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Property, Plant and Equipment, net | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment, net | 6. Property, Plant and Equipment, net Property, plant and equipment consist of (in millions):
|  | Estimated |  | December 31, |
|  | Useful Lives |  | 2023 |  |  | 2022 |
Information technology assets |  | 1-7 Years |  | $ | 46 |  |  | $ | 47 |
Operating equipment (1) |  | 2-15 Years |  |  | 164 |  |  |  | 141 |
Buildings and land (2) |  | 5-35 Years |  |  | 97 |  |  |  | 94 |
Construction in progress |  |  |  |  | 2 |  |  |  | 4 |
Total property, plant and equipment |  |  |  |  | 309 |  |  |  | 286 |
Less: accumulated depreciation |  |  |  |  | (178 | ) |  |  | (167 | )
Property, plant and equipment, net |  |  |  | $ | 131 |  |  | $ | 119 |
(1) Includes finance ROU assets. (2) Land has an indefinite life Depreciation expense was $21 million, $17 million and $21 million for the years ended December 31, 2023, 2022 and 2021, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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