Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Narrative (Detail) $ in Millions	Dec. 31, 2023 USD ($)
Transforming to a More Focused Company Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date	$ 4,000
Transforming to a More Focused Company Plan [Member] | Biopharma [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date	1,500
Restructuring charges incurred to date	1,000
Realigning Our Cost Base Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date	1,700
Expected cost	3,000
Realigning Our Cost Base Program [Member] | Biopharma [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date	674
Restructuring charges incurred to date	665
Expected cost	$ 1,100