Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 29, 2020	Mar. 31, 2019
Restructuring charges:
Employee terminations		$ 25	$ (2)
Asset impairments		31	9
Exit costs		0	3
Restructuring charges/(credits)	[1]	56	10
Transaction costs	[2]	3	0
Integration costs and other	[3]	10	36
Restructuring charges and certain acquisition-related costs	[4]	69	46
Additional depreciation––asset restructuring recorded in our condensed consolidated statements of income	[5]	0	13
Implementation costs recorded in our condensed consolidated statements of income as follows:
Implementation costs	[6]	24	26
Total costs associated with acquisitions and cost-reduction/productivity initiatives		117	92
Other (income)/deductions––net [Member]
Restructuring charges:
Net periodic benefit costs recorded in Other (income)/deductions––net		24	6
Cost of sales [Member]
Restructuring charges:
Additional depreciation––asset restructuring recorded in our condensed consolidated statements of income	[5]	5	9
Implementation costs recorded in our condensed consolidated statements of income as follows:
Implementation costs	[6]	10	13
Selling, informational and administrative expenses [Member]
Restructuring charges:
Additional depreciation––asset restructuring recorded in our condensed consolidated statements of income	[5]	0	1
Implementation costs recorded in our condensed consolidated statements of income as follows:
Implementation costs	[6]	15	9
Research and development expenses [Member]
Restructuring charges:
Additional depreciation––asset restructuring recorded in our condensed consolidated statements of income	[5]	(5)	3
Implementation costs recorded in our condensed consolidated statements of income as follows:
Implementation costs	[6]	$ 0	$ 4

[1] In the first quarter of 2020, restructuring charges mainly represent asset write-downs and employee termination costs associated with cost reduction initiatives. In the first quarter of 2019, restructuring charges were primarily associated with cost reduction initiatives and mainly represent asset write-downs, partially offset by the reversal of previously recorded accruals for employee termination costs and asset impairments related to our acquisition of Hospira. The restructuring activities for the first quarter of 2020 are associated with the following: • Biopharma ($2 million charge); Upjohn ($13 million charge); and Other ($41 million charge). The restructuring activities for the first quarter of 2019 are associated with the following: • Biopharma ($13 million charge); Upjohn ($13 million credit); and Other ($10 million charge).

[2] Transaction costs represent external costs for banking, legal, accounting and other similar services. In the first quarter of 2020, transaction costs relate to our acquisition of Array.

[3] Integration costs and other represent external, incremental costs directly related to integrating acquired businesses, such as expenditures for consulting and the integration of systems and processes, and certain other qualifying costs. In the first quarter of 2020, integration costs and other were mostly related to our acquisition of Array. In the first quarter of 2019, integration costs and other were primarily related to our acquisition of Hospira.

[4] Amounts may not add due to rounding.

[5] Additional depreciation––asset restructuring represents the impact of changes in the estimated useful lives of assets involved in restructuring actions.

[6] Implementation costs represent external, incremental costs directly related to implementing our non-acquisition-related cost-reduction/productivity initiatives.