Segment Reporting - Equity Loss from Affiliates and Depreciation Included in Segment Profits (Details) - Operating Segments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Equity income (loss) from affiliates	$ 39	$ 11	$ (6)
Depreciation	182	164	150
Pharmaceutical
Segment Reporting Information [Line Items]
Equity income (loss) from affiliates	39	11	(6)
Depreciation	5	6	6
Animal Health
Segment Reporting Information [Line Items]
Equity income (loss) from affiliates	0	0	0
Depreciation	177	158	143
Other segments
Segment Reporting Information [Line Items]
Equity income (loss) from affiliates	0	0	0
Depreciation	$ 0	$ 0	$ 1