | Other
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
International segment banners | Store
Disaggregation of Revenue [Line Items]
Sales	89.9	29.5
International segment banners | E-commerce
Disaggregation of Revenue [Line Items]
Sales	20.1	27.9
International segment banners | Other
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other
Disaggregation of Revenue [Line Items]
Sales	23.3	13.4
Other | Bridal
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Fashion
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Watches
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Services
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Other
Disaggregation of Revenue [Line Items]
Sales	23.3	13.4
Other | Kay
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Zales
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Jared
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Banter by Piercing Pagoda
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Diamonds Direct
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | James Allen
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Peoples
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | International segment banners
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Other
Disaggregation of Revenue [Line Items]
Sales	23.3	13.4
Other | Store
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | E-commerce
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Other | Other
Disaggregation of Revenue [Line Items]
Sales	$ 23.3	$ 13.4