Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		36 Months Ended
		Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017	Sep. 03, 2018
Restructuring Cost and Reserve [Line Items]
Integration costs	[1]	$ 68	$ 86	$ 120	$ 163
Enterprise-wide Cost Reduction/Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred				152
Expected restructuring cost		1,200		$ 1,200
Percentage of expected costs to be non-cash				20.00%
Manufacturing Plant Network Optimization [Member] | Enterprise-wide Cost Reduction/Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost		800		$ 800
Restructuring costs incurred		283		283
Centralization of Corporate and Platform Functions [Member] | Enterprise-wide Cost Reduction/Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost		400		400
Restructuring costs incurred		$ 217		217
Business Integration Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred				$ 29
Hospira [Member]
Restructuring Cost and Reserve [Line Items]
Expected integration related costs, period				3 years
Hospira [Member] | Return of Acquired Rights [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred				$ 215
Hospira [Member] | Business Integration Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred				$ 81
Forecast [Member] | Hospira [Member]
Restructuring Cost and Reserve [Line Items]
Integration costs						$ 1,000

[1] Integration costs represent external, incremental costs directly related to integrating acquired businesses, and primarily include expenditures for consulting and the integration of systems and processes. In the second quarter and first six months of 2018, integration costs were primarily related to our acquisition of Hospira. In the second quarter and first six months of 2017, integration costs were primarily related to our acquisitions of Hospira and Medivation, including a net gain of $12 million related to the settlement of the Hospira U.S. qualified defined benefit pension plan (see Note 10).