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SIGNIFICANT ACCOUNTING POLICIES (Schedule of Other Intangible Assets Depreciation Rates) (Details)	12 Months Ended
	Dec. 31, 2018
Core Technology [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Other intangible assets amortization rate	2.00%
Core Technology [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Other intangible assets amortization rate	8.00%
Customer Relationships [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Other intangible assets amortization rate	3.00%
Customer Relationships [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Other intangible assets amortization rate	8.00%
Trademark [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Other intangible assets amortization rate	2.00%
Trademark [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Other intangible assets amortization rate	12.00%
Customer backlog [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Other intangible assets amortization rate	2.00%
Customer backlog [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Other intangible assets amortization rate	3.00%

X

- Definition

The amortization rate of other intangible assets.

+ References

No definition available.

+ Details

Name:	NICE_OtherIntangibleAssetsAmortizationRate
Namespace Prefix:	NICE_
Data Type:	num:percentItemType
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

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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=NICE_CoreTechnologyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_TrademarksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OrderOrProductionBacklogMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: