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Organization and principal accounting policies - Additional information (Details)	6 Months Ended
	Aug. 03, 2019 segment
Property, Plant and Equipment [Line Items]
Number of reportable segments (segment)	3
Minimum
Property, Plant and Equipment [Line Items]
Seasonal revenues, fourth quarter sales, percent	35.00%
Maximum
Property, Plant and Equipment [Line Items]
Seasonal revenues, fourth quarter sales, percent	40.00%

X

- Definition

Seasonal Revenues, Fourth Quarter Sales, Percent

+ References

No definition available.

+ Details

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X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Details

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X

- Details

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