Intangible Assets and Goodwill - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016	Jun. 16, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization expense of amortizable intangible assets			$ 3,000	$ 1,200	$ 1,200
Finite lived intangibles, amortization expense next twelve months			4,400
Finite lived intangibles, amortization expense, year two			4,400
Finite lived intangibles, amortization expense, year three			4,400
Finite lived intangibles, amortization expense, year four			4,400
Finite lived intangibles, amortization expense, year five			4,400
Goodwill			$ 31,906	22,805	21,629
Patents And Trademarks
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life			12 years
Customer relationships and other intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life			23 years
Actelion
Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 6,161			$ 5,986
Consumer
Finite-Lived Intangible Assets [Line Items]
Goodwill			8,875	8,263	7,240
Medical Devices
Finite-Lived Intangible Assets [Line Items]
Goodwill			13,922	11,702	11,500
Medical Devices | AMO
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 2,300	2,300
Goodwill		$ 1,700	1,700
Pharmaceutical
Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 9,109	$ 2,840	$ 2,889
Pharmaceutical | Actelion
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 25,000
Goodwill	$ 6,200