Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Narrative (Details) - USD ($) $ in Millions	6 Months Ended		9 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		$ 32
Focused Company Plan [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost	$ 1,200		$ 1,200
Restructuring costs incurred	566		549
2017-2019 Initiatives and Organizing for Growth [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		180
Manufacturing Cost Reduction [Member] | Focused Company Plan [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost	$ 400		$ 400
Percentage of expected costs to be non-cash	20.00%
Business Integration Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		(199)
Business Integration Costs [Member] | Hospira [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		$ 51