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PROPERTY, PLANT AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment by Property Type

The following table sets forth our property, plant and equipment by property type, for the periods indicated:

						Estimated Useful Lives (Years)						December 31, 2020						December 31, 2019
												(Thousands of dollars)
Nonregulated
Gathering pipelines and related equipment						5 to 40						$	4,143,752					$	4,316,936
Processing and fractionation and related equipment						3 to 40						5,084,802						4,439,332
Storage and related equipment						3 to 54						798,785						684,635
Transmission pipelines and related equipment						5 to 54						810,434						797,678
General plant and other						2 to 60						647,675						610,013
Construction work in process						—						1,265,736						1,645,663
Regulated
Storage and related equipment						5 to 25						9,180						9,180
Natural gas transmission pipelines and related equipment						5 to 77						1,569,268						1,552,546
NGL transmission pipelines and related equipment						5 to 88						8,423,544						6,126,056
General plant and other						2 to 50						72,535						66,507
Construction work in process						—						247,224						1,802,946
Property, plant and equipment												23,072,935						22,051,492
Accumulated depreciation and amortization - nonregulated												(2,514,328)						(2,471,649)
Accumulated depreciation and amortization - regulated												(1,403,679)						(1,231,158)
Net property, plant and equipment												$	19,154,928					$	18,348,685

Average Depreciation Rates for Regulated Property

The average depreciation rates for our regulated property are set forth, by segment, in the following table for the periods indicated:

						Years Ended December 31,
						2020						2019						2018
Natural Gas Liquids						2.2%						2.0%						1.9%
Natural Gas Pipelines						2.1%						2.1%						2.1%

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- Definition

Tabular disclosure of the average depreciation rates of regulated property as of period end.

+ References

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- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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