CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD ($) $ in Millions	Total	Preference shares	Common shares	Additional paid-in capital	Deficit	Accumulated other comprehensive income (loss)	Reciprocal shareholding	Total Enbridge Inc. shareholders’ equity	Noncontrolling interests	Adoption of ASU 2016-13 Financial Instruments - Credit Losses Deficit
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			18	(19)
Stock-based compensation				25
Change in reciprocal interest				66			22
Other				6
Earnings attributable to controlling interests	$ 1,492				1,492
Preference share dividends					(284)
Dividends paid to reciprocal shareholder					14
Common share dividends declared					(3,281)
Other					(3)				(1)
Other comprehensive income/(loss) attributable to common shareholders, net of tax						1,171
Earnings attributable to noncontrolling interests									25
Change in unrealized loss on cash flow hedges									(3)
Foreign currency translation adjustments									57
Contributions									21
Distributions									(232)
Redemption of preferred shares held by subsidiary									0
Balance at the end of the period at Sep. 30, 2020	$ 68,435	7,747	64,764	265	(8,442)	899	(29)	$ 65,204	3,231
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 2.430
Balance at the beginning of the period at Jun. 30, 2020		7,747	64,763	207	(7,797)	1,753	(47)		3,315
Increase (Decrease) in Stockholders' Equity
Options exercised			1	(1)
Stock-based compensation				6
Change in reciprocal interest	$ 54						18
Other				(1)
Earnings attributable to controlling interests	1,084				1,084
Preference share dividends					(94)
Dividends paid to reciprocal shareholder					4
Common share dividends declared					(1,640)
Other					1				(1)
Other comprehensive income/(loss) attributable to common shareholders, net of tax						(854)
Earnings attributable to noncontrolling interests									20
Change in unrealized loss on cash flow hedges									0
Foreign currency translation adjustments									(36)
Contributions									1
Distributions									(68)
Redemption of preferred shares held by subsidiary									0
Balance at the end of the period at Sep. 30, 2020	$ 68,435	7,747	64,764	265	(8,442)	899	(29)	65,204	3,231
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.810
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
Increase (Decrease) in Stockholders' Equity
Options exercised			22	(15)
Stock-based compensation				23
Change in reciprocal interest				39			12
Other				0
Earnings attributable to controlling interests	4,256				4,256
Preference share dividends					(280)
Dividends paid to reciprocal shareholder					6
Common share dividends declared					(3,384)
Other					0				1
Other comprehensive income/(loss) attributable to common shareholders, net of tax						41
Earnings attributable to noncontrolling interests									93
Change in unrealized loss on cash flow hedges									(15)
Foreign currency translation adjustments									(10)
Contributions									13
Distributions									(210)
Redemption of preferred shares held by subsidiary									(293)
Balance at the end of the period at Sep. 30, 2021	$ 64,662	7,747	64,790	324	(9,397)	(1,360)	(17)	62,087	2,575
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 2.505
Balance at the beginning of the period at Jun. 30, 2021		7,747	64,780	324	(8,388)	(2,420)	(17)		2,870
Increase (Decrease) in Stockholders' Equity
Options exercised			10	(7)
Stock-based compensation				7
Change in reciprocal interest				0			0
Other				0
Earnings attributable to controlling interests	$ 780				780
Preference share dividends					(98)
Dividends paid to reciprocal shareholder					1
Common share dividends declared					(1,692)
Other					0				(1)
Other comprehensive income/(loss) attributable to common shareholders, net of tax						1,060
Earnings attributable to noncontrolling interests									34
Change in unrealized loss on cash flow hedges									(9)
Foreign currency translation adjustments									37
Contributions									4
Distributions									(67)
Redemption of preferred shares held by subsidiary									(293)
Balance at the end of the period at Sep. 30, 2021	$ 64,662	$ 7,747	$ 64,790	$ 324	$ (9,397)	$ (1,360)	$ (17)	$ 62,087	$ 2,575
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.835