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Significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2020

Significant Accounting Policies [abstract]

Respective Useful Lives of property, plant and equipment

		Useful life

Buildings		20 to 40 years

Machinery and other equipment

Machinery and equipment		7 to 20 years

Furniture and vehicles		5 to 10 years

Computer hardware		3 to 7 years

Respective Useful Lives of Available-for-Use Intangible Assets

		Useful life		Income statement location for amortization and impairment charges

Currently marketed products		5 to 20 years		"Cost of goods sold"

Technologies		10 to 20 years		"Cost of goods sold" or "Research and development"

Other (including computer software)		3 to 7 years		In the respective functional expense