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Summary of Significant Accounting Standards and Policies - PP&E and accumulated depreciation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, plant and equipment and depreciation
PP&E impairment	$ 0
Property, plant and equipment, at cost	5,630	$ 5,362
Accumulated depreciation	(3,175)	(3,056)
Property, plant and equipment, net	2,455	2,306
Land
Property, plant and equipment and depreciation
Property, plant and equipment, at cost	207	202
Building
Property, plant and equipment and depreciation
Property, plant and equipment, at cost	802	748
Machinery and Equipment
Property, plant and equipment and depreciation
Property, plant and equipment, at cost	$ 4,621	$ 4,412

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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