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Revenue recognition - Unamortized Deferred Selling Costs (Details) - USD ($) $ in Millions	Nov. 02, 2019	Feb. 02, 2019	Nov. 03, 2018
Revenue from Contract with Customer [Abstract]
Other current assets	$ 23.5	$ 23.8	$ 30.0
Other assets	76.1	75.4	87.1
Deferred ESP selling costs	$ 99.6	$ 99.2	$ 117.1

X

- Definition

Deferred Revenue Extended Service Plan Costs Noncurrent

+ References

No definition available.

+ Details

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X

- Definition

Amount of other miscellaneous assets expected to be realized or consumed within one year or operating cycle, if longer.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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