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OPERATING PROPERTY AND EQUIPMENT, NET | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
OPERATING PROPERTY AND EQUIPMENT, NET | OPERATING PROPERTY AND EQUIPMENT, NET
| Estimated Useful Lives |  | December 31,
| 2020 |  | 2019
| (In years) |  | (In thousands)
Land | — |  | $ | 243,368 |  |  | $ | 245,034 |
Buildings and improvements | 10 — 40 |  | 926,230 |  |  | 904,567 |
Machinery and equipment | 3 — 10 |  | 864,941 |  |  | 866,654 |
Other | 3 — 10 |  | 104,683 |  |  | 125,760 |
|  |  | 2,139,222 |  |  | 2,142,015 |
Accumulated depreciation |  |  | (1,212,164) |  |  | (1,224,216) |
Total |  |  | $ | 927,058 |  |  | $ | 917,799 |
Depreciation expense related to operating property and equipment was $123 million, $118 million and $103 million in 2020, 2019 and 2018, 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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