Enbridge (ENB) 10-Q 6 Nov 20 2020 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 30, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	1-10934
Entity Registrant Name	ENBRIDGE INC.
Entity Incorporation, State or Country Code	Z4
Entity Tax Identification Number	98-0377957
Entity Address, Address Line One	200, 425 - 1st Street S.W.
Entity Address, City or Town	Calgary
Entity Address, State or Province	AB
Entity Address, Country	CA
Entity Address, Postal Zip Code	T2P 3L8
City Area Code	403
Local Phone Number	231-3900
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		2,025,219,063
Entity Central Index Key	0000895728
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Common shares
Entity Information [Line Items]
Title of 12(b) Security	Common Shares
Trading Symbol	ENB
Security Exchange Name	NYSE
6.375% Fixed-to-Floating Rate Subordinated Notes Series 2018-B due 2078
Entity Information [Line Items]
Title of 12(b) Security	6.375% Fixed-to-Floating Rate Subordinated Notes Series 2018-B due 2078
Trading Symbol	ENBA
Security Exchange Name	NYSE

CONSOLIDATED STATEMENTS OF EARN

CONSOLIDATED STATEMENTS OF EARNINGS - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating revenues
Total operating revenues	$ 9,110	$ 11,598	$ 29,079	$ 37,717
Operating expenses
Operating and administrative	1,554	1,741	4,955	5,061
Depreciation and amortization	935	844	2,766	2,526
Impairment of long-lived assets	0	105	0	105
Total operating expenses	7,015	10,010	23,373	31,225
Operating income/(loss)	2,095	1,588	5,706	6,492
Income from equity investments	315	333	805	1,159
Impairment of equity investments	(615)	0	(2,351)	0
Other income/(expense)
Net foreign currency gain/(loss)	173	(43)	(257)	311
Other	85	81	(8)	192
Interest expense	(718)	(644)	(2,105)	(1,966)
Earnings before income taxes	1,335	1,315	1,790	6,188
Income tax expense	(231)	(255)	(273)	(1,275)
Earnings	1,104	1,060	1,517	4,913
Earnings attributable to noncontrolling interests	(20)	(15)	(25)	(50)
Earnings attributable to controlling interests	1,084	1,045	1,492	4,863
Preference share dividends	(94)	(96)	(284)	(287)
Earnings attributable to common shareholders	$ 990	$ 949	$ 1,208	$ 4,576
Earnings per common share attributable to common shareholders (in Canadian dollars per share)	$ 0.49	$ 0.47	$ 0.60	$ 2.27
Diluted earnings per common share attributable to common shareholders (in Canadian dollars per share)	$ 0.49	$ 0.47	$ 0.60	$ 2.27
Commodity sales
Operating revenues
Total operating revenues	$ 4,595	$ 7,396	$ 14,920	$ 22,444
Operating expenses
Cost of goods and services sold	4,443	7,216	14,464	21,910
Transportation and other services
Operating revenues
Total operating revenues	4,075	3,748	11,609	12,188
Gas distribution
Operating revenues
Total operating revenues	440	454	2,550	3,085
Operating expenses
Cost of goods and services sold	$ 83	$ 104	$ 1,188	$ 1,623

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Earnings	$ 1,104	$ 1,060	$ 1,517	$ 4,913
Other comprehensive income/(loss), net of tax
Change in unrealized gain/(loss) on cash flow hedges	29	(170)	(532)	(597)
Change in unrealized gain/(loss) on net investment hedges	154	(74)	(221)	147
Other comprehensive income/(loss) from equity investees	(14)	2	6	19
Excluded components of fair value hedges	(1)	0	7	0
Reclassification to earnings of loss on cash flow hedges	58	28	138	74
Reclassification to earnings of pension and other postretirement benefits amounts	3	1	10	44
Foreign currency translation adjustments	(1,119)	704	1,817	(1,898)
Other comprehensive income/(loss), net of tax	(890)	491	1,225	(2,211)
Comprehensive income	214	1,551	2,742	2,702
Comprehensive (income)/loss attributable to noncontrolling interests	16	(41)	(79)	23
Comprehensive income attributable to controlling interests	230	1,510	2,663	2,725
Preference share dividends	(94)	(96)	(284)	(287)
Comprehensive income attributable to common shareholders	$ 136	$ 1,414	$ 2,379	$ 2,438

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD ($) $ in Millions	Total	Preference shares	Common shares	Additional paid-in capital	Retained earnings/(deficit)	Accumulated other comprehensive income/(loss)	Reciprocal shareholding	Total Enbridge Inc. shareholders' equity	Noncontrolling interests	AdjustmentRetained earnings/(deficit)
Balance at the beginning of the period at Dec. 31, 2018		$ 7,747	$ 64,677	$ 0	$ (5,538)	$ 2,672	$ (88)		$ 3,965
Increase (Decrease) in Stockholders' Equity
Stock-based compensation				28
Options exercised			58	(51)
Change in reciprocal interest				109			37
Repurchase of noncontrolling interest				65					(65)
Other				55
Earnings attributable to controlling interests	$ 4,863				4,863
Preference share dividends					(287)
Dividends paid to reciprocal shareholder					14
Common share dividends declared					(2,993)
Other					9	48			(4)
Other comprehensive income/(loss) attributable to common shareholders, net of tax						(2,138)
Earnings attributable to noncontrolling interests									50
Change in unrealized loss on cash flow hedges									(6)
Foreign currency translation adjustments									(67)
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax									(73)
Comprehensive income/(loss) attributable to noncontrolling interests	23								(23)
Contributions									10
Distributions									(194)
Redemption of preferred shares held by subsidiary									(300)
Balance at the end of the period at Sep. 30, 2019	$ 72,676	7,747	64,735	206	(3,932)	582	(51)	$ 69,287	3,389
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 2.214
Earnings per common share attributable to common shareholders (in Canadian dollars per share)	2.27
Diluted earnings per common share attributable to common shareholders (in Canadian dollars per share)	$ 2.27
Balance at the beginning of the period at Dec. 31, 2018		7,747	64,677	0	(5,538)	2,672	(88)		3,965
Balance at the end of the period at Dec. 31, 2019	$ 69,407	7,747	64,746	187	(6,314)	(272)	(51)		3,364	$ (66)
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Balance at the beginning of the period at Jun. 30, 2019		7,747	64,732	194	(3,392)	124	(51)		3,451
Increase (Decrease) in Stockholders' Equity
Stock-based compensation				7
Options exercised			3	(2)
Change in reciprocal interest	$ 0						0
Repurchase of noncontrolling interest	0								0
Other				7
Earnings attributable to controlling interests	1,045				1,045
Preference share dividends					(96)
Dividends paid to reciprocal shareholder					5
Common share dividends declared					(1,493)
Other					(1)	(7)			(10)
Other comprehensive income/(loss) attributable to common shareholders, net of tax						465
Earnings attributable to noncontrolling interests									15
Change in unrealized loss on cash flow hedges									(1)
Foreign currency translation adjustments									27
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax									26
Comprehensive income/(loss) attributable to noncontrolling interests	(41)								41
Contributions									1
Distributions									(94)
Redemption of preferred shares held by subsidiary									0
Balance at the end of the period at Sep. 30, 2019	$ 72,676	7,747	64,735	206	(3,932)	582	(51)	69,287	3,389
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.738
Earnings per common share attributable to common shareholders (in Canadian dollars per share)	0.47
Diluted earnings per common share attributable to common shareholders (in Canadian dollars per share)	$ 0.47
Balance at the beginning of the period at Dec. 31, 2019	$ 69,407	7,747	64,746	187	(6,314)	(272)	(51)		3,364	(66)
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Balance at the beginning of the period at Dec. 31, 2019	$ 69,407	7,747	64,746	187	(6,314)	(272)	(51)		3,364	(66)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation				25
Options exercised			18	(19)
Change in reciprocal interest				66			22
Repurchase of noncontrolling interest				0					0
Other				6
Earnings attributable to controlling interests	1,492				1,492
Preference share dividends					(284)
Dividends paid to reciprocal shareholder					14
Common share dividends declared					(3,281)
Other					(3)	0			(1)
Other comprehensive income/(loss) attributable to common shareholders, net of tax						1,171
Earnings attributable to noncontrolling interests									25
Change in unrealized loss on cash flow hedges									(3)
Foreign currency translation adjustments									57
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax									54
Comprehensive income/(loss) attributable to noncontrolling interests	(79)								79
Contributions									21
Distributions									(232)
Redemption of preferred shares held by subsidiary									0
Balance at the end of the period at Sep. 30, 2020	$ 68,435	7,747	64,764	265	(8,442)	899	(29)	65,204	3,231
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 2.430
Earnings per common share attributable to common shareholders (in Canadian dollars per share)	0.60
Diluted earnings per common share attributable to common shareholders (in Canadian dollars per share)	$ 0.60
Balance at the beginning of the period at Jun. 30, 2020		7,747	64,763	207	(7,797)	1,753	(47)		3,315	$ 0
Increase (Decrease) in Stockholders' Equity
Stock-based compensation				6
Options exercised			1	(1)
Change in reciprocal interest				54			18
Repurchase of noncontrolling interest				0					0
Other				(1)
Earnings attributable to controlling interests	$ 1,084				1,084
Preference share dividends					(94)
Dividends paid to reciprocal shareholder					4
Common share dividends declared					(1,640)
Other					1	0			(1)
Other comprehensive income/(loss) attributable to common shareholders, net of tax						(854)
Earnings attributable to noncontrolling interests									20
Change in unrealized loss on cash flow hedges									0
Foreign currency translation adjustments									(36)
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax									(36)
Comprehensive income/(loss) attributable to noncontrolling interests	16								(16)
Contributions									1
Distributions									(68)
Redemption of preferred shares held by subsidiary									0
Balance at the end of the period at Sep. 30, 2020	$ 68,435	$ 7,747	$ 64,764	$ 265	$ (8,442)	$ 899	$ (29)	$ 65,204	$ 3,231
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.810
Earnings per common share attributable to common shareholders (in Canadian dollars per share)	0.49
Diluted earnings per common share attributable to common shareholders (in Canadian dollars per share)	$ 0.49

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - CAD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities
Earnings	$ 1,517	$ 4,913
Adjustments to reconcile earnings to net cash provided by operating activities:
Depreciation and amortization	2,766	2,526
Deferred income tax (recovery)/expense	(82)	983
Changes in unrealized (gain)/loss on derivative instruments, net	200	(1,005)
Earnings from equity investments	(805)	(1,159)
Distributions from equity investments	1,145	1,442
Impairment of equity investments	2,351	0
Impairment of long-lived assets	0	105
Other	222	51
Changes in operating assets and liabilities	213	(451)
Net cash provided by operating activities	7,527	7,405
Investing activities
Capital expenditures	(3,790)	(3,928)
Long-term investments and restricted long-term investments	(413)	(1,018)
Distributions from equity investments in excess of cumulative earnings	438	285
Additions to intangible assets	(154)	(136)
Proceeds from dispositions	265	0
Loans to affiliates, net	10	(232)
Net cash used in investing activities	(3,644)	(5,029)
Financing activities
Net change in short-term borrowings	71	245
Net change in commercial paper and credit facility draws	231	3,365
Debenture and term note issues, net of issue costs	4,834	2,553
Debenture and term note repayments	(3,517)	(2,994)
Contributions from noncontrolling interests	21	10
Distributions to noncontrolling interests	(232)	(194)
Common shares issued	3	18
Preference share dividends	(284)	(287)
Common share dividends	(4,920)	(4,480)
Redemption of preferred shares held by subsidiary	0	(300)
Other	(52)	(60)
Net cash used in financing activities	(3,845)	(2,124)
Effect of translation of foreign denominated cash and cash equivalents and restricted cash	(22)	(17)
Net increase in cash and cash equivalents and restricted cash	16	235
Cash and cash equivalents and restricted cash at beginning of period	676	637
Cash and cash equivalents and restricted cash at end of period	$ 692	$ 872

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL POSITION - CAD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 657	$ 648
Restricted cash	35	28
Accounts receivable and other	4,333	6,781
Accounts receivable from affiliates	31	69
Inventory	1,368	1,299
Total current assets	6,424	8,825
Property, plant and equipment, net	95,990	93,723
Long-term investments	14,513	16,528
Restricted long-term investments	527	434
Deferred amounts and other assets	8,089	7,433
Intangible assets, net	2,122	2,173
Goodwill	33,832	33,153
Deferred income taxes	991	1,000
Total assets	162,488	163,269
Current liabilities
Short-term borrowings	969	898
Accounts payable and other	6,381	10,063
Accounts payable to affiliates	4	21
Interest payable	628	624
Current portion of long-term debt	3,616	4,404
Total current liabilities	11,598	16,010
Long-term debt	62,967	59,661
Other long-term liabilities	9,253	8,324
Deferred income taxes	10,235	9,867
Total liabilities	94,053	93,862
Contingencies
Share capital
Preference shares	7,747	7,747
Common shares (2,025 outstanding at September 30, 2020 and December 31, 2019)	64,764	64,746
Additional paid-in capital	265	187
Deficit	(8,442)	(6,314)
Accumulated other comprehensive income/(loss)	899	(272)
Reciprocal shareholding	(29)	(51)
Total Enbridge Inc. shareholders’ equity	65,204	66,043
Noncontrolling interests	3,231	3,364
Total equity	68,435	69,407
Total liabilities and equity	$ 162,488	$ 163,269

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - shares shares in Millions	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common shares, outstanding (in shares)	2,025	2,025

BASIS OF PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The accompanying unaudited interim consolidated financial statements of Enbridge Inc. ("we", "our", "us" and "Enbridge") have been prepared in accordance with generally accepted accounting principles in the United States of America (U.S. GAAP) and Regulation S-X for interim consolidated financial information. They do not include all of the information and notes required by U.S. GAAP for annual consolidated financial statements and should therefore be read in conjunction with our audited consolidated financial statements and notes for the year ended December 31, 2019. In the opinion of management, the interim consolidated financial statements contain all normal recurring adjustments necessary to present fairly our financial position, results of operations and cash flows for the interim periods reported. These interim consolidated financial statements follow the same significant accounting policies as those included in our audited consolidated financial statements for the year ended December 31, 2019, except for the adoption of new standards (Note 2) . Amounts are stated in Canadian dollars unless otherwise noted. Our operations and earnings for interim periods can be affected by seasonal fluctuations within the gas distribution utility businesses, as well as other factors such as the supply of and demand for crude oil and natural gas, and may not be indicative of annual results.

CHANGES IN ACCOUNTING POLICIES

CHANGES IN ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
CHANGES IN ACCOUNTING POLICIES	CHANGES IN ACCOUNTING POLICIES ADOPTION OF NEW ACCOUNTING STANDARDS Reference Rate Reform Effective July 1, 2020, we adopted Accounting Standards Update (ASU) 2020-04 on a prospective basis. The new standard was issued in March 2020 to provide temporary optional guidance in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying generally accepted accounting principles when accounting for contract modifications, hedging relationships and other transactions impacted by rate reform, subject to meeting certain criteria. ASU 2020-04 is effective until December 31, 2022. The adoption of this ASU did not have a material impact on our consolidated financial statements. Clarifying Interaction between Collaborative Arrangements and Revenue from Contracts with Customers Effective January 1, 2020, we adopted ASU 2018-18 on a retrospective basis. The new standard was issued in November 2018 to provide clarity on when transactions between entities in a collaborative arrangement should be accounted for under the new revenue standard, Accounting Standards Codification (ASC) 606. In determining whether transactions in collaborative arrangements should be accounted for under the revenue standard, the update specifies that entities shall apply unit of account guidance to identify distinct goods or services and whether such goods and services are separately identifiable from other promises in the contract. ASU 2018-18 also precludes entities from presenting transactions with a collaborative partner which are not in scope of the new revenue standard together with revenue from contracts with customers. The adoption of this ASU did not have a material impact on our consolidated financial statements. Disclosure Effectiveness Effective January 1, 2020, we adopted ASU 2018-13 on both a retrospective and prospective basis depending on the change. The new standard was issued to improve the disclosure requirements for fair value measurements by eliminating and modifying some disclosures, while also adding new disclosures. The adoption of this ASU did not have a material impact on our consolidated financial statements. Accounting for Credit Losses Effective January 1, 2020, we adopted ASU 2016-13 on a modified retrospective basis. The new standard was issued in June 2016 with the intent of providing financial statement users with more useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The previous accounting treatment used the incurred loss methodology for recognizing credit losses that delayed the recognition until it was probable a loss had been incurred. The accounting update adds a new impairment model, known as the current expected credit loss model, which is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of expected credit losses, which the Financial Accounting Standards Board believes results in more timely recognition of such losses. Further, ASU 2018-19 was issued in November 2018 to clarify that operating lease receivables should be accounted for under the new leases standard, ASC 842, and are not within the scope of ASC 326, Financial Instruments - Credit Losses. For accounts receivable, a loss allowance matrix is utilized to measure lifetime expected credit losses. The matrix contemplates historical credit losses by age of receivables, adjusted for any forward-looking information and management expectations. Other loan receivables and off-balance sheet commitments in scope of the new standard utilize a discounted cash flow methodology which calculates the current expected credit losses based on historical default probability rates associated with the credit rating of the counterparty and the related term of the loan or commitment, adjusted for forward-looking information and management expectations. On January 1, 2020, we recorded $66 million of additional Deficit on our Statements of Financial Position in connection with the adoption of ASU 2016-13 FUTURE ACCOUNTING POLICY CHANGES Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity ASU 2020-06 was issued in August 2020 to simplify accounting for certain financial instruments. The ASU eliminates the current models that require separation of beneficial conversion and cash conversion features from convertible instruments and simplifies the derivative scope exception guidance pertaining to equity classification of contracts in an entity’s own equity. The ASU also introduces additional disclosures for convertible debt and freestanding instruments that are indexed to and settled in an entity’s own equity. The ASU amends the diluted earnings per share guidance, including the requirement to use if-converted method for all convertible instruments and an update for instruments that can be settled in either cash or shares. ASU 2020-06 is effective January 1, 2022 and should be applied on a full or modified retrospective basis, with early adoption permitted on January 1, 2021. We are currently assessing the impact of the new standard on our consolidated financial statements. Clarifying Interaction between Equity Securities, Equity Method Investments and Derivatives ASU 2020-01 was issued in January 2020 and clarifies that observable transactions should be considered for the purpose of applying the measurement alternative in accordance with ASC 321 immediately before the application or upon discontinuance of the equity method of accounting. Furthermore, the ASU clarifies that forward contracts or purchased options on equity securities are not out of scope of ASC 815 guidance only because, upon the contracts’ exercise, the equity securities could be accounted for under the equity method of accounting or fair value option. ASU 2020-01 is effective January 1, 2021, with early adoption permitted, and is applied prospectively. The adoption of ASU 2020-01 is not expected to have a material impact on our consolidated financial statements. Accounting for Income Taxes ASU 2019-12 was issued in December 2019 with the intent of simplifying the accounting for income taxes. The accounting update removes certain exceptions to the general principles in ASC 740 as well as provides simplification by clarifying and amending existing guidance. ASU 2019-12 is effective January 1, 2021, and entities are permitted to adopt the standard early. We are currently assessing the impact of the new standard on our consolidated financial statements. Disclosure Effectiveness ASU 2018-14 was issued in August 2018 to improve disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendment modifies the current guidance by adding and removing several disclosure requirements while also clarifying the guidance on current disclosure requirements. ASU 2018-14 is effective January 1, 2021, and entities are permitted to adopt the standard early. The adoption of ASU 2018-14 is not expected to have a material impact on our consolidated financial statements.

REVENUES

REVENUES	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
REVENUES	REVENUES REVENUE FROM CONTRACTS WITH CUSTOMERS Major Products and Services Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Three months ended (millions of Canadian dollars) Transportation revenues 2,234 1,077 128 — — — 3,439 Storage and other revenues 22 64 51 — — — 137 Gas gathering and processing revenues — 7 — — — — 7 Gas distribution revenue — — 448 — — — 448 Electricity and transmission revenues — — — 46 — — 46 Total revenue from contracts with customers 2,256 1,148 627 46 — — 4,077 Commodity sales — — — — 4,595 — 4,595 Other revenues 1,2 360 14 (8) 80 (3) (5) 438 Intersegment revenues 157 — 2 — 4 (163) — Total revenues 2,773 1,162 621 126 4,596 (168) 9,110 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Three months ended (millions of Canadian dollars) Transportation revenues 2,305 1,073 135 — — — 3,513 Storage and other revenues 31 69 48 — — — 148 Gas gathering and processing revenues — 98 — — — — 98 Gas distribution revenues — — 470 — — — 470 Electricity and transmission revenues — — — 46 — — 46 Total revenue from contracts with customers 2,336 1,240 653 46 — — 4,275 Commodity sales — — — — 7,396 — 7,396 Other revenues 1,2 (156) 23 (21) 82 (1) — (73) Intersegment revenues 88 1 3 — 8 (100) — Total revenues 2,268 1,264 635 128 7,403 (100) 11,598 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Nine months ended (millions of Canadian dollars) Transportation revenues 6,815 3,458 494 — — — 10,767 Storage and other revenues 72 209 154 — — — 435 Gas gathering and processing revenues — 19 — — — — 19 Gas distribution revenue — — 2,551 — — — 2,551 Electricity and transmission revenues — — — 150 — — 150 Total revenue from contracts with customers 6,887 3,686 3,199 150 — — 13,922 Commodity sales — — — — 14,920 — 14,920 Other revenues 1,2 (59) 35 (1) 279 1 (18) 237 Intersegment revenues 424 1 8 — 22 (455) — Total revenues 7,252 3,722 3,206 429 14,943 (473) 29,079 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Nine months ended (millions of Canadian dollars) Transportation revenues 6,749 3,323 555 — — — 10,627 Storage and other revenues 83 168 154 — — — 405 Gas gathering and processing revenues — 329 — — — — 329 Gas distribution revenues — — 3,080 — — — 3,080 Electricity and transmission revenues — — — 139 — — 139 Commodity sales — 3 — — — — 3 Total revenue from contracts with customers 6,832 3,823 3,789 139 — — 14,583 Commodity sales — — — — 22,441 — 22,441 Other revenues 1,2 383 43 5 278 (2) (14) 693 Intersegment revenues 280 4 9 — 55 (348) — Total revenues 7,495 3,870 3,803 417 22,494 (362) 37,717 1 Includes mark-to-market gains/(losses) from our hedging program for the three months ended September 30, 2020 and 2019 of $276 million gain and $236 million loss, respectively, and for the nine months ended September 30, 2020 and 2019 of $298 million loss and $148 million gain, respectively. 2 Includes revenues from lease contracts for the three months ended September 30, 2020 and 2019 of $144 million and $143 million, respectively, and for the nine months ended September 30, 2020 and 2019 of $459 million and $458 million, respectively. We disaggregate revenues into categories which represent our principal performance obligations within each business segment because these revenue categories represent the most significant revenue streams in each segment and consequently are considered to be the most relevant revenue information for management to consider in evaluating performance. Contract Balances Receivables Contract Assets Contract Liabilities (millions of Canadian dollars) Balance as at December 31, 2019 2,099 216 1,424 Balance as at September 30, 2020 1,499 236 1,691 Contract receivables represent the amount of receivables derived from contracts with customers. Contract assets represent the amount of revenues which has been recognized in advance of payments received for performance obligations we have fulfilled (or partially fulfilled) and prior to the point in time at which our right to payment is unconditional. Amounts included in contract assets are transferred to accounts receivable when our right to receive the consideration becomes unconditional. Contract liabilities represent payments received for performance obligations which have not been fulfilled. Contract liabilities primarily relate to make-up rights and deferred revenues. Revenue recognized during the three and nine months ended September 30, 2020 included in contract liabilities at the beginning of the period was $22 million and $129 million, respectively. Increases in contract liabilities from cash received, net of amounts recognized as revenues during the three and nine months ended September 30, 2020 were $189 million and $369 million, respectively. Performance Obligations There were no material revenues recognized in the three and nine months ended September 30, 2020 from performance obligations satisfied in previous periods. Revenues to be Recognized from Unfulfilled Performance Obligations Total revenues from performance obligations expected to be fulfilled in future periods is $63.0 billion, of which $1.8 billion and $6.6 billion is expected to be recognized during the three months ending December 31, 2020 and the year ending December 31, 2021, respectively. The revenues excluded from the amounts above based on optional exemptions available under ASC 606, as explained below, represent a significant portion of our overall revenues and revenue from contracts with customers. Certain revenues such as flow-through operating costs charged to shippers are recognized at the amount for which we have the right to invoice our customers and are excluded from the amounts for revenues to be recognized in the future from unfulfilled performance obligations above. Variable consideration is excluded from the amounts above due to the uncertainty of the associated consideration, which is generally resolved when actual volumes and prices are determined. For example, we consider interruptible transportation service revenues to be variable revenues since volumes cannot be estimated. Additionally, the effect of escalation on certain tolls which are contractually escalated for inflation has not been reflected in the amounts above as it is not possible to reliably estimate future inflation rates. Revenues for periods extending beyond the current rate settlement term for regulated contracts where the tolls are periodically reset by the regulator are excluded from the amounts above since future tolls remain unknown. Finally, revenue from contracts with customers which have an original expected duration of one year or less are excluded from the amounts above. Recognition and Measurement of Revenues Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Consolidated Three months ended (millions of Canadian dollars) Revenues from products transferred at a point in time — — 15 — — 15 Revenues from products and services transferred over time 1 2,256 1,148 612 46 — 4,062 Total revenue from contracts with customers 2,256 1,148 627 46 — 4,077 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Consolidated Three months ended (millions of Canadian dollars) Revenues from products transferred at a point in time — — 17 — — 17 Revenues from products and services transferred over time 1 2,336 1,240 636 46 — 4,258 Total revenue from contracts with customers 2,336 1,240 653 46 — 4,275 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Consolidated Nine months ended (millions of Canadian dollars) Revenues from products transferred at a point in time — — 45 — — 45 Revenues from products and services transferred over time 1 6,887 3,686 3,154 150 — 13,877 Total revenue from contracts with customers 6,887 3,686 3,199 150 — 13,922 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Consolidated Nine months ended (millions of Canadian dollars) Revenues from products transferred at a point in time — 3 51 — — 54 Revenues from products and services transferred over time 1 6,832 3,820 3,738 139 — 14,529 Total revenue from contracts with customers 6,832 3,823 3,789 139 — 14,583

SEGMENTED INFORMATION

SEGMENTED INFORMATION	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
SEGMENTED INFORMATION	SEGMENTED INFORMATION Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Three months ended (millions of Canadian dollars) Revenues 2,773 1,162 621 126 4,596 (168) 9,110 Commodity and gas distribution costs (5) — (87) — (4,613) 179 (4,526) Operating and administrative (811) (432) (243) (57) (15) 4 (1,554) Income/(loss) from equity investments 118 191 (13) 22 (3) — 315 Impairment of equity investments — (615) — — — — (615) Other income 15 28 20 2 1 192 258 Earnings/(loss) before interest, income taxes, and depreciation and amortization 2,090 334 298 93 (34) 207 2,988 Depreciation and amortization (935) Interest expense (718) Income tax expense (231) Earnings 1,104 Capital expenditures 1 442 642 339 11 1 22 1,457 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Three months ended (millions of Canadian dollars) Revenues 2,268 1,264 635 128 7,403 (100) 11,598 Commodity and gas distribution costs (12) — (132) — (7,287) 111 (7,320) Operating and administrative (815) (550) (267) (55) (19) (35) (1,741) Impairment of long-lived assets — (105) — — — — (105) Income/(loss) from equity investments 205 135 (11) 5 — (1) 333 Other income/(expense) — 28 27 4 (6) (15) 38 Earnings/(loss) before interest, income taxes, and depreciation and amortization 1,646 772 252 82 91 (40) 2,803 Depreciation and amortization (844) Interest expense (644) Income tax expense (255) Earnings 1,060 Capital expenditures 1 442 436 247 2 — 32 1,159 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Nine months ended (millions of Canadian dollars) Revenues 7,252 3,722 3,206 429 14,943 (473) 29,079 Commodity and gas distribution costs (13) — (1,213) — (14,877) 451 (15,652) Operating and administrative (2,458) (1,377) (761) (144) (72) (143) (4,955) Income/(loss) from equity investments 463 284 2 59 (3) — 805 Impairment of equity investments — (2,351) — — — — (2,351) Other income/(expense) 36 (48) 51 32 (3) (333) (265) Earnings/(loss) before interest, income taxes, and depreciation and amortization 5,280 230 1,285 376 (12) (498) 6,661 Depreciation and amortization (2,766) Interest expense (2,105) Income tax expense (273) Earnings 1,517 Capital expenditures 1 1,503 1,462 765 41 2 63 3,836 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Nine months ended (millions of Canadian dollars) Revenues 7,495 3,870 3,803 417 22,494 (362) 37,717 Commodity and gas distribution costs (25) — (1,740) (2) (22,125) 359 (23,533) Operating and administrative (2,392) (1,626) (829) (137) (53) (24) (5,061) Impairment of long-lived assets — (105) — — — — (105) Income from equity investments 606 525 2 23 3 — 1,159 Other income/(expense) 26 69 68 (1) (1) 342 503 Earnings before interest, income taxes, and depreciation and amortization 5,710 2,733 1,304 300 318 315 10,680 Depreciation and amortization (2,526) Interest expense (1,966) Income tax expense (1,275) Earnings 4,913 Capital expenditures 1 1,984 1,254 643 18 2 71 3,972 1 Includes allowance for equity funds used during construction.

EARNINGS PER COMMON SHARE AND D

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE	EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE BASIC Earnings per common share is calculated by dividing earnings attributable to common shareholders by the weighted average number of common shares outstanding. The weighted average number of common shares outstanding has been reduced by our pro-rata weighted average interest in our own common shares of 5 million for the three and nine months ended September 30, 2020 and 6 million for the three and nine months ended September 30, 2019, resulting from our reciprocal investment in Noverco Inc. (Noverco). DILUTED The treasury stock method is used to determine the dilutive impact of stock options. This method assumes any proceeds from the exercise of stock options would be used to purchase common shares at the average market price during the period. Weighted average shares outstanding used to calculate basic and diluted earnings per share are as follows: Three months ended Nine months ended 2020 2019 2020 2019 (number of common shares in millions) Weighted average shares outstanding 2,021 2,018 2,020 2,017 Effect of dilutive options — 2 1 3 Diluted weighted average shares outstanding 2,021 2,020 2,021 2,020 For the three months ended September 30, 2020 and 2019, 34.1 million and 21.9 million, respectively, anti-dilutive stock options with a weighted average exercise price of $50.55 and $52.75, respectively, were excluded from the diluted earnings per common share calculation. For the nine months ended September 30, 2020 and 2019, 28.5 million and 17.9 million, respectively, anti-dilutive stock options with a weighted average exercise price of $51.85 and $53.48, respectively, were excluded from the diluted earnings per common share calculation. DIVIDENDS PER SHARE On November 3, 2020, our Board of Directors declared the following quarterly dividends. All dividends are payable on December 1, 2020 to shareholders of record on November 13, 2020. Dividend per share Common Shares 1 $0.81000 Preference Shares, Series A $0.34375 Preference Shares, Series B $0.21340 Preference Shares, Series C 2 $0.15975 Preference Shares, Series D $0.27875 Preference Shares, Series F $0.29306 Preference Shares, Series H $0.27350 Preference Shares, Series J US$0.30540 Preference Shares, Series L US$0.30993 Preference Shares, Series N $0.31788 Preference Shares, Series P $0.27369 Preference Shares, Series R $0.25456 Preference Shares, Series 1 US$0.37182 Preference Shares, Series 3 $0.23356 Preference Shares, Series 5 US$0.33596 Preference Shares, Series 7 $0.27806 Preference Shares, Series 9 $0.25606 Preference Shares, Series 11 3 $0.24613 Preference Shares, Series 13 4 $0.19019 Preference Shares, Series 15 5 $0.18644 Preference Shares, Series 17 $0.32188 Preference Shares, Series 19 $0.30625 1 The quarterly dividend per common share was increased 9.8% to $0.81 from $0.738, effective March 1, 2020. 2 The quarterly dividend per share paid on Series C was increased to $0.25458 from $0.25305 on March 1, 2020, was decreased to $0.16779 from $0.25458 on June 1, 2020 and was decreased to $0.15975 from $0.16779 on September 1, 2020, due to reset on a quarterly basis following the date of issuance of the Series C Preference Shares. 3 The quarterly dividend per share paid on Series 11 was decreased to $0.24613 from $0.275 on March 1, 2020, due to the reset of the annual dividend on March 1, 2020, and every five years thereafter. 4 The quarterly dividend per share paid on Series 13 was decreased to $0.19019 from $0.275 on June 1, 2020, due to the reset of the annual dividend on June 1, 2020, and every five years thereafter. 5 The quarterly dividend per share paid on Series 15 was decreased to $0.18644 from $0.275 on September 1, 2020, due to the reset of the annual dividend on September 1, 2020, and every five years thereafter.

AQUISITIONS AND DISPOSITIONS

AQUISITIONS AND DISPOSITIONS	9 Months Ended
	Sep. 30, 2020
Discontinued Operations and Disposal Groups [Abstract]
AQUISITIONS AND DISPOSITIONS	ACQUISITIONS AND DISPOSITIONS Line 10 Crude Oil Pipeline In the first quarter of 2018, we satisfied the condition as set out in our agreements for the sale of our Line 10 crude oil pipeline (Line 10), which originates near Hamilton, Ontario and terminates at West Seneca, New York. Our subsidiaries, Enbridge Pipelines Inc. and Enbridge Energy Partners, L.P. (EEP), owned the Canadian and United States portions of Line 10, respectively, and the related assets were included in our Liquids Pipelines segment. The transaction closed on June 1, 2020. No gain or loss on disposition was recorded. Montana-Alberta Tie Line In the fourth quarter of 2019, we committed to a plan to sell the Montana-Alberta Tie Line (MATL) transmission assets, a 345 kilometer transmission line from Great Falls, Montana to Lethbridge, Alberta. Its related assets were included in our Renewable Power Generation segment. The purchase and sale agreement was signed in January 2020. On May 1, 2020 we closed the sale of MATL for cash proceeds of approximately $189 million. After closing adjustments, a gain on disposal of $4 million was included in Other income/(expense) in the Consolidated Statements of Earnings for the nine months ended September 30, 2020. Ozark Gas Transmission In the first quarter of 2020, we agreed to sell our Ozark Gas Transmission and Ozark Gas Gathering assets (Ozark assets). The Ozark assets are composed of a 590 kilometer transmission system that extends from southeastern Oklahoma through Arkansas to southeastern Missouri, and a fee-based 330 mile gathering system that accesses Fayetteville Shale and Arkoma production. These assets were included in our Gas Transmission and Midstream segment. On April 1, 2020 we closed the sale of the Ozark assets for cash proceeds of approximately $63 million (US$45 million). After closing adjustments, a gain on disposal of $1 million (US$1 million) was included in Other income/(expense) in the Consolidated Statements of Earnings for the nine months ended September 30, 2020.

DEBT

DEBT	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
DEBT	DEBT CREDIT FACILITIES The following table provides details of our committed credit facilities as at September 30, 2020: Maturity Total Draws 1 Available (millions of Canadian dollars) Enbridge Inc. 2021-2024 11,980 6,420 5,560 Enbridge (U.S.) Inc. 2022-2024 7,347 995 6,352 Enbridge Pipelines Inc. 2022 2 3,000 1,938 1,062 Enbridge Gas Inc. 2022 2 2,000 969 1,031 Total committed credit facilities 24,327 10,322 14,005 1 Includes facility draws and commercial paper issuances that are back-stopped by credit facility. 2 Maturity date is inclusive of the one-year term out option. On February 24, 2020, Enbridge Inc. entered into a two year, non-revolving credit facility for US$1.0 billion with a syndicate of lenders. On February 25, 2020, Enbridge Inc. entered into two, one year, non-revolving, bilateral credit facilities for a total of US$500 million. On March 31, 2020, Enbridge Inc. entered into a one year, revolving, syndicated credit facility for $1.7 billion. On April 9, 2020, Enbridge Inc. exercised an accordion provision and increased the facility to $3.0 billion. On July 23 and 24, 2020, we extended approximately $10.0 billion of our 364 day extendible credit facilities to July 2022, inclusive of a one-year term out provision. In addition to the committed credit facilities noted above, we maintain $861 million of uncommitted demand credit facilities, of which $524 million were unutilized as at September 30, 2020. As at December 31, 2019, we had $916 million of uncommitted credit facilities, of which $476 million were unutilized. Our credit facilities carry a weighted average standby fee of 0.3% per annum on the unused portion and draws bear interest at market rates. Certain credit facilities serve as a back-stop to the commercial paper programs and we have the option to extend such facilities, which are currently scheduled to mature from 2021 to 2024. As at September 30, 2020 and December 31, 2019, commercial paper and credit facility draws, net of short-term borrowings and non-revolving credit facilities that mature within one year, of $8.7 billion and $9.0 billion, respectively, were supported by the availability of long-term committed credit facilities and therefore have been classified as long-term debt. LONG-TERM DEBT ISSUANCES During the nine months ended September 30, 2020, we completed the following long-term debt issuances totaling $2.5 billion and US$1.8 billion: Company Issue Date Principal Amount (millions of Canadian dollars, unless otherwise stated) Enbridge Inc. February 2020 Floating rate notes US$750 May 2020 3.20% medium-term notes $750 May 2020 2.44% medium-term notes $550 July 2020 Fixed-to-fixed subordinated term notes US$1,000 Enbridge Gas Inc. April 2020 2.90% medium-term notes $600 April 2020 3.65% medium-term notes $600 On October 1, 2020, Texas Eastern Transmission, LP (Texas Eastern), a wholly-owned operating subsidiary of Spectra Energy Partners, LP (SEP) issued US$300 million of 3.10% 20-year senior notes payable semi-annually in arrears and redeemed US$300 million of 4.13% senior notes due December 1, 2020. The newly issued notes mature on October 1, 2040. LONG-TERM DEBT REPAYMENTS During the nine months ended September 30, 2020, we completed the following long-term debt repayments totaling $1.2 billion and US$1.7 billion: Company Repayment Date Principal Amount (millions of Canadian dollars, unless otherwise stated) Enbridge Inc. January 2020 Floating rate notes US$700 March 2020 4.53% medium-term notes $500 June 2020 Floating rate notes US$500 Enbridge Pipelines (Southern Lights) L.L.C. June 2020 3.98% senior notes US$26 Enbridge Pipelines Inc. April 2020 4.45% medium-term notes $350 Enbridge Southern Lights LP June 2020 4.01% senior notes $7 Spectra Energy Partners, LP January 2020 6.09% senior secured notes US$111 June 2020 Floating rate notes US$400 Westcoast Energy Inc. January 2020 9.90% debentures $100 July 2020 4.57% medium-term notes $250 SUBORDINATED TERM NOTES As at September 30, 2020 and December 31, 2019, our fixed-to-floating and fixed-to-fixed subordinated term notes had a principal value of $8.0 billion and $6.6 billion, respectively. FAIR VALUE ADJUSTMENT As at September 30, 2020, the net fair value adjustment for total debt assumed in the acquisition of Spectra Energy was $783 million. During the three and nine months ended September 30, 2020, the amortization of the fair value adjustment, recorded as a reduction to Interest expense in the Consolidated Statements of Earnings, was $13 million and $42 million, respectively. DEBT COVENANTS

COMPONENTS OF ACCUMULATED OTHER

COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME	9 Months Ended
	Sep. 30, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME	COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME Changes in Accumulated Other Comprehensive Income (AOCI) attributable to our common shareholders for the nine months ended September 30, 2020 and 2019 are as follows: Cash Flow Excluded Components of Fair Value Hedges Net Cumulative Equity Pension and Total (millions of Canadian dollars) Balance as at January 1, 2020 (1,073) — (317) 1,396 67 (345) (272) Other comprehensive income/(loss) retained in AOCI (696) 7 (228) 1,760 8 — 851 Other comprehensive (income)/loss reclassified to earnings Interest rate contracts 1 179 — — — — — 179 Commodity contracts 2 (1) — — — — — (1) Foreign exchange contracts 3 3 — — — — — 3 Other contracts 4 (1) — — — — — (1) Amortization of pension and other postretirement benefits (OPEB) actuarial loss and prior service costs 5 — — — — — 13 13 (516) 7 (228) 1,760 8 13 1,044 Tax impact Income tax on amounts retained in AOCI 167 — 7 — (2) — 172 Income tax on amounts reclassified to earnings (42) — — — — (3) (45) 125 — 7 — (2) (3) 127 Balance as at September 30, 2020 (1,464) 7 (538) 3,156 73 (335) 899 Cash Flow Net Cumulative Equity Pension and Total (millions of Canadian dollars) Balance as at January 1, 2019 (770) (598) 4,323 34 (317) 2,672 Other comprehensive income/(loss) retained in AOCI (845) 167 (1,831) 26 — (2,483) Other comprehensive (income)/loss reclassified to earnings Interest rate contracts 1 108 — — — — 108 Foreign exchange contracts 3 4 — — — — 4 Other contracts 4 (4) — — — — (4) Amortization of pension and OPEB actuarial loss and prior service costs 5 — — — — 59 59 (737) 167 (1,831) 26 59 (2,316) Tax impact Income tax on amounts retained in AOCI 254 (20) — (7) — 227 Income tax on amounts reclassified to earnings (34) — — — (15) (49) 220 (20) — (7) (15) 178 Other — — — (7) 55 48 Balance as at September 30, 2019 (1,287) (451) 2,492 46 (218) 582 1 Reported within Interest expense in the Consolidated Statements of Earnings. 2 Reported within Transportation and other services revenue, Commodity sales revenues, Commodity costs and Operating and administrative expense in the Consolidated Statements of Earnings. 3 Reported within Transportation and other services revenues and Net foreign currency gain/(loss) in the Consolidated Statements of Earnings. 4 Reported within Operating and administrative expense in the Consolidated Statements of Earnings.

IMPAIRMENT OF EQUITY INVESTMENT

IMPAIRMENT OF EQUITY INVESTMENTS	9 Months Ended
	Sep. 30, 2020
Noncontrolling Interest [Abstract]
IMPAIRMENT OF EQUITY INVESTMENTS	IMPAIRMENT OF EQUITY INVESTMENTS Steckman Ridge, LP Steckman Ridge, LP (Steckman) is engaged in the storage of natural gas, is owned 50% by Enbridge, and is recorded as an equity method investment. During the quarter, Steckman’s forecasted performance was adjusted for the expectation that future available capacity will be re-contracted at lower than expected rates and an other than temporary impairment loss on our investment of $221 million for the three and nine months ended September 30, 2020 was recorded based on a discounted cash flow analysis. The carrying value of this investment as at September 30, 2020 and December 31, 2019 was $96 million and $222 million, respectively. Southeast Supply Header, L.L.C. Southeast Supply Header, L.L.C. (SESH) provides natural gas transmission services from east Texas and northern Louisiana to the southeast markets of the Gulf Coast. SESH is owned 50% by Enbridge and is recorded as an equity method investment. The forecasted performance of SESH was revised this quarter to reflect downward revisions to future negotiated rates as well as higher than expected available capacity levels, caused primarily by a significant contract expiry. An other than temporary impairment loss on our investment of $394 million for the three and nine months ended September 30, 2020 was recorded based on a discounted cash flow analysis. The carrying value of this investment as at September 30, 2020 and December 31, 2019 was $87 million and $484 million, respectively. DCP Midstream, LLC DCP Midstream, LLC (DCP Midstream), a 50% owned equity method investment of Enbridge, holds an equity interest in DCP Midstream, LP. A decline in the market price of DCP Midstream, LP’s publicly traded units during the first quarter of 2020 resulted in an other than temporary impairment loss on our investment in DCP Midstream of nil and $1.7 billion for the three and nine months ended September 30, 2020, respectively. In addition, we incurred losses of $324 million through our equity earnings pick up in relation to asset and goodwill impairment losses recorded by DCP Midstream, LP. The carrying value of our investment in DCP Midstream as at September 30, 2020 and December 31, 2019 was $340 million and $2.2 billion, respectively.

RISK MANAGEMENT AND FINANCIAL I

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS	RISK MANAGEMENT AND FINANCIAL INSTRUMENTS MARKET RISK Our earnings, cash flows and Other Comprehensive Income (OCI) are subject to movements in foreign exchange rates, interest rates, commodity prices and our share price (collectively, market risks). Formal risk management policies, processes and systems have been designed to mitigate these risks. The following summarizes the types of market risks to which we are exposed and the risk management instruments used to mitigate them. We use a combination of qualifying and non-qualifying derivative instruments to manage the risks noted below. Foreign Exchange Risk We generate certain revenues, incur expenses, and hold a number of investments and subsidiaries that are denominated in currencies other than Canadian dollars. As a result, our earnings, cash flows and OCI are exposed to fluctuations resulting from foreign exchange rate variability. We employ financial derivative instruments to hedge foreign currency denominated earnings exposure. A combination of qualifying cash flow, fair value and non-qualifying derivative instruments is used to hedge anticipated foreign currency denominated revenues and expenses, and to manage variability in cash flows. We hedge certain net investments in United States dollar denominated investments and subsidiaries using foreign currency derivatives and United States dollar denominated debt. Interest Rate Risk Our earnings and cash flows are exposed to short-term interest rate variability due to the regular repricing of our variable rate debt, primarily commercial paper. We monitor our debt portfolio mix of fixed and variable rate debt instruments to manage a consolidated portfolio of floating rate debt within the Board of Directors approved policy limit of a maximum of 30% of floating rate debt as a percentage of total debt outstanding. We primarily use qualifying derivative instruments to manage interest rate risk. Pay fixed-receive floating interest rate swaps may be used to hedge against the effect of future interest rate movements. We have implemented a program to significantly mitigate the impact of short-term interest rate volatility on interest expense via execution of floating to fixed interest rate swaps with an average swap rate of 3.0%. We are exposed to changes in the fair value of fixed rate debt that arise as a result of the changes in market interest rates. Pay floating-receive fixed interest rate swaps are used, when applicable, to hedge against future changes to the fair value of fixed rate debt which mitigates the impact of fluctuations in the fair value of fixed rate debt via execution of fixed to floating interest rate swaps. As at September 30, 2020, we do not have any pay floating-receive fixed interest rate swaps outstanding. Our earnings and cash flows are also exposed to variability in longer term interest rates ahead of anticipated fixed rate term debt issuances. Forward starting interest rate swaps are used to hedge against the effect of future interest rate movements. We have established a program within some of our subsidiaries to mitigate our exposure to long-term interest rate variability on select forecast term debt issuances via execution of floating to fixed interest rate swaps with an average swap rate of 2.3%. Commodity Price Risk Our earnings and cash flows are exposed to changes in commodity prices as a result of our ownership interests in certain assets and investments, as well as through the activities of our energy services subsidiaries. These commodities include natural gas, crude oil, power and NGL. We employ financial and physical derivative instruments to fix a portion of the variable price exposures that arise from physical transactions involving these commodities. We use primarily non-qualifying derivative instruments to manage commodity price risk. Equity Price Risk Equity price risk is the risk of earnings fluctuations due to changes in our share price. We have exposure to our own common share price through the issuance of various forms of stock-based compensation, which affect earnings through revaluation of the outstanding units every period. We use equity derivatives to manage the earnings volatility derived from one form of stock-based compensation, restricted share units. We use a combination of qualifying and non-qualifying derivative instruments to manage equity price risk. COVID-19 PANDEMIC RISK The spread of the COVID-19 pandemic has caused significant volatility in Canada, the United States and international markets. While we have taken proactive measures to deliver energy safely and reliably during this pandemic, given the ongoing dynamic nature of the circumstances surrounding COVID-19, the impact of this pandemic on our business remains uncertain. TOTAL DERIVATIVE INSTRUMENTS We generally have a policy of entering into individual International Swaps and Derivatives Association, Inc. agreements, or other similar derivative agreements, with the majority of our financial derivative counterparties. These agreements provide for the net settlement of derivative instruments outstanding with specific counterparties in the event of bankruptcy or other significant credit events, and reduce our credit risk exposure on financial derivative asset positions outstanding with the counterparties in those circumstances. The following table summarizes the maximum potential settlement amounts in the event of these specific circumstances. All amounts are presented gross in the Consolidated Statements of Financial Position. September 30, 2020 Derivative Derivative Derivative Instruments Used as Fair Value Hedges Non- Total Gross Amounts Total Net (millions of Canadian dollars) Accounts receivable and other Foreign exchange contracts — — 4 52 56 (23) 33 Commodity contracts 1 — — 158 159 (82) 77 1 — 4 210 215 1 (105) 110 Deferred amounts and other assets Foreign exchange contracts 19 — 23 184 226 (111) 115 Interest rate contracts 8 — — — 8 (3) 5 Commodity contracts 2 — — 64 66 (29) 37 29 — 23 248 300 (143) 157 Accounts payable and other Foreign exchange contracts (5) — (2) (376) (383) 23 (360) Interest rate contracts (167) — — (5) (172) — (172) Commodity contracts — — — (160) (160) 82 (78) Other contracts — — — (2) (2) — (2) (172) — (2) (543) (717) 2 105 (612) Other long-term liabilities Foreign exchange contracts — — — (1,140) (1,140) 111 (1,029) Interest rate contracts (566) — — (23) (589) 3 (586) Commodity contracts — — — (80) (80) 29 (51) Other contracts (4) — — (5) (9) — (9) (570) — — (1,248) (1,818) 143 (1,675) Total net derivative assets/(liabilities) Foreign exchange contracts 14 — 25 (1,280) (1,241) — (1,241) Interest rate contracts (725) — — (28) (753) — (753) Commodity contracts 3 — — (18) (15) — (15) Other contracts (4) — — (7) (11) — (11) (712) — 25 (1,333) (2,020) — (2,020) 1 As at September 30, 2020, $215 million was reported within Accounts receivable and other and nil within Accounts receivable from affiliates on the Consolidated Statements of Financial Position. 2 As at September 30, 2020, $716 million was reported within Accounts payable and other and $1 million within Accounts payable to affiliates on the Consolidated Statements of Financial Position. December 31, 2019 Derivative Derivative Non- Total Gross Amounts Total Net (millions of Canadian dollars) Accounts receivable and other Foreign exchange contracts — — 161 161 (78) 83 Commodity contracts — — 163 163 (47) 116 Other contracts 1 — 3 4 — 4 1 — 327 328 1 (125) 203 Deferred amounts and other assets Foreign exchange contracts 10 — 71 81 (42) 39 Commodity contracts — — 17 17 (2) 15 Other contracts 2 — 1 3 — 3 12 — 89 101 (44) 57 Accounts payable and other Foreign exchange contracts (5) (13) (392) (410) 78 (332) Interest rate contracts (353) — — (353) — (353) Commodity contracts — — (173) (173) 47 (126) (358) (13) (565) (936) 2 125 (811) Other long-term liabilities Foreign exchange contracts — — (934) (934) 42 (892) Interest rate contracts (181) — — (181) — (181) Commodity contracts (5) — (60) (65) 2 (63) (186) — (994) (1,180) 44 (1,136) Total net derivative assets/(liabilities) Foreign exchange contracts 5 (13) (1,094) (1,102) — (1,102) Interest rate contracts (534) — — (534) — (534) Commodity contracts (5) — (53) (58) — (58) Other contracts 3 — 4 7 — 7 (531) (13) (1,143) (1,687) — (1,687) 1 As at December 31, 2019, $327 million was reported within Accounts receivable and other and $1 million within Accounts receivable from affiliates on the Consolidated Statements of Financial Position. 2 As at December 31, 2019, $920 million was reported within Accounts payable and other and $16 million within Accounts payable to affiliates on the Consolidated Statements of Financial Position. The following table summarizes the maturity and notional principal or quantity outstanding related to our derivative instruments. September 30, 2020 2020 2021 2022 2023 2024 Thereafter Total Foreign exchange contracts - United States dollar forwards - purchase (millions of United States dollars) 1,117 500 1,750 — — — 3,367 Foreign exchange contracts - United States dollar forwards - sell (millions of United States dollars) 1,593 5,631 5,703 3,784 1,856 — 18,567 Foreign exchange contracts - British pound (GBP) forwards - sell (millions of GBP) 70 27 28 29 30 90 274 Foreign exchange contracts - Euro forwards - sell (millions of Euro) 23 94 94 92 91 514 908 Foreign exchange contracts - Japanese yen forwards - purchase (millions of yen) — — 72,500 — — — 72,500 Interest rate contracts - short-term pay fixed rate (millions of Canadian dollars) 1,265 4,129 407 48 35 121 6,005 Interest rate contracts - long-term debt pay fixed rate (millions of Canadian dollars) 508 1,584 2,035 1,368 — — 5,495 Equity contracts (millions of Canadian dollars) 19 44 7 11 — — 81 Commodity contracts - natural gas (billions of cubic feet) 3 25 60 31 18 10 10 154 Commodity contracts - crude oil (millions of barrels) 3 4 12 1 — — — 17 Commodity contracts - power (megawatt per hour) (MW/H) 65 (3) (43) (43) (43) (43) 1 (30) 2 1 Thereafter includes an average net purchase/(sale) of power of (43 ) MW/H for 2025. 2 Total is an average net purchase/(sale) of power. 3 Total is a net purchase/(sale) of underlying commodity. Fair Value Derivatives For foreign exchange derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk is included in Net foreign currency gain/(loss) in the Consolidated Statements of Earnings. Any excluded components are included in the Consolidated Statements of Comprehensive Income. Three months ended Nine months ended 2020 2019 2020 2019 (millions of Canadian dollars) Unrealized gain/(loss) on derivative (60) — 25 — Unrealized gain/(loss) on hedged item 59 — (6) — Realized loss on derivative — — (12) — The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income The following table presents the effect of cash flow hedges, fair value hedges and net investment hedges on our consolidated earnings and consolidated comprehensive income, before the effect of income taxes: Three months ended Nine months ended 2020 2019 2020 2019 (millions of Canadian dollars) Amount of unrealized gain/(loss) recognized in OCI Cash flow hedges Foreign exchange contracts — 2 6 (11) Interest rate contracts 41 (231) (709) (812) Commodity contracts (1) (1) 8 (22) Other contracts — 1 (6) 6 Fair value hedges Foreign exchange contracts (1) — 7 — Net investment hedges Foreign exchange contracts 17 (1) 13 1 56 (230) (681) (838) Amount of (gain)/loss reclassified from AOCI to earnings Foreign exchange contracts 1 1 2 3 4 Interest rate contracts 2 76 36 179 108 Commodity contracts (1) — (1) — Other contracts 3 (1) (1) (1) (4) 75 37 180 108 1 Reported within Transportation and other services revenues and Net foreign currency gain/(loss) in the Consolidated Statements of Earnings. 2 Reported within Interest expense in the Consolidated Statements of Earnings. 3 Reported within Operating and administrative expense in the Consolidated Statements of Earnings. We estimate that a loss of $99 million of AOCI related to unrealized cash flow hedges will be reclassified to earnings in the next 12 months. Actual amounts reclassified to earnings depend on the foreign exchange rates, interest rates and commodity prices in effect when derivative contracts that are currently outstanding mature. For all forecasted transactions, the maximum term over which we are hedging exposures to the variability of cash flows is 39 months as at September 30, 2020. Non-Qualifying Derivatives The following table presents the unrealized gains and losses associated with changes in the fair value of our non-qualifying derivatives: Three months ended Nine months ended 2020 2019 2020 2019 (millions of Canadian dollars) Foreign exchange contracts 1 571 (179) (186) 849 Interest rate contracts 2 (13) — (28) 178 Commodity contracts 3 69 73 25 (26) Other contracts 4 (3) (1) (11) 4 Total unrealized derivative fair value gain/(loss), net 624 (107) (200) 1,005 1 For the respective nine months ended periods, reported within Transportation and other services revenues (2020 - $87 million loss; 2019 - $366 million gain) and Net foreign currency gain/(loss) (2020 - $99 million loss; 2019 - $483 million gain) in the Consolidated Statements of Earnings. 2 Reported as an (increase)/decrease within Interest expense in the Consolidated Statements of Earnings. 3 For the respective nine months ended periods, reported within Transportation and other services revenues (2020 - $8 million gain; 2019 - $15 million loss), Commodity sales (2020 - $176 million loss; 2019 - $418 million loss), Commodity costs (2020 - $195 million gain; 2019 - $382 million gain) and Operating and administrative expense (2020 - $2 million loss; 2019 - $25 million gain) in the Consolidated Statements of Earnings. 4 Reported within Operating and administrative expense in the Consolidated Statements of Earnings. LIQUIDITY RISK Liquidity risk is the risk that we will not be able to meet our financial obligations, including commitments and guarantees, as they become due. In order to mitigate this risk, we forecast cash requirements over a 12-month rolling time period to determine whether sufficient funds will be available and maintain substantial capacity under our committed bank lines of credit to address any contingencies. Our primary sources of liquidity and capital resources are funds generated from operations, the issuance of commercial paper and draws under committed credit facilities and long-term debt, which includes debentures and medium-term notes. We also maintain current shelf prospectuses with securities regulators which enables ready access to either the Canadian or United States public capital markets, subject to market conditions. In addition, we maintain sufficient liquidity through committed credit facilities with a diversified group of banks and institutions which, if necessary, enables us to fund all anticipated requirements for approximately one year without accessing the capital markets. We are in compliance with all the terms and conditions of our committed credit facility agreements and term debt indentures as at September 30, 2020. As a result, all credit facilities are available to us and the banks are obligated to fund and have been funding us under the terms of the facilities. CREDIT RISK Entering into derivative instruments may result in exposure to credit risk from the possibility that a counterparty will default on its contractual obligations. In order to mitigate this risk, we enter into risk management transactions primarily with institutions that possess strong investment grade credit ratings. Credit risk relating to derivative counterparties is mitigated through maintenance and monitoring of credit exposure limits and contractual requirements, netting arrangements and ongoing monitoring of counterparty credit exposure using external credit rating services and other analytical tools. We have credit concentrations and credit exposure, with respect to derivative instruments, in the following counterparty segments: September 30, December 31, (millions of Canadian dollars) Canadian financial institutions 190 146 United States financial institutions 79 40 European financial institutions 25 3 Asian financial institutions 91 92 Other 1 114 113 499 394 1 Other is comprised of commodity clearing house and physical natural gas and crude oil counterparties. As at September 30, 2020, we provided letters of credit totaling nil in lieu of providing cash collateral to our counterparties pursuant to the terms of the relevant International Swaps and Derivatives Association agreements. We held no cash collateral on derivative asset exposures as at September 30, 2020 and December 31, 2019. Gross derivative balances have been presented without the effects of collateral posted. Derivative assets are adjusted for non-performance risk of our counterparties using their credit default swap spread rates, and are reflected at fair value. For derivative liabilities, our non-performance risk is considered in the valuation. Credit risk also arises from trade and other long-term receivables, and is mitigated through credit exposure limits and contractual requirements, assessment of credit ratings and netting arrangements. Within Enbridge Gas Inc. (Enbridge Gas), credit risk is mitigated by the utilities' large and diversified customer base and the ability to recover an estimate for doubtful accounts through the ratemaking process. We actively monitor the financial strength of large industrial customers, and in select cases, have obtained additional security to minimize the risk of default on receivables. Generally, we classify and provide for receivables older than 30 days as past due. The maximum exposure to credit risk related to non-derivative financial assets is their carrying value. FAIR VALUE MEASUREMENTS Our financial assets and liabilities measured at fair value on a recurring basis include derivative instruments. We also disclose the fair value of other financial instruments not measured at fair value. The fair value of financial instruments reflects our best estimates of market value based on generally accepted valuation techniques or models and is supported by observable market prices and rates. When such values are not available, we use discounted cash flow analysis from applicable yield curves based on observable market inputs to estimate fair value. FAIR VALUE OF FINANCIAL INSTRUMENTS We categorize our derivative instruments measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. Level 1 Level 1 includes derivatives measured at fair value based on unadjusted quoted prices for identical assets and liabilities in active markets that are accessible at the measurement date. An active market for a derivative is considered to be a market where transactions occur with sufficient frequency and volume to provide pricing information on an ongoing basis. Our Level 1 instruments consist primarily of exchange-traded derivatives used to mitigate the risk of crude oil price fluctuations. Level 2 Level 2 includes derivative valuations determined using directly or indirectly observable inputs other than quoted prices included within Level 1. Derivatives in this category are valued using models or other industry standard valuation techniques derived from observable market data. Such valuation techniques include inputs such as quoted forward prices, time value, volatility factors and broker quotes that can be observed or corroborated in the market for the entire duration of the derivative. Derivatives valued using Level 2 inputs include non-exchange traded derivatives such as over-the-counter foreign exchange forward and cross currency swap contracts, interest rate swaps, physical forward commodity contracts, as well as commodity swaps and options for which observable inputs can be obtained. We have also categorized the fair value of our held to maturity preferred share investment and long-term debt as Level 2. The fair value of our held to maturity preferred share investment is primarily based on the yield of certain Government of Canada bonds. The fair value of our long-term debt is based on quoted market prices for instruments of similar yield, credit risk and tenor. Level 3 Level 3 includes derivative valuations based on inputs which are less observable, unavailable or where the observable data does not support a significant portion of the derivatives’ fair value. Generally, Level 3 derivatives are longer dated transactions, occur in less active markets, occur at locations where pricing information is not available or have no binding broker quote to support Level 2 classification. We have developed methodologies, benchmarked against industry standards, to determine fair value for these derivatives based on extrapolation of observable future prices and rates. Derivatives valued using Level 3 inputs primarily include long-dated derivative power, crude, NGL and natural gas contracts, basis swaps, commodity swaps and energy swaps. We do not have any other financial instruments categorized in Level 3. We use the most observable inputs available to estimate the fair value of our derivatives. When possible, we estimate the fair value of our derivatives based on quoted market prices. If quoted market prices are not available, we use estimates from third party brokers. For non-exchange traded derivatives classified in Levels 2 and 3, we use standard valuation techniques to calculate the estimated fair value, including discounted cash flows for forwards and swaps. Depending on the type of derivative and nature of the underlying risk, we use observable market prices (interest, foreign exchange, commodity and share price) as primary inputs to these valuation techniques. Finally, we consider our own credit default swap spread as well as the credit default swap spreads associated with our counterparties in our estimation of fair value. We have categorized our derivative assets and liabilities measured at fair value as follows: September 30, 2020 Level 1 Level 2 Level 3 Total Gross (millions of Canadian dollars) Financial assets Current derivative assets Foreign exchange contracts — 56 — 56 Commodity contracts 16 47 96 159 16 103 96 215 Long-term derivative assets Foreign exchange contracts — 226 — 226 Interest rate contracts — 8 — 8 Commodity contracts 13 47 6 66 13 281 6 300 Financial liabilities Current derivative liabilities Foreign exchange contracts — (383) — (383) Interest rate contracts — (172) — (172) Commodity contracts (16) (28) (116) (160) Other contracts — (2) — (2) (16) (585) (116) (717) Long-term derivative liabilities Foreign exchange contracts — (1,140) — (1,140) Interest rate contracts — (589) — (589) Commodity contracts (11) (19) (50) (80) Other contracts — (9) — (9) (11) (1,757) (50) (1,818) Total net financial assets/(liabilities) Foreign exchange contracts — (1,241) — (1,241) Interest rate contracts — (753) — (753) Commodity contracts 2 47 (64) (15) Other contracts — (11) — (11) 2 (1,958) (64) (2,020) December 31, 2019 Level 1 Level 2 Level 3 Total Gross (millions of Canadian dollars) Financial assets Current derivative assets Foreign exchange contracts — 161 — 161 Interest rate contracts — 33 130 163 Commodity contracts — 4 — 4 — 198 130 328 Long-term derivative assets Foreign exchange contracts — 81 — 81 Commodity contracts — 12 5 17 Other contracts — 3 — 3 — 96 5 101 Financial liabilities Current derivative liabilities Foreign exchange contracts — (410) — (410) Interest rate contracts — (353) — (353) Commodity contracts (5) (23) (145) (173) (5) (786) (145) (936) Long-term derivative liabilities Foreign exchange contracts — (934) — (934) Interest rate contracts — (181) — (181) Commodity contracts — (6) (59) (65) — (1,121) (59) (1,180) Total net financial assets/(liabilities) Foreign exchange contracts — (1,102) — (1,102) Interest rate contracts — (534) — (534) Commodity contracts (5) 16 (69) (58) Other contracts — 7 — 7 (5) (1,613) (69) (1,687) The significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments were as follows: September 30, 2020 Fair Unobservable Minimum Maximum Weighted Unit of (fair value in millions of Canadian dollars) Commodity contracts - financial 1 Natural gas (5) Forward gas price 2.00 5.51 3.53 $/mmbtu 2 Crude 13 Forward crude price 24.11 54.70 39.72 $/barrel Power (49) Forward power price 21.76 65.93 53.79 $/MW/H Commodity contracts - physical 1 Natural gas 4 Forward gas price 1.04 6.77 3.52 $/mmbtu 2 Crude (29) Forward crude price 35.01 57.60 42.50 $/barrel NGL 2 Forward NGL price 0.26 1.32 0.61 $/gallon (64) 1 Financial and physical forward commodity contracts are valued using a market approach valuation technique. 2 One million British thermal units (mmbtu). If adjusted, the significant unobservable inputs disclosed in the table above would have a direct impact on the fair value of our Level 3 derivative instruments. The significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments include forward commodity prices. Changes in forward commodity prices could result in significantly different fair values for our Level 3 derivatives. Changes in net fair value of derivative assets and liabilities classified as Level 3 in the fair value hierarchy were as follows: Nine months ended 2020 2019 (millions of Canadian dollars) Level 3 net derivative liability at beginning of period (69) (11) Total gain/(loss) unrealized Included in earnings 1 (40) 67 Included in OCI 7 (22) Settlements 38 (98) Level 3 net derivative liability at end of period (64) (64) 1 Reported within Transportation and other services revenues, Commodity costs and Operating and administrative expense in the Consolidated Statements of Earnings. There were no transfers into or out of Level 3 as at September 30, 2020 or December 31, 2019. FAIR VALUE OF OTHER FINANCIAL INSTRUMENTS Certain long-term investments in other entities with no actively quoted prices are classified as Fair Value Measurement Alternative (FVMA) investments and are recorded at cost less impairment. The carrying value of FVMA investments totaled $56 million and $99 million as at September 30, 2020 and December 31, 2019, respectively. Two equity method investments, SESH and Steckman, are carried at their estimated fair values of $87 million and $96 million, respectively, at September 30, 2020 as a result of other than temporary impairment losses recorded during the current period (Note 9) . The fair values are determined based on a discounted cash flow model using inputs not observable in the market, and thus represent Level 3 measurements. We applied an 8% weighted average cost of capital and a long-term revenue growth rate of 0.5% to estimate the fair value of SESH, and a 9% weighted average cost of capital and a long-term revenue growth rate of 1% to estimate the fair value of Steckman. We have Restricted long-term investments held in trust totaling $527 million and $434 million as at September 30, 2020 and December 31, 2019, respectively, which are recognized at fair value. We have a held-to-maturity preferred share investment carried at its amortized cost of $566 million and $580 million as at September 30, 2020 and December 31, 2019, respectively. These preferred shares are entitled to a cumulative preferred dividend based on the yield of 10-year Government of Canada bonds plus a margin of 4.38%. The fair value of this preferred share investment is $566 million and $580 million as at September 30, 2020 and December 31, 2019, respectively. As at September 30, 2020 and December 31, 2019, our long-term debt had a carrying value of $66.9 billion and $64.4 billion, respectively, before debt issuance costs and a fair value of $74.1 billion and $70.5 billion, respectively. We have non-current notes receivable carried at book value and recorded in Deferred amounts and other assets in the Consolidated Statements of Financial Position. As at September 30, 2020 and December 31, 2019, the non-current notes receivable had a carrying value of $1.1 billion and $1.0 billion, respectively, which also approximates their fair value. The fair value of financial assets and liabilities other than derivative instruments, long-term investments, restricted long-term investments, long-term debt and non-current notes receivable described above approximate their carrying value due to the short period to maturity. NET INVESTMENT HEDGES We currently have designated a portion of our United States dollar denominated debt, as well as a portfolio of foreign exchange forward contracts in prior periods, as a hedge of our net investment in United States dollar denominated investments and subsidiaries.

INCOME TAXES

INCOME TAXES	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The effective income tax rates for the three months ended September 30, 2020 and 2019 were 17.3% and 19.4%, respectively and for the nine months ended September 30, 2020 and 2019 were 15.3% and 20.6%, respectively. The period-over-period change in the effective income tax rates is due to the effect of rate-regulated accounting for income taxes and the benefit of foreign rate differentials being partially offset by higher United States minimum tax relative to the change in earnings period-over-period.

PENSION AND OTHER POSTRETIREMEN

PENSION AND OTHER POSTRETIREMENT BENEFITS	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
PENSION AND OTHER POSTRETIREMENT BENEFITS	PENSION AND OTHER POSTRETIREMENT BENEFITS Three months ended Nine months ended 2020 2019 2020 2019 (millions of Canadian dollars) Service cost 50 50 150 152 Interest cost 44 51 131 152 Expected return on plan assets (90) (84) (270) (252) Amortization of actuarial loss and prior service costs 9 7 28 22 Net periodic benefit costs 13 24 39 74 During the nine months ended September 30, 2020, we incurred $236 million in severance costs related to our voluntary workforce reduction program. Severance costs are included in Operating and administrative expense in the Consolidated Statements of Earnings.

CONTINGENCIES

CONTINGENCIES	9 Months Ended
	Sep. 30, 2020
Loss Contingency [Abstract]
CONTINGENCIES	CONTINGENCIES We and our subsidiaries are involved in various legal and regulatory actions and proceedings which arise in the normal course of business, including interventions in regulatory proceedings and challenges to regulatory approvals and permits. While the final outcome of such actions and proceedings cannot be predicted with certainty, management believes that the resolution of such actions and proceedings will not have a material impact on our interim consolidated financial position or results of operations. TAX MATTERS We and our subsidiaries maintain tax liabilities related to uncertain tax positions. While fully supportable in our view, these tax positions, if challenged by tax authorities, may not be fully sustained on review.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS <Placeholder>

CHANGES IN ACCOUNTING POLICIES

CHANGES IN ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
ADOPTION OF NEW ACCOUNTING STANDARDS and FUTURE ACCOUNTING POLICY CHANGES	ADOPTION OF NEW ACCOUNTING STANDARDS Reference Rate Reform Effective July 1, 2020, we adopted Accounting Standards Update (ASU) 2020-04 on a prospective basis. The new standard was issued in March 2020 to provide temporary optional guidance in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying generally accepted accounting principles when accounting for contract modifications, hedging relationships and other transactions impacted by rate reform, subject to meeting certain criteria. ASU 2020-04 is effective until December 31, 2022. The adoption of this ASU did not have a material impact on our consolidated financial statements. Clarifying Interaction between Collaborative Arrangements and Revenue from Contracts with Customers Effective January 1, 2020, we adopted ASU 2018-18 on a retrospective basis. The new standard was issued in November 2018 to provide clarity on when transactions between entities in a collaborative arrangement should be accounted for under the new revenue standard, Accounting Standards Codification (ASC) 606. In determining whether transactions in collaborative arrangements should be accounted for under the revenue standard, the update specifies that entities shall apply unit of account guidance to identify distinct goods or services and whether such goods and services are separately identifiable from other promises in the contract. ASU 2018-18 also precludes entities from presenting transactions with a collaborative partner which are not in scope of the new revenue standard together with revenue from contracts with customers. The adoption of this ASU did not have a material impact on our consolidated financial statements. Disclosure Effectiveness Effective January 1, 2020, we adopted ASU 2018-13 on both a retrospective and prospective basis depending on the change. The new standard was issued to improve the disclosure requirements for fair value measurements by eliminating and modifying some disclosures, while also adding new disclosures. The adoption of this ASU did not have a material impact on our consolidated financial statements. Accounting for Credit Losses Effective January 1, 2020, we adopted ASU 2016-13 on a modified retrospective basis. The new standard was issued in June 2016 with the intent of providing financial statement users with more useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The previous accounting treatment used the incurred loss methodology for recognizing credit losses that delayed the recognition until it was probable a loss had been incurred. The accounting update adds a new impairment model, known as the current expected credit loss model, which is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of expected credit losses, which the Financial Accounting Standards Board believes results in more timely recognition of such losses. Further, ASU 2018-19 was issued in November 2018 to clarify that operating lease receivables should be accounted for under the new leases standard, ASC 842, and are not within the scope of ASC 326, Financial Instruments - Credit Losses. For accounts receivable, a loss allowance matrix is utilized to measure lifetime expected credit losses. The matrix contemplates historical credit losses by age of receivables, adjusted for any forward-looking information and management expectations. Other loan receivables and off-balance sheet commitments in scope of the new standard utilize a discounted cash flow methodology which calculates the current expected credit losses based on historical default probability rates associated with the credit rating of the counterparty and the related term of the loan or commitment, adjusted for forward-looking information and management expectations. On January 1, 2020, we recorded $66 million of additional Deficit on our Statements of Financial Position in connection with the adoption of ASU 2016-13 FUTURE ACCOUNTING POLICY CHANGES Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity ASU 2020-06 was issued in August 2020 to simplify accounting for certain financial instruments. The ASU eliminates the current models that require separation of beneficial conversion and cash conversion features from convertible instruments and simplifies the derivative scope exception guidance pertaining to equity classification of contracts in an entity’s own equity. The ASU also introduces additional disclosures for convertible debt and freestanding instruments that are indexed to and settled in an entity’s own equity. The ASU amends the diluted earnings per share guidance, including the requirement to use if-converted method for all convertible instruments and an update for instruments that can be settled in either cash or shares. ASU 2020-06 is effective January 1, 2022 and should be applied on a full or modified retrospective basis, with early adoption permitted on January 1, 2021. We are currently assessing the impact of the new standard on our consolidated financial statements. Clarifying Interaction between Equity Securities, Equity Method Investments and Derivatives ASU 2020-01 was issued in January 2020 and clarifies that observable transactions should be considered for the purpose of applying the measurement alternative in accordance with ASC 321 immediately before the application or upon discontinuance of the equity method of accounting. Furthermore, the ASU clarifies that forward contracts or purchased options on equity securities are not out of scope of ASC 815 guidance only because, upon the contracts’ exercise, the equity securities could be accounted for under the equity method of accounting or fair value option. ASU 2020-01 is effective January 1, 2021, with early adoption permitted, and is applied prospectively. The adoption of ASU 2020-01 is not expected to have a material impact on our consolidated financial statements. Accounting for Income Taxes ASU 2019-12 was issued in December 2019 with the intent of simplifying the accounting for income taxes. The accounting update removes certain exceptions to the general principles in ASC 740 as well as provides simplification by clarifying and amending existing guidance. ASU 2019-12 is effective January 1, 2021, and entities are permitted to adopt the standard early. We are currently assessing the impact of the new standard on our consolidated financial statements. Disclosure Effectiveness ASU 2018-14 was issued in August 2018 to improve disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendment modifies the current guidance by adding and removing several disclosure requirements while also clarifying the guidance on current disclosure requirements. ASU 2018-14 is effective January 1, 2021, and entities are permitted to adopt the standard early. The adoption of ASU 2018-14 is not expected to have a material impact on our consolidated financial statements.

REVENUES (Tables)

REVENUES (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of revenue	Major Products and Services Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Three months ended (millions of Canadian dollars) Transportation revenues 2,234 1,077 128 — — — 3,439 Storage and other revenues 22 64 51 — — — 137 Gas gathering and processing revenues — 7 — — — — 7 Gas distribution revenue — — 448 — — — 448 Electricity and transmission revenues — — — 46 — — 46 Total revenue from contracts with customers 2,256 1,148 627 46 — — 4,077 Commodity sales — — — — 4,595 — 4,595 Other revenues 1,2 360 14 (8) 80 (3) (5) 438 Intersegment revenues 157 — 2 — 4 (163) — Total revenues 2,773 1,162 621 126 4,596 (168) 9,110 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Three months ended (millions of Canadian dollars) Transportation revenues 2,305 1,073 135 — — — 3,513 Storage and other revenues 31 69 48 — — — 148 Gas gathering and processing revenues — 98 — — — — 98 Gas distribution revenues — — 470 — — — 470 Electricity and transmission revenues — — — 46 — — 46 Total revenue from contracts with customers 2,336 1,240 653 46 — — 4,275 Commodity sales — — — — 7,396 — 7,396 Other revenues 1,2 (156) 23 (21) 82 (1) — (73) Intersegment revenues 88 1 3 — 8 (100) — Total revenues 2,268 1,264 635 128 7,403 (100) 11,598 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Nine months ended (millions of Canadian dollars) Transportation revenues 6,815 3,458 494 — — — 10,767 Storage and other revenues 72 209 154 — — — 435 Gas gathering and processing revenues — 19 — — — — 19 Gas distribution revenue — — 2,551 — — — 2,551 Electricity and transmission revenues — — — 150 — — 150 Total revenue from contracts with customers 6,887 3,686 3,199 150 — — 13,922 Commodity sales — — — — 14,920 — 14,920 Other revenues 1,2 (59) 35 (1) 279 1 (18) 237 Intersegment revenues 424 1 8 — 22 (455) — Total revenues 7,252 3,722 3,206 429 14,943 (473) 29,079 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Nine months ended (millions of Canadian dollars) Transportation revenues 6,749 3,323 555 — — — 10,627 Storage and other revenues 83 168 154 — — — 405 Gas gathering and processing revenues — 329 — — — — 329 Gas distribution revenues — — 3,080 — — — 3,080 Electricity and transmission revenues — — — 139 — — 139 Commodity sales — 3 — — — — 3 Total revenue from contracts with customers 6,832 3,823 3,789 139 — — 14,583 Commodity sales — — — — 22,441 — 22,441 Other revenues 1,2 383 43 5 278 (2) (14) 693 Intersegment revenues 280 4 9 — 55 (348) — Total revenues 7,495 3,870 3,803 417 22,494 (362) 37,717 1 Includes mark-to-market gains/(losses) from our hedging program for the three months ended September 30, 2020 and 2019 of $276 million gain and $236 million loss, respectively, and for the nine months ended September 30, 2020 and 2019 of $298 million loss and $148 million gain, respectively. 2 Includes revenues from lease contracts for the three months ended September 30, 2020 and 2019 of $144 million and $143 million, respectively, and for the nine months ended September 30, 2020 and 2019 of $459 million and $458 million, respectively. Recognition and Measurement of Revenues Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Consolidated Three months ended (millions of Canadian dollars) Revenues from products transferred at a point in time — — 15 — — 15 Revenues from products and services transferred over time 1 2,256 1,148 612 46 — 4,062 Total revenue from contracts with customers 2,256 1,148 627 46 — 4,077 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Consolidated Three months ended (millions of Canadian dollars) Revenues from products transferred at a point in time — — 17 — — 17 Revenues from products and services transferred over time 1 2,336 1,240 636 46 — 4,258 Total revenue from contracts with customers 2,336 1,240 653 46 — 4,275 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Consolidated Nine months ended (millions of Canadian dollars) Revenues from products transferred at a point in time — — 45 — — 45 Revenues from products and services transferred over time 1 6,887 3,686 3,154 150 — 13,877 Total revenue from contracts with customers 6,887 3,686 3,199 150 — 13,922 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Consolidated Nine months ended (millions of Canadian dollars) Revenues from products transferred at a point in time — 3 51 — — 54 Revenues from products and services transferred over time 1 6,832 3,820 3,738 139 — 14,529 Total revenue from contracts with customers 6,832 3,823 3,789 139 — 14,583
Contract with customer, asset and liability	Contract Balances Receivables Contract Assets Contract Liabilities (millions of Canadian dollars) Balance as at December 31, 2019 2,099 216 1,424 Balance as at September 30, 2020 1,499 236 1,691

SEGMENTED INFORMATION (Tables)

SEGMENTED INFORMATION (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of reporting information by segment	Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Three months ended (millions of Canadian dollars) Revenues 2,773 1,162 621 126 4,596 (168) 9,110 Commodity and gas distribution costs (5) — (87) — (4,613) 179 (4,526) Operating and administrative (811) (432) (243) (57) (15) 4 (1,554) Income/(loss) from equity investments 118 191 (13) 22 (3) — 315 Impairment of equity investments — (615) — — — — (615) Other income 15 28 20 2 1 192 258 Earnings/(loss) before interest, income taxes, and depreciation and amortization 2,090 334 298 93 (34) 207 2,988 Depreciation and amortization (935) Interest expense (718) Income tax expense (231) Earnings 1,104 Capital expenditures 1 442 642 339 11 1 22 1,457 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Three months ended (millions of Canadian dollars) Revenues 2,268 1,264 635 128 7,403 (100) 11,598 Commodity and gas distribution costs (12) — (132) — (7,287) 111 (7,320) Operating and administrative (815) (550) (267) (55) (19) (35) (1,741) Impairment of long-lived assets — (105) — — — — (105) Income/(loss) from equity investments 205 135 (11) 5 — (1) 333 Other income/(expense) — 28 27 4 (6) (15) 38 Earnings/(loss) before interest, income taxes, and depreciation and amortization 1,646 772 252 82 91 (40) 2,803 Depreciation and amortization (844) Interest expense (644) Income tax expense (255) Earnings 1,060 Capital expenditures 1 442 436 247 2 — 32 1,159 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Nine months ended (millions of Canadian dollars) Revenues 7,252 3,722 3,206 429 14,943 (473) 29,079 Commodity and gas distribution costs (13) — (1,213) — (14,877) 451 (15,652) Operating and administrative (2,458) (1,377) (761) (144) (72) (143) (4,955) Income/(loss) from equity investments 463 284 2 59 (3) — 805 Impairment of equity investments — (2,351) — — — — (2,351) Other income/(expense) 36 (48) 51 32 (3) (333) (265) Earnings/(loss) before interest, income taxes, and depreciation and amortization 5,280 230 1,285 376 (12) (498) 6,661 Depreciation and amortization (2,766) Interest expense (2,105) Income tax expense (273) Earnings 1,517 Capital expenditures 1 1,503 1,462 765 41 2 63 3,836 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation Energy Services Eliminations and Other Consolidated Nine months ended (millions of Canadian dollars) Revenues 7,495 3,870 3,803 417 22,494 (362) 37,717 Commodity and gas distribution costs (25) — (1,740) (2) (22,125) 359 (23,533) Operating and administrative (2,392) (1,626) (829) (137) (53) (24) (5,061) Impairment of long-lived assets — (105) — — — — (105) Income from equity investments 606 525 2 23 3 — 1,159 Other income/(expense) 26 69 68 (1) (1) 342 503 Earnings before interest, income taxes, and depreciation and amortization 5,710 2,733 1,304 300 318 315 10,680 Depreciation and amortization (2,526) Interest expense (1,966) Income tax expense (1,275) Earnings 4,913 Capital expenditures 1 1,984 1,254 643 18 2 71 3,972 1 Includes allowance for equity funds used during construction.

EARNINGS PER COMMON SHARE AND_2

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of weighted average shares outstanding used to calculate basic and diluted earnings per common share	Weighted average shares outstanding used to calculate basic and diluted earnings per share are as follows: Three months ended Nine months ended 2020 2019 2020 2019 (number of common shares in millions) Weighted average shares outstanding 2,021 2,018 2,020 2,017 Effect of dilutive options — 2 1 3 Diluted weighted average shares outstanding 2,021 2,020 2,021 2,020
Schedule of preferred stock characteristics by class	On November 3, 2020, our Board of Directors declared the following quarterly dividends. All dividends are payable on December 1, 2020 to shareholders of record on November 13, 2020. Dividend per share Common Shares 1 $0.81000 Preference Shares, Series A $0.34375 Preference Shares, Series B $0.21340 Preference Shares, Series C 2 $0.15975 Preference Shares, Series D $0.27875 Preference Shares, Series F $0.29306 Preference Shares, Series H $0.27350 Preference Shares, Series J US$0.30540 Preference Shares, Series L US$0.30993 Preference Shares, Series N $0.31788 Preference Shares, Series P $0.27369 Preference Shares, Series R $0.25456 Preference Shares, Series 1 US$0.37182 Preference Shares, Series 3 $0.23356 Preference Shares, Series 5 US$0.33596 Preference Shares, Series 7 $0.27806 Preference Shares, Series 9 $0.25606 Preference Shares, Series 11 3 $0.24613 Preference Shares, Series 13 4 $0.19019 Preference Shares, Series 15 5 $0.18644 Preference Shares, Series 17 $0.32188 Preference Shares, Series 19 $0.30625 1 The quarterly dividend per common share was increased 9.8% to $0.81 from $0.738, effective March 1, 2020. 2 The quarterly dividend per share paid on Series C was increased to $0.25458 from $0.25305 on March 1, 2020, was decreased to $0.16779 from $0.25458 on June 1, 2020 and was decreased to $0.15975 from $0.16779 on September 1, 2020, due to reset on a quarterly basis following the date of issuance of the Series C Preference Shares. 3 The quarterly dividend per share paid on Series 11 was decreased to $0.24613 from $0.275 on March 1, 2020, due to the reset of the annual dividend on March 1, 2020, and every five years thereafter. 4 The quarterly dividend per share paid on Series 13 was decreased to $0.19019 from $0.275 on June 1, 2020, due to the reset of the annual dividend on June 1, 2020, and every five years thereafter. 5 The quarterly dividend per share paid on Series 15 was decreased to $0.18644 from $0.275 on September 1, 2020, due to the reset of the annual dividend on September 1, 2020, and every five years thereafter.

DEBT (Tables)

DEBT (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of credit facilities	The following table provides details of our committed credit facilities as at September 30, 2020: Maturity Total Draws 1 Available (millions of Canadian dollars) Enbridge Inc. 2021-2024 11,980 6,420 5,560 Enbridge (U.S.) Inc. 2022-2024 7,347 995 6,352 Enbridge Pipelines Inc. 2022 2 3,000 1,938 1,062 Enbridge Gas Inc. 2022 2 2,000 969 1,031 Total committed credit facilities 24,327 10,322 14,005 1 Includes facility draws and commercial paper issuances that are back-stopped by credit facility.
Schedule of long-term debt instruments	During the nine months ended September 30, 2020, we completed the following long-term debt issuances totaling $2.5 billion and US$1.8 billion: Company Issue Date Principal Amount (millions of Canadian dollars, unless otherwise stated) Enbridge Inc. February 2020 Floating rate notes US$750 May 2020 3.20% medium-term notes $750 May 2020 2.44% medium-term notes $550 July 2020 Fixed-to-fixed subordinated term notes US$1,000 Enbridge Gas Inc. April 2020 2.90% medium-term notes $600 April 2020 3.65% medium-term notes $600
Schedule of repayment of debt	During the nine months ended September 30, 2020, we completed the following long-term debt repayments totaling $1.2 billion and US$1.7 billion: Company Repayment Date Principal Amount (millions of Canadian dollars, unless otherwise stated) Enbridge Inc. January 2020 Floating rate notes US$700 March 2020 4.53% medium-term notes $500 June 2020 Floating rate notes US$500 Enbridge Pipelines (Southern Lights) L.L.C. June 2020 3.98% senior notes US$26 Enbridge Pipelines Inc. April 2020 4.45% medium-term notes $350 Enbridge Southern Lights LP June 2020 4.01% senior notes $7 Spectra Energy Partners, LP January 2020 6.09% senior secured notes US$111 June 2020 Floating rate notes US$400 Westcoast Energy Inc. January 2020 9.90% debentures $100 July 2020 4.57% medium-term notes $250

COMPONENTS OF ACCUMULATED OTH_2

COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	9 Months Ended
	Sep. 30, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Schedule of changes in AOCI attributable to Enbridge Inc. common shareholders	Changes in Accumulated Other Comprehensive Income (AOCI) attributable to our common shareholders for the nine months ended September 30, 2020 and 2019 are as follows: Cash Flow Excluded Components of Fair Value Hedges Net Cumulative Equity Pension and Total (millions of Canadian dollars) Balance as at January 1, 2020 (1,073) — (317) 1,396 67 (345) (272) Other comprehensive income/(loss) retained in AOCI (696) 7 (228) 1,760 8 — 851 Other comprehensive (income)/loss reclassified to earnings Interest rate contracts 1 179 — — — — — 179 Commodity contracts 2 (1) — — — — — (1) Foreign exchange contracts 3 3 — — — — — 3 Other contracts 4 (1) — — — — — (1) Amortization of pension and other postretirement benefits (OPEB) actuarial loss and prior service costs 5 — — — — — 13 13 (516) 7 (228) 1,760 8 13 1,044 Tax impact Income tax on amounts retained in AOCI 167 — 7 — (2) — 172 Income tax on amounts reclassified to earnings (42) — — — — (3) (45) 125 — 7 — (2) (3) 127 Balance as at September 30, 2020 (1,464) 7 (538) 3,156 73 (335) 899 Cash Flow Net Cumulative Equity Pension and Total (millions of Canadian dollars) Balance as at January 1, 2019 (770) (598) 4,323 34 (317) 2,672 Other comprehensive income/(loss) retained in AOCI (845) 167 (1,831) 26 — (2,483) Other comprehensive (income)/loss reclassified to earnings Interest rate contracts 1 108 — — — — 108 Foreign exchange contracts 3 4 — — — — 4 Other contracts 4 (4) — — — — (4) Amortization of pension and OPEB actuarial loss and prior service costs 5 — — — — 59 59 (737) 167 (1,831) 26 59 (2,316) Tax impact Income tax on amounts retained in AOCI 254 (20) — (7) — 227 Income tax on amounts reclassified to earnings (34) — — — (15) (49) 220 (20) — (7) (15) 178 Other — — — (7) 55 48 Balance as at September 30, 2019 (1,287) (451) 2,492 46 (218) 582 1 Reported within Interest expense in the Consolidated Statements of Earnings. 2 Reported within Transportation and other services revenue, Commodity sales revenues, Commodity costs and Operating and administrative expense in the Consolidated Statements of Earnings. 3 Reported within Transportation and other services revenues and Net foreign currency gain/(loss) in the Consolidated Statements of Earnings. 4 Reported within Operating and administrative expense in the Consolidated Statements of Earnings.

RISK MANAGEMENT AND FINANCIAL_2

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of the Consolidated Statements of Financial Position location and carrying value of derivative instruments	The following table summarizes the maximum potential settlement amounts in the event of these specific circumstances. All amounts are presented gross in the Consolidated Statements of Financial Position. September 30, 2020 Derivative Derivative Derivative Instruments Used as Fair Value Hedges Non- Total Gross Amounts Total Net (millions of Canadian dollars) Accounts receivable and other Foreign exchange contracts — — 4 52 56 (23) 33 Commodity contracts 1 — — 158 159 (82) 77 1 — 4 210 215 1 (105) 110 Deferred amounts and other assets Foreign exchange contracts 19 — 23 184 226 (111) 115 Interest rate contracts 8 — — — 8 (3) 5 Commodity contracts 2 — — 64 66 (29) 37 29 — 23 248 300 (143) 157 Accounts payable and other Foreign exchange contracts (5) — (2) (376) (383) 23 (360) Interest rate contracts (167) — — (5) (172) — (172) Commodity contracts — — — (160) (160) 82 (78) Other contracts — — — (2) (2) — (2) (172) — (2) (543) (717) 2 105 (612) Other long-term liabilities Foreign exchange contracts — — — (1,140) (1,140) 111 (1,029) Interest rate contracts (566) — — (23) (589) 3 (586) Commodity contracts — — — (80) (80) 29 (51) Other contracts (4) — — (5) (9) — (9) (570) — — (1,248) (1,818) 143 (1,675) Total net derivative assets/(liabilities) Foreign exchange contracts 14 — 25 (1,280) (1,241) — (1,241) Interest rate contracts (725) — — (28) (753) — (753) Commodity contracts 3 — — (18) (15) — (15) Other contracts (4) — — (7) (11) — (11) (712) — 25 (1,333) (2,020) — (2,020) 1 As at September 30, 2020, $215 million was reported within Accounts receivable and other and nil within Accounts receivable from affiliates on the Consolidated Statements of Financial Position. 2 As at September 30, 2020, $716 million was reported within Accounts payable and other and $1 million within Accounts payable to affiliates on the Consolidated Statements of Financial Position. December 31, 2019 Derivative Derivative Non- Total Gross Amounts Total Net (millions of Canadian dollars) Accounts receivable and other Foreign exchange contracts — — 161 161 (78) 83 Commodity contracts — — 163 163 (47) 116 Other contracts 1 — 3 4 — 4 1 — 327 328 1 (125) 203 Deferred amounts and other assets Foreign exchange contracts 10 — 71 81 (42) 39 Commodity contracts — — 17 17 (2) 15 Other contracts 2 — 1 3 — 3 12 — 89 101 (44) 57 Accounts payable and other Foreign exchange contracts (5) (13) (392) (410) 78 (332) Interest rate contracts (353) — — (353) — (353) Commodity contracts — — (173) (173) 47 (126) (358) (13) (565) (936) 2 125 (811) Other long-term liabilities Foreign exchange contracts — — (934) (934) 42 (892) Interest rate contracts (181) — — (181) — (181) Commodity contracts (5) — (60) (65) 2 (63) (186) — (994) (1,180) 44 (1,136) Total net derivative assets/(liabilities) Foreign exchange contracts 5 (13) (1,094) (1,102) — (1,102) Interest rate contracts (534) — — (534) — (534) Commodity contracts (5) — (53) (58) — (58) Other contracts 3 — 4 7 — 7 (531) (13) (1,143) (1,687) — (1,687) 1 As at December 31, 2019, $327 million was reported within Accounts receivable and other and $1 million within Accounts receivable from affiliates on the Consolidated Statements of Financial Position. 2 As at December 31, 2019, $920 million was reported within Accounts payable and other and $16 million within Accounts payable to affiliates on the Consolidated Statements of Financial Position.
Summary of the maturity and notional principal or quantity outstanding related to derivative instruments	The following table summarizes the maturity and notional principal or quantity outstanding related to our derivative instruments. September 30, 2020 2020 2021 2022 2023 2024 Thereafter Total Foreign exchange contracts - United States dollar forwards - purchase (millions of United States dollars) 1,117 500 1,750 — — — 3,367 Foreign exchange contracts - United States dollar forwards - sell (millions of United States dollars) 1,593 5,631 5,703 3,784 1,856 — 18,567 Foreign exchange contracts - British pound (GBP) forwards - sell (millions of GBP) 70 27 28 29 30 90 274 Foreign exchange contracts - Euro forwards - sell (millions of Euro) 23 94 94 92 91 514 908 Foreign exchange contracts - Japanese yen forwards - purchase (millions of yen) — — 72,500 — — — 72,500 Interest rate contracts - short-term pay fixed rate (millions of Canadian dollars) 1,265 4,129 407 48 35 121 6,005 Interest rate contracts - long-term debt pay fixed rate (millions of Canadian dollars) 508 1,584 2,035 1,368 — — 5,495 Equity contracts (millions of Canadian dollars) 19 44 7 11 — — 81 Commodity contracts - natural gas (billions of cubic feet) 3 25 60 31 18 10 10 154 Commodity contracts - crude oil (millions of barrels) 3 4 12 1 — — — 17 Commodity contracts - power (megawatt per hour) (MW/H) 65 (3) (43) (43) (43) (43) 1 (30) 2 1 Thereafter includes an average net purchase/(sale) of power of (43 ) MW/H for 2025. 2 Total is an average net purchase/(sale) of power. 3 Total is a net purchase/(sale) of underlying commodity.
Schedule of effect of cash flow hedges and net investment hedges on consolidated earnings and consolidated comprehensive income, before income taxes	For foreign exchange derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk is included in Net foreign currency gain/(loss) in the Consolidated Statements of Earnings. Any excluded components are included in the Consolidated Statements of Comprehensive Income. Three months ended Nine months ended 2020 2019 2020 2019 (millions of Canadian dollars) Unrealized gain/(loss) on derivative (60) — 25 — Unrealized gain/(loss) on hedged item 59 — (6) — Realized loss on derivative — — (12) — The following table presents the effect of cash flow hedges, fair value hedges and net investment hedges on our consolidated earnings and consolidated comprehensive income, before the effect of income taxes: Three months ended Nine months ended 2020 2019 2020 2019 (millions of Canadian dollars) Amount of unrealized gain/(loss) recognized in OCI Cash flow hedges Foreign exchange contracts — 2 6 (11) Interest rate contracts 41 (231) (709) (812) Commodity contracts (1) (1) 8 (22) Other contracts — 1 (6) 6 Fair value hedges Foreign exchange contracts (1) — 7 — Net investment hedges Foreign exchange contracts 17 (1) 13 1 56 (230) (681) (838) Amount of (gain)/loss reclassified from AOCI to earnings Foreign exchange contracts 1 1 2 3 4 Interest rate contracts 2 76 36 179 108 Commodity contracts (1) — (1) — Other contracts 3 (1) (1) (1) (4) 75 37 180 108 1 Reported within Transportation and other services revenues and Net foreign currency gain/(loss) in the Consolidated Statements of Earnings. 2 Reported within Interest expense in the Consolidated Statements of Earnings. 3 Reported within Operating and administrative expense in the Consolidated Statements of Earnings.
Schedule of unrealized gains and losses associated with changes in the fair value of non-qualifying derivatives	The following table presents the unrealized gains and losses associated with changes in the fair value of our non-qualifying derivatives: Three months ended Nine months ended 2020 2019 2020 2019 (millions of Canadian dollars) Foreign exchange contracts 1 571 (179) (186) 849 Interest rate contracts 2 (13) — (28) 178 Commodity contracts 3 69 73 25 (26) Other contracts 4 (3) (1) (11) 4 Total unrealized derivative fair value gain/(loss), net 624 (107) (200) 1,005 1 For the respective nine months ended periods, reported within Transportation and other services revenues (2020 - $87 million loss; 2019 - $366 million gain) and Net foreign currency gain/(loss) (2020 - $99 million loss; 2019 - $483 million gain) in the Consolidated Statements of Earnings. 2 Reported as an (increase)/decrease within Interest expense in the Consolidated Statements of Earnings. 3 For the respective nine months ended periods, reported within Transportation and other services revenues (2020 - $8 million gain; 2019 - $15 million loss), Commodity sales (2020 - $176 million loss; 2019 - $418 million loss), Commodity costs (2020 - $195 million gain; 2019 - $382 million gain) and Operating and administrative expense (2020 - $2 million loss; 2019 - $25 million gain) in the Consolidated Statements of Earnings. 4 Reported within Operating and administrative expense in the Consolidated Statements of Earnings.
Schedule of group credit concentrations and maximum credit exposure, with respect to derivative instruments	We have credit concentrations and credit exposure, with respect to derivative instruments, in the following counterparty segments: September 30, December 31, (millions of Canadian dollars) Canadian financial institutions 190 146 United States financial institutions 79 40 European financial institutions 25 3 Asian financial institutions 91 92 Other 1 114 113 499 394 1 Other is comprised of commodity clearing house and physical natural gas and crude oil counterparties.
Schedule of derivative assets and liabilities measured at fair value	We have categorized our derivative assets and liabilities measured at fair value as follows: September 30, 2020 Level 1 Level 2 Level 3 Total Gross (millions of Canadian dollars) Financial assets Current derivative assets Foreign exchange contracts — 56 — 56 Commodity contracts 16 47 96 159 16 103 96 215 Long-term derivative assets Foreign exchange contracts — 226 — 226 Interest rate contracts — 8 — 8 Commodity contracts 13 47 6 66 13 281 6 300 Financial liabilities Current derivative liabilities Foreign exchange contracts — (383) — (383) Interest rate contracts — (172) — (172) Commodity contracts (16) (28) (116) (160) Other contracts — (2) — (2) (16) (585) (116) (717) Long-term derivative liabilities Foreign exchange contracts — (1,140) — (1,140) Interest rate contracts — (589) — (589) Commodity contracts (11) (19) (50) (80) Other contracts — (9) — (9) (11) (1,757) (50) (1,818) Total net financial assets/(liabilities) Foreign exchange contracts — (1,241) — (1,241) Interest rate contracts — (753) — (753) Commodity contracts 2 47 (64) (15) Other contracts — (11) — (11) 2 (1,958) (64) (2,020) December 31, 2019 Level 1 Level 2 Level 3 Total Gross (millions of Canadian dollars) Financial assets Current derivative assets Foreign exchange contracts — 161 — 161 Interest rate contracts — 33 130 163 Commodity contracts — 4 — 4 — 198 130 328 Long-term derivative assets Foreign exchange contracts — 81 — 81 Commodity contracts — 12 5 17 Other contracts — 3 — 3 — 96 5 101 Financial liabilities Current derivative liabilities Foreign exchange contracts — (410) — (410) Interest rate contracts — (353) — (353) Commodity contracts (5) (23) (145) (173) (5) (786) (145) (936) Long-term derivative liabilities Foreign exchange contracts — (934) — (934) Interest rate contracts — (181) — (181) Commodity contracts — (6) (59) (65) — (1,121) (59) (1,180) Total net financial assets/(liabilities) Foreign exchange contracts — (1,102) — (1,102) Interest rate contracts — (534) — (534) Commodity contracts (5) 16 (69) (58) Other contracts — 7 — 7 (5) (1,613) (69) (1,687)
Schedule of significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments	The significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments were as follows: September 30, 2020 Fair Unobservable Minimum Maximum Weighted Unit of (fair value in millions of Canadian dollars) Commodity contracts - financial 1 Natural gas (5) Forward gas price 2.00 5.51 3.53 $/mmbtu 2 Crude 13 Forward crude price 24.11 54.70 39.72 $/barrel Power (49) Forward power price 21.76 65.93 53.79 $/MW/H Commodity contracts - physical 1 Natural gas 4 Forward gas price 1.04 6.77 3.52 $/mmbtu 2 Crude (29) Forward crude price 35.01 57.60 42.50 $/barrel NGL 2 Forward NGL price 0.26 1.32 0.61 $/gallon (64) 1 Financial and physical forward commodity contracts are valued using a market approach valuation technique. 2 One million British thermal units (mmbtu).
Schedule of changes in net fair value of derivative assets and liabilities classified as Level 3 in the fair value hierarchy	Changes in net fair value of derivative assets and liabilities classified as Level 3 in the fair value hierarchy were as follows: Nine months ended 2020 2019 (millions of Canadian dollars) Level 3 net derivative liability at beginning of period (69) (11) Total gain/(loss) unrealized Included in earnings 1 (40) 67 Included in OCI 7 (22) Settlements 38 (98) Level 3 net derivative liability at end of period (64) (64) 1 Reported within Transportation and other services revenues, Commodity costs and Operating and administrative expense in the Consolidated Statements of Earnings.

PENSION AND OTHER POSTRETIREM_2

PENSION AND OTHER POSTRETIREMENT BENEFITS (Tables)	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Schedule of net benefit costs recognized	Three months ended Nine months ended 2020 2019 2020 2019 (millions of Canadian dollars) Service cost 50 50 150 152 Interest cost 44 51 131 152 Expected return on plan assets (90) (84) (270) (252) Amortization of actuarial loss and prior service costs 9 7 28 22 Net periodic benefit costs 13 24 39 74

CHANGES IN ACCOUNTING POLICIE_2

CHANGES IN ACCOUNTING POLICIES - Narrative (Details) - CAD ($) $ in Millions	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional deficit on Statements of Financial Position		$ (69,407)	$ (68,435)		$ (72,676)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Retained earnings/(deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional deficit on Statements of Financial Position		$ 6,314	$ 8,442	$ 7,797	$ 3,932	$ 3,392	$ 5,538
Adjustment | Retained earnings/(deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional deficit on Statements of Financial Position		$ 66		$ 0
Adjustment | Retained earnings/(deficit) | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional deficit on Statements of Financial Position	$ 66

REVENUES - Disaggregation of Re

REVENUES - Disaggregation of Revenue (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 4,077	$ 4,275	$ 13,922	$ 14,583
Total revenues	9,110	11,598	29,079	37,717
Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	15	17	45	54
Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,062	4,258	13,877	14,529
Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	3,439	3,513	10,767	10,627
Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	137	148	435	405
Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	7	98	19	329
Gas distribution
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	448	470	2,551	3,080
Total revenues	440	454	2,550	3,085
Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	46	46	150	139
Commodity sales
Disaggregation of Revenue [Line Items]
Revenue from contract with customer				3
Revenue not from contract with customers	4,595	7,396	14,920	22,441
Total revenues	4,595	7,396	14,920	22,444
Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	438	(73)	237	693
Liquids Pipelines
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,256	2,336	6,887	6,832
Liquids Pipelines | Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Liquids Pipelines | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,256	2,336	6,887	6,832
Gas Transmission and Midstream
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,148	1,240	3,686	3,823
Gas Transmission and Midstream | Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	3
Gas Transmission and Midstream | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,148	1,240	3,686	3,820
Gas Distribution and Storage
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	627	653	3,199	3,789
Gas Distribution and Storage | Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	15	17	45	51
Gas Distribution and Storage | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	612	636	3,154	3,738
Renewable Power Generation and Transmission
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	46	46	150	139
Renewable Power Generation and Transmission | Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Renewable Power Generation and Transmission | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	46	46	150	139
Energy Services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Energy Services | Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Energy Services | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Liquids Pipelines
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,256	2,336	6,887	6,832
Total revenues	2,773	2,268	7,252	7,495
Business segments | Liquids Pipelines | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,234	2,305	6,815	6,749
Business segments | Liquids Pipelines | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	22	31	72	83
Business segments | Liquids Pipelines | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Liquids Pipelines | Gas distribution
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Liquids Pipelines | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Liquids Pipelines | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue from contract with customer				0
Revenue not from contract with customers	0	0	0	0
Business segments | Liquids Pipelines | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	360	(156)	(59)	383
Business segments | Gas Transmission and Midstream
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,148	1,240	3,686	3,823
Total revenues	1,162	1,264	3,722	3,870
Business segments | Gas Transmission and Midstream | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,077	1,073	3,458	3,323
Business segments | Gas Transmission and Midstream | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	64	69	209	168
Business segments | Gas Transmission and Midstream | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	7	98	19	329
Business segments | Gas Transmission and Midstream | Gas distribution
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Gas Transmission and Midstream | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Gas Transmission and Midstream | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue from contract with customer				3
Revenue not from contract with customers	0	0	0	0
Business segments | Gas Transmission and Midstream | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	14	23	35	43
Business segments | Gas Distribution and Storage
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	627	653	3,199	3,789
Total revenues	621	635	3,206	3,803
Business segments | Gas Distribution and Storage | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	128	135	494	555
Business segments | Gas Distribution and Storage | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	51	48	154	154
Business segments | Gas Distribution and Storage | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Gas Distribution and Storage | Gas distribution
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	448	470	2,551	3,080
Business segments | Gas Distribution and Storage | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Gas Distribution and Storage | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue from contract with customer				0
Revenue not from contract with customers	0	0	0	0
Business segments | Gas Distribution and Storage | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	(8)	(21)	(1)	5
Business segments | Renewable Power Generation and Transmission
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	46	46	150	139
Total revenues	126	128	429	417
Business segments | Renewable Power Generation and Transmission | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Renewable Power Generation and Transmission | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Renewable Power Generation and Transmission | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Renewable Power Generation and Transmission | Gas distribution
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Renewable Power Generation and Transmission | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	46	46	150	139
Business segments | Renewable Power Generation and Transmission | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue from contract with customer				0
Revenue not from contract with customers	0	0	0	0
Business segments | Renewable Power Generation and Transmission | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	80	82	279	278
Business segments | Energy Services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Total revenues	4,596	7,403	14,943	22,494
Business segments | Energy Services | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Energy Services | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Energy Services | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Energy Services | Gas distribution
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Energy Services | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Business segments | Energy Services | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue from contract with customer				0
Revenue not from contract with customers	4,595	7,396	14,920	22,441
Business segments | Energy Services | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	(3)	(1)	1	(2)
Eliminations and Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Total revenues	(168)	(100)	(473)	(362)
Eliminations and Other | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Eliminations and Other | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Eliminations and Other | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Eliminations and Other | Gas distribution
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Eliminations and Other | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Eliminations and Other | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue from contract with customer				0
Revenue not from contract with customers	0	0	0	0
Eliminations and Other | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	(5)	0	(18)	(14)
Intersegment revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	(163)	(100)	(455)	(348)
Total revenues	(168)	(100)	(473)	(362)
Intersegment revenues | Liquids Pipelines
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	157	88	424	280
Intersegment revenues | Gas Transmission and Midstream
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	1	1	4
Intersegment revenues | Gas Distribution and Storage
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	2	3	8	9
Intersegment revenues | Renewable Power Generation and Transmission
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	0	0	0
Intersegment revenues | Energy Services
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	$ 4	$ 8	$ 22	$ 55

REVENUES - Narrative (Details)

REVENUES - Narrative (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Mark-to-market gains (losses) from hedging program	$ 276	$ (236)	$ (298)	$ 148
Revenues from lease contracts	144	$ 143	459	$ 458
Revenue recognized	22		129
Increase (decrease) in contract with customers, liability	189		369
Remaining performance obligation	63,000		63,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 1,800		$ 1,800
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, period	3 months		3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 6,600		$ 6,600
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, period	1 year		1 year

REVENUES - Contract Balances (D

REVENUES - Contract Balances (Details) - CAD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Receivables	$ 1,499	$ 2,099
Contract Assets	236	216
Contract Liabilities	$ 1,691	$ 1,424

SEGMENTED INFORMATION (Details)

SEGMENTED INFORMATION (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segmented Information
Revenues	$ 9,110	$ 11,598	$ 29,079	$ 37,717
Commodity and gas distribution costs	(4,526)	(7,320)	(15,652)	(23,533)
Operating and administrative	(1,554)	(1,741)	(4,955)	(5,061)
Impairment of long-lived assets	0	(105)	0	(105)
Income/(loss) from equity investments	315	333	805	1,159
Impairment of equity investments	(615)	0	(2,351)	0
Other income/(expense)	258	38	(265)	503
Earnings/(loss) before interest, income taxes, and depreciation and amortization	2,988	2,803	6,661	10,680
Depreciation and amortization	(935)	(844)	(2,766)	(2,526)
Interest expense	(718)	(644)	(2,105)	(1,966)
Income tax expense	(231)	(255)	(273)	(1,275)
Earnings	1,104	1,060	1,517	4,913
Capital expenditures	1,457	1,159	3,836	3,972
Intersegment Eliminations
Segmented Information
Revenues	(168)	(100)	(473)	(362)
Commodity and gas distribution costs	179	111	451	359
Operating and administrative	4	(35)	(143)	(24)
Impairment of long-lived assets		0		0
Income/(loss) from equity investments	0	(1)	0	0
Impairment of equity investments	0		0
Other income/(expense)	192	(15)	(333)	342
Earnings/(loss) before interest, income taxes, and depreciation and amortization	207	(40)	(498)	315
Capital expenditures	22	32	63	71
Liquids Pipelines | Business segments
Segmented Information
Revenues	2,773	2,268	7,252	7,495
Commodity and gas distribution costs	(5)	(12)	(13)	(25)
Operating and administrative	(811)	(815)	(2,458)	(2,392)
Impairment of long-lived assets		0		0
Income/(loss) from equity investments	118	205	463	606
Impairment of equity investments	0		0
Other income/(expense)	15	0	36	26
Earnings/(loss) before interest, income taxes, and depreciation and amortization	2,090	1,646	5,280	5,710
Capital expenditures	442	442	1,503	1,984
Gas Transmission and Midstream | Business segments
Segmented Information
Revenues	1,162	1,264	3,722	3,870
Commodity and gas distribution costs	0	0	0	0
Operating and administrative	(432)	(550)	(1,377)	(1,626)
Impairment of long-lived assets		(105)		(105)
Income/(loss) from equity investments	191	135	284	525
Impairment of equity investments	(615)		(2,351)
Other income/(expense)	28	28	(48)	69
Earnings/(loss) before interest, income taxes, and depreciation and amortization	334	772	230	2,733
Capital expenditures	642	436	1,462	1,254
Gas Distribution and Storage | Business segments
Segmented Information
Revenues	621	635	3,206	3,803
Commodity and gas distribution costs	(87)	(132)	(1,213)	(1,740)
Operating and administrative	(243)	(267)	(761)	(829)
Impairment of long-lived assets		0		0
Income/(loss) from equity investments	(13)	(11)	2	2
Impairment of equity investments	0		0
Other income/(expense)	20	27	51	68
Earnings/(loss) before interest, income taxes, and depreciation and amortization	298	252	1,285	1,304
Capital expenditures	339	247	765	643
Renewable Power Generation and Transmission | Business segments
Segmented Information
Revenues	126	128	429	417
Commodity and gas distribution costs	0	0	0	(2)
Operating and administrative	(57)	(55)	(144)	(137)
Impairment of long-lived assets		0		0
Income/(loss) from equity investments	22	5	59	23
Impairment of equity investments	0		0
Other income/(expense)	2	4	32	(1)
Earnings/(loss) before interest, income taxes, and depreciation and amortization	93	82	376	300
Capital expenditures	11	2	41	18
Energy Services | Business segments
Segmented Information
Revenues	4,596	7,403	14,943	22,494
Commodity and gas distribution costs	(4,613)	(7,287)	(14,877)	(22,125)
Operating and administrative	(15)	(19)	(72)	(53)
Impairment of long-lived assets		0		0
Income/(loss) from equity investments	(3)	0	(3)	3
Impairment of equity investments	0		0
Other income/(expense)	1	(6)	(3)	(1)
Earnings/(loss) before interest, income taxes, and depreciation and amortization	(34)	91	(12)	318
Capital expenditures	$ 1	$ 0	$ 2	$ 2

EARNINGS PER COMMON SHARE AND_3

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Basic (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Prorata weighted average interest in entity's own common shares (in shares)	5	6	5	6

EARNINGS PER COMMON SHARE AND_4

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Diluted (Details) - $ / shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Weighted average number of common shares outstanding diluted
Weighted average common shares outstanding (in shares)	2,021	2,018	2,020	2,017
Effect of dilutive options (in shares)	0	2	1	3
Diluted weighted average common shares outstanding (in shares)	2,021	2,020	2,021	2,020
Stock options
Weighted average number of common shares outstanding diluted
Antidilutive securities excluded from the diluted earnings per common share calculation (in shares)	34.1	21.9	28.5	17.9
Weighted average exercise price of antidilutive securities (in Canadian dollars per share)	$ 50.55	$ 52.75	$ 51.85	$ 53.48

EARNINGS PER COMMON SHARE AND_5

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Dividends Per Share (Details)	Nov. 03, 2020$ / shares	Nov. 03, 2020$ / shares	Sep. 01, 2020$ / shares	Jun. 01, 2020$ / shares	Mar. 01, 2020$ / shares	Feb. 29, 2020$ / shares	Aug. 31, 2020$ / shares	May 31, 2020$ / shares
Dividends Payable [Line Items]
Common stock, dividends, per share, declared (in dollars per share)					$ 0.81	$ 0.738
Increase in quarterly dividend per common share (percent)					9.80%
Preferred share investment | Preference Shares, Series C
Dividends Payable [Line Items]
Dividend per share (in dollars per share)			$ 0.15975	$ 0.16779	$ 0.25458	0.25305	$ 0.16779	$ 0.25458
Preferred share investment | Preference Shares, Series 11
Dividends Payable [Line Items]
Dividend per share (in dollars per share)					$ 0.24613	$ 0.275
Preferred share investment | Preference Shares, Series 13
Dividends Payable [Line Items]
Dividend per share (in dollars per share)				$ 0.19019				$ 0.275
Preferred share investment | Preference Shares, Series 15
Dividends Payable [Line Items]
Dividend per share (in dollars per share)			$ 0.18644				$ 0.275
Subsequent event | Common shares
Dividends Payable [Line Items]
Common stock, dividends, per share, declared (in dollars per share)	$ 0.81000
Subsequent event | Preferred share investment | Preference Shares, Series A
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.34375
Subsequent event | Preferred share investment | Preference Shares, Series B
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.21340
Subsequent event | Preferred share investment | Preference Shares, Series C
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.15975
Subsequent event | Preferred share investment | Preference Shares, Series D
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.27875
Subsequent event | Preferred share investment | Preference Shares, Series F
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.29306
Subsequent event | Preferred share investment | Preference Shares, Series H
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.27350
Subsequent event | Preferred share investment | Preference Shares, Series J
Dividends Payable [Line Items]
Dividend per share (in dollars per share)		$ 0.30540
Subsequent event | Preferred share investment | Preference Shares, Series L
Dividends Payable [Line Items]
Dividend per share (in dollars per share)		0.30993
Subsequent event | Preferred share investment | Preference Shares, Series N
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.31788
Subsequent event | Preferred share investment | Preference Shares, Series P
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.27369
Subsequent event | Preferred share investment | Preference Shares, Series R
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.25456
Subsequent event | Preferred share investment | Preference Shares, Series 1
Dividends Payable [Line Items]
Dividend per share (in dollars per share)		0.37182
Subsequent event | Preferred share investment | Preference Shares, Series 3
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.23356
Subsequent event | Preferred share investment | Preference Shares, Series 5
Dividends Payable [Line Items]
Dividend per share (in dollars per share)		$ 0.33596
Subsequent event | Preferred share investment | Preference Shares, Series 7
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.27806
Subsequent event | Preferred share investment | Preference Shares, Series 9
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.25606
Subsequent event | Preferred share investment | Preference Shares, Series 11
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.24613
Subsequent event | Preferred share investment | Preference Shares, Series 13
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.19019
Subsequent event | Preferred share investment | Preference Shares, Series 15
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.18644
Subsequent event | Preferred share investment | Preference Shares, Series 17
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	0.32188
Subsequent event | Preferred share investment | Preference Shares, Series 19
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	$ 0.30625

AQUISITIONS AND DISPOSITIONS -

AQUISITIONS AND DISPOSITIONS - Narrative (Details) - Dispositions $ in Millions	Jun. 01, 2020CAD ($)	May 01, 2020CAD ($)	Apr. 01, 2020CAD ($)	Apr. 01, 2020USD ($)	Sep. 30, 2020CAD ($)	Sep. 30, 2020USD ($)
Line 10 Crude Oil Pipeline
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal	$ 0
Montana-Alberta Tie Line Transmission Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal					$ 4,000,000
Proceeds from dispositions		$ 189,000,000
Ozark assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal					$ 1,000,000	$ 1
Proceeds from dispositions			$ 63,000,000	$ 45

DEBT - Credit Facilities (Detai

DEBT - Credit Facilities (Details) - Committed credit facilities	Sep. 30, 2020CAD ($)
CREDIT FACILITIES
Total Facilities	$ 24,327,000,000
Draws	10,322,000,000
Available	14,005,000,000
Enbridge (U.S.) Inc.
CREDIT FACILITIES
Total Facilities	7,347,000,000
Draws	995,000,000
Available	6,352,000,000
Enbridge Pipelines Inc.
CREDIT FACILITIES
Total Facilities	3,000,000,000
Draws	1,938,000,000
Available	1,062,000,000
Enbridge Gas Inc.
CREDIT FACILITIES
Total Facilities	2,000,000,000
Draws	969,000,000
Available	1,031,000,000
Enbridge Inc.
CREDIT FACILITIES
Total Facilities	11,980,000,000
Draws	6,420,000,000
Available	$ 5,560,000,000

DEBT - Narrative (Details)

DEBT - Narrative (Details)	Oct. 01, 2020USD ($)	Jul. 24, 2020CAD ($)	Mar. 31, 2020CAD ($)	Feb. 25, 2020USD ($)credit_facility	Feb. 24, 2020USD ($)	Sep. 30, 2020CAD ($)	Sep. 30, 2020CAD ($)	Sep. 30, 2020USD ($)	Apr. 09, 2020CAD ($)	Dec. 31, 2019CAD ($)
Line of Credit Facility [Line Items]
Commitment fee percentage							30.00%
Long-term debt						$ 62,967,000,000	$ 62,967,000,000			$ 59,661,000,000
Principal amount of debt						2,500,000,000	2,500,000,000	$ 1,800,000,000
Long-term debt, fair value adjustment							783,000,000
Amortization of fair value adjustment						13,000,000	42,000,000
Commercial paper and credit facility draws
Line of Credit Facility [Line Items]
Long-term debt						8,700,000,000	8,700,000,000			9,000,000,000
Fixed-to-floating subordinated term notes | Subordinated term notes
Line of Credit Facility [Line Items]
Subordinated debt						8,000,000,000	8,000,000,000			8,000,000,000
Fixed-to-fixed subordinated term notes | Subordinated term notes
Line of Credit Facility [Line Items]
Subordinated debt						6,600,000,000	6,600,000,000			6,600,000,000
Committed credit facilities
Line of Credit Facility [Line Items]
Amount of credit facility						24,327,000,000	24,327,000,000
Unutilized amount of facility						14,005,000,000	14,005,000,000
Non-revolving credit facility
Line of Credit Facility [Line Items]
Amount of credit facility					$ 1,000,000,000
Term of debt instrument					2 years
Non-revolving, bilateral credit facility
Line of Credit Facility [Line Items]
Amount of credit facility				$ 500,000,000
Number of credit facilities | credit_facility				2
Term of debt instrument				1 year
Revolving credit facility
Line of Credit Facility [Line Items]
Amount of credit facility			$ 1,700,000,000						$ 3,000,000,000
Term of debt instrument			1 year
Revolving credit facility | Extendible Credit Facility
Line of Credit Facility [Line Items]
Term out provision		1 year
Term of debt instrument		364 days
Portion of credit facility extended		$ 10,000,000,000
Uncommitted demand credit facilities
Line of Credit Facility [Line Items]
Amount of credit facility						861,000,000	861,000,000			916,000,000
Unutilized amount of facility						524,000,000	$ 524,000,000			$ 476,000,000
Enbridge Pipelines Inc. | Committed credit facilities
Line of Credit Facility [Line Items]
Term out provision							1 year
Amount of credit facility						3,000,000,000	$ 3,000,000,000
Unutilized amount of facility						1,062,000,000	$ 1,062,000,000
Enbridge Gas Inc. | Committed credit facilities
Line of Credit Facility [Line Items]
Term out provision							1 year
Amount of credit facility						2,000,000,000	$ 2,000,000,000
Unutilized amount of facility						$ 1,031,000,000	$ 1,031,000,000
Spectra Energy Partners, LP | 3.10% 20-Year Senior Notes | Senior Notes | Subsequent event
Line of Credit Facility [Line Items]
Term of debt instrument	20 years
Principal amount of debt	$ 300,000,000
Interest rate (as a percent)	3.10%
Spectra Energy Partners, LP | 4.13% Senior Notes | Senior Notes | Subsequent event
Line of Credit Facility [Line Items]
Principal amount of debt	$ 300,000,000
Interest rate (as a percent)	4.13%

DEBT - Long Term Debt Issuance

DEBT - Long Term Debt Issuance (Details)	Sep. 30, 2020USD ($)	Sep. 30, 2020CAD ($)	Jul. 31, 2020USD ($)	May 31, 2020CAD ($)	Apr. 30, 2020CAD ($)	Feb. 29, 2020USD ($)
Debt Instrument [Line Items]
Principal Amount	$ 1,800,000,000	$ 2,500,000,000
Enbridge Inc. | Floating rate notes
Debt Instrument [Line Items]
Principal Amount						$ 750,000,000
Enbridge Inc. | 3.20% medium-term notes
Debt Instrument [Line Items]
Principal Amount				$ 750,000,000
Interest rate (as a percent)				3.20%
Enbridge Inc. | 2.44% medium-term notes
Debt Instrument [Line Items]
Principal Amount				$ 550,000,000
Interest rate (as a percent)				2.44%
Enbridge Inc. | Fixed-to-fixed subordinated term notes
Debt Instrument [Line Items]
Principal Amount			$ 1,000,000,000
Enbridge Gas Inc. | 2.90% medium-term notes
Debt Instrument [Line Items]
Principal Amount					$ 600,000,000
Interest rate (as a percent)					2.90%
Enbridge Gas Inc. | 3.65% medium-term notes
Debt Instrument [Line Items]
Principal Amount					$ 600,000,000
Interest rate (as a percent)					3.65%

DEBT - Long Term Debt Repayment

DEBT - Long Term Debt Repayments (Details) $ in Millions, $ in Millions	1 Months Ended							9 Months Ended
	Jul. 31, 2020CAD ($)	Jun. 30, 2020CAD ($)	Jun. 30, 2020USD ($)	Apr. 30, 2020CAD ($)	Mar. 31, 2020CAD ($)	Jan. 31, 2020CAD ($)	Jan. 31, 2020USD ($)	Sep. 30, 2020CAD ($)	Sep. 30, 2020USD ($)
DEBT
Principal Amount								$ 1,200	$ 1,700
Enbridge Pipelines (Southern Lights) L.L.C. | 3.98% senior notes
DEBT
Principal Amount			$ 26
Interest rate (as a percent)		3.98%	3.98%
Enbridge Pipelines Inc. | 4.45% medium-term notes
DEBT
Principal Amount				$ 350
Interest rate (as a percent)				4.45%
Enbridge Southern Lights LP | 4.01% senior notes
DEBT
Principal Amount		$ 7
Interest rate (as a percent)		4.01%	4.01%
Spectra Energy Partners, LP | 6.09% senior secured notes
DEBT
Principal Amount							$ 111
Interest rate (as a percent)						6.09%	6.09%
Spectra Energy Partners, LP | Floating rate notes
DEBT
Principal Amount			$ 400
Westcoast Energy Inc. | 9.90% debentures
DEBT
Principal Amount						$ 100
Interest rate (as a percent)						9.90%	9.90%
Westcoast Energy Inc. | 4.57% medium-term notes
DEBT
Principal Amount	$ 250
Interest rate (as a percent)	4.57%
Enbridge Inc. | Floating rate notes
DEBT
Principal Amount							$ 700
Enbridge Inc. | 4.53% medium-term notes
DEBT
Principal Amount					$ 500
Interest rate (as a percent)					4.53%
Enbridge Inc. | Floating rate notes
DEBT
Principal Amount			$ 500

COMPONENTS OF ACCUMULATED OTH_3

COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - CAD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Changes in AOCI
Balance at the beginning of the period	$ 69,407
Other comprehensive income/(loss) retained in AOCI	851	$ (2,483)
Other comprehensive (income)/loss reclassified to earnings	13	59
Total before tax impact	1,044	(2,316)
Income tax on amounts retained in AOCI	172	227
Income tax on amounts reclassified to earnings	(45)	(49)
Tax impact	127	178
Other		48
Balance at the end of the period	68,435	72,676
Interest rate contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	179	108
Commodity contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	(1)
Foreign exchange contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	3	4
Other contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	(1)	(4)
Total
Changes in AOCI
Balance at the beginning of the period	(272)	2,672
Balance at the end of the period	899	582
Cash Flow  Hedges
Changes in AOCI
Balance at the beginning of the period	(1,073)	(770)
Other comprehensive income/(loss) retained in AOCI	(696)	(845)
Total before tax impact	(516)	(737)
Income tax on amounts retained in AOCI	167	254
Income tax on amounts reclassified to earnings	(42)	(34)
Tax impact	125	220
Other		0
Balance at the end of the period	(1,464)	(1,287)
Cash Flow  Hedges | Interest rate contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	179	108
Cash Flow  Hedges | Commodity contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	(1)
Cash Flow  Hedges | Foreign exchange contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	3	4
Cash Flow  Hedges | Other contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	(1)	(4)
Excluded Components of Fair Value Hedges
Changes in AOCI
Balance at the beginning of the period	0
Other comprehensive income/(loss) retained in AOCI	7
Total before tax impact	7
Income tax on amounts retained in AOCI	0
Income tax on amounts reclassified to earnings	0
Tax impact	0
Balance at the end of the period	7
Net Investment Hedges
Changes in AOCI
Balance at the beginning of the period	(317)	(598)
Other comprehensive income/(loss) retained in AOCI	(228)	167
Total before tax impact	(228)	167
Income tax on amounts retained in AOCI	7	(20)
Income tax on amounts reclassified to earnings	0	0
Tax impact	7	(20)
Other		0
Balance at the end of the period	(538)	(451)
Cumulative Translation Adjustment
Changes in AOCI
Balance at the beginning of the period	1,396	4,323
Other comprehensive income/(loss) retained in AOCI	1,760	(1,831)
Total before tax impact	1,760	(1,831)
Income tax on amounts retained in AOCI	0	0
Income tax on amounts reclassified to earnings	0	0
Tax impact	0	0
Other		0
Balance at the end of the period	3,156	2,492
Equity Investees
Changes in AOCI
Balance at the beginning of the period	67	34
Other comprehensive income/(loss) retained in AOCI	8	26
Total before tax impact	8	26
Income tax on amounts retained in AOCI	(2)	(7)
Income tax on amounts reclassified to earnings	0	0
Tax impact	(2)	(7)
Other		(7)
Balance at the end of the period	73	46
Pension and OPEB Adjustment
Changes in AOCI
Balance at the beginning of the period	(345)	(317)
Other comprehensive (income)/loss reclassified to earnings	13	59
Total before tax impact	13	59
Income tax on amounts retained in AOCI	0	0
Income tax on amounts reclassified to earnings	(3)	(15)
Tax impact	(3)	(15)
Other		55
Balance at the end of the period	$ (335)	$ (218)

IMPAIRMENT OF EQUITY INVESTME_2

IMPAIRMENT OF EQUITY INVESTMENTS (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Impairment loss on equity method investments	$ 615	$ 0	$ 2,351	$ 0
Loss from equity investments	$ (315)	$ (333)	$ (805)	$ (1,159)
Steckman Ridge, LP
Schedule of Equity Method Investments [Line Items]
Ownership interest (percent)	50.00%		50.00%
Impairment loss on equity method investments	$ 221		$ 221
Carrying value of investment	$ 96		$ 96		$ 222
Southeast Supply Header, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (percent)	50.00%		50.00%
Impairment loss on equity method investments	$ 394		$ 394
Carrying value of investment	$ 87		$ 87		484
DCP Midstream, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (percent)	50.00%		50.00%
Impairment loss on equity method investments	$ 0		$ 1,700
Loss from equity investments	324		324
Carrying value of investment	$ 340		$ 340		$ 2,200

RISK MANAGEMENT AND FINANCIAL_3

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Market Risk (Details)	9 Months Ended
	Sep. 30, 2020equity_type
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Floating rate debt as target percentage of total debt outstanding	30.00%
Short-term pay fixed-receive floating interest rate swaps
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Average swap rate (percent)	3.00%
Long-term forward starting interest rate swaps
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Average swap rate (percent)	2.30%
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Number of forms of stock-based compensation with equity price risk	1

RISK MANAGEMENT AND FINANCIAL_4

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Total Derivative Instruments (Details) - CAD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	$ (2,020)	$ (1,687)
Derivative liabilities, Total Net Derivative Instruments	(2,020)	(1,687)
Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(1,333)	(1,143)
Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(712)	(531)
Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0	(13)
Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	25
Accounts receivable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	215	328
Derivative assets, Amounts Available for Offset	(105)	(125)
Derivative assets, Total Net Derivative Instruments	110	203
Current derivative assets	215	327
Accounts receivable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	210	327
Accounts receivable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	1	1
Accounts receivable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Accounts receivable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	4
Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	300	101
Derivative assets, Amounts Available for Offset	(143)	(44)
Derivative assets, Total Net Derivative Instruments	157	57
Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	248	89
Deferred amounts and other assets | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	29	12
Deferred amounts and other assets | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Deferred amounts and other assets | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	23
Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(717)	(936)
Derivative liabilities, Amounts Available for Offset	105	125
Derivative liabilities, Total Net Derivative Instruments	(612)	(811)
Current derivative liabilities	716	920
Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(543)	(565)
Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(172)	(358)
Accounts payable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	(13)
Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(2)
Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(1,818)	(1,180)
Derivative liabilities, Amounts Available for Offset	143	44
Derivative liabilities, Total Net Derivative Instruments	(1,675)	(1,136)
Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(1,248)	(994)
Other long-term liabilities | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(570)	(186)
Other long-term liabilities | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Other long-term liabilities | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Accounts receivable from affiliates
TOTAL DERIVATIVE INSTRUMENTS
Current derivative assets	0	1
Accounts payable to affiliates
TOTAL DERIVATIVE INSTRUMENTS
Current derivative liabilities	1	16
Foreign exchange contracts
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(1,241)	(1,102)
Derivative liabilities, Total Net Derivative Instruments	(1,241)	(1,102)
Foreign exchange contracts | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(1,280)	(1,094)
Foreign exchange contracts | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	14	5
Foreign exchange contracts | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0	(13)
Foreign exchange contracts | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	25
Foreign exchange contracts | Accounts receivable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	56	161
Derivative assets, Amounts Available for Offset	(23)	(78)
Derivative assets, Total Net Derivative Instruments	33	83
Foreign exchange contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	52	161
Foreign exchange contracts | Accounts receivable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Foreign exchange contracts | Accounts receivable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Foreign exchange contracts | Accounts receivable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	4
Foreign exchange contracts | Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	226	81
Derivative assets, Amounts Available for Offset	(111)	(42)
Derivative assets, Total Net Derivative Instruments	115	39
Foreign exchange contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	184	71
Foreign exchange contracts | Deferred amounts and other assets | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	19	10
Foreign exchange contracts | Deferred amounts and other assets | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Foreign exchange contracts | Deferred amounts and other assets | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	23
Foreign exchange contracts | Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(383)	(410)
Derivative liabilities, Amounts Available for Offset	23	78
Derivative liabilities, Total Net Derivative Instruments	(360)	(332)
Foreign exchange contracts | Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(376)	(392)
Foreign exchange contracts | Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(5)	(5)
Foreign exchange contracts | Accounts payable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	(13)
Foreign exchange contracts | Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(2)
Foreign exchange contracts | Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(1,140)	(934)
Derivative liabilities, Amounts Available for Offset	111	42
Derivative liabilities, Total Net Derivative Instruments	(1,029)	(892)
Foreign exchange contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(1,140)	(934)
Foreign exchange contracts | Other long-term liabilities | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Foreign exchange contracts | Other long-term liabilities | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Foreign exchange contracts | Other long-term liabilities | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Interest rate contracts
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(753)	(534)
Derivative liabilities, Total Net Derivative Instruments	(753)	(534)
Interest rate contracts | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(28)	0
Interest rate contracts | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(725)	(534)
Interest rate contracts | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0	0
Interest rate contracts | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0
Interest rate contracts | Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	8
Derivative assets, Amounts Available for Offset	(3)
Derivative assets, Total Net Derivative Instruments	5
Interest rate contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0
Interest rate contracts | Deferred amounts and other assets | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	8
Interest rate contracts | Deferred amounts and other assets | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0
Interest rate contracts | Deferred amounts and other assets | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0
Interest rate contracts | Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(172)	(353)
Derivative liabilities, Amounts Available for Offset	0	0
Derivative liabilities, Total Net Derivative Instruments	(172)	(353)
Interest rate contracts | Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(5)	0
Interest rate contracts | Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(167)	(353)
Interest rate contracts | Accounts payable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Interest rate contracts | Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Interest rate contracts | Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(589)	(181)
Derivative liabilities, Amounts Available for Offset	3	0
Derivative liabilities, Total Net Derivative Instruments	(586)	(181)
Interest rate contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(23)	0
Interest rate contracts | Other long-term liabilities | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(566)	(181)
Interest rate contracts | Other long-term liabilities | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Interest rate contracts | Other long-term liabilities | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Commodity contracts
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(15)	(58)
Derivative liabilities, Total Net Derivative Instruments	(15)	(58)
Commodity contracts | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(18)	(53)
Commodity contracts | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	3	(5)
Commodity contracts | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0	0
Commodity contracts | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0
Commodity contracts | Accounts receivable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	159	163
Derivative assets, Amounts Available for Offset	(82)	(47)
Derivative assets, Total Net Derivative Instruments	77	116
Commodity contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	158	163
Commodity contracts | Accounts receivable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	1	0
Commodity contracts | Accounts receivable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Commodity contracts | Accounts receivable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0
Commodity contracts | Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	66	17
Derivative assets, Amounts Available for Offset	(29)	(2)
Derivative assets, Total Net Derivative Instruments	37	15
Commodity contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	64	17
Commodity contracts | Deferred amounts and other assets | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	2	0
Commodity contracts | Deferred amounts and other assets | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Commodity contracts | Deferred amounts and other assets | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0
Commodity contracts | Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(160)	(173)
Derivative liabilities, Amounts Available for Offset	82	47
Derivative liabilities, Total Net Derivative Instruments	(78)	(126)
Commodity contracts | Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(160)	(173)
Commodity contracts | Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Commodity contracts | Accounts payable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Commodity contracts | Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Commodity contracts | Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(80)	(65)
Derivative liabilities, Amounts Available for Offset	29	2
Derivative liabilities, Total Net Derivative Instruments	(51)	(63)
Commodity contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(80)	(60)
Commodity contracts | Other long-term liabilities | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	(5)
Commodity contracts | Other long-term liabilities | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Commodity contracts | Other long-term liabilities | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Other contracts
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(11)	7
Derivative liabilities, Total Net Derivative Instruments	(11)	7
Other contracts | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(7)	4
Other contracts | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(4)	3
Other contracts | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0	0
Other contracts | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0
Other contracts | Accounts receivable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets		4
Derivative assets, Amounts Available for Offset		0
Derivative assets, Total Net Derivative Instruments		4
Other contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets		3
Other contracts | Accounts receivable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets		1
Other contracts | Accounts receivable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets		0
Other contracts | Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets		3
Derivative assets, Amounts Available for Offset		0
Derivative assets, Total Net Derivative Instruments		3
Other contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets		1
Other contracts | Deferred amounts and other assets | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets		2
Other contracts | Deferred amounts and other assets | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets		$ 0
Other contracts | Deferred amounts and other assets | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0
Other contracts | Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(2)
Derivative liabilities, Amounts Available for Offset	0
Derivative liabilities, Total Net Derivative Instruments	(2)
Other contracts | Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(2)
Other contracts | Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Other contracts | Accounts payable and other | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Other contracts | Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Other contracts | Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(9)
Derivative liabilities, Amounts Available for Offset	0
Derivative liabilities, Total Net Derivative Instruments	(9)
Other contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(5)
Other contracts | Other long-term liabilities | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(4)
Other contracts | Other long-term liabilities | Net Investment Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0
Other contracts | Other long-term liabilities | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	$ 0

