v3.10.0.1

Segments and Geographical Information - Goodwill Assigned to Segments (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Beginning balance, Cost	$ 9,020
Purchase price allocation to goodwill	11
Ending balance, Cost	8,971
Accumulated impairment at January 1, 2018	(154)
Accumulated impairment at December 31, 2018	(114)
Cost [Member]
Goodwill [Line Items]
Translation differences and other changes	(60)
Accumulated Impairment [Member]
Goodwill [Line Items]
Translation differences and other changes	40
HPMS [Member]
Goodwill [Line Items]
Beginning balance, Cost	8,750
Purchase price allocation to goodwill	11
Ending balance, Cost	8,701
Accumulated impairment at January 1, 2018	(154)
Accumulated impairment at December 31, 2018	(114)
HPMS [Member] | Cost [Member]
Goodwill [Line Items]
Translation differences and other changes	(60)
HPMS [Member] | Accumulated Impairment [Member]
Goodwill [Line Items]
Translation differences and other changes	40
Corporate and Other [Member]
Goodwill [Line Items]
Beginning balance, Cost	270	[1]
Purchase price allocation to goodwill	0	[1]
Ending balance, Cost	270	[1]
Accumulated impairment at January 1, 2018	0	[1]
Accumulated impairment at December 31, 2018	0	[1]
Corporate and Other [Member] | Cost [Member]
Goodwill [Line Items]
Translation differences and other changes	0	[1]
Corporate and Other [Member] | Accumulated Impairment [Member]
Goodwill [Line Items]
Translation differences and other changes	$ 0	[1]
[1] Corporate and Other is not a reporting segment under ASC 280 “Segment Reporting”.

X

- Definition

Goodwill foreign currency translation gain loss and other changes.

+ References

No definition available.

+ Details

Name:	nxpi_GoodwillForeignCurrencyTranslationGainLossAndOtherChanges
Namespace Prefix:	nxpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a,h)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a,h)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

X

- Details

Name:	us-gaap_StatementOperatingActivitiesSegmentAxis=nxpi_CostMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementOperatingActivitiesSegmentAxis=nxpi_AccumulatedImpairmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=nxpi_HighPerformanceMixedSignalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: