Legal Proceedings (Details) $ in Millions	1 Months Ended	3 Months Ended								12 Months Ended
	May 31, 2014 claim	Dec. 31, 2017 USD ($) patient claimant	Oct. 01, 2017 USD ($)	Jul. 02, 2017 USD ($)	Apr. 02, 2017 USD ($)	Jan. 01, 2017 USD ($)	Oct. 02, 2016 USD ($)	Jul. 03, 2016 USD ($)	Apr. 03, 2016 USD ($)	Dec. 31, 2017 patents patient claimant	Jan. 03, 2016 USD ($)
Loss Contingencies [Line Items]
Restructuring charge, after tax | $		$ 237	$ 136	$ 101	$ 121	$ 251	$ 76	$ 97	$ 120
Litigation expense | $		$ 645	$ 118	$ 493		$ 96	$ 55	$ 600	$ 66		$ 141
Xarelto
Loss Contingencies [Line Items]
Number of plaintiffs		22,900								22,900
ASR
Loss Contingencies [Line Items]
Number of plaintiffs		2,000								2,000
Pinnacle Acetabular Cup System
Loss Contingencies [Line Items]
Number of plaintiffs		10,000								10,000
Risperdal
Loss Contingencies [Line Items]
Number of plaintiffs		13,700								13,700
Pelvic Meshes
Loss Contingencies [Line Items]
Number of plaintiffs		53,600								53,600
Baby Powder
Loss Contingencies [Line Items]
Number of plaintiffs		6,610								6,610
Invokana [Member]
Loss Contingencies [Line Items]
Number of plaintiffs		1,100								1,100
Pending Litigation | Talc [Member]
Loss Contingencies [Line Items]
Class actions filed | claim	2
DePuy ASR U.S. | Settled Litigation
Loss Contingencies [Line Items]
Number of patients in settlement | patient		10,000								10,000
Medinol Ltd.
Loss Contingencies [Line Items]
Patents allegedly infringed | patents										4