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PLANT, PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of Plant, Property and Equipment

	2019									2018
at December 31	Cost			Accumulated Depreciation			Net Book Value			Cost			Accumulated Depreciation			Net Book Value
(millions of Canadian $)
Canadian Natural Gas Pipelines
NGTL System
Pipeline	11,556			4,846			6,710			10,764			4,500			6,264
Compression	4,205			1,771			2,434			3,289			1,677			1,612
Metering and other	1,296			609			687			1,247			613			634
	17,057			7,226			9,831			15,300			6,790			8,510
Under construction	3,181			—			3,181			2,111			—			2,111
	20,238			7,226			13,012			17,411			6,790			10,621
Canadian Mainline
Pipeline	10,145			7,109			3,036			10,077			6,777			3,300
Compression	3,867			2,823			1,044			3,642			2,656			986
Metering and other	643			219			424			652			241			411
	14,655			10,151			4,504			14,371			9,674			4,697
Under construction	60			—			60			149			—			149
	14,715			10,151			4,564			14,520			9,674			4,846
Other Canadian Natural Gas Pipelines1
Other	1,861			1,455			406			1,842			1,420			422
Under construction	1,276			—			1,276			124			—			124
	3,137			1,455			1,682			1,966			1,420			546
	38,090			18,832			19,258			33,897			17,884			16,013
U.S. Natural Gas Pipelines
Columbia Gas
Pipeline	9,708			389			9,319			6,711			251			6,460
Compression	4,094			206			3,888			2,932			132			2,800
Metering and other	3,244			125			3,119			2,884			75			2,809
	17,046			720			16,326			12,527			458			12,069
Under construction	425			—			425			4,347			—			4,347
	17,471			720			16,751			16,874			458			16,416
ANR
Pipeline	1,594			472			1,122			1,600			443			1,157
Compression	2,050			436			1,614			1,978			388			1,590
Metering and other	1,245			355			890			1,217			324			893
	4,889			1,263			3,626			4,795			1,155			3,640
Under construction	252			—			252			272			—			272
	5,141			1,263			3,878			5,067			1,155			3,912

	2019									2018
at December 31	Cost			Accumulated Depreciation			Net Book Value			Cost			Accumulated Depreciation			Net Book Value
(millions of Canadian $)
Other U.S. Natural Gas Pipelines
GTN	2,257			969			1,288			2,322			951			1,371
Great Lakes	2,090			1,208			882			2,180			1,251			929
Columbia Gulf	2,597			114			2,483			1,753			74			1,679
Midstream2	302			42			260			1,212			91			1,121
Other3	1,228			574			654			1,190			474			716
	8,474			2,907			5,567			8,657			2,841			5,816
Under construction	164			—			164			846			—			846
	8,638			2,907			5,731			9,503			2,841			6,662
	31,250			4,890			26,360			31,444			4,454			26,990
Mexico Natural Gas Pipelines
Pipeline	2,988			340			2,648			3,172			301			2,871
Compression	486			54			432			506			41			465
Metering and other	643			124			519			640			91			549
	4,117			518			3,599			4,318			433			3,885
Under construction	2,321			—			2,321			1,990			—			1,990
	6,438			518			5,920			6,308			433			5,875
Liquids Pipelines
Keystone Pipeline System
Pipeline	9,378			1,403			7,975			9,780			1,271			8,509
Pumping equipment	1,035			204			831			1,065			184			881
Tanks and other	3,488			556			2,932			3,598			488			3,110
	13,901			2,163			11,738			14,443			1,943			12,500
Under construction	47			—			47			18			—			18
	13,948			2,163			11,785			14,461			1,943			12,518
Intra-Alberta Pipelines4
Pipeline	138			2			136			762			22			740
Pumping equipment	—			—			—			104			3			101
Tanks and other	56			2			54			291			8			283
	194			4			190			1,157			33			1,124
Under construction	—			—			—			84			—			84
	194			4			190			1,241			33			1,208
	14,142			2,167			11,975			15,702			1,976			13,726
Power and Storage
Natural Gas5,6	1,256			522			734			2,062			708			1,354
Natural Gas Storage and Other	742			181			561			741			169			572
	1,998			703			1,295			2,803			877			1,926
Under construction6	6			—			6			1,735			—			1,735
	2,004			703			1,301			4,538			877			3,661
Corporate	883			208			675			448			210			238
	92,807			27,318			65,489			92,337			25,834			66,503

1 Includes Foothills, Ventures LP, Great Lakes Canada and Coastal GasLink.

2 The Company completed the sale of certain Columbia midstream assets on August 1, 2019. Refer to Note 27, Acquisitions and dispositions, for additional information.

3 Includes Portland, North Baja, Tuscarora and Crossroads.

4 The Company completed the sale of an 85 per cent equity interest in Northern Courier on July 17, 2019 and recorded its remaining 15 per cent interest as an equity investment. Refer to Note 10, Equity Investments, and Note 27, Acquisitions and dispositions, for additional information.

5 Includes Grandview, Bécancour and the Alberta cogeneration natural gas-fired facilities at December 31, 2019.

6

The Company completed the sale of the Coolidge generating station on May 21, 2019. Refer to Note 27, Acquisition and dispositions, for additional information. At July 30, 2019, the cost and accumulated depreciation of the Halton Hills and Napanee power plants were reclassified as Assets held for sale. Refer to Note 6, Assets held for sale, for additional information.

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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

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-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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