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Accounts receivable - Past Due Status (Details) $ in Millions | Aug. 01, 2020 USD ($)
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Financing Receivable, Past Due [Line Items] |
Current | $ 23.2
Total at amortized cost | 24.3
1 - 30 days past due |
Financing Receivable, Past Due [Line Items] |
Financing receivable, past due | 1.0
31 - 60 days past due |
Financing Receivable, Past Due [Line Items] |
Financing receivable, past due | $ 0.1

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