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Earnings Per Share Data - Narrative (Details) - shares	Jul. 30, 2022	Jul. 31, 2021
Earnings Per Share [Abstract]
Total dilutive and potentially dilutive securities outstanding (in shares)	0	0

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. Also, the number of shares of preferred stocks, other dilutive securities or potentially dilutive securities that validly exist and are outstanding as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	dds_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_EarningsPerShareAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration