v3.6.0.2

Postretirement Benefit Plans - Additional Information (Detail) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) Companies Participants | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2017
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |  |
Amount included in statement of operations | $ 102 | $ 69 | $ 77 |
Defined contribution plans | 44 | 21 | 21 |
PME multi-employer plans | 32 | 32 | 41 |
Total cost of defined-benefit plans | 26 | 16 | 15 |
Ongoing cost | 27 | 20 | 15 |
Gain on curtailments and settlements | 1 | 4 |  |
Estimated net actuarial loss (gain) | 2 |  |  |
Estimated prior service cost |  |  |  |
Pension plan assets | 172 |  |  |
Employer contribution to defined-benefit pension plans | 11 |  |  |
Expected cash payments to unfunded plans | 6 |  |  |
Accumulated postretirement health care benefit obligation | 18 | $ 54 |  |
German and Japanese [Member] |  |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |  |
Pension plan assets | $ 161 |  |  |
Increase [Member] |  |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |  |
Increase (decrease) of discount rate | 1.00% |  |  |
Increase (decrease) in net periodic pension cost | $ 3 |  |  |
Decrease [Member] |  |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |  |
Increase (decrease) of discount rate | 1.00% |  |  |
Increase (decrease) in net periodic pension cost | $ 4 |  |  |
PME Multi-Employer Plan [Member] |  |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |  |
Number of companies | Companies | 1,300 |  |  |
Number of participants | Participants | 616,000 |  |  |
Contribution rate | 26.10% |  |  |
PME Multi-Employer Plan [Member] | Scenario, Forecast [Member] |  |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |  |
Contribution rate |  |  |  | 25.80%

X
- Definition Defined Benefit Pension Costs Discount Rate In Sensitivity Analysis + References No definition available. + Details
Name: | nxpi_DefinedBenefitPensionCostsDiscountRateInSensitivityAnalysis
Namespace Prefix: | nxpi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Pension Costs Increase (Decrease) + References No definition available. + Details
Name: | nxpi_DefinedBenefitPensionCostsIncreaseDecrease
Namespace Prefix: | nxpi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined Benefit Plan Periodic Costs Before Settlements and Curtailments + References No definition available. + Details
Name: | nxpi_DefinedBenefitPlanPeriodicCostsBeforeSettlementsAndCurtailments
Namespace Prefix: | nxpi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gain loss on defined benefit plan restructuring curtailments and settlements. + References No definition available. + Details
Name: | nxpi_GainLossOnDefinedBenefitPlanRestructuringCurtailmentsAndSettlements
Namespace Prefix: | nxpi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Multiemployer Plan Period Cost Recognized + References No definition available. + Details
Name: | nxpi_MultiemployerPlanPeriodCostRecognized
Namespace Prefix: | nxpi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number Of Companies + References No definition available. + Details
Name: | nxpi_NumberOfCompanies
Namespace Prefix: | nxpi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Employees Participated In Plan + References No definition available. + Details
Name: | nxpi_NumberOfEmployeesParticipatedInPlan
Namespace Prefix: | nxpi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other Postretirement Benefit Accumulated Benefit Obligation + References No definition available. + Details
Name: | nxpi_OtherPostretirementBenefitAccumulatedBenefitObligation
Namespace Prefix: | nxpi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Pension Plans, Postretirement and Other Employee Benefits [Line Items] + References No definition available. + Details
Name: | nxpi_PensionPlansPostretirementAndOtherEmployeeBenefitsLineItems
Namespace Prefix: | nxpi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unfunded Defined Benefit Pension Plan Expected Future Benefit Payments Next Fiscal Year + References No definition available. + Details
Name: | nxpi_UnfundedDefinedBenefitPensionPlanExpectedFutureBenefitPaymentsNextFiscalYear
Namespace Prefix: | nxpi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6749337 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6520858 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of contributions required by a collective bargaining arrangement to all contributions required of an employer related to a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
Name: | us-gaap_MultiemployerPlansCollectiveBargainingArrangementPercentageOfEmployersContributions
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
Name: | us-gaap_PensionExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=nxpi_ForeignCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=nxpi_IncreaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=nxpi_DecreaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MultiemployerPlanTypeAxis=us-gaap_MultiemployerPlansPensionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |