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Restructuring plans - Schedule of Plan Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 42 Months Ended
--- | --- | --- | ---
Jul. 31, 2021 | Aug. 01, 2020 | Jul. 31, 2021 | Aug. 01, 2020 | Jul. 31, 2021
Restructuring Reserve [Roll Forward] |  |  |  |  |
Charged (credited) to expense | $ (0.9) | $ 28.9 | $ (1.6) | $ 41.6 |
Signet Path to Brilliance |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 10.2 |  |
Payments and other adjustments |  |  | (1.4) |  |
Charged (credited) to expense | (0.9) | $ 28.7 | (1.6) | $ 41.0 | $ 251.0
Ending balance | 7.2 |  | 7.2 |  | 7.2
Termination benefits | Signet Path to Brilliance |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 2.1 |  |
Payments and other adjustments |  |  | (0.9) |  |
Charged (credited) to expense | (0.4) |  | (1.1) |  | 48.8
Ending balance | 0.1 |  | 0.1 |  | 0.1
Store closure and other costs | Signet Path to Brilliance |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 8.1 |  |
Payments and other adjustments |  |  | (0.5) |  |
Charged (credited) to expense |  |  | (0.5) |  |
Ending balance | $ 7.1 |  | $ 7.1 |  | $ 7.1

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3367-108585 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237686&loc=d3e17752-110868 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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