Revenue recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	May 03, 2025	May 04, 2024
Disaggregation of Revenue [Line Items]
Total sales	$ 1,541.6	$ 1,510.8
Bridal
Disaggregation of Revenue [Line Items]
Total sales	692.7	681.3
Fashion
Disaggregation of Revenue [Line Items]
Total sales	549.4	545.3
Watches
Disaggregation of Revenue [Line Items]
Total sales	69.5	63.5
Service sales
Disaggregation of Revenue [Line Items]
Total sales	191.3	184.5
Other
Disaggregation of Revenue [Line Items]
Total sales	38.7	36.2
Kay
Disaggregation of Revenue [Line Items]
Total sales	579.1	567.5
Zales
Disaggregation of Revenue [Line Items]
Total sales	283.2	256.7
Jared
Disaggregation of Revenue [Line Items]
Total sales	260.0	249.5
Blue Nile
Disaggregation of Revenue [Line Items]
Total sales	77.6	75.8
James Allen
Disaggregation of Revenue [Line Items]
Total sales	39.4	57.9
Diamonds Direct
Disaggregation of Revenue [Line Items]
Total sales	84.1	82.6
Banter by Piercing Pagoda
Disaggregation of Revenue [Line Items]
Total sales	82.2	83.6
Peoples
Disaggregation of Revenue [Line Items]
Total sales	40.8	39.2
International segment
Disaggregation of Revenue [Line Items]
Total sales	80.1	77.2
Other
Disaggregation of Revenue [Line Items]
Total sales	15.1	20.8
Store
Disaggregation of Revenue [Line Items]
Total sales	1,188.1	1,155.1
E-commerce
Disaggregation of Revenue [Line Items]
Total sales	338.7	337.9
Other
Disaggregation of Revenue [Line Items]
Total sales	14.8	17.8
North America
Disaggregation of Revenue [Line Items]
Total sales	1,450.5	1,420.0
North America \| Bridal
Disaggregation of Revenue [Line Items]
Total sales	656.6	646.0
North America \| Fashion
Disaggregation of Revenue [Line Items]
Total sales	533.0	530.1
North America \| Watches
Disaggregation of Revenue [Line Items]
Total sales	47.8	42.7
North America \| Service sales
Disaggregation of Revenue [Line Items]
Total sales	185.4	178.6
North America \| Other
Disaggregation of Revenue [Line Items]
Total sales	27.7	22.6
North America \| Kay
Disaggregation of Revenue [Line Items]
Total sales	579.1	567.5
North America \| Zales
Disaggregation of Revenue [Line Items]
Total sales	283.2	256.7
North America \| Jared
Disaggregation of Revenue [Line Items]
Total sales	260.0	249.5
North America \| Blue Nile
Disaggregation of Revenue [Line Items]
Total sales	77.6	75.8
North America \| James Allen
Disaggregation of Revenue [Line Items]
Total sales	39.4	57.9
North America \| Diamonds Direct
Disaggregation of Revenue [Line Items]
Total sales	84.1	82.6
North America \| Banter by Piercing Pagoda
Disaggregation of Revenue [Line Items]
Total sales	82.2	83.6
North America \| Peoples
Disaggregation of Revenue [Line Items]
Total sales	40.8	39.2
North America \| International segment
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
North America \| Other
Disaggregation of Revenue [Line Items]
Total sales	4.1	7.2
North America \| Store
Disaggregation of Revenue [Line Items]
Total sales	1,125.3	1,094.3
North America \| E-commerce
Disaggregation of Revenue [Line Items]
Total sales	321.4	321.5
North America \| Other
Disaggregation of Revenue [Line Items]
Total sales	3.8	4.2
International segment
Disaggregation of Revenue [Line Items]
Total sales	80.1	77.2
International segment \| Bridal
Disaggregation of Revenue [Line Items]
Total sales	36.1	35.3
International segment \| Fashion
Disaggregation of Revenue [Line Items]
Total sales	16.4	15.2
International segment \| Watches
Disaggregation of Revenue [Line Items]
Total sales	21.7	20.8
International segment \| Service sales
Disaggregation of Revenue [Line Items]
Total sales	5.9	5.9
International segment \| Other
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| Kay
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| Zales
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| Jared
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| Blue Nile
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| James Allen
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| Diamonds Direct
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| Banter by Piercing Pagoda
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| Peoples
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| International segment
Disaggregation of Revenue [Line Items]
Total sales	80.1	77.2
International segment \| Other
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
International segment \| Store
Disaggregation of Revenue [Line Items]
Total sales	62.8	60.8
International segment \| E-commerce
Disaggregation of Revenue [Line Items]
Total sales	17.3	16.4
International segment \| Other
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other
Disaggregation of Revenue [Line Items]
Total sales	11.0	13.6
Other \| Bridal
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Fashion
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Watches
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Service sales
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Other
Disaggregation of Revenue [Line Items]
Total sales	11.0	13.6
Other \| Kay
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Zales
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Jared
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Blue Nile
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| James Allen
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Diamonds Direct
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Banter by Piercing Pagoda
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Peoples
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| International segment
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Other
Disaggregation of Revenue [Line Items]
Total sales	11.0	13.6
Other \| Store
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| E-commerce
Disaggregation of Revenue [Line Items]
Total sales	0.0	0.0
Other \| Other
Disaggregation of Revenue [Line Items]
Total sales	$ 11.0	$ 13.6

SIGNET JEWELERS LTD 10-Q