v3.10.0.1

Segments and Geographical Information - Additional Information (Detail)				12 Months Ended
	Jan. 01, 2019 Segment	Feb. 06, 2017 Segment	Feb. 05, 2017 Segment	Dec. 31, 2018 Area
Segment Reporting Information [Line Items]
Number of reportable segments		1	2
Number of application areas | Area				8
Subsequent Event [Member]
Segment Reporting Information [Line Items]
Number of reportable segments	1

X

- Definition

Number of operational areas.

+ References

No definition available.

+ Details

Name:	nxpi_NumberOfOperationalAreas
Namespace Prefix:	nxpi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: