Legal Proceedings (Details) $ in Millions	1 Months Ended				3 Months Ended		9 Months Ended
	Jun. 28, 2020 USD ($)	Apr. 30, 2020 USD ($)	Jan. 31, 2020 USD ($)	Jul. 31, 2018 USD ($)	Mar. 29, 2020 USD ($)	Dec. 29, 2019 USD ($) claimant	Sep. 27, 2020 USD ($) claimant patient	Oct. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)
ASR
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants							600
Pinnacle Acetabular Cup System
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants							8,200
Pelvic Meshes
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants							15,400
Risperdal
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants							10,400
XARELTO®
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants							15,000
Talc
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants							21,800
Invokana
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants							300
Physiomesh
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants							4,000
Opioid
Legal Proceeding (Textuals)
Product Liability Contingency Number Of Claimants						3,100
Judicial Ruling
Legal Proceeding (Textuals)
Damages awarded | $		$ 344.0	$ 344.0		$ 6.8	$ 8,000.0
Pending Litigation
Legal Proceeding (Textuals)
Loss Contingency, Estimate of Possible Loss | $									$ 4,000.0
Pending Litigation | Subsequent Event
Legal Proceeding (Textuals)
Loss Contingency, Estimate of Possible Loss | $								$ 5,000.0
Loss Contingency, Estimate of Additional Possible Loss | $								$ 1,000.0
DePuy ASR U.S. | settled litigation
Legal Proceeding (Textuals)
Number of patients in settlement | patient							10,000
Baby Powder
Legal Proceeding (Textuals)
Previous damages awarded and revised | $				$ 4,700.0
Baby Powder | Judicial Ruling
Legal Proceeding (Textuals)
Damages awarded | $	$ 2,100.0
Oklahoma Attorney General vs. Johnson & Johnson and JPI | settled litigation
Legal Proceeding (Textuals)
Damages awarded | $							$ 465.0
Oklahoma Attorney General vs. Johnson & Johnson and JPI | Judicial Ruling
Legal Proceeding (Textuals)
Damages awarded | $							$ 572.0