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SIGNIFICANT ACCOUNTING POLICIES (business combinations and prepaid product discounts) (Details)	12 Months Ended
	Dec. 31, 2022
Business ccmbinations
Measurement period	1 year
Maximum [Member]
Prepaid product discounts [Line Items]
Amortization period	14 years 6 months
Weighted-average [Member]
Prepaid product discounts [Line Items]
Amortization period	4 years

X

- Definition

The period over which prepaid product discounts are amortized and reflected as reductions of revenue in the consolidated statements of income.

+ References

No definition available.

+ Details

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

X

- Definition

In accounting for business combinations, the period over which adjustments may be recorded to the purchase price allocation. Also known as the measurement period.

+ References

No definition available.

+ Details

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

X

- Definition

[Line Items] for Prepaid product discounts [Table]

+ References

No definition available.

+ Details

Name:	dlx_PrepaidproductdiscountsLineItems
Namespace Prefix:	dlx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: