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Legal Proceedings (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Apr. 03, 2011 | Jul. 03, 2011 | Jun. 28, 2009
Loss Contingencies [Line Items] |  |  |
Litigation Loss | $ 593,000,000 |  |
Net litigation expense |  | 73,000,000 |
Legal Proceeding (Textuals) [Abstract] |  |  |
Amount given to plaintiff by jury | 482,000,000 |  |
Verdict in favor of the State's Attorney General and against Janssen and the Company |  | 257,700,000 |
Litigation settlement pre judgment interest | 111,000,000 |  |
Approximate damages initially awarded to Centocor, then subsequently reversed by the Court of Appeals |  |  | 1,700,000,000
Assessed damages for alleged consumer fraud as to DURAGESIC and RISPERDAL |  | 4,500,000 |
Settlement payment related fines disgorgement and interest |  | 78,000,000 |
Percentage of revenue represented by relinquished territories |  | 30.00% |
One time payment received by Company |  | 500,000,000 |
Merck [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Percentage of contribution to income profit split |  | 58.00% |
Percentage of revenue represented by retained territories |  | 70.00% |
Amount of revenue represented by retained territories |  | 2,800,000,000 |
COBI [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Percentage of contribution to income profit split |  | 42.00% |
Average Wholesale Price Litigation [Member] | Civil penalties [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Litigation Loss |  | 6,500,000 |
Risperdal [Member] | Civil penalties [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Litigation Loss |  | 327,100,000 |
Restitution [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Litigation Loss |  | $ 45,000,000 |

X
- Definition Amount given to plaintiff by jury. + Details
Name: | jnj_AmountGivenToPlaintiffByJury
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue represented by retained territories. + Details
Name: | jnj_AmountOfRevenueRepresentedByRetainedTerritories
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Assessed Damages for Alleged Consumer Fraud as to DURAGESIC and RISPERDAL. + Details
Name: | jnj_AssessedDamagesForAllegedConsumerFraudRelatedToCertainDrugs
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Awarded damages reversed. + Details
Name: | jnj_AwardedDamagesReversed
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Legal Proceeding Textuals Abstract. + Details
Name: | jnj_LegalProceedingTextualsAbstract
Namespace Prefix: | jnj
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Litigation loss. + Details
Name: | jnj_LitigationLoss
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Litigation settlement pre judgment interest. + Details
Name: | jnj_LitigationSettlementPreJudgmentInterest
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition One time payment received by Company. + Details
Name: | jnj_OneTimePaymentReceivedByCompany
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of contribution to income profit split. + Details
Name: | jnj_PercentageOfContributionToIncomeProfitSplit
Namespace Prefix: | jnj
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue represented by relinquished territories. + Details
Name: | jnj_PercentageOfRevenueRepresentedByRelinquishedTerritories
Namespace Prefix: | jnj
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue represented by retained territories. + Details
Name: | jnj_PercentageOfRevenueRepresentedByRetainedTerritories
Namespace Prefix: | jnj
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Settlement payment related fines disgorgement and interest. + Details
Name: | jnj_SettlementPaymentRelatedFinesDisgorgementAndInterest
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Verdict in favor of the State's Attorney General and against Janssen and the Company. + Details
Name: | jnj_VerdictAgainstCompany
Namespace Prefix: | jnj
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents the expenses incurred by the entity which are directly related and attributable to receiving an award in settlement of litigation. + Details
Name: | us-gaap_LitigationSettlementExpense
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. + Details
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Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
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