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Segment Reporting - Equity Loss from Affiliates and Depreciation Included in Segment Profits (Details) - Operating Segments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Equity loss from affiliates	$ 11	$ 6	$ 0
Depreciation	164	150	124
Pharmaceutical
Segment Reporting Information [Line Items]
Equity loss from affiliates	11	6	0
Depreciation	6	6	9
Animal Health
Segment Reporting Information [Line Items]
Equity loss from affiliates	0	0	0
Depreciation	158	143	105
All Other
Segment Reporting Information [Line Items]
Equity loss from affiliates	0	0	0
Depreciation	$ 0	$ 1	$ 10

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

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- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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