v3.10.0.1

Supplemental Financial Information - Depreciation, Amortization and Impairment (Parenthetical) (Detail) - In-Process Research and Development [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Impairment charges	$ 23	$ 0
Freescale Semiconductor, Ltd. [Member]
Property, Plant and Equipment [Line Items]
Impairment charges	$ 16	$ 89

X

- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=nxpi_FreescaleSemiconductorLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: