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Property, Plant and Equipment
12 Months Ended
Jan. 02, 2022
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
At the end of fiscal years 2021 and 2020, property, plant and equipment at cost and accumulated depreciation were:
(Dollars in Millions)20212020
Land and land improvements$884 882 
Buildings and building equipment12,882 12,502 
Machinery and equipment29,774 29,104 
Construction in progress4,139 4,316 
Total property, plant and equipment, gross$47,679 46,804 
Less accumulated depreciation28,717 28,038 
Total property, plant and equipment, net(1)
$18,962 18,766 

The Company capitalizes interest expense as part of the cost of construction of facilities and equipment. Interest expense capitalized in fiscal years 2021, 2020 and 2019 was $49 million, $63 million and $70 million, respectively.
Depreciation expense, including the amortization of capitalized interest in fiscal years 2021, 2020 and 2019 was $2.7 billion, $2.6 billion and $2.5 billion, respectively.
Upon retirement or other disposal of property, plant and equipment, the costs and related amounts of accumulated depreciation or amortization are eliminated from the asset and accumulated depreciation accounts, respectively. The difference, if any, between the net asset value and the proceeds are recorded in earnings.