Property, Plant & Equipment (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ (6,361)	$ (6,190)
Property, plant and equipment, net	3,318	3,414
Disposed of fully depreciated buildings, machinery and equipment	6
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	101	102
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,607	1,593
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,971	$ 7,909

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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Amount of divestiture of long-lived, 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, furniture and fixtures, and computer equipment.

+ 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.

+ References

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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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