Intangible Assets and Goodwill - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Sep. 30, 2018	Apr. 01, 2018	Dec. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 4,400
Finite-Lived Intangible Assets, Amortization Expense, Year Two	4,400
Finite-Lived Intangible Assets, Amortization Expense, Year Three	4,400
Finite-Lived Intangible Assets, Amortization Expense, Year Four	4,400
Finite-Lived Intangible Assets, Amortization Expense, Year Five	4,400
Intangible Assets and Goodwill (Textuals)
Amortization expense of amortizable intangible assets	1,100		$ 1,100
Goodwill	31,450			$ 30,453
Patents And Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	$ 25,415			25,410
Intangible Assets and Goodwill (Textuals)
Finite-Lived Intangible Assets, Weighted-Average Useful Life	12 years
Customer relationships and other intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	$ 13,180			13,011
Intangible Assets and Goodwill (Textuals)
Finite-Lived Intangible Assets, Weighted-Average Useful Life	21 years
Consumer
Intangible Assets and Goodwill (Textuals)
Goodwill	$ 9,730			8,670
PHARMACEUTICAL
Intangible Assets and Goodwill (Textuals)
Goodwill	8,988			9,063
Medical Devices
Intangible Assets and Goodwill (Textuals)
Goodwill	12,732			$ 12,720
Goodwill | AdvancedSterilizationProducts
Finite-Lived Intangible Assets [Line Items]
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	300
Alios Biopharma Inc | Purchased In-Process Research And Development
Finite-Lived Intangible Assets [Line Items]
Impairment charge	$ 900	$ 800