Legal Proceedings (Details) $ in Millions		3 Months Ended								12 Months Ended
	Jan. 20, 2020 USD ($)	Dec. 29, 2019 USD ($) patient claimant	Sep. 29, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($)	Dec. 29, 2019 USD ($) patient claimant	Oct. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Restructuring charge, after tax | $		$ 214	$ 106	$ 116	$ 75	$ 190	$ 162	$ 152	$ 81
Litigation expense | $		$ 264	$ 4,000	$ 409	$ 423	$ 1,288		$ 703
Xarelto
Loss Contingencies [Line Items]
Number of plaintiffs		29,000								29,000
ASR
Loss Contingencies [Line Items]
Number of plaintiffs		1,100								1,100
Pinnacle Acetabular Cup System
Loss Contingencies [Line Items]
Number of plaintiffs		10,300								10,300
Risperdal
Loss Contingencies [Line Items]
Number of plaintiffs		11,900								11,900
Pelvic Meshes
Loss Contingencies [Line Items]
Number of plaintiffs		17,600								17,600
Invokana
Loss Contingencies [Line Items]
Number of plaintiffs		400								400
Physiomesh
Loss Contingencies [Line Items]
Number of plaintiffs		3,300								3,300
Talc
Loss Contingencies [Line Items]
Number of plaintiffs		17,900								17,900
Opiods [Member]
Loss Contingencies [Line Items]
Number of plaintiffs		2,800								2,800
Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss | $											$ 4,000
Judicial Ruling
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value | $		$ 8,000
Oklahoma Attorney General VS. Johnson And Johnson And JPI [Member] | Settled Litigation
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value | $										$ 465
Oklahoma Attorney General VS. Johnson And Johnson And JPI [Member] | Judicial Ruling
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value | $										$ 572
DePuy ASR U.S. | Settled Litigation
Loss Contingencies [Line Items]
Number of patients in settlement | patient		10,000								10,000
Baby Powder | Judicial Ruling | Damages from Product Defects
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value | $										$ 4,700
Subsequent Event | Judicial Ruling
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value | $	$ 344