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	Adjustment 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			17	(18)
Stock-based compensation				19
Change in reciprocal interest				12			4
Other				7
Earnings attributable to controlling interests	$ 408				408
Preference share dividends					(190)
Dividends paid to reciprocal shareholder					10
Common share dividends declared					(1,641)
Other					(4)				0
Other comprehensive income/(loss) attributable to common shareholders, net of tax						2,025
Earnings attributable to noncontrolling interests									5
Change in unrealized loss on cash flow hedges									(3)
Foreign currency translation adjustments									93
Contributions									20
Distributions									(164)
Balance at the end of the period at Jun. 30, 2020	$ 69,941	7,747	64,763	207	(7,797)	1,753	(47)	$ 66,626	3,315
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 1.620
Balance at the beginning of the period at Mar. 31, 2020		7,747	64,760	202	(7,808)	3,989	(47)		3,448
Increase (Decrease) in Stockholders' Equity
Options exercised			3	(2)
Stock-based compensation				5
Change in reciprocal interest	$ 0						0
Other				2
Earnings attributable to controlling interests	1,741				1,741
Preference share dividends					(94)
Dividends paid to reciprocal shareholder					5
Common share dividends declared					(1,641)
Other					0				0
Other comprehensive income/(loss) attributable to common shareholders, net of tax						(2,236)
Earnings attributable to noncontrolling interests									36
Change in unrealized loss on cash flow hedges									(1)
Foreign currency translation adjustments									(85)
Contributions									5
Distributions									(88)
Balance at the end of the period at Jun. 30, 2020	$ 69,941	7,747	64,763	207	(7,797)	1,753	(47)	66,626	3,315
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			12	(8)
Stock-based compensation				16
Change in reciprocal interest				39			12
Other				0
Earnings attributable to controlling interests	3,476				3,476
Preference share dividends					(182)
Dividends paid to reciprocal shareholder					5
Common share dividends declared					(1,692)
Other					0				2
Other comprehensive income/(loss) attributable to common shareholders, net of tax						(1,019)
Earnings attributable to noncontrolling interests									59
Change in unrealized loss on cash flow hedges									(6)
Foreign currency translation adjustments									(47)
Contributions									9
Distributions									(143)
Balance at the end of the period at Jun. 30, 2021	$ 64,896	7,747	64,780	324	(8,388)	(2,420)	(17)	62,026	2,870
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 1.670
Balance at the beginning of the period at Mar. 31, 2021		7,747	64,772	324	(8,093)	(1,675)	(17)		2,930
Increase (Decrease) in Stockholders' Equity
Options exercised			8	(5)
Stock-based compensation				5
Change in reciprocal interest				0			0
Other				0
Earnings attributable to controlling interests	$ 1,484				1,484
Preference share dividends					(90)
Dividends paid to reciprocal shareholder					2
Common share dividends declared					(1,692)
Other					1				2
Other comprehensive income/(loss) attributable to common shareholders, net of tax						(745)
Earnings attributable to noncontrolling interests									37
Change in unrealized loss on cash flow hedges									(3)
Foreign currency translation adjustments									(25)
Contributions									6
Distributions									(77)
Balance at the end of the period at Jun. 30, 2021	$ 64,896	$ 7,747	$ 64,780	$ 324	$ (8,388)	$ (2,420)	$ (17)	$ 62,026	$ 2,870
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.835