v2.4.0.6

Postretirement Benefit Plans - Classification of Pension Plan Assets (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Level I [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	$ 36	$ 25
Level I [Member] | Equity securities [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	3	1
Level I [Member] | Debt securities [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	20	17
Level I [Member] | Other [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	13	7
Level II [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	110	105
Level II [Member] | Equity securities [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	38	29
Level II [Member] | Debt securities [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	68	71
Level II [Member] | Other [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	4	5
Level III [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	3	4
Level III [Member] | Equity securities [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets
Level III [Member] | Debt securities [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets
Level III [Member] | Other [Member]
Major Funded Pension Plans Postretirement And Other Employee Benefits [Line Items]
Fair value of plan assets	$ 3	$ 4

X

- Definition

Major Funded Defined Benefit Plan Fair Value Of Plan Assets

+ References

No definition available.

+ Details

Name:	nxpi_MajorFundedDefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix:	nxpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	nxpi_MajorFundedPensionPlansPostretirementAndOtherEmployeeBenefitsLineItems
Namespace Prefix:	nxpi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration