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Fair value measurement (Tables)
9 Months Ended
Oct. 28, 2023
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:
October 28, 2023January 28, 2023October 29, 2022
(in millions)Carrying ValueLevel 1Level 2Carrying ValueLevel 1Level 2Carrying ValueLevel 1Level 2
Assets:
US Treasury securities
$4.6 $4.6 $ $5.7 $5.7 $— $6.1 $6.1 $— 
Foreign currency contracts
0.4  0.4 0.1 — 0.1 2.0 — 2.0 
US government agency securities
0.5  0.5 0.5 — 0.5 1.5 — 1.5 
Corporate bonds and notes
2.9  2.9 3.4 — 3.4 3.4 — 3.4 
Total assets
$8.4 $4.6 $3.8 $9.7 $5.7 $4.0 $13.0 $6.1 $6.9 
Liabilities:
Foreign currency contracts
$(0.6)$ $(0.6)$(0.7)$— $(0.7)$(0.2)$— $(0.2)
Total liabilities$(0.6)$ $(0.6)$(0.7)$— $(0.7)$(0.2)$— $(0.2)
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:
October 28, 2023January 28, 2023October 29, 2022
(in millions) Carrying
Value
Fair ValueCarrying
Value
Fair ValueCarrying
Value
Fair Value
Long-term debt:
Senior notes (Level 2)
$147.6 $144.4 $147.4 $144.9 $147.3 $142.5