Properties, Plants, and Equipment, Net - Property Plant and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	$ 5,010	$ 4,663
Less: accumulated depreciation and amortization	2,626	2,449
Properties plants and equipment excluding construction work in progress	2,384	2,214
Construction work-in-progress	208	415
Properties, plants, and equipment, net	2,592	2,629
Land and land rights
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	98	99
Structures
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	1,033	938
Machinery and equipment
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	$ 3,879	$ 3,626

Properties plants and equipment excluding construction work in progress.

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- 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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- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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