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Annual report pursuant to Section 13 and 15(d)

PROPERTY, PLANT AND EQUIPMENT

v3.24.0.1
PROPERTY, PLANT AND EQUIPMENT
12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract] Ìý
Property, Plant and Equipment
NOTE 6 - PROPERTY, PLANT AND EQUIPMENT
The following table indicates the carrying value of each of the major classes of our depreciable assets:
December 31,
(In millions) 2023 2022
Land, land improvements and mineral rights $ 1,389Ìý $ 1,388Ìý
Buildings 946Ìý 921Ìý
Equipment 9,680Ìý 9,289Ìý
Other 302Ìý 238Ìý
Construction in progress 590Ìý 552Ìý
Total property, plant and equipment1
12,907Ìý 12,388Ìý
Allowance for depreciation and depletion (4,012) (3,318)
Property, plant and equipment, net $ 8,895Ìý $ 9,070Ìý
1 Includes right-of-use assets related to finance leases of $306 million and $408 million as of DecemberÌý31, 2023 and 2022, respectively.
We recorded depreciation expense of $932 million, $988 million and $848 million for the years ended DecemberÌý31, 2023, 2022 and 2021, respectively. Depreciation expense for the year ended December 31, 2022 includes $23Ìýmillion of accelerated depreciation related to the decision to indefinitely idle the coke facility at Middletown Works and $68Ìýmillion of accelerated depreciation related to the indefinite idle of the Indiana Harbor #4 blast furnace.
During the year ended December 31, 2022, we announced the permanent closure of Mountain State Carbon, which resulted in a $29Ìýmillion asset impairment charge.

The net book value of the mineral and land rights are as follows:
December 31,
(In millions) 2023 2022
Mineral rights:
Cost $ 783Ìý $ 780Ìý
Depletion (258) (225)
Net mineral rights $ 525Ìý $ 555Ìý
Land rights $ 427Ìý $ 434Ìý
We recorded depletion expense of $33 million, $38 million and $46 million for the years ended DecemberÌý31, 2023, 2022, and 2021, respectively.