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Property, Plant and Equipment, Net
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net Property, Plant and Equipment, Net
Property, plant and equipment, net, consisted of the following at December 31:
(In millions)
2019

 
2018

Land
$
81

 
$
84

Buildings and improvements
3,068

 
2,835

Machinery and equipment
5,436

 
4,844

Property, plant and equipment, gross
8,585

 
7,763

Accumulated depreciation and amortization
(5,232
)
 
(4,923
)
Total
$
3,353

 
$
2,840


Depreciation and amortization expense of property, plant and equipment, net, was $420 million, $374 million and $350 million in 2019, 2018 and 2017, respectively.