Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 29, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	The accompanying unaudited interim consolidated financial statements and related notes should be read in conjunction with the audited Consolidated Financial Statements of Johnson & Johnson and its subsidiaries (the Company) and related notes as contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 29, 2019. The unaudited interim financial statements include all adjustments (consisting only of normal recurring adjustments) and accruals necessary in the judgment of management for a fair statement of the results for the periods presented. Columns and rows within tables may not add due to rounding. Percentages have been calculated using actual, non-rounded figures. Use of Estimates The extent to which COVID-19 impacts the Company’s business and financial results will depend on numerous evolving factors including, but not limited to: the magnitude and duration of COVID-19, the extent to which it will impact worldwide macroeconomic conditions including interest rates, employment rates and health insurance coverage, the speed of the anticipated recovery, and governmental and business reactions to the pandemic. The Company assessed certain accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to the Company and the unknown future impacts COVID-19 as of March 29, 2020 and through the date of this report. The accounting matters assessed included, but were not limited to, the Company’s allowance for doubtful accounts and credit losses, inventory and related reserves and the carrying value of the goodwill and other long-lived assets. While there was not a material impact to the Company’s consolidated financial statements as of and for the quarter ended March 29, 2020, the Company’s future assessment of the magnitude and duration of COVID-19, as well as other factors, could result in material impacts to the Company’s consolidated financial statements in future reporting periods. New Accounting Standards The Company assesses the adoption impacts of recently issued accounting standards by the Financial Accounting Standards Board on the Company's financial statements and below describes the impacts from newly adopted standards, as well as material updates to previous assessments, if any, from the Company’s Annual Report on Form 10-K for the fiscal year ended December 29, 2019. Recently Adopted Accounting Standards ASU 2018-18: Collaborative Arrangements The Company adopted this standard as of the beginning of the fiscal year 2020. This update clarifies the interaction between ASC 808, Collaborative Arrangements and ASC 606, Revenue from Contracts with Customers. The update clarifies that certain transactions between participants in a collaborative arrangement should be accounted for under ASC 606 when the counterparty is a customer. In addition, the update precludes an entity from presenting consideration from a transaction in a collaborative arrangement as revenue if the counterparty is not a customer for that transaction. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. ASU 2016-13: Financial Instruments - Credit Losses The Company adopted this standard as of the beginning of the fiscal year 2020. This update introduces the current expected credit loss (CECL) model, which requires an entity to measure credit losses for certain financial instruments and financial assets, including trade receivables. Under this update, on initial recognition and at each reporting period, an entity is required to recognize an allowance that reflects the entity’s current estimate of credit losses expected to be incurred over the life of the financial instrument. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. Reclassification Certain prior period amounts have been reclassified to conform to current year presentation.