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

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- Definition Major Funded Defined Benefit Plan Fair Value Of Plan Assets + References No definition available. + Details
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Namespace Prefix: | nxpi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: | nxpi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration