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Segment Reporting - Equity Income from Affiliates and Depreciation Included in Segment Profits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Depreciation			$ 1,020	$ 1,029
Operating Segments
Segment Reporting Information [Line Items]
Equity income from affiliates	$ 29	$ 29	86	77
Depreciation	63	68	124	127
Operating Segments | Pharma- ceutical
Segment Reporting Information [Line Items]
Equity income from affiliates	29	29	86	77
Depreciation	1	1	2	2
Operating Segments | Animal Health
Segment Reporting Information [Line Items]
Equity income from affiliates	0	0	0	0
Depreciation	$ 62	$ 67	$ 122	$ 125

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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