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SIGNIFICANT ACCOUNTING POLICIES (cash and cash equivalents and trade accounts receivable) (Details)	12 Months Ended
	Dec. 31, 2023
Cash and cash equivalents
Maximum maturity of cash equivalents	3 months
Trade accounts receivable
Period for write-off of trade accounts receivable	1 year

X

- Definition

The maximum maturity of investments in debt securities classified as cash equivalents in the entity's statement of financial position.

+ References

No definition available.

+ Details

Name:	dlx_Maximummaturityofcashequivalents
Namespace Prefix:	dlx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

Threshold period past due for trade accounts receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_ThresholdPeriodPastDueForWriteoffOfTradeAccountsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration