Enbridge (ENB) 10-Q 7 May 21 2021 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2021	Apr. 30, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
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		2,025,576,385
Entity Central Index Key	0000895728
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
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
	Mar. 31, 2021	Mar. 31, 2020
Operating revenues
Total operating revenues	$ 12,187	$ 12,013
Operating expenses
Operating and administrative	1,559	1,600
Depreciation and amortization	932	882
Total operating expenses	9,639	10,500
Operating income/(loss)	2,548	1,513
Income from equity investments	395	163
Impairment of equity investments (Note 8)	0	(1,736)
Other income/(expense)
Net foreign currency gain/(loss)	152	(956)
Other	59	(191)
Interest expense	(657)	(706)
Earnings/(loss) before income taxes	2,497	(1,913)
Income tax (expense)/recovery (Note 10)	(483)	549
Earnings/(loss)	2,014	(1,364)
(Earnings)/loss attributable to noncontrolling interests	(22)	31
Earnings/(loss) attributable to controlling interests	1,992	(1,333)
Preference share dividends	(92)	(96)
Earnings/(loss) attributable to common shareholders	$ 1,900	$ (1,429)
Earnings/(loss) per common share attributable to common shareholders (in Canadian dollars per share)	$ 0.94	$ (0.71)
Diluted earnings/(loss) per common share attributable to common shareholders (in Canadian dollars per share)	$ 0.94	$ (0.71)
Commodity sales
Operating revenues
Total operating revenues	$ 6,429	$ 7,389
Operating expenses
Commodity costs and Gas distribution costs	6,198	7,163
Transportation and other services
Operating revenues
Total operating revenues	4,218	3,208
Gas distribution revenue
Operating revenues
Total operating revenues	1,540	1,416
Operating expenses
Commodity costs and Gas distribution costs	$ 950	$ 855

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Earnings/(loss)	$ 2,014	$ (1,364)
Other comprehensive income/(loss), net of tax
Change in unrealized gain/(loss) on cash flow hedges	370	(513)
Change in unrealized gain/(loss) on net investment hedges	93	(715)
Other comprehensive loss from equity investees	(22)	(10)
Excluded components of fair value hedges	(1)	3
Reclassification to earnings of loss on cash flow hedges	52	32
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	5	3
Foreign currency translation adjustments	(796)	5,637
Other comprehensive (loss)/income, net of tax	(299)	4,437
Comprehensive income	1,715	3,073
Comprehensive loss/(income) attributable to noncontrolling interests	3	(145)
Comprehensive income attributable to controlling interests	1,718	2,928
Preference share dividends	(92)	(96)
Comprehensive income attributable to common shareholders	$ 1,626	$ 2,832

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD ($) $ in Millions	Total	Preference shares	Common shares	Additional paid-in capital	Deficit	Accumulated other comprehensive (loss)/income (Note 7)	Reciprocal shareholding	Total Enbridge Inc. shareholders’ equity	Noncontrolling interests	AdjustmentDeficit
Balance at the beginning of the period at Dec. 31, 2019		$ 7,747	$ 64,746	$ 187	$ (6,314)	$ (272)	$ (51)		$ 3,364	$ (66)
Increase (Decrease) in Stockholders' Equity
Options exercised			14	(16)
Stock-based compensation				14
Change in reciprocal interest				12			4
Other				5
Earnings/(loss) attributable to controlling interests	$ (1,333)				(1,333)
Preference share dividends					(96)
Dividends paid to reciprocal shareholder					5
Other					(4)
Other comprehensive (loss)/income attributable to common shareholders, net of tax						4,261
Earnings/(loss) attributable to noncontrolling interests									(31)
Change in unrealized loss on cash flow hedges									(2)
Foreign currency translation adjustments									178
Contributions									15
Distributions									(76)
Balance at the end of the period at Mar. 31, 2020	$ 72,291	7,747	64,760	202	(7,808)	3,989	(47)	$ 68,843	3,448
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.810
Balance at the beginning of the period at Dec. 31, 2020	$ 64,363	7,747	64,768	277	(9,995)	(1,401)	(29)		2,996	$ 0
Increase (Decrease) in Stockholders' Equity
Options exercised			4	(3)
Stock-based compensation				11
Change in reciprocal interest				39			12
Other				0
Earnings/(loss) attributable to controlling interests	1,992				1,992
Preference share dividends					(92)
Dividends paid to reciprocal shareholder					3
Other					(1)
Other comprehensive (loss)/income attributable to common shareholders, net of tax						(274)
Earnings/(loss) attributable to noncontrolling interests									22
Change in unrealized loss on cash flow hedges									(3)
Foreign currency translation adjustments									(22)
Contributions									3
Distributions									(66)
Balance at the end of the period at Mar. 31, 2021	$ 65,988	$ 7,747	$ 64,772	$ 324	$ (8,093)	$ (1,675)	$ (17)	$ 63,058	$ 2,930
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.835

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities
Earnings/(loss)	$ 2,014	$ (1,364)
Adjustments to reconcile earnings/(loss) to net cash provided by operating activities:
Depreciation and amortization	932	882
Deferred income tax expense/(recovery)	369	(713)
Changes in unrealized (gain)/loss on derivative instruments, net (Note 9)	(315)	1,556
Income from equity investments	(395)	(163)
Distributions from equity investments	388	428
Impairment of equity investments (Note 8)	0	1,736
Gain on disposition	(41)	0
Other	30	253
Changes in operating assets and liabilities	(418)	194
Net cash provided by operating activities	2,564	2,809
Investing activities
Capital expenditures	(2,059)	(1,147)
Long-term investments and restricted long-term investments	(61)	(87)
Distributions from equity investments in excess of cumulative earnings	61	77
Additions to intangible assets	(65)	(69)
Proceeds from disposition	122	0
Affiliate loans, net	44	(44)
Net cash used in investing activities	(1,958)	(1,270)
Financing activities
Net change in short-term borrowings	(27)	(63)
Net change in commercial paper and credit facility draws	1,727	1,159
Debenture and term note issues, net of issue costs	629	990
Debenture and term note repayments	(912)	(1,657)
Contributions from noncontrolling interests	3	15
Distributions to noncontrolling interests	(66)	(76)
Common shares issued	0	1
Preference share dividends	(92)	(96)
Common share dividends	(1,691)	(1,641)
Redemption of preferred shares held by subsidiary	(115)	0
Other	(21)	(18)
Net cash used in financing activities	(565)	(1,386)
Effect of translation of foreign denominated cash and cash equivalents and restricted cash	(7)	11
Net increase in cash and cash equivalents and restricted cash	34	164
Cash and cash equivalents and restricted cash at beginning of period	490	676
Cash and cash equivalents and restricted cash at end of period	$ 524	$ 840

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL POSITION - CAD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 465	$ 452
Restricted cash	59	38
Accounts receivable and other	6,227	5,258
Accounts receivable from affiliates	30	66
Inventory	853	1,536
Total current assets	7,634	7,350
Property, plant and equipment, net	95,141	94,571
Long-term investments	13,627	13,818
Restricted long-term investments	529	553
Deferred amounts and other assets	8,542	8,446
Intangible assets, net	2,219	2,080
Goodwill	32,365	32,688
Deferred income taxes	638	770
Total assets	160,695	160,276
Current liabilities
Short-term borrowings	1,094	1,121
Accounts payable and other	7,211	9,228
Accounts payable to affiliates	18	22
Interest payable	589	651
Current portion of long-term debt	4,014	2,957
Total current liabilities	12,926	13,979
Long-term debt	62,688	62,819
Other long-term liabilities	8,360	8,783
Deferred income taxes	10,733	10,332
Total liabilities	94,707	95,913
Contingencies (Note 12)
Share capital
Preference shares	7,747	7,747
Common shares (2,026 outstanding at March 31, 2021 and December 31, 2020)	64,772	64,768
Additional paid-in capital	324	277
Deficit	(8,093)	(9,995)
Accumulated other comprehensive loss (Note 7)	(1,675)	(1,401)
Reciprocal shareholding	(17)	(29)
Total Enbridge Inc. shareholders’ equity	63,058	61,367
Noncontrolling interests	2,930	2,996
Total equity	65,988	64,363
Total liabilities and equity	$ 160,695	$ 160,276

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - shares shares in Millions	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Common shares, outstanding (in shares)	2,026	2,026

BASIS OF PRESENTATION

BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2021
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 (US GAAP) and Regulation S-X for interim consolidated financial information. They do not include all of the information and notes required by US 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, 2020. 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, 2020, 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	3 Months Ended
	Mar. 31, 2021
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 For eligible hedging relationships existing as at January 1, 2021 and prospectively, we have applied the optional expedient in Accounting Standards Update (ASU) 2020-04 whereby the modification of the hedging instrument does not result in an automatic hedging relationship de-designation. The adoption of this ASU did not have a material impact on our consolidated financial statements. Clarifying Interaction between Equity Securities, Equity Method Investments and Derivatives Effective January 1, 2021, we adopted ASU 2020-01 on a prospective basis. The new standard was issued in January 2020 and clarifies that observable transactions should be considered for the purpose of applying the measurement alternative in accordance with Accounting Standards Codification (ASC) 321 Investments - Equity Securities 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 Derivatives and Hedging guidance only because, upon the contracts’ exercise, the equity securities could be accounted for under the equity method of accounting or fair value option. The adoption of this ASU did not have a material impact on our consolidated financial statements. Accounting for Income Taxes Effective January 1, 2021, we adopted ASU 2019-12 on a prospective basis. The new standard 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 Income Taxes as well as provides simplification by clarifying and amending existing guidance. The adoption of this ASU did not have a material impact on our consolidated financial statements. 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. We are currently assessing the impact of the new standard on our consolidated financial statements.

REVENUES

REVENUES	3 Months Ended
	Mar. 31, 2021
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 2,329 1,121 216 — — — 3,666 Storage and other revenues 26 74 58 — — — 158 Gas gathering and processing revenues — 7 — — — — 7 Gas distribution revenue — — 1,534 — — — 1,534 Electricity and transmission revenues — — — 76 — — 76 Total revenue from contracts with customers 2,355 1,202 1,808 76 — — 5,441 Commodity sales — — — — 6,429 — 6,429 Other revenues 1,2 212 12 6 91 — (4) 317 Intersegment revenues 132 — 9 — 4 (145) — Total revenues 2,699 1,214 1,823 167 6,433 (149) 12,187 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 2,440 1,255 215 — — — 3,910 Storage and other revenues 26 79 47 — — — 152 Gas gathering and processing revenues — 7 — — — — 7 Gas distribution revenues — — 1,417 — — — 1,417 Electricity and transmission revenues — — — 50 — — 50 Total revenue from contracts with customers 2,466 1,341 1,679 50 — — 5,536 Commodity sales — — — — 7,389 — 7,389 Other revenues 1,2 (1,017) 16 (1) 103 (7) (6) (912) Intersegment revenues 85 — 4 — 16 (105) — Total revenues 1,534 1,357 1,682 153 7,398 (111) 12,013 1 Includes mark-to-market gains/(losses) from our hedging program for the three months ended March 31, 2021 and 2020 of $130 million gain and $1,106 million loss, respectively. 2 Includes revenues from lease contracts for the three months ended March 31, 2021 and 2020 of $159 million and $158 million, respectively. We disaggregate revenues into categories which represent our principal performance obligations within each business segment. 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 Contract Receivables Contract Assets Contract Liabilities (millions of Canadian dollars) Balance as at March 31, 2021 2,120 214 1,724 Balance as at December 31, 2020 2,042 226 1,815 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 months ended March 31, 2021 included in contract liabilities at the beginning of the period was $145 million. Increases in contract liabilities from cash received, net of amounts recognized as revenues during the three months ended March 31, 2021 were $69 million. Performance Obligations There were no material revenues recognized in the three months ended March 31, 2021 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 $57.4 billion, of which $5.0 billion and $5.7 billion is expected to be recognized during the nine months ending December 31, 2021 and the year ending December 31, 2022, 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 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 2,355 1,202 1,791 76 5,424 Total revenue from contracts with customers 2,355 1,202 1,808 76 5,441 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation 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 2,466 1,341 1,664 50 5,521 Total revenue from contracts with customers 2,466 1,341 1,679 50 5,536 1 Includes revenues from crude oil and natural gas pipeline transportation, storage, natural gas gathering, compression and treating, natural gas distribution, natural gas storage services and electricity sales.

SEGMENTED INFORMATION

SEGMENTED INFORMATION	3 Months Ended
	Mar. 31, 2021
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 2,699 1,214 1,823 167 6,433 (149) 12,187 Commodity and gas distribution costs (3) — (958) — (6,353) 166 (7,148) Operating and administrative (819) (434) (272) (43) (14) 23 (1,559) Income from equity investments 154 182 22 37 — — 395 Other income/(expense) 8 11 19 (5) (2) 180 211 Earnings before interest, income taxes, and depreciation and amortization 2,039 973 634 156 64 220 4,086 Depreciation and amortization (932) Interest expense (657) Income tax expense (483) Earnings 2,014 Capital expenditures 1 1,195 482 219 5 — 12 1,913 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 1,534 1,357 1,682 153 7,398 (111) 12,013 Commodity and gas distribution costs (7) — (872) — (7,243) 104 (8,018) Operating and administrative (865) (507) (249) (50) (28) 99 (1,600) Income/(loss) from equity investments 197 (75) 23 16 2 — 163 Impairment of equity investments — (1,736) — — — — (1,736) Other income/(expense) (9) (93) 20 1 (8) (1,058) (1,147) Earnings/(loss) before interest, income taxes, and depreciation and amortization 850 (1,054) 604 120 121 (966) (325) Depreciation and amortization (882) Interest expense (706) Income tax recovery 549 Loss (1,364) Capital expenditures 1 500 391 222 23 — 22 1,158 1 Includes allowance for equity funds used during construction.

EARNINGS PER COMMON SHARE AND D

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE	3 Months Ended
	Mar. 31, 2021
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 approximately 3 million and 6 million for the three months ended March 31, 2021 and 2020, respectively, resulting from our reciprocal investment in Noverco Inc. 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 2021 2020 (number of shares in millions) Weighted average shares outstanding 2,022 2,019 Effect of dilutive options 1 2 Diluted weighted average shares outstanding 2,023 2,021 For the three months ended March 31, 2021 and 2020, 27.6 million and 16.7 million, respectively, of anti-dilutive stock options with a weighted average exercise price of $51.42 and $56.26, respectively, were excluded from the diluted earnings per common share calculation. DIVIDENDS PER SHARE On May 4, 2021, our Board of Directors declared the following quarterly dividends. All dividends are payable on June 1, 2021 to shareholders of record on May 14, 2021. Dividend per share Common Shares 1 $0.83500 Preference Shares, Series A $0.34375 Preference Shares, Series B $0.21340 Preference Shares, Series C 2 $0.15501 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 $0.24613 Preference Shares, Series 13 $0.19019 Preference Shares, Series 15 $0.18644 Preference Shares, Series 17 $0.32188 Preference Shares, Series 19 $0.30625 1 The quarterly dividend per common share was increased 3% to $0.835 from $0.81, effective March 1, 2021.

DEBT

DEBT	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
DEBT	DEBT CREDIT FACILITIES The following table provides details of our committed credit facilities as at March 31, 2021: Maturity 1 Total Draws 2 Available (millions of Canadian dollars) Enbridge Inc. 2022-2024 9,159 7,390 1,769 Enbridge (U.S.) Inc. 2022-2024 6,913 3,351 3,562 Enbridge Pipelines Inc. 2022 3,000 1,358 1,642 Enbridge Gas Inc. 2022 2,000 1,094 906 Total committed credit facilities 21,072 13,193 7,879 1 Maturity date is inclusive of the one-year term out option for certain credit facilities. 2 Includes facility draws and commercial paper issuances that are back-stopped by credit facilities. On February 10, 2021, Enbridge Inc. entered into a three year, revolving, extendible, sustainability linked credit facility for $1.0 billion with a syndicate of lenders and concurrently terminated our one year, revolving, syndicated credit facility for $3.0 billion. On February 25, 2021, two term loans with an aggregate total of US$500 million were repaid with proceeds from a floating rate notes issuance. In addition to the committed credit facilities noted above, we maintain $845 million of uncommitted demand credit facilities, of which $595 million was unutilized as at March 31, 2021. As at December 31, 2020, we had $849 million of uncommitted demand credit facilities, of which $533 million was unutilized. Our credit facilities carry a weighted average standby fee of 0.2% 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 2022 to 2024. As at March 31, 2021 and December 31, 2020, commercial paper and credit facility draws, net of short-term borrowings and non-revolving credit facilities that mature within one year, of $10.6 billion and $9.9 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 ISSUANCE During the three months ended March 31, 2021, we completed the following long-term debt issuance totaling US$500 million: Company Issue Date Principal Amount (millions of Canadian dollars unless otherwise stated) Enbridge Inc. February 2021 Floating rate notes due February 2023 1 US$500 1 Notes mature in two years and carry an interest rate set to equal Secured Overnight Financing Rate (SOFR) plus a margin of 40 basis points. LONG-TERM DEBT REPAYMENTS During the three months ended March 31, 2021, we completed the following long-term debt repayments totaling $600 million and US$250 million: Company Repayment Date Principal Amount (millions of Canadian dollars unless otherwise stated) Enbridge Inc. February 2021 4.26% medium-term notes $200 March 2021 3.16% medium-term notes $400 Spectra Energy Partners, LP March 2021 4.60% senior notes US$250 SUBORDINATED TERM NOTES As at March 31, 2021 and December 31, 2020, our fixed-to-floating and fixed-to-fixed subordinated term notes had a principal value of $7.7 billion and $7.8 billion, respectively. FAIR VALUE ADJUSTMENT As at March 31, 2021 and December 31, 2020, the net fair value adjustments for total debt assumed in the acquisition of Spectra Energy Corp were $726 million and $750 million, respectively. During the three months ended March 31, 2021 and 2020, the amortization of the fair value adjustment, recorded as a reduction to Interest expense in the Consolidated Statements of Earnings, was $12 million and $15 million, respectively. DEBT COVENANTS

COMPONENTS OF ACCUMULATED OTHER

COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME	3 Months Ended
	Mar. 31, 2021
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 three months ended March 31, 2021 and 2020 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, 2021 (1,326) 5 (215) 568 66 (499) (1,401) Other comprehensive income/(loss) retained in AOCI 493 (1) 105 (774) (26) — (203) Other comprehensive (income)/loss reclassified to earnings Interest rate contracts 1 63 — — — — — 63 Commodity contracts 2 1 — — — — — 1 Foreign exchange contracts 3 1 — — — — — 1 Amortization of pension and OPEB actuarial loss and prior service costs 4 — — — — — 7 7 Other 17 — — (20) 3 — — 575 (1) 105 (794) (23) 7 (131) Tax impact Income tax on amounts retained in AOCI (120) — (12) — 4 — (128) Income tax on amounts reclassified to earnings (13) — — — — (2) (15) (133) — (12) — 4 (2) (143) Balance as at March 31, 2021 (884) 4 (122) (226) 47 (494) (1,675) 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 (693) 3 (715) 5,459 (7) — 4,047 Other comprehensive loss reclassified to earnings Interest rate contracts 1 43 — — — — — 43 Foreign exchange contracts 3 1 — — — — — 1 Amortization of pension and OPEB actuarial loss and prior service costs 4 — — — — — 4 4 (649) 3 (715) 5,459 (7) 4 4,095 Tax impact Income tax on amounts retained in AOCI 182 — — — (3) — 179 Income tax on amounts reclassified to earnings (12) — — — — (1) (13) 170 — — — (3) (1) 166 Balance as at March 31, 2020 (1,552) 3 (1,032) 6,855 57 (342) 3,989 1 Reported within Interest expense in the Consolidated Statements of Earnings. 2 Reported within Transportation and other services revenues, 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 These components are included in the computation of net periodic benefit costs and are reported within Other income/(expense) in the Consolidated Statements of Earnings.

IMPAIRMENT OF EQUITY INVESTMENT

IMPAIRMENT OF EQUITY INVESTMENTS	3 Months Ended
	Mar. 31, 2021
Noncontrolling Interest [Abstract]
IMPAIRMENT OF EQUITY INVESTMENTS	IMPAIRMENT OF EQUITY INVESTMENTS 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 $1.7 billion for the three months ended March 31, 2020. 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 during the three months ended March 31, 2020. The carrying value of our investment in DCP Midstream as at March 31, 2021 and December 31, 2020 was $328 million and $331 million, respectively.

RISK MANAGEMENT AND FINANCIAL I

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS	3 Months Ended
	Mar. 31, 2021
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 US dollar denominated investments and subsidiaries using foreign currency derivatives and US 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 March 31, 2021, 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 2.4%. 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 US 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, including ongoing uncertainty as to the duration of the pandemic and corresponding public health measures, 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. March 31, 2021 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 — — 242 242 (36) 206 Commodity contracts — — 158 158 (93) 65 Other contracts 1 — 1 2 — 2 1 — 401 402 (129) 273 Deferred amounts and other assets Foreign exchange contracts — — 465 465 (211) 254 Interest rate contracts 247 — — 247 (26) 221 Commodity contracts — — 47 47 (14) 33 Other contracts 1 — 1 2 — 2 248 — 513 761 (251) 510 Accounts payable and other Foreign exchange contracts (10) (120) (119) (249) 36 (213) Interest rate contracts (240) — — (240) — (240) Commodity contracts (4) — (221) (225) 93 (132) (254) (120) (340) (714) 129 (585) Other long-term liabilities Foreign exchange contracts — — (543) (543) 211 (332) Interest rate contracts (79) — (23) (102) 26 (76) Commodity contracts (4) — (66) (70) 14 (56) (83) — (632) (715) 251 (464) Total net derivative assets/(liabilities) Foreign exchange contracts (10) (120) 45 (85) — (85) Interest rate contracts (72) — (23) (95) — (95) Commodity contracts (8) — (82) (90) — (90) Other contracts 2 — 2 4 — 4 (88) (120) (58) (266) — (266) December 31, 2020 Derivative Derivative Non- Total Gross Amounts Total Net (millions of Canadian dollars) Accounts receivable and other Foreign exchange contracts — — 180 180 (28) 152 Commodity contracts — — 143 143 (81) 62 — — 323 323 (109) 214 Deferred amounts and other assets Foreign exchange contracts 14 — 452 466 (218) 248 Interest rate contracts 56 — — 56 (25) 31 Commodity contracts — — 39 39 (9) 30 70 — 491 561 (252) 309 Accounts payable and other Foreign exchange contracts (5) (29) (151) (185) 28 (157) Interest rate contracts (423) — (2) (425) — (425) Commodity contracts (2) — (278) (280) 81 (199) Other contracts (1) — (3) (4) — (4) (431) (29) (434) (894) 109 (785) Other long-term liabilities Foreign exchange contracts — (87) (673) (760) 218 (542) Interest rate contracts (218) — (23) (241) 25 (216) Commodity contracts (1) — (57) (58) 9 (49) (219) (87) (753) (1,059) 252 (807) Total net derivative assets/(liabilities) Foreign exchange contracts 9 (116) (192) (299) — (299) Interest rate contracts (585) — (25) (610) — (610) Commodity contracts (3) — (153) (156) — (156) Other contracts (1) — (3) (4) — (4) (580) (116) (373) (1,069) — (1,069) The following table summarizes the maturity and notional principal or quantity outstanding related to our derivative instruments. March 31, 2021 2021 2022 2023 2024 2025 Thereafter Total Foreign exchange contracts - US dollar forwards - purchase (millions of US dollars) 1,237 1,750 — — — — 2,987 Foreign exchange contracts - US dollar forwards - sell (millions of US dollars) 4,331 5,853 3,784 1,856 648 — 16,472 Foreign exchange contracts - British pound (GBP) forwards - sell (millions of GBP) 75 28 29 30 30 60 252 Foreign exchange contracts - Euro forwards - sell (millions of Euro) 85 94 92 91 86 428 876 Foreign exchange contracts - Japanese yen forwards - purchase (millions of yen) — 72,500 — — — — 72,500 Interest rate contracts - short-term debt pay fixed rate (millions of Canadian dollars) 2,960 394 47 35 30 90 3,556 Interest rate contracts - long-term debt pay fixed rate (millions of Canadian dollars) 2,060 1,980 1,328 — — — 5,368 Equity contracts (millions of Canadian dollars) 39 7 11 — — — 57 Commodity contracts - natural gas (billions of cubic feet) 2 133 38 14 4 11 — 200 Commodity contracts - crude oil (millions of barrels) 2 8 — — — — — 8 Commodity contracts - power (megawatt per hour) (MW/H) (14) (43) (43) (43) (43) — (39) 1 1 Total is an average net purchase/(sale) of power. 2 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 2021 2020 (millions of Canadian dollars) Unrealized gain/(loss) on derivative (3) 218 Unrealized loss on hedged item (4) (203) Realized loss on derivative (39) (12) Realized gain on hedged item 45 — 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 2021 2020 (millions of Canadian dollars) Amount of unrealized gain/(loss) recognized in OCI Cash flow hedges Foreign exchange contracts (20) 19 Interest rate contracts 497 (715) Commodity contracts (8) 9 Other contracts 3 (7) Fair value hedges Foreign exchange contracts (1) 3 Net investment hedges Foreign exchange contracts — (7) 471 (698) Amount of loss reclassified from AOCI to earnings Foreign exchange contracts 1 1 1 Interest rate contracts 2 63 43 Commodity contracts 1 — Other contracts 3 — — 65 44 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 $113 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 33 months as at March 31, 2021. 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 2021 2020 (millions of Canadian dollars) Foreign exchange contracts 1 236 (2,003) Interest rate contracts 2 2 (18) Commodity contracts 3 72 473 Other contracts 4 5 (8) Total unrealized derivative fair value gain/(loss), net 315 (1,556) 1 For the respective three months ended periods, reported within Transportation and other services revenues (2021 - $154 million gain; 2020 - $1,061 million loss) and Net foreign currency gain/(loss) (2021 - $82 million gain; 2020 - $942 million loss) 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 three months ended periods, reported within Transportation and other services revenues (2021 - $3 million loss; 2020 - $34 million gain), Commodity sales (2021 - $171 million gain; 2020 - $1,493 million gain), Commodity costs (2021 - $100 million loss; 2020 - $1,045 million loss) and Operating and administrative expense (2021 - $4 million gain; 2020 - $9 million loss) 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 US 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 March 31, 2021. 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: March 31, December 31, (millions of Canadian dollars) Canadian financial institutions 617 481 US financial institutions 188 99 European financial institutions — 28 Asian financial institutions 235 167 Other 1 118 97 1,158 872 1 Other is comprised of commodity clearing house and physical natural gas and crude oil counterparties. As at March 31, 2021, 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 March 31, 2021 and December 31, 2020. 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 utility's large and diversified customer base and the ability to recover an estimate for expected credit losses 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 utilize a loss allowance matrix which contemplates historical credit losses by age of receivables, adjusted for any forward-looking information and management expectations to measure lifetime expected credit losses of receivables. 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, NGL and natural gas contracts, basis swaps, commodity swaps, and power 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. These methods include discounted cash flows for forwards and swaps and Black-Scholes-Merton pricing models for options. 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: March 31, 2021 Level 1 Level 2 Level 3 Total Gross (millions of Canadian dollars) Financial assets Current derivative assets Foreign exchange contracts — 242 — 242 Commodity contracts 55 37 66 158 Other contracts — 2 — 2 55 281 66 402 Long-term derivative assets Foreign exchange contracts — 465 — 465 Interest rate contracts — 247 — 247 Commodity contracts 8 27 12 47 Other contracts — 2 — 2 8 741 12 761 Financial liabilities Current derivative liabilities Foreign exchange contracts — (249) — (249) Interest rate contracts — (240) — (240) Commodity contracts (55) (25) (145) (225) (55) (514) (145) (714) Long-term derivative liabilities Foreign exchange contracts — (543) — (543) Interest rate contracts — (102) — (102) Commodity contracts (11) (7) (52) (70) (11) (652) (52) (715) Total net financial assets/(liabilities) Foreign exchange contracts — (85) — (85) Interest rate contracts — (95) — (95) Commodity contracts (3) 32 (119) (90) Other contracts — 4 — 4 (3) (144) (119) (266) December 31, 2020 Level 1 Level 2 Level 3 Total Gross (millions of Canadian dollars) Financial assets Current derivative assets Foreign exchange contracts — 180 — 180 Commodity contracts 43 33 67 143 43 213 67 323 Long-term derivative assets Foreign exchange contracts — 466 — 466 Interest rate contracts — 56 — 56 Commodity contracts 1 24 14 39 1 546 14 561 Financial liabilities Current derivative liabilities Foreign exchange contracts — (185) — (185) Interest rate contracts — (425) — (425) Commodity contracts (39) (18) (223) (280) Other contracts — (4) — (4) (39) (632) (223) (894) Long-term derivative liabilities Foreign exchange contracts — (760) — (760) Interest rate contracts — (241) — (241) Commodity contracts (1) (8) (49) (58) (1) (1,009) (49) (1,059) Total net financial assets/(liabilities) Foreign exchange contracts — (299) — (299) Interest rate contracts — (610) — (610) Commodity contracts 4 31 (191) (156) Other contracts — (4) — (4) 4 (882) (191) (1,069) The significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments were as follows: March 31, 2021 Fair Unobservable Minimum Maximum Weighted Unit of (fair value in millions of Canadian dollars) Commodity contracts - financial 1 Natural gas (6) Forward gas price 2.70 4.11 3.21 $/mmbtu 2 Crude 2 Forward crude price 51.88 74.36 62.08 $/barrel Power (47) Forward power price 19.15 76.00 60.25 $/MW/H Commodity contracts - physical 1 Natural gas 11 Forward gas price 2.06 5.43 3.10 $/mmbtu 2 Crude (81) Forward crude price 53.92 76.25 55.05 $/barrel NGL 2 Forward NGL price 0.50 1.21 0.80 $/gallon (119) 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: Three months ended 2021 2020 (millions of Canadian dollars) Level 3 net derivative liability at beginning of period (191) (69) Total gain/(loss) Included in earnings 1 (72) 349 Included in OCI (5) 9 Settlements 149 39 Level 3 net derivative (liability)/asset at end of period (119) 328 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 March 31, 2021 or December 31, 2020. NET INVESTMENT HEDGES We currently have designated a portion of our US dollar denominated debt, as well as a portfolio of foreign exchange forward contracts in prior periods, as a hedge of our net investment in US dollar denominated investments and subsidiaries. During the three months ended March 31, 2021 and 2020, we recognized an unrealized foreign exchange gain of $105 million and a loss of $708 million, respectively, on the translation of US dollar denominated debt and unrealized loss of nil and $7 million, respectively, on the change in fair value of our outstanding foreign exchange forward contracts in OCI. During the three months ended March 31, 2021 and 2020, we recognized no OCI associated with the settlement of foreign exchange forward contracts or with the settlement of US dollar denominated debt that had matured during the period. 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 $52 million as at March 31, 2021 and December 31, 2020. We have Restricted long-term investments held in trust totaling $529 million and $553 million as at March 31, 2021 and December 31, 2020, 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 $567 million as at March 31, 2021 and December 31, 2020, 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 $567 million as at March 31, 2021 and December 31, 2020, respectively. As at March 31, 2021 and December 31, 2020, our long-term debt had a carrying value of $67.0 billion and $66.1 billion, respectively, before debt issuance costs and a fair value of $72.5 billion and $75.1 billion, respectively. We also 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 March 31, 2021 and December 31, 2020, the non-current notes receivable had a carrying value of $1.0 billion and $1.1 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.

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The effective income tax rates for the three months ended March 31, 2021 and 2020 were 19.3% and 28.7%, respectively. The period-over-period decrease in the effective income tax rates is due to the effect of rate-regulated accounting for income taxes and the benefit of foreign tax rate differentials relative to the change in earnings.

PENSION AND OTHER POSTRETIREMEN

PENSION AND OTHER POSTRETIREMENT BENEFITS	3 Months Ended
	Mar. 31, 2021
Retirement Benefits [Abstract]
PENSION AND OTHER POSTRETIREMENT BENEFITS	PENSION AND OTHER POSTRETIREMENT BENEFITS Three months ended 2021 2020 (millions of Canadian dollars) Service cost 48 42 Interest cost 32 33 Expected return on plan assets (84) (67) Amortization of actuarial loss and prior service costs 14 9 Net periodic benefit costs 10 17

CONTINGENCIES

CONTINGENCIES	3 Months Ended
	Mar. 31, 2021
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.

CHANGES IN ACCOUNTING POLICIES

CHANGES IN ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2021
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 For eligible hedging relationships existing as at January 1, 2021 and prospectively, we have applied the optional expedient in Accounting Standards Update (ASU) 2020-04 whereby the modification of the hedging instrument does not result in an automatic hedging relationship de-designation. The adoption of this ASU did not have a material impact on our consolidated financial statements. Clarifying Interaction between Equity Securities, Equity Method Investments and Derivatives Effective January 1, 2021, we adopted ASU 2020-01 on a prospective basis. The new standard was issued in January 2020 and clarifies that observable transactions should be considered for the purpose of applying the measurement alternative in accordance with Accounting Standards Codification (ASC) 321 Investments - Equity Securities 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 Derivatives and Hedging guidance only because, upon the contracts’ exercise, the equity securities could be accounted for under the equity method of accounting or fair value option. The adoption of this ASU did not have a material impact on our consolidated financial statements. Accounting for Income Taxes Effective January 1, 2021, we adopted ASU 2019-12 on a prospective basis. The new standard 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 Income Taxes as well as provides simplification by clarifying and amending existing guidance. The adoption of this ASU did not have a material impact on our consolidated financial statements. 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. We are currently assessing the impact of the new standard on our consolidated financial statements.

REVENUES (Tables)

REVENUES (Tables)	3 Months Ended
	Mar. 31, 2021
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 2,329 1,121 216 — — — 3,666 Storage and other revenues 26 74 58 — — — 158 Gas gathering and processing revenues — 7 — — — — 7 Gas distribution revenue — — 1,534 — — — 1,534 Electricity and transmission revenues — — — 76 — — 76 Total revenue from contracts with customers 2,355 1,202 1,808 76 — — 5,441 Commodity sales — — — — 6,429 — 6,429 Other revenues 1,2 212 12 6 91 — (4) 317 Intersegment revenues 132 — 9 — 4 (145) — Total revenues 2,699 1,214 1,823 167 6,433 (149) 12,187 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 2,440 1,255 215 — — — 3,910 Storage and other revenues 26 79 47 — — — 152 Gas gathering and processing revenues — 7 — — — — 7 Gas distribution revenues — — 1,417 — — — 1,417 Electricity and transmission revenues — — — 50 — — 50 Total revenue from contracts with customers 2,466 1,341 1,679 50 — — 5,536 Commodity sales — — — — 7,389 — 7,389 Other revenues 1,2 (1,017) 16 (1) 103 (7) (6) (912) Intersegment revenues 85 — 4 — 16 (105) — Total revenues 1,534 1,357 1,682 153 7,398 (111) 12,013 1 Includes mark-to-market gains/(losses) from our hedging program for the three months ended March 31, 2021 and 2020 of $130 million gain and $1,106 million loss, respectively. 2 Includes revenues from lease contracts for the three months ended March 31, 2021 and 2020 of $159 million and $158 million, respectively. Recognition and Measurement of Revenues Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation 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 2,355 1,202 1,791 76 5,424 Total revenue from contracts with customers 2,355 1,202 1,808 76 5,441 Liquids Pipelines Gas Transmission and Midstream Gas Distribution and Storage Renewable Power Generation 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 2,466 1,341 1,664 50 5,521 Total revenue from contracts with customers 2,466 1,341 1,679 50 5,536 1 Includes revenues from crude oil and natural gas pipeline transportation, storage, natural gas gathering, compression and treating, natural gas distribution, natural gas storage services and electricity sales.
Contract with customer, asset and liability	Contract Balances Contract Receivables Contract Assets Contract Liabilities (millions of Canadian dollars) Balance as at March 31, 2021 2,120 214 1,724 Balance as at December 31, 2020 2,042 226 1,815

SEGMENTED INFORMATION (Tables)

SEGMENTED INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2021
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 2,699 1,214 1,823 167 6,433 (149) 12,187 Commodity and gas distribution costs (3) — (958) — (6,353) 166 (7,148) Operating and administrative (819) (434) (272) (43) (14) 23 (1,559) Income from equity investments 154 182 22 37 — — 395 Other income/(expense) 8 11 19 (5) (2) 180 211 Earnings before interest, income taxes, and depreciation and amortization 2,039 973 634 156 64 220 4,086 Depreciation and amortization (932) Interest expense (657) Income tax expense (483) Earnings 2,014 Capital expenditures 1 1,195 482 219 5 — 12 1,913 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 1,534 1,357 1,682 153 7,398 (111) 12,013 Commodity and gas distribution costs (7) — (872) — (7,243) 104 (8,018) Operating and administrative (865) (507) (249) (50) (28) 99 (1,600) Income/(loss) from equity investments 197 (75) 23 16 2 — 163 Impairment of equity investments — (1,736) — — — — (1,736) Other income/(expense) (9) (93) 20 1 (8) (1,058) (1,147) Earnings/(loss) before interest, income taxes, and depreciation and amortization 850 (1,054) 604 120 121 (966) (325) Depreciation and amortization (882) Interest expense (706) Income tax recovery 549 Loss (1,364) Capital expenditures 1 500 391 222 23 — 22 1,158 1 Includes allowance for equity funds used during construction.

EARNINGS PER COMMON SHARE AND_2

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE (Tables)	3 Months Ended
	Mar. 31, 2021
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 2021 2020 (number of shares in millions) Weighted average shares outstanding 2,022 2,019 Effect of dilutive options 1 2 Diluted weighted average shares outstanding 2,023 2,021
Schedule of preferred stock characteristics by class	On May 4, 2021, our Board of Directors declared the following quarterly dividends. All dividends are payable on June 1, 2021 to shareholders of record on May 14, 2021. Dividend per share Common Shares 1 $0.83500 Preference Shares, Series A $0.34375 Preference Shares, Series B $0.21340 Preference Shares, Series C 2 $0.15501 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 $0.24613 Preference Shares, Series 13 $0.19019 Preference Shares, Series 15 $0.18644 Preference Shares, Series 17 $0.32188 Preference Shares, Series 19 $0.30625 1 The quarterly dividend per common share was increased 3% to $0.835 from $0.81, effective March 1, 2021.

DEBT (Tables)

DEBT (Tables)	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Schedule of credit facilities	The following table provides details of our committed credit facilities as at March 31, 2021: Maturity 1 Total Draws 2 Available (millions of Canadian dollars) Enbridge Inc. 2022-2024 9,159 7,390 1,769 Enbridge (U.S.) Inc. 2022-2024 6,913 3,351 3,562 Enbridge Pipelines Inc. 2022 3,000 1,358 1,642 Enbridge Gas Inc. 2022 2,000 1,094 906 Total committed credit facilities 21,072 13,193 7,879 1 Maturity date is inclusive of the one-year term out option for certain credit facilities. 2 Includes facility draws and commercial paper issuances that are back-stopped by credit facilities.
Schedule of long-term debt instruments	During the three months ended March 31, 2021, we completed the following long-term debt issuance totaling US$500 million: Company Issue Date Principal Amount (millions of Canadian dollars unless otherwise stated) Enbridge Inc. February 2021 Floating rate notes due February 2023 1 US$500 1 Notes mature in two years and carry an interest rate set to equal Secured Overnight Financing Rate (SOFR) plus a margin of 40 basis points.
Schedule of repayment of debt	During the three months ended March 31, 2021, we completed the following long-term debt repayments totaling $600 million and US$250 million: Company Repayment Date Principal Amount (millions of Canadian dollars unless otherwise stated) Enbridge Inc. February 2021 4.26% medium-term notes $200 March 2021 3.16% medium-term notes $400 Spectra Energy Partners, LP March 2021 4.60% senior notes US$250

COMPONENTS OF ACCUMULATED OTH_2

COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	3 Months Ended
	Mar. 31, 2021
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 three months ended March 31, 2021 and 2020 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, 2021 (1,326) 5 (215) 568 66 (499) (1,401) Other comprehensive income/(loss) retained in AOCI 493 (1) 105 (774) (26) — (203) Other comprehensive (income)/loss reclassified to earnings Interest rate contracts 1 63 — — — — — 63 Commodity contracts 2 1 — — — — — 1 Foreign exchange contracts 3 1 — — — — — 1 Amortization of pension and OPEB actuarial loss and prior service costs 4 — — — — — 7 7 Other 17 — — (20) 3 — — 575 (1) 105 (794) (23) 7 (131) Tax impact Income tax on amounts retained in AOCI (120) — (12) — 4 — (128) Income tax on amounts reclassified to earnings (13) — — — — (2) (15) (133) — (12) — 4 (2) (143) Balance as at March 31, 2021 (884) 4 (122) (226) 47 (494) (1,675) 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 (693) 3 (715) 5,459 (7) — 4,047 Other comprehensive loss reclassified to earnings Interest rate contracts 1 43 — — — — — 43 Foreign exchange contracts 3 1 — — — — — 1 Amortization of pension and OPEB actuarial loss and prior service costs 4 — — — — — 4 4 (649) 3 (715) 5,459 (7) 4 4,095 Tax impact Income tax on amounts retained in AOCI 182 — — — (3) — 179 Income tax on amounts reclassified to earnings (12) — — — — (1) (13) 170 — — — (3) (1) 166 Balance as at March 31, 2020 (1,552) 3 (1,032) 6,855 57 (342) 3,989 1 Reported within Interest expense in the Consolidated Statements of Earnings. 2 Reported within Transportation and other services revenues, 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 These components are included in the computation of net periodic benefit costs and are reported within Other income/(expense) in the Consolidated Statements of Earnings.

RISK MANAGEMENT AND FINANCIAL_2

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2021
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. March 31, 2021 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 — — 242 242 (36) 206 Commodity contracts — — 158 158 (93) 65 Other contracts 1 — 1 2 — 2 1 — 401 402 (129) 273 Deferred amounts and other assets Foreign exchange contracts — — 465 465 (211) 254 Interest rate contracts 247 — — 247 (26) 221 Commodity contracts — — 47 47 (14) 33 Other contracts 1 — 1 2 — 2 248 — 513 761 (251) 510 Accounts payable and other Foreign exchange contracts (10) (120) (119) (249) 36 (213) Interest rate contracts (240) — — (240) — (240) Commodity contracts (4) — (221) (225) 93 (132) (254) (120) (340) (714) 129 (585) Other long-term liabilities Foreign exchange contracts — — (543) (543) 211 (332) Interest rate contracts (79) — (23) (102) 26 (76) Commodity contracts (4) — (66) (70) 14 (56) (83) — (632) (715) 251 (464) Total net derivative assets/(liabilities) Foreign exchange contracts (10) (120) 45 (85) — (85) Interest rate contracts (72) — (23) (95) — (95) Commodity contracts (8) — (82) (90) — (90) Other contracts 2 — 2 4 — 4 (88) (120) (58) (266) — (266) December 31, 2020 Derivative Derivative Non- Total Gross Amounts Total Net (millions of Canadian dollars) Accounts receivable and other Foreign exchange contracts — — 180 180 (28) 152 Commodity contracts — — 143 143 (81) 62 — — 323 323 (109) 214 Deferred amounts and other assets Foreign exchange contracts 14 — 452 466 (218) 248 Interest rate contracts 56 — — 56 (25) 31 Commodity contracts — — 39 39 (9) 30 70 — 491 561 (252) 309 Accounts payable and other Foreign exchange contracts (5) (29) (151) (185) 28 (157) Interest rate contracts (423) — (2) (425) — (425) Commodity contracts (2) — (278) (280) 81 (199) Other contracts (1) — (3) (4) — (4) (431) (29) (434) (894) 109 (785) Other long-term liabilities Foreign exchange contracts — (87) (673) (760) 218 (542) Interest rate contracts (218) — (23) (241) 25 (216) Commodity contracts (1) — (57) (58) 9 (49) (219) (87) (753) (1,059) 252 (807) Total net derivative assets/(liabilities) Foreign exchange contracts 9 (116) (192) (299) — (299) Interest rate contracts (585) — (25) (610) — (610) Commodity contracts (3) — (153) (156) — (156) Other contracts (1) — (3) (4) — (4) (580) (116) (373) (1,069) — (1,069)
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. March 31, 2021 2021 2022 2023 2024 2025 Thereafter Total Foreign exchange contracts - US dollar forwards - purchase (millions of US dollars) 1,237 1,750 — — — — 2,987 Foreign exchange contracts - US dollar forwards - sell (millions of US dollars) 4,331 5,853 3,784 1,856 648 — 16,472 Foreign exchange contracts - British pound (GBP) forwards - sell (millions of GBP) 75 28 29 30 30 60 252 Foreign exchange contracts - Euro forwards - sell (millions of Euro) 85 94 92 91 86 428 876 Foreign exchange contracts - Japanese yen forwards - purchase (millions of yen) — 72,500 — — — — 72,500 Interest rate contracts - short-term debt pay fixed rate (millions of Canadian dollars) 2,960 394 47 35 30 90 3,556 Interest rate contracts - long-term debt pay fixed rate (millions of Canadian dollars) 2,060 1,980 1,328 — — — 5,368 Equity contracts (millions of Canadian dollars) 39 7 11 — — — 57 Commodity contracts - natural gas (billions of cubic feet) 2 133 38 14 4 11 — 200 Commodity contracts - crude oil (millions of barrels) 2 8 — — — — — 8 Commodity contracts - power (megawatt per hour) (MW/H) (14) (43) (43) (43) (43) — (39) 1 1 Total is an average net purchase/(sale) of power. 2 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 2021 2020 (millions of Canadian dollars) Unrealized gain/(loss) on derivative (3) 218 Unrealized loss on hedged item (4) (203) Realized loss on derivative (39) (12) Realized gain on hedged item 45 — 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 2021 2020 (millions of Canadian dollars) Amount of unrealized gain/(loss) recognized in OCI Cash flow hedges Foreign exchange contracts (20) 19 Interest rate contracts 497 (715) Commodity contracts (8) 9 Other contracts 3 (7) Fair value hedges Foreign exchange contracts (1) 3 Net investment hedges Foreign exchange contracts — (7) 471 (698) Amount of loss reclassified from AOCI to earnings Foreign exchange contracts 1 1 1 Interest rate contracts 2 63 43 Commodity contracts 1 — Other contracts 3 — — 65 44 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 2021 2020 (millions of Canadian dollars) Foreign exchange contracts 1 236 (2,003) Interest rate contracts 2 2 (18) Commodity contracts 3 72 473 Other contracts 4 5 (8) Total unrealized derivative fair value gain/(loss), net 315 (1,556) 1 For the respective three months ended periods, reported within Transportation and other services revenues (2021 - $154 million gain; 2020 - $1,061 million loss) and Net foreign currency gain/(loss) (2021 - $82 million gain; 2020 - $942 million loss) 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 three months ended periods, reported within Transportation and other services revenues (2021 - $3 million loss; 2020 - $34 million gain), Commodity sales (2021 - $171 million gain; 2020 - $1,493 million gain), Commodity costs (2021 - $100 million loss; 2020 - $1,045 million loss) and Operating and administrative expense (2021 - $4 million gain; 2020 - $9 million loss) 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: March 31, December 31, (millions of Canadian dollars) Canadian financial institutions 617 481 US financial institutions 188 99 European financial institutions — 28 Asian financial institutions 235 167 Other 1 118 97 1,158 872 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: March 31, 2021 Level 1 Level 2 Level 3 Total Gross (millions of Canadian dollars) Financial assets Current derivative assets Foreign exchange contracts — 242 — 242 Commodity contracts 55 37 66 158 Other contracts — 2 — 2 55 281 66 402 Long-term derivative assets Foreign exchange contracts — 465 — 465 Interest rate contracts — 247 — 247 Commodity contracts 8 27 12 47 Other contracts — 2 — 2 8 741 12 761 Financial liabilities Current derivative liabilities Foreign exchange contracts — (249) — (249) Interest rate contracts — (240) — (240) Commodity contracts (55) (25) (145) (225) (55) (514) (145) (714) Long-term derivative liabilities Foreign exchange contracts — (543) — (543) Interest rate contracts — (102) — (102) Commodity contracts (11) (7) (52) (70) (11) (652) (52) (715) Total net financial assets/(liabilities) Foreign exchange contracts — (85) — (85) Interest rate contracts — (95) — (95) Commodity contracts (3) 32 (119) (90) Other contracts — 4 — 4 (3) (144) (119) (266) December 31, 2020 Level 1 Level 2 Level 3 Total Gross (millions of Canadian dollars) Financial assets Current derivative assets Foreign exchange contracts — 180 — 180 Commodity contracts 43 33 67 143 43 213 67 323 Long-term derivative assets Foreign exchange contracts — 466 — 466 Interest rate contracts — 56 — 56 Commodity contracts 1 24 14 39 1 546 14 561 Financial liabilities Current derivative liabilities Foreign exchange contracts — (185) — (185) Interest rate contracts — (425) — (425) Commodity contracts (39) (18) (223) (280) Other contracts — (4) — (4) (39) (632) (223) (894) Long-term derivative liabilities Foreign exchange contracts — (760) — (760) Interest rate contracts — (241) — (241) Commodity contracts (1) (8) (49) (58) (1) (1,009) (49) (1,059) Total net financial assets/(liabilities) Foreign exchange contracts — (299) — (299) Interest rate contracts — (610) — (610) Commodity contracts 4 31 (191) (156) Other contracts — (4) — (4) 4 (882) (191) (1,069)
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: March 31, 2021 Fair Unobservable Minimum Maximum Weighted Unit of (fair value in millions of Canadian dollars) Commodity contracts - financial 1 Natural gas (6) Forward gas price 2.70 4.11 3.21 $/mmbtu 2 Crude 2 Forward crude price 51.88 74.36 62.08 $/barrel Power (47) Forward power price 19.15 76.00 60.25 $/MW/H Commodity contracts - physical 1 Natural gas 11 Forward gas price 2.06 5.43 3.10 $/mmbtu 2 Crude (81) Forward crude price 53.92 76.25 55.05 $/barrel NGL 2 Forward NGL price 0.50 1.21 0.80 $/gallon (119) 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: Three months ended 2021 2020 (millions of Canadian dollars) Level 3 net derivative liability at beginning of period (191) (69) Total gain/(loss) Included in earnings 1 (72) 349 Included in OCI (5) 9 Settlements 149 39 Level 3 net derivative (liability)/asset at end of period (119) 328 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)	3 Months Ended
	Mar. 31, 2021
Retirement Benefits [Abstract]
Schedule of net benefit costs recognized	Three months ended 2021 2020 (millions of Canadian dollars) Service cost 48 42 Interest cost 32 33 Expected return on plan assets (84) (67) Amortization of actuarial loss and prior service costs 14 9 Net periodic benefit costs 10 17

REVENUES - Disaggregation of Re

REVENUES - Disaggregation of Revenue (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 5,441	$ 5,536
Total revenues	12,187	12,013
Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	17	15
Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	5,424	5,521
Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	3,666	3,910
Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	158	152
Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	7	7
Gas distribution revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,534	1,417
Total revenues	1,540	1,416
Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	76	50
Commodity sales
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	6,429	7,389
Total revenues	6,429	7,389
Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	317	(912)
Liquids Pipelines
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,355	2,466
Liquids Pipelines | Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Liquids Pipelines | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,355	2,466
Gas Transmission and Midstream
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,202	1,341
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
Gas Transmission and Midstream | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,202	1,341
Gas Distribution and Storage
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,808	1,679
Gas Distribution and Storage | Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	17	15
Gas Distribution and Storage | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,791	1,664
Renewable Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	76	50
Renewable Power Generation | Revenues from products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Renewable Power Generation | Revenues from products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	76	50
Business segments | Liquids Pipelines
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,355	2,466
Total revenues	2,699	1,534
Business segments | Liquids Pipelines | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,329	2,440
Business segments | Liquids Pipelines | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	26	26
Business segments | Liquids Pipelines | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Liquids Pipelines | Gas distribution revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Liquids Pipelines | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Liquids Pipelines | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	0
Business segments | Liquids Pipelines | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	212	(1,017)
Business segments | Gas Transmission and Midstream
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,202	1,341
Total revenues	1,214	1,357
Business segments | Gas Transmission and Midstream | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,121	1,255
Business segments | Gas Transmission and Midstream | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	74	79
Business segments | Gas Transmission and Midstream | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	7	7
Business segments | Gas Transmission and Midstream | Gas distribution revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Gas Transmission and Midstream | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Gas Transmission and Midstream | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	0
Business segments | Gas Transmission and Midstream | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	12	16
Business segments | Gas Distribution and Storage
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,808	1,679
Total revenues	1,823	1,682
Business segments | Gas Distribution and Storage | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	216	215
Business segments | Gas Distribution and Storage | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	58	47
Business segments | Gas Distribution and Storage | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Gas Distribution and Storage | Gas distribution revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,534	1,417
Business segments | Gas Distribution and Storage | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Gas Distribution and Storage | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	0
Business segments | Gas Distribution and Storage | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	6	(1)
Business segments | Renewable Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	76	50
Total revenues	167	153
Business segments | Renewable Power Generation | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Renewable Power Generation | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Renewable Power Generation | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Renewable Power Generation | Gas distribution revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Renewable Power Generation | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	76	50
Business segments | Renewable Power Generation | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	0
Business segments | Renewable Power Generation | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	91	103
Business segments | Energy Services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Total revenues	6,433	7,398
Business segments | Energy Services | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Energy Services | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Energy Services | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Energy Services | Gas distribution revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Energy Services | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Business segments | Energy Services | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	6,429	7,389
Business segments | Energy Services | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	(7)
Eliminations and Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Total revenues	(149)	(111)
Eliminations and Other | Transportation revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Eliminations and Other | Storage and other revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Eliminations and Other | Gas gathering and processing revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Eliminations and Other | Gas distribution revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Eliminations and Other | Electricity and transmission revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0
Eliminations and Other | Commodity sales
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	0
Eliminations and Other | Other revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	(4)	(6)
Intersegment revenues
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	(145)	(105)
Total revenues	(149)	(111)
Intersegment revenues | Liquids Pipelines
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	132	85
Intersegment revenues | Gas Transmission and Midstream
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	0
Intersegment revenues | Gas Distribution and Storage
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	9	4
Intersegment revenues | Renewable Power Generation
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	0	0
Intersegment revenues | Energy Services
Disaggregation of Revenue [Line Items]
Revenue not from contract with customers	$ 4	$ 16

REVENUES - Narrative (Details)

REVENUES - Narrative (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Mark-to-market gains (losses) from hedging program	$ 130	$ (1,106)
Revenues from lease contracts	159	$ 158
Revenue recognized	145
Increase (decrease) in contract with customers, liability	69
Remaining performance obligation	57,400
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 5,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 5,700
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, period	1 year

REVENUES - Contract Balances (D

REVENUES - Contract Balances (Details) - CAD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract Receivables	$ 2,120	$ 2,042
Contract Assets	214	226
Contract Liabilities	$ 1,724	$ 1,815

SEGMENTED INFORMATION (Details)

SEGMENTED INFORMATION (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segmented Information
Revenues	$ 12,187	$ 12,013
Commodity and gas distribution costs	(7,148)	(8,018)
Operating and administrative	(1,559)	(1,600)
Income from equity investments	395	163
Impairment of equity investments	0	(1,736)
Other income/(expense)	211	(1,147)
Earnings/(loss) before interest, income taxes, and depreciation and amortization	4,086	(325)
Depreciation and amortization	(932)	(882)
Interest expense	(657)	(706)
Income tax expense	(483)	549
Earnings/(loss)	2,014	(1,364)
Capital expenditures	1,913	1,158
Intersegment Eliminations
Segmented Information
Revenues	(149)	(111)
Commodity and gas distribution costs	166	104
Operating and administrative	23	99
Income from equity investments	0	0
Impairment of equity investments		0
Other income/(expense)	180	(1,058)
Earnings/(loss) before interest, income taxes, and depreciation and amortization	220	(966)
Capital expenditures	12	22
Liquids Pipelines | Business segments
Segmented Information
Revenues	2,699	1,534
Commodity and gas distribution costs	(3)	(7)
Operating and administrative	(819)	(865)
Income from equity investments	154	197
Impairment of equity investments		0
Other income/(expense)	8	(9)
Earnings/(loss) before interest, income taxes, and depreciation and amortization	2,039	850
Capital expenditures	1,195	500
Gas Transmission and Midstream | Business segments
Segmented Information
Revenues	1,214	1,357
Commodity and gas distribution costs	0	0
Operating and administrative	(434)	(507)
Income from equity investments	182	(75)
Impairment of equity investments		(1,736)
Other income/(expense)	11	(93)
Earnings/(loss) before interest, income taxes, and depreciation and amortization	973	(1,054)
Capital expenditures	482	391
Gas Distribution and Storage | Business segments
Segmented Information
Revenues	1,823	1,682
Commodity and gas distribution costs	(958)	(872)
Operating and administrative	(272)	(249)
Income from equity investments	22	23
Impairment of equity investments		0
Other income/(expense)	19	20
Earnings/(loss) before interest, income taxes, and depreciation and amortization	634	604
Capital expenditures	219	222
Renewable Power Generation | Business segments
Segmented Information
Revenues	167	153
Commodity and gas distribution costs	0	0
Operating and administrative	(43)	(50)
Income from equity investments	37	16
Impairment of equity investments		0
Other income/(expense)	(5)	1
Earnings/(loss) before interest, income taxes, and depreciation and amortization	156	120
Capital expenditures	5	23
Energy Services | Business segments
Segmented Information
Revenues	6,433	7,398
Commodity and gas distribution costs	(6,353)	(7,243)
Operating and administrative	(14)	(28)
Income from equity investments	0	2
Impairment of equity investments		0
Other income/(expense)	(2)	(8)
Earnings/(loss) before interest, income taxes, and depreciation and amortization	64	121
Capital expenditures	$ 0	$ 0

EARNINGS PER COMMON SHARE AND_3

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Basic (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Prorata weighted average interest in entity's own common shares (in shares)	3	6

EARNINGS PER COMMON SHARE AND_4

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Diluted (Details) - $ / shares shares in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Weighted average number of common shares outstanding diluted
Weighted average common shares outstanding (in shares)	2,022	2,019
Effect of dilutive options (in shares)	1	2
Diluted weighted average common shares outstanding (in shares)	2,023	2,021
Stock options
Weighted average number of common shares outstanding diluted
Antidilutive securities excluded from the diluted earnings per common share calculation (in shares)	27.6	16.7
Weighted average exercise price of antidilutive securities (in Canadian dollars per share)	$ 51.42	$ 56.26

EARNINGS PER COMMON SHARE AND_5

EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Dividends Per Share (Details)	May 04, 2021$ / shares	May 04, 2021$ / shares	Mar. 01, 2021$ / shares	Feb. 28, 2021$ / shares
Dividends Payable [Line Items]
Common stock, dividends, per share, declared (in dollars per share)			$ 0.835	$ 0.81
Increase in quarterly dividend per common share (percent)			3.00%
Preferred share investment | Preference Shares, Series C
Dividends Payable [Line Items]
Dividend per share (in dollars per share)			$ 0.15501	$ 0.15349
Subsequent event | Common shares
Dividends Payable [Line Items]
Common stock, dividends, per share, declared (in dollars per share)	$ 0.83500
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)	0.15501
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

DEBT - Credit Facilities (Detai

DEBT - Credit Facilities (Details) - Committed credit facilities	Mar. 31, 2021CAD ($)
CREDIT FACILITIES
Total Facilities	$ 21,072,000,000
Draws	13,193,000,000
Available	7,879,000,000
Enbridge (U.S.) Inc.
CREDIT FACILITIES
Total Facilities	6,913,000,000
Draws	3,351,000,000
Available	3,562,000,000
Enbridge Pipelines Inc.
CREDIT FACILITIES
Total Facilities	3,000,000,000
Draws	1,358,000,000
Available	1,642,000,000
Enbridge Gas Inc.
CREDIT FACILITIES
Total Facilities	2,000,000,000
Draws	1,094,000,000
Available	906,000,000
Enbridge Inc.
CREDIT FACILITIES
Total Facilities	9,159,000,000
Draws	7,390,000,000
Available	$ 1,769,000,000

DEBT - Narrative (Details)

DEBT - Narrative (Details)	Feb. 25, 2021USD ($)debt_instrument	Feb. 10, 2021CAD ($)	Feb. 28, 2021USD ($)	Mar. 31, 2021CAD ($)	Mar. 31, 2021USD ($)	Mar. 31, 2020CAD ($)	Dec. 31, 2020CAD ($)	Mar. 31, 2021USD ($)
Line of Credit Facility [Line Items]
Principal Amount				$ 600,000,000	$ 250,000,000
Commitment fee percentage				0.20%	0.20%
Long-term debt				$ 62,688,000,000			$ 62,819,000,000
Principal amount of debt								$ 500,000,000
Long-term debt, fair value adjustment				726,000,000			750,000,000
Amortization of fair value adjustment				12,000,000		$ 15,000,000
Term Loan
Line of Credit Facility [Line Items]
Number of term loans repaid | debt_instrument	2
Principal Amount	$ 500,000,000
Commercial paper and credit facility draws
Line of Credit Facility [Line Items]
Long-term debt				10,600,000,000			9,900,000,000
Fixed-to-floating subordinated term notes | Subordinated term notes
Line of Credit Facility [Line Items]
Subordinated debt				7,700,000,000			7,700,000,000
Fixed-to-fixed subordinated term notes | Subordinated term notes
Line of Credit Facility [Line Items]
Subordinated debt				7,800,000,000			7,800,000,000
Floating rate notes due February 2023 | Enbridge Inc.
Line of Credit Facility [Line Items]
Term of debt instrument			2 years
Principal amount of debt			$ 500,000,000
Floating rate notes due February 2023 | SOFR | Enbridge Inc.
Line of Credit Facility [Line Items]
Spread on variable rate (percent)			0.40%
Committed credit facilities
Line of Credit Facility [Line Items]
Amount of credit facility				21,072,000,000
Unutilized amount of facility				$ 7,879,000,000
Committed credit facilities | Enbridge Inc.
Line of Credit Facility [Line Items]
Term out provision				1 year	1 year
Amount of credit facility				$ 9,159,000,000
Unutilized amount of facility				$ 1,769,000,000
Committed credit facilities | Enbridge Pipelines Inc.
Line of Credit Facility [Line Items]
Term out provision				1 year	1 year
Amount of credit facility				$ 3,000,000,000
Unutilized amount of facility				$ 1,642,000,000
Committed credit facilities | Enbridge Gas Inc.
Line of Credit Facility [Line Items]
Term out provision				1 year	1 year
Amount of credit facility				$ 2,000,000,000
Unutilized amount of facility				$ 906,000,000
Committed credit facilities | Enbridge (U.S.) Inc.
Line of Credit Facility [Line Items]
Term out provision				1 year	1 year
Amount of credit facility				$ 6,913,000,000
Unutilized amount of facility				3,562,000,000
Revolving credit facility | Sustainability-linked Credit Facility
Line of Credit Facility [Line Items]
Term of debt instrument		3 years
Amount of credit facility		$ 1,000,000,000
Revolving credit facility | Syndicated Credit Facility
Line of Credit Facility [Line Items]
Term of debt instrument		1 year
Credit facility terminated		$ 3,000,000,000
Uncommitted demand credit facilities
Line of Credit Facility [Line Items]
Amount of credit facility				845,000,000			849,000,000
Unutilized amount of facility				$ 595,000,000			$ 533,000,000

DEBT - Long Term Debt Issuance

DEBT - Long Term Debt Issuance (Details) - USD ($)	Mar. 31, 2021	Feb. 28, 2021
Debt Instrument [Line Items]
Principal Amount	$ 500,000,000
Floating rate notes due February 2023 | Enbridge Inc.
Debt Instrument [Line Items]
Principal Amount		$ 500,000,000

DEBT - Long Term Debt Repayment

DEBT - Long Term Debt Repayments (Details) $ in Millions, $ in Millions	1 Months Ended			3 Months Ended
	Mar. 31, 2021USD ($)	Mar. 31, 2021CAD ($)	Feb. 28, 2021CAD ($)	Mar. 31, 2021USD ($)	Mar. 31, 2021CAD ($)
DEBT
Principal Amount				$ 250	$ 600
Spectra Energy Partners, LP | 4.60% senior notes
DEBT
Principal Amount	$ 250
Interest rate (as a percent)			4.60%
Enbridge Inc. | 4.26% medium-term notes
DEBT
Principal Amount			$ 200
Interest rate (as a percent)			4.26%
Enbridge Inc. | 3.16% medium-term notes
DEBT
Principal Amount		$ 400
Interest rate (as a percent)			3.16%

COMPONENTS OF ACCUMULATED OTH_3

COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Changes in AOCI
Balance at the beginning of the period	$ 64,363
Other comprehensive income/(loss) retained in AOCI	(203)	$ 4,047
Total before tax impact	(131)	4,095
Income tax on amounts retained in AOCI	(128)	179
Income tax on amounts reclassified to earnings	(15)	(13)
Tax impact	(143)	166
Balance at the end of the period	65,988	72,291
Interest rate contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	63	43
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	1	1
Other contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	0
Total
Changes in AOCI
Balance at the beginning of the period	(1,401)	(272)
Balance at the end of the period	(1,675)	3,989
Cash Flow  Hedges
Changes in AOCI
Balance at the beginning of the period	(1,326)	(1,073)
Other comprehensive income/(loss) retained in AOCI	493	(693)
Total before tax impact	575	(649)
Income tax on amounts retained in AOCI	(120)	182
Income tax on amounts reclassified to earnings	(13)	(12)
Tax impact	(133)	170
Balance at the end of the period	(884)	(1,552)
Cash Flow  Hedges | Interest rate contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	63	43
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	1	1
Cash Flow  Hedges | Other contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	17
Excluded Components of Fair Value Hedges
Changes in AOCI
Balance at the beginning of the period	5	0
Other comprehensive income/(loss) retained in AOCI	(1)	3
Total before tax impact	(1)	3
Income tax on amounts retained in AOCI	0	0
Income tax on amounts reclassified to earnings	0	0
Tax impact	0	0
Balance at the end of the period	4	3
Net Investment Hedges
Changes in AOCI
Balance at the beginning of the period	(215)	(317)
Other comprehensive income/(loss) retained in AOCI	105	(715)
Total before tax impact	105	(715)
Income tax on amounts retained in AOCI	(12)	0
Income tax on amounts reclassified to earnings	0	0
Tax impact	(12)	0
Balance at the end of the period	(122)	(1,032)
Cumulative Translation Adjustment
Changes in AOCI
Balance at the beginning of the period	568	1,396
Other comprehensive income/(loss) retained in AOCI	(774)	5,459
Total before tax impact	(794)	5,459
Income tax on amounts retained in AOCI	0	0
Income tax on amounts reclassified to earnings	0	0
Tax impact	0	0
Balance at the end of the period	(226)	6,855
Cumulative Translation Adjustment | Other contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	(20)
Equity Investees
Changes in AOCI
Balance at the beginning of the period	66	67
Other comprehensive income/(loss) retained in AOCI	(26)	(7)
Total before tax impact	(23)	(7)
Income tax on amounts retained in AOCI	4	(3)
Income tax on amounts reclassified to earnings	0	0
Tax impact	4	(3)
Balance at the end of the period	47	57
Equity Investees | Other contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	3
Pension and OPEB Adjustment
Changes in AOCI
Balance at the beginning of the period	(499)	(345)
Other comprehensive (income)/loss reclassified to earnings	7	4
Total before tax impact	7	4
Income tax on amounts retained in AOCI	0	0
Income tax on amounts reclassified to earnings	(2)	(1)
Tax impact	(2)	(1)
Balance at the end of the period	(494)	$ (342)
Pension and OPEB Adjustment | Other contracts
Changes in AOCI
Other comprehensive (income)/loss reclassified to earnings	$ 0

IMPAIRMENT OF EQUITY INVESTME_2

IMPAIRMENT OF EQUITY INVESTMENTS (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Impairment loss on equity method investments	$ 0	$ 1,736
Loss from equity investments	$ (395)	(163)
DCP Midstream, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (percent)	50.00%
Impairment loss on equity method investments		1,700
Loss from equity investments		$ 324
Carrying value of investment	$ 328		$ 331

RISK MANAGEMENT AND FINANCIAL_3

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Market Risk (Details)	3 Months Ended
	Mar. 31, 2021equity_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%
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Number of forms of stock-based compensation with equity price risk	1
Interest Rate Contract For Long Term Borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Average swap rate, variable (as a percent)	2.40%

RISK MANAGEMENT AND FINANCIAL_4

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Total Derivative Instruments (Details) - CAD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	$ (266)	$ (1,069)
Derivative liabilities, Total Net Derivative Instruments	(266)	(1,069)
Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(58)	(373)
Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(88)	(580)
Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(120)	(116)
Accounts receivable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	402	323
Derivative assets, Amounts Available for Offset	(129)	(109)
Derivative assets, Total Net Derivative Instruments	273	214
Accounts receivable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	401	323
Accounts receivable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	1	0
Accounts receivable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	761	561
Derivative assets, Amounts Available for Offset	(251)	(252)
Derivative assets, Total Net Derivative Instruments	510	309
Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	513	491
Deferred amounts and other assets | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	248	70
Deferred amounts and other assets | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(714)	(894)
Derivative liabilities, Amounts Available for Offset	129	109
Derivative liabilities, Total Net Derivative Instruments	(585)	(785)
Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(340)	(434)
Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(254)	(431)
Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(120)	(29)
Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(715)	(1,059)
Derivative liabilities, Amounts Available for Offset	251	252
Derivative liabilities, Total Net Derivative Instruments	(464)	(807)
Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(632)	(753)
Other long-term liabilities | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(83)	(219)
Other long-term liabilities | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	(87)
Foreign exchange contracts
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(85)	(299)
Derivative liabilities, Total Net Derivative Instruments	(85)	(299)
Foreign exchange contracts | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	45	(192)
Foreign exchange contracts | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(10)	9
Foreign exchange contracts | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(120)	(116)
Foreign exchange contracts | Accounts receivable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	242	180
Derivative assets, Amounts Available for Offset	(36)	(28)
Derivative assets, Total Net Derivative Instruments	206	152
Foreign exchange contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	242	180
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 | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Foreign exchange contracts | Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	465	466
Derivative assets, Amounts Available for Offset	(211)	(218)
Derivative assets, Total Net Derivative Instruments	254	248
Foreign exchange contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	465	452
Foreign exchange contracts | Deferred amounts and other assets | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	14
Foreign exchange contracts | Deferred amounts and other assets | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Foreign exchange contracts | Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(249)	(185)
Derivative liabilities, Amounts Available for Offset	36	28
Derivative liabilities, Total Net Derivative Instruments	(213)	(157)
Foreign exchange contracts | Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(119)	(151)
Foreign exchange contracts | Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(10)	(5)
Foreign exchange contracts | Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(120)	(29)
Foreign exchange contracts | Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(543)	(760)
Derivative liabilities, Amounts Available for Offset	211	218
Derivative liabilities, Total Net Derivative Instruments	(332)	(542)
Foreign exchange contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(543)	(673)
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 | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	(87)
Interest rate contracts
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(95)	(610)
Derivative liabilities, Total Net Derivative Instruments	(95)	(610)
Interest rate contracts | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(23)	(25)
Interest rate contracts | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(72)	(585)
Interest rate contracts | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0	0
Interest rate contracts | Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	247	56
Derivative assets, Amounts Available for Offset	(26)	(25)
Derivative assets, Total Net Derivative Instruments	221	31
Interest rate contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Interest rate contracts | Deferred amounts and other assets | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	247	56
Interest rate contracts | Deferred amounts and other assets | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0	0
Interest rate contracts | Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(240)	(425)
Derivative liabilities, Amounts Available for Offset	0	0
Derivative liabilities, Total Net Derivative Instruments	(240)	(425)
Interest rate contracts | Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	(2)
Interest rate contracts | Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(240)	(423)
Interest rate contracts | Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Interest rate contracts | Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(102)	(241)
Derivative liabilities, Amounts Available for Offset	26	25
Derivative liabilities, Total Net Derivative Instruments	(76)	(216)
Interest rate contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(23)	(23)
Interest rate contracts | Other long-term liabilities | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(79)	(218)
Interest rate contracts | Other long-term liabilities | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Commodity contracts
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(90)	(156)
Derivative liabilities, Total Net Derivative Instruments	(90)	(156)
Commodity contracts | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(82)	(153)
Commodity contracts | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	(8)	(3)
Commodity contracts | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0	0
Commodity contracts | Accounts receivable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	158	143
Derivative assets, Amounts Available for Offset	(93)	(81)
Derivative assets, Total Net Derivative Instruments	65	62
Commodity contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	158	143
Commodity contracts | Accounts receivable and other | Cash Flow 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	0
Commodity contracts | Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	47	39
Derivative assets, Amounts Available for Offset	(14)	(9)
Derivative assets, Total Net Derivative Instruments	33	30
Commodity contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	47	39
Commodity contracts | Deferred amounts and other assets | Cash Flow 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	0
Commodity contracts | Accounts payable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(225)	(280)
Derivative liabilities, Amounts Available for Offset	93	81
Derivative liabilities, Total Net Derivative Instruments	(132)	(199)
Commodity contracts | Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(221)	(278)
Commodity contracts | Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(4)	(2)
Commodity contracts | Accounts payable and other | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Commodity contracts | Other long-term liabilities
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(70)	(58)
Derivative liabilities, Amounts Available for Offset	14	9
Derivative liabilities, Total Net Derivative Instruments	(56)	(49)
Commodity contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(66)	(57)
Commodity contracts | Other long-term liabilities | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	(4)	(1)
Commodity contracts | Other long-term liabilities | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities	0	0
Other contracts
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	4	(4)
Derivative liabilities, Total Net Derivative Instruments	4	(4)
Other contracts | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	2	(3)
Other contracts | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	2	(1)
Other contracts | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Total net derivative asset/(liability)	0	0
Other contracts | Accounts receivable and other
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	2
Derivative assets, Amounts Available for Offset	0
Derivative assets, Total Net Derivative Instruments	2
Other contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	1
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 | Fair Value Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	0
Other contracts | Deferred amounts and other assets
TOTAL DERIVATIVE INSTRUMENTS
Derivative assets	2
Derivative assets, Amounts Available for Offset	0
Derivative assets, Total Net Derivative Instruments	2
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	1
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		(4)
Derivative liabilities, Amounts Available for Offset		0
Derivative liabilities, Total Net Derivative Instruments		(4)
Other contracts | Accounts payable and other | Non-Qualifying Derivative Instruments
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities		(3)
Other contracts | Accounts payable and other | Cash Flow Hedges | Designated as hedging instrument
TOTAL DERIVATIVE INSTRUMENTS
Derivative liabilities		(1)
Other contracts | Accounts payable and other | 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) - Mar. 31, 2021 € in Millions, ¥ in Millions, £ in Millions, $ in Millions, $ in Millions	USD ($)MWhMMBblsBcf	GBP (£)MWhMMBblsBcf	EUR (€)MWhMMBblsBcf	JPY (¥)MWhMMBblsBcf	CAD ($)MWhMMBblsBcf
Foreign exchange contracts - forwards - purchase | United States dollar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020	$ 1,237
2021	1,750
2022	0
2023	0
2024	0
Thereafter	0
Derivative Notional Amount Outstanding	2,987
Foreign exchange contracts - forwards - purchase | Japanese yen
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 | ¥				¥ 0
2021 | ¥				72,500
2022 | ¥				0
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	4,331
2021	5,853
2022	3,784
2023	1,856
2024	648
Thereafter	0
Derivative Notional Amount Outstanding	$ 16,472
Foreign exchange contracts - forwards - sell | GBP
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 | £		£ 75
2021 | £		28
2022 | £		29
2023 | £		30
2024 | £		30
Thereafter | £		60
Derivative Notional Amount Outstanding | £		£ 252
Foreign exchange contracts - forwards - sell | Euro
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 | €			€ 85
2021 | €			94
2022 | €			92
2023 | €			91
2024 | €			86
Thereafter | €			428
Derivative Notional Amount Outstanding | €			€ 876
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020					$ 2,960
2021					394
2022					47
2023					35
2024					30
Thereafter					90
Derivative Notional Amount Outstanding					3,556
Interest rate contracts - long-term debt pay fixed rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020					2,060
2021					1,980
2022					1,328
2023					0
2024					0
Thereafter					0
Derivative Notional Amount Outstanding					5,368
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020					39
2021					7
2022					11
2023					0
2024					0
Thereafter					0
Derivative Notional Amount Outstanding					$ 57
Commodity contracts | Natural gas
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2021 (bcf/mmbbls) | Bcf	133	133	133	133	133
2022 (bcf/mmbbls) | Bcf	38	38	38	38	38
2023 (bcf/mmbbls) | Bcf	14	14	14	14	14
2024 (bcf/mmbbls) | Bcf	4	4	4	4	4
2025 (bcf/mmbbls) | Bcf	11	11	11	11	11
Thereafter (bcf/mmbbls) | Bcf	0	0	0	0	0
Derivative Nonmonetary Notional Amount Outstanding | Bcf	200	200	200	200	200
Commodity contracts | Crude oil
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2021 (bcf/mmbbls) | MMBbls	8	8	8	8	8
2022 (bcf/mmbbls) | MMBbls	0	0	0	0	0
2023 (bcf/mmbbls) | MMBbls	0	0	0	0	0
2024 (bcf/mmbbls) | MMBbls	0	0	0	0	0
2025 (bcf/mmbbls) | MMBbls	0	0	0	0	0
Thereafter (bcf/mmbbls) | MMBbls	0	0	0	0	0
Derivative Nonmonetary Notional Amount Outstanding | MMBbls	8	8	8	8	8
Net purchase | Commodity contracts | Power
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2021 (MWH) | MWh	(14)	(14)	(14)	(14)	(14)
Net sell | Commodity contracts | Power
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 (MWH) | MWh	(43)	(43)	(43)	(43)	(43)
2023 (MWH) | MWh	(43)	(43)	(43)	(43)	(43)
2024 (MWH) | MWh	(43)	(43)	(43)	(43)	(43)
2025 (MWH) | MWh	(43)	(43)	(43)	(43)	(43)
Thereafter (MWH) | MWh	0	0	0	0	0
Total (MWH) | MWh	(39)	(39)	(39)	(39)	(39)

RISK MANAGEMENT AND FINANCIAL_6

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Fair Value Derivatives (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Foreign Currency Fair Value Hedge Derivative [Line Items]
Realized loss on derivative	$ 130	$ (1,106)
Fair Value Hedges
Foreign Currency Fair Value Hedge Derivative [Line Items]
Unrealized gain/(loss) on derivative	(3)	218
Unrealized loss on hedged item	(4)	(203)
Fair Value Hedges | Interest rate contracts
Foreign Currency Fair Value Hedge Derivative [Line Items]
Realized loss on derivative	(39)	(12)
Realized gain on hedged item	$ 45	$ 0

RISK MANAGEMENT AND FINANCIAL_7

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Earnings and Comprehensive Income (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of unrealized gain/(loss) recognized in OCI	$ 471	$ (698)
Excluded components of fair value hedges	(1)	3
Amount of loss reclassified from AOCI to earnings	65	44
Estimated gain (loss) of AOCI related to cash flow hedges reclassified to earnings in the next 12 months	$ (113)
Maximum term of hedging exposures to variability of cash flows	33 months
Unrealized gain (loss) on derivatives	$ 315	(1,556)
Non-Qualifying Derivative Instruments
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives	315	(1,556)
Foreign exchange contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of loss reclassified from AOCI to earnings	1	1
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	236	(2,003)
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	154	(1,061)
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	82	(942)
Interest rate contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of loss reclassified from AOCI to earnings	63	43
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	2	(18)
Commodity contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of loss reclassified from AOCI to earnings	1	0
Commodity contracts | Non-Qualifying Derivative Instruments
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives	72	473
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	(3)	34
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	171	1,493
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	(100)	(1,045)
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	4	(9)
Other contracts
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Amount of loss reclassified from AOCI to earnings	0	0
Other contracts | Non-Qualifying Derivative Instruments
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Unrealized gain (loss) on derivatives	5	(8)
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	(20)	19
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	497	(715)
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	(8)	9
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	3	(7)
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)	3
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	$ 0	$ (7)

RISK MANAGEMENT AND FINANCIAL_8

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Liquidity and Credit Risk (Details) - CAD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
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
Derivative instruments
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	1,158,000,000	$ 872,000,000
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	617,000,000	481,000,000
Derivative instruments | US financial institutions
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	188,000,000	99,000,000
Derivative instruments | European financial institutions
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	0	28,000,000
Derivative instruments | Asian financial institutions
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	235,000,000	167,000,000
Derivative instruments | Other
LIQUIDITY RISK AND CREDIT RISK
Maximum credit exposure with respect to derivative instruments	$ 118,000,000	$ 97,000,000

RISK MANAGEMENT AND FINANCIAL_9

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Fair Value of Derivatives (Details) - CAD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value of Derivatives
Total net derivative asset/(liability)	$ (266)	$ (1,069)
Foreign exchange contracts
Fair Value of Derivatives
Total net derivative asset/(liability)	(85)	(299)
Interest rate contracts
Fair Value of Derivatives
Total net derivative asset/(liability)	(95)	(610)
Commodity contracts
Fair Value of Derivatives
Total net derivative asset/(liability)	(90)	(156)
Other contracts
Fair Value of Derivatives
Total net derivative asset/(liability)	4	(4)
Recurring basis
Fair Value of Derivatives
Current derivative assets	402	323
Long-term derivative assets	761	561
Current derivative liabilities	(714)	(894)
Long-term derivative liabilities	(715)	(1,059)
Total net derivative asset/(liability)	(266)	(1,069)
Recurring basis | Foreign exchange contracts
Fair Value of Derivatives
Current derivative assets	242	180
Long-term derivative assets	465	466
Current derivative liabilities	(249)	(185)
Long-term derivative liabilities	(543)	(760)
Total net derivative asset/(liability)	(85)	(299)
Recurring basis | Interest rate contracts
Fair Value of Derivatives
Long-term derivative assets	247	56
Current derivative liabilities	(240)	(425)
Long-term derivative liabilities	(102)	(241)
Total net derivative asset/(liability)	(95)	(610)
Recurring basis | Commodity contracts
Fair Value of Derivatives
Current derivative assets	158	143
Long-term derivative assets	47	39
Current derivative liabilities	(225)	(280)
Long-term derivative liabilities	(70)	(58)
Total net derivative asset/(liability)	(90)	(156)
Recurring basis | Other contracts
Fair Value of Derivatives
Current derivative assets	2
Long-term derivative assets	2
Current derivative liabilities		(4)
Total net derivative asset/(liability)	4	(4)
Level 1 | Recurring basis
Fair Value of Derivatives
Current derivative assets	55	43
Long-term derivative assets	8	1
Current derivative liabilities	(55)	(39)
Long-term derivative liabilities	(11)	(1)
Total net derivative asset/(liability)	(3)	4
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
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 | Commodity contracts
Fair Value of Derivatives
Current derivative assets	55	43
Long-term derivative assets	8	1
Current derivative liabilities	(55)	(39)
Long-term derivative liabilities	(11)	(1)
Total net derivative asset/(liability)	(3)	4
Level 1 | Recurring basis | Other contracts
Fair Value of Derivatives
Current derivative assets	0
Long-term derivative assets	0
Current derivative liabilities		0
Total net derivative asset/(liability)	0	0
Level 2 | Recurring basis
Fair Value of Derivatives
Current derivative assets	281	213
Long-term derivative assets	741	546
Current derivative liabilities	(514)	(632)
Long-term derivative liabilities	(652)	(1,009)
Total net derivative asset/(liability)	(144)	(882)
Level 2 | Recurring basis | Foreign exchange contracts
Fair Value of Derivatives
Current derivative assets	242	180
Long-term derivative assets	465	466
Current derivative liabilities	(249)	(185)
Long-term derivative liabilities	(543)	(760)
Total net derivative asset/(liability)	(85)	(299)
Level 2 | Recurring basis | Interest rate contracts
Fair Value of Derivatives
Long-term derivative assets	247	56
Current derivative liabilities	(240)	(425)
Long-term derivative liabilities	(102)	(241)
Total net derivative asset/(liability)	(95)	(610)
Level 2 | Recurring basis | Commodity contracts
Fair Value of Derivatives
Current derivative assets	37	33
Long-term derivative assets	27	24
Current derivative liabilities	(25)	(18)
Long-term derivative liabilities	(7)	(8)
Total net derivative asset/(liability)	32	31
Level 2 | Recurring basis | Other contracts
Fair Value of Derivatives
Current derivative assets	2
Long-term derivative assets	2
Current derivative liabilities		(4)
Total net derivative asset/(liability)	4	(4)
Level 3 | Recurring basis
Fair Value of Derivatives
Current derivative assets	66	67
Long-term derivative assets	12	14
Current derivative liabilities	(145)	(223)
Long-term derivative liabilities	(52)	(49)
Total net derivative asset/(liability)	(119)	(191)
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
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 | Commodity contracts
Fair Value of Derivatives
Current derivative assets	66	67
Long-term derivative assets	12	14
Current derivative liabilities	(145)	(223)
Long-term derivative liabilities	(52)	(49)
Total net derivative asset/(liability)	(119)	(191)
Level 3 | Recurring basis | Other contracts
Fair Value of Derivatives
Current derivative assets	0
Long-term derivative assets	0
Current 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	Mar. 31, 2021CAD ($)$ / MillionsofBTU-MMBTU$ / bbl$ / Gallon-gal$ / MWh	Dec. 31, 2020CAD ($)
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	$ (266)	$ (1,069)
Recurring basis
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	(266)	(1,069)
Level 3 | Recurring basis
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments
Fair Value	$ (119)	$ (191)
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	2.70
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	4.11
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	3.21
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	51.88
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	74.36
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	62.08
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	19.15
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	76
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	60.25
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	2.06
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	5.43
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	3.10
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	53.92
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	76.25
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	55.05
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	0.50
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	1.21
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	0.80
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	$ (6)
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	2
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	(47)
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	11
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	(81)
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	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Changes in net fair value of derivative assets and liabilities classified as Level 3
Level 3 net derivative liability at beginning of period	$ (191)	$ (69)
Total gain/(loss)
Included in earnings	(72)	349
Included in OCI	(5)	9
Settlements	149	39
Level 3 net derivative (liability)/asset at end of period	$ (119)	$ 328

RISK MANAGEMENT AND FINANCIA_12

RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Other Financial Instruments (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Fair Value of Other Financial Instruments
FMVA investments	$ 52		$ 52
Long-term debt, carrying value	67,000		66,100
Long-term debt	72,500		75,100
Net Investment Hedges
Fair Value of Other Financial Instruments
Unrealized foreign exchange gain (loss) on translation of United States dollar denominated debt	105	$ (708)
Unrealized gain (loss) on change in fair value of outstanding forward exchange forward contracts	0	$ (7)
Preferred share investment
Fair Value of Other Financial Instruments
Held to maturity investment at amortized cost	$ 566		567
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		567
Fair Value
Fair Value of Other Financial Instruments
Restricted long-term investments held in trust	529		553
Carrying value
Fair Value of Other Financial Instruments
Noncurrent notes receivable	$ 1,000		$ 1,100

INCOME TAXES (Details)

INCOME TAXES (Details)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Effective income tax rate (as a percent)	19.30%	28.70%

PENSION AND OTHER POSTRETIREM_3

PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 48	$ 42
Interest cost	32	33
Expected return on plan assets	(84)	(67)
Amortization of actuarial loss and prior service costs	14	9
Net periodic benefit costs	$ 10	$ 17

Uncategorized Items - enb-20210

Label	Element	Value
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201613Member