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Fair value measurement (Tables)
12 Months Ended
Feb. 03, 2024
Fair Value Disclosures [Abstract]  
Schedule of Methods to Determine Fair Value on Instrument-Specific Basis The methods Signet uses to determine fair value on an instrument-specific basis are detailed below:
February 3, 2024January 28, 2023
(in millions)Carrying ValueLevel 1
Level 2
Carrying ValueLevel 1Level 2
Assets:
US Treasury securities
$5.3 $5.3 $ $5.7 $5.7 $— 
Foreign currency contracts
0.1  0.1 0.1 — 0.1 
US government agency securities
0.5  0.5 0.5 — 0.5 
Corporate bonds and notes
2.0  2.0 3.4 — 3.4 
Total assets
$7.9 $5.3 $2.6 $9.7 $5.7 $4.0 
Liabilities:
Foreign currency contracts
$(0.3)$ $(0.3)$(0.7)$— $(0.7)
Total liabilities $(0.3)$ $(0.3)$(0.7)$— $(0.7)
Schedule of Carrying Amount and Fair Value of Outstanding Debt The following table provides a summary of the carrying amount and fair value of outstanding debt:
February 3, 2024January 28, 2023
(in millions) Carrying
Value
Fair ValueCarrying
Value
Fair Value
4.70% Senior unsecured notes due in June 2024 (Level 2)
$147.7 $146.3 $147.4 $144.9