RISK MANAGEMENT AND FINANCIAL_5

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Notional Principal or Quantity Information (Details) - Sep. 30, 2020 € in Millions, ¥ in Millions, £ in Millions, $ in Millions, $ in Millions	USD ($)MWhBcfMMBbls	GBP (£)MWhBcfMMBbls	EUR (€)MWhBcfMMBbls	JPY (¥)MWhBcfMMBbls	CAD ($)MWhBcfMMBbls
Foreign exchange contracts - forwards - purchase | United States dollar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020	$ 1,117
2021	500
2022	1,750
2023	0
2024	0
Thereafter	0
Derivative Notional Amount Outstanding	3,367
Foreign exchange contracts - forwards - purchase | Japanese yen
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 | ¥				¥ 0
2021 | ¥				0
2022 | ¥				72,500
2023 | ¥				0
2024 | ¥				0
Thereafter | ¥				0
Derivative Notional Amount Outstanding | ¥				¥ 72,500
Foreign exchange contracts - forwards - sell | United States dollar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020	1,593
2021	5,631
2022	5,703
2023	3,784
2024	1,856
Thereafter	0
Derivative Notional Amount Outstanding	$ 18,567
Foreign exchange contracts - forwards - sell | GBP
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 | £		£ 70
2021 | £		27
2022 | £		28
2023 | £		29
2024 | £		30
Thereafter | £		90
Derivative Notional Amount Outstanding | £		£ 274
Foreign exchange contracts - forwards - sell | Euro
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 | €			€ 23
2021 | €			94
2022 | €			94
2023 | €			92
2024 | €			91
Thereafter | €			514
Derivative Notional Amount Outstanding | €			€ 908
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020					$ 1,265
2021					4,129
2022					407
2023					48
2024					35
Thereafter					121
Derivative Notional Amount Outstanding					6,005
Interest rate contracts - long-term debt pay fixed rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020					508
2021					1,584
2022					2,035
2023					1,368
2024					0
Thereafter					0
Derivative Notional Amount Outstanding					5,495
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020					19
2021					44
2022					7
2023					11
2024					0
Thereafter					0
Derivative Notional Amount Outstanding					$ 81
Commodity contracts | Natural gas
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 (bcf/mmbbls) | Bcf	25	25	25	25	25
2021 (bcf/mmbbls) | Bcf	60	60	60	60	60
2022 (bcf/mmbbls) | Bcf	31	31	31	31	31
2023 (bcf/mmbbls) | Bcf	18	18	18	18	18
2024 (bcf/mmbbls) | Bcf	10	10	10	10	10
Thereafter (bcf/mmbbls) | Bcf	10	10	10	10	10
Derivative Nonmonetary Notional Amount Outstanding | Bcf	154	154	154	154	154
Commodity contracts | Crude oil
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 (bcf/mmbbls) | MMBbls	4	4	4	4	4
2021 (bcf/mmbbls) | MMBbls	12	12	12	12	12
2022 (bcf/mmbbls) | MMBbls	1	1	1	1	1
2023 (bcf/mmbbls) | MMBbls	0	0	0	0	0
2024 (bcf/mmbbls) | MMBbls	0	0	0	0	0
Thereafter (bcf/mmbbls) | MMBbls	0	0	0	0	0
Derivative Nonmonetary Notional Amount Outstanding | MMBbls	17	17	17	17	17
Net purchase | Commodity contracts | Power
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 (MW/H) | MWh	65	65	65	65	65
Net sell | Commodity contracts | Power
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2021 (MW/H) | MWh	3	3	3	3	3
2022 (MW/H) | MWh	43	43	43	43	43
2023 (MW/H) | MWh	43	43	43	43	43
2024 (MW/H) | MWh	43	43	43	43	43
Thereafter (MW/H) | MWh	43	43	43	43	43
Total (MW/H) | MWh	30	30	30	30	30

RISK MANAGEMENT AND FINANCIAL_6

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Fair Value Derivatives (Details) - Fair Value Hedges - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Foreign Currency Fair Value Hedge Derivative [Line Items]
Unrealized gain/(loss) on derivative	$ (60)	$ 0	$ 25	$ 0
Unrealized gain/(loss) on hedged item	59	0	(6)	0
Realized loss on derivative	$ 0	$ 0	$ (12)	$ 0

RISK MANAGEMENT AND FINANCIAL_7

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Earnings and Comprehensive Income (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of unrealized gain/(loss) recognized in OCI	$ 56	$ (230)	$ (681)	$ (838)
Excluded components of fair value hedges	(1)	0	7	0
Amount of (gain) loss reclassified from AOCI to earnings	75	37	180	108
Estimated gain (loss) of AOCI related to cash flow hedges reclassified to earnings in the next 12 months			$ (99)
Maximum term of hedging exposures to variability of cash flows			39 months
Unrealized gain (loss) on derivatives			$ (200)	1,005
Non-Qualifying Derivative Instruments
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives	624	(107)	(200)	1,005
Foreign exchange contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of (gain) loss reclassified from AOCI to earnings	1	2	3	4
Foreign exchange contracts | Non-Qualifying Derivative Instruments
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives	571	(179)	(186)	849
Foreign exchange contracts | Non-Qualifying Derivative Instruments | Transportation and other services
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives			(87)	366
Foreign exchange contracts | Non-Qualifying Derivative Instruments | Other income/(expense)
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives			(99)	483
Interest rate contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of (gain) loss reclassified from AOCI to earnings	76	36	179	108
Interest rate contracts | Non-Qualifying Derivative Instruments
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives	(13)	0	(28)	178
Commodity contracts | Non-Qualifying Derivative Instruments
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives	69	73	25	(26)
Commodity contracts | Non-Qualifying Derivative Instruments | Transportation and other services
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives			8	(15)
Commodity contracts | Non-Qualifying Derivative Instruments | Commodity sales
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives			(176)	(418)
Commodity contracts | Non-Qualifying Derivative Instruments | Commodity costs
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives			195	382
Commodity contracts | Non-Qualifying Derivative Instruments | Operating and administrative expense
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives			(2)	25
Other contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of (gain) loss reclassified from AOCI to earnings	(1)	(1)	(1)	(4)
Other contracts | Non-Qualifying Derivative Instruments
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives	(3)	(1)	(11)	4
Cash Flow Hedges | Foreign exchange contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of unrealized gain/(loss) recognized in OCI	0	2	6	(11)
Cash Flow Hedges | Interest rate contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of unrealized gain/(loss) recognized in OCI	41	(231)	(709)	(812)
Cash Flow Hedges | Commodity contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of unrealized gain/(loss) recognized in OCI	(1)	(1)	8	(22)
Cash Flow Hedges | Other contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of unrealized gain/(loss) recognized in OCI	0	1	(6)	6
Fair Value Hedges | Foreign exchange contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Excluded components of fair value hedges	(1)	0	7	0
Net Investment Hedges | Foreign exchange contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of unrealized gain/(loss) recognized in OCI	$ 17	$ (1)	$ 13	$ 1

RISK MANAGEMENT AND FINANCIAL_8

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Liquidity and Credit Risk (Details) - CAD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
LIQUIDITY RISK AND CREDIT RISK
Rolling time period over which the Company forecasts cash requirements	12 months
Period of anticipated requirements for which the Company maintains sufficient liquidity through committed credit facilities	1 year
Letters of credit issued in lieu of cash collateral	$ 0
Period after which receivables are classified as past due	30 days
Derivative instruments
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	$ 499,000,000	$ 394,000,000
Cash collateral on asset exposure	0	0
Derivative instruments | Canadian financial institutions
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	190,000,000	146,000,000
Derivative instruments | United States financial institutions
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	79,000,000	40,000,000
Derivative instruments | European financial institutions
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	25,000,000	3,000,000
Derivative instruments | Asian financial institutions
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	91,000,000	92,000,000
Derivative instruments | Other
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	$ 114,000,000	$ 113,000,000

RISK MANAGEMENT AND FINANCIAL_9

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Fair Value of Derivatives (Details) - CAD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Fair Value of Derivatives
Total net derivative asset/(liability)	$ (2,020)	$ (1,687)
Foreign exchange contracts
Fair Value of Derivatives
Total net derivative asset/(liability)	(1,241)	(1,102)
Interest rate contracts
Fair Value of Derivatives
Total net derivative asset/(liability)	(753)	(534)
Commodity contracts
Fair Value of Derivatives
Total net derivative asset/(liability)	(15)	(58)
Other contracts
Fair Value of Derivatives
Total net derivative asset/(liability)	(11)	7
Recurring basis
Fair Value of Derivatives
Current derivative assets	215	328
Long-term derivative assets	300	101
Current derivative liabilities	(717)	(936)
Long-term derivative liabilities	(1,818)	(1,180)
Total net derivative asset/(liability)	(2,020)	(1,687)
Recurring basis | Foreign exchange contracts
Fair Value of Derivatives
Current derivative assets	56	161
Long-term derivative assets	226	81
Current derivative liabilities	(383)	(410)
Long-term derivative liabilities	(1,140)	(934)
Total net derivative asset/(liability)	(1,241)	(1,102)
Recurring basis | Interest rate contracts
Fair Value of Derivatives
Current derivative assets		163
Long-term derivative assets	8
Current derivative liabilities	(172)	(353)
Long-term derivative liabilities	(589)	(181)
Total net derivative asset/(liability)	(753)	(534)
Recurring basis | Commodity contracts
Fair Value of Derivatives
Current derivative assets	159	4
Long-term derivative assets	66	17
Current derivative liabilities	(160)	(173)
Long-term derivative liabilities	(80)	(65)
Total net derivative asset/(liability)	(15)	(58)
Recurring basis | Other contracts
Fair Value of Derivatives
Long-term derivative assets		3
Current derivative liabilities	(2)
Long-term derivative liabilities	(9)
Total net derivative asset/(liability)	(11)	7
Level 1 | Recurring basis
Fair Value of Derivatives
Current derivative assets	16	0
Long-term derivative assets	13	0
Current derivative liabilities	(16)	(5)
Long-term derivative liabilities	(11)	0
Total net derivative asset/(liability)	2	(5)
Level 1 | Recurring basis | Foreign exchange contracts
Fair Value of Derivatives
Current derivative assets	0	0
Long-term derivative assets	0	0
Current derivative liabilities	0	0
Long-term derivative liabilities	0	0
Total net derivative asset/(liability)	0	0
Level 1 | Recurring basis | Interest rate contracts
Fair Value of Derivatives
Current derivative assets		0
Long-term derivative assets	0
Current derivative liabilities	0	0
Long-term derivative liabilities	0	0
Total net derivative asset/(liability)	0	0
Level 1 | Recurring basis | Commodity contracts
Fair Value of Derivatives
Current derivative assets	16	0
Long-term derivative assets	13	0
Current derivative liabilities	(16)	(5)
Long-term derivative liabilities	(11)	0
Total net derivative asset/(liability)	2	(5)
Level 1 | Recurring basis | Other contracts
Fair Value of Derivatives
Long-term derivative assets		0
Current derivative liabilities	0
Long-term derivative liabilities	0
Total net derivative asset/(liability)	0	0
Level 2 | Recurring basis
Fair Value of Derivatives
Current derivative assets	103	198
Long-term derivative assets	281	96
Current derivative liabilities	(585)	(786)
Long-term derivative liabilities	(1,757)	(1,121)
Total net derivative asset/(liability)	(1,958)	(1,613)
Level 2 | Recurring basis | Foreign exchange contracts
Fair Value of Derivatives
Current derivative assets	56	161
Long-term derivative assets	226	81
Current derivative liabilities	(383)	(410)
Long-term derivative liabilities	(1,140)	(934)
Total net derivative asset/(liability)	(1,241)	(1,102)
Level 2 | Recurring basis | Interest rate contracts
Fair Value of Derivatives
Current derivative assets		33
Long-term derivative assets	8
Current derivative liabilities	(172)	(353)
Long-term derivative liabilities	(589)	(181)
Total net derivative asset/(liability)	(753)	(534)
Level 2 | Recurring basis | Commodity contracts
Fair Value of Derivatives
Current derivative assets	47	4
Long-term derivative assets	47	12
Current derivative liabilities	(28)	(23)
Long-term derivative liabilities	(19)	(6)
Total net derivative asset/(liability)	47	16
Level 2 | Recurring basis | Other contracts
Fair Value of Derivatives
Long-term derivative assets		3
Current derivative liabilities	(2)
Long-term derivative liabilities	(9)
Total net derivative asset/(liability)	(11)	7
Level 3 | Recurring basis
Fair Value of Derivatives
Current derivative assets	96	130
Long-term derivative assets	6	5
Current derivative liabilities	(116)	(145)
Long-term derivative liabilities	(50)	(59)
Total net derivative asset/(liability)	(64)	(69)
Level 3 | Recurring basis | Foreign exchange contracts
Fair Value of Derivatives
Current derivative assets	0	0
Long-term derivative assets	0	0
Current derivative liabilities	0	0
Long-term derivative liabilities	0	0
Total net derivative asset/(liability)	0	0
Level 3 | Recurring basis | Interest rate contracts
Fair Value of Derivatives
Current derivative assets		130
Long-term derivative assets	0
Current derivative liabilities	0	0
Long-term derivative liabilities	0	0
Total net derivative asset/(liability)	0	0
Level 3 | Recurring basis | Commodity contracts
Fair Value of Derivatives
Current derivative assets	96	0
Long-term derivative assets	6	5
Current derivative liabilities	(116)	(145)
Long-term derivative liabilities	(50)	(59)
Total net derivative asset/(liability)	(64)	(69)
Level 3 | Recurring basis | Other contracts
Fair Value of Derivatives
Long-term derivative assets		0
Current derivative liabilities	0
Long-term derivative liabilities	0
Total net derivative asset/(liability)	$ 0	$ 0

RISK MANAGEMENT AND FINANCIA_10

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Level 3 Inputs (Details) $ in Millions	Sep. 30, 2020CAD ($)$ / MillionsofBTU-MMBTU$ / Gallon-gal$ / MWh$ / bbl	Dec. 31, 2019CAD ($)
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	$ (2,020)	$ (1,687)
Recurring basis
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	(2,020)	(1,687)
Level 3 | Recurring basis
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	$ (64)	$ (69)
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Natural gas | Minimum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MillionsofBTU-MMBTU	2
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Natural gas | Maximum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MillionsofBTU-MMBTU	5.51
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Natural gas | Weighted Average
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MillionsofBTU-MMBTU	3.53
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Crude oil | Minimum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / bbl	24.11
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Crude oil | Maximum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / bbl	54.70
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Crude oil | Weighted Average
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / bbl	39.72
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Power | Minimum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MWh	21.76
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Power | Maximum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MWh	65.93
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Power | Weighted Average
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MWh	53.79
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Natural gas | Minimum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MillionsofBTU-MMBTU	1.04
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Natural gas | Maximum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MillionsofBTU-MMBTU	6.77
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Natural gas | Weighted Average
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / MillionsofBTU-MMBTU	3.52
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Crude oil | Minimum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / bbl	35.01
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Crude oil | Maximum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / bbl	57.60
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Crude oil | Weighted Average
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / bbl	42.50
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | NGL | Minimum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / Gallon-gal	0.26
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | NGL | Maximum
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / Gallon-gal	1.32
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | NGL | Weighted Average
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Forward price ($/mmbtu,barrel,gallon,MW/H) | $ / Gallon-gal	0.61
Market approach valuation technique | Level 3 | Recurring basis | Commodity Contracts - Financial | Natural gas
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	$ (5)
Market approach valuation technique | Level 3 | Recurring basis | Commodity Contracts - Financial | Crude oil
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	13
Market approach valuation technique | Level 3 | Recurring basis | Commodity Contracts - Financial | Power
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	(49)
Market approach valuation technique | Level 3 | Recurring basis | Commodity Contracts - Physical | Natural gas
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	4
Market approach valuation technique | Level 3 | Recurring basis | Commodity Contracts - Physical | Crude oil
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	(29)
Market approach valuation technique | Level 3 | Recurring basis | Commodity Contracts - Physical | NGL
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	$ 2

RISK MANAGEMENT AND FINANCIA_11

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Changes in Level 3 (Details) - CAD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Changes in net fair value of derivative assets and liabilities classified as Level 3
Level 3 net derivative liability at beginning of period	$ (69)	$ (11)
Total gain/(loss) unrealized
Included in earnings	(40)	67
Included in OCI	7	(22)
Settlements	38	(98)
Level 3 net derivative liability at end of period	$ (64)	$ (64)

RISK MANAGEMENT AND FINANCIA_12

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Other Financial Instruments (Details) - CAD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Fair Value of Other Financial Instruments
FMVA investments		$ 56		$ 99
Long-term debt, carrying value		66,900		64,400
Long-term debt		74,100		70,500
Southeast Supply Header, LLC
Fair Value of Other Financial Instruments
Carrying value of investment		$ 87		484
Southeast Supply Header, LLC | Weighted Average Cost of Capital | Discounted Cash Flow Model
Fair Value of Other Financial Instruments
Fair value measurement input (percent)		8.00%
Southeast Supply Header, LLC | Long-term Revenue Growth Rate | Discounted Cash Flow Model
Fair Value of Other Financial Instruments
Fair value measurement input (percent)		0.50%
Steckman Ridge, LP
Fair Value of Other Financial Instruments
Carrying value of investment		$ 96		222
Steckman Ridge, LP | Weighted Average Cost of Capital | Discounted Cash Flow Model
Fair Value of Other Financial Instruments
Fair value measurement input (percent)		9.00%
Steckman Ridge, LP | Long-term Revenue Growth Rate | Discounted Cash Flow Model
Fair Value of Other Financial Instruments
Fair value measurement input (percent)		1.00%
Net Investment Hedges
Fair Value of Other Financial Instruments
Unrealized foreign exchange gain (loss) on translation of United States dollar denominated debt		$ (226)	$ 166
Unrealized gain (loss) on change in fair value of outstanding forward exchange forward contracts	$ 13		1
Net Investment Hedges | Foreign exchange contracts
Fair Value of Other Financial Instruments
Realized gain (loss) associated with the settlement of United Stated dollar denominated debt that matured		(15)	0
Net Investment Hedges | United States Dollar Denominated Debt
Fair Value of Other Financial Instruments
Realized gain (loss) associated with the settlement of United Stated dollar denominated debt that matured		0	$ 0
Preferred share investment
Fair Value of Other Financial Instruments
Held to maturity investment at amortized cost		$ 566		580
Cumulative dividends based on average yield of Government of Canada bonds, maturity period of bonds		10 years
Cumulative dividends based on average yield of Government of Canada bonds, spread over reference rate (as a percent)		4.38%
Held to maturity investment, fair value		$ 566		580
Fair Value
Fair Value of Other Financial Instruments
Restricted long-term investments held in trust		527		434
Carrying value
Fair Value of Other Financial Instruments
Noncurrent notes receivable		$ 1,100		$ 1,000

INCOME TAXES (Details)

INCOME TAXES (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate (as a percent)	17.30%	19.40%	15.30%	20.60%

PENSION AND OTHER POSTRETIREM_3

PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 50	$ 50	$ 150	$ 152
Interest cost	44	51	131	152
Expected return on plan assets	(90)	(84)	(270)	(252)
Amortization of actuarial loss and prior service costs	9	7	28	22
Net periodic benefit costs	13	$ 24	39	$ 74
Severance costs	$ 236		$ 236