CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD ($) $ in Millions	Total	Preferred share investment	Common shares	Additional paid-in capital	Retained earnings/(deficit)	Accumulated other comprehensive income	Reciprocal shareholding	Total Enbridge Inc. shareholders' equity	Noncontrolling interests
Balance at the beginning of the period at Dec. 31, 2017		$ 7,747	$ 50,737	$ 3,194	$ (2,468)	$ (973)	$ (102)		$ 7,597
Increase (Decrease) in Stockholders' Equity
Dividend Reinvestment and Share Purchase Plan			790
Options exercised			21	(10)
Stock-based compensation				34
Dilution gain on Spectra Energy Partners, LP restructuring				1,136
Other				(43)
Earnings attributable to controlling interests	$ 1,694				1,694
Preference share dividends					(178)
Dividends paid to reciprocal shareholder					17
Common share dividends declared					(1,145)
Redemption value adjustment attributable to redeemable noncontrolling interests					(483)
Other									14
Other comprehensive income/(loss) attributable to common shareholders, net of tax						2,250
Earnings/(loss) attributable to noncontrolling interests									129
Change in unrealized gain/(loss) on cash flow hedges									6
Foreign currency translation adjustments									229
Reclassification to earnings of loss on cash flow hedges									15
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax									250
Comprehensive income/(loss) attributable to noncontrolling interests									379
Spectra Energy Partners, LP restructuring									(1,486)
Contributions									21
Distributions									(425)
Balance at the end of the period at Jun. 30, 2018	$ 68,232	7,747	51,548	4,311	(2,649)	1,277	(102)	$ 62,132	6,100
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 1.342
Earnings per common share attributable to common shareholders (Note 5) (in Canadian dollars per share)	0.90
Diluted earnings per common share attributable to common shareholders (Note 5) (in Canadian dollars per share)	$ 0.90
Balance at the beginning of the period at Mar. 31, 2018		7,747	51,127	4,313	(1,982)	329	(102)		6,082
Increase (Decrease) in Stockholders' Equity
Dividend Reinvestment and Share Purchase Plan			416
Options exercised			5	(4)
Stock-based compensation				17
Other				(15)
Earnings attributable to controlling interests	$ 1,160				1,160
Preference share dividends					(89)
Dividends paid to reciprocal shareholder					10
Common share dividends declared					(1,145)
Redemption value adjustment attributable to redeemable noncontrolling interests					(603)
Other									29
Other comprehensive income/(loss) attributable to common shareholders, net of tax						948
Earnings/(loss) attributable to noncontrolling interests									106
Change in unrealized gain/(loss) on cash flow hedges									2
Foreign currency translation adjustments									77
Reclassification to earnings of loss on cash flow hedges									7
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax									86
Comprehensive income/(loss) attributable to noncontrolling interests									192
Contributions									13
Distributions									(216)
Balance at the end of the period at Jun. 30, 2018	$ 68,232	7,747	51,548	4,311	(2,649)	1,277	(102)	62,132	6,100
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.671
Earnings per common share attributable to common shareholders (Note 5) (in Canadian dollars per share)	0.63
Diluted earnings per common share attributable to common shareholders (Note 5) (in Canadian dollars per share)	$ 0.63
Balance at the beginning of the period at Dec. 31, 2018	$ 73,435	7,747	64,677		(5,538)	2,672	(88)		3,965
Increase (Decrease) in Stockholders' Equity
Options exercised			55	(49)
Stock-based compensation				21
Change in reciprocal interest				109					(65)
Repurchase of noncontrolling interest				65
Other				48
Earnings attributable to controlling interests	3,818				3,818
Preference share dividends					(191)
Dividends paid to reciprocal shareholder					9
Common share dividends declared					(1,500)
Other					10	55			6
Other comprehensive income/(loss) attributable to common shareholders, net of tax						(2,603)
Change in reciprocal interest							37
Earnings/(loss) attributable to noncontrolling interests									35
Change in unrealized gain/(loss) on cash flow hedges									(5)
Foreign currency translation adjustments									(94)
Reclassification to earnings of loss on cash flow hedges									0
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax									(99)
Comprehensive income/(loss) attributable to noncontrolling interests									(64)
Contributions									9
Distributions									(100)
Redemption of preferred shares held by subsidiary									(300)
Balance at the end of the period at Jun. 30, 2019	$ 72,805	7,747	64,732	194	(3,392)	124	(51)	69,354	3,451
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 1.476
Earnings per common share attributable to common shareholders (Note 5) (in Canadian dollars per share)	1.80
Diluted earnings per common share attributable to common shareholders (Note 5) (in Canadian dollars per share)	$ 1.80
Balance at the beginning of the period at Mar. 31, 2019		7,747	64,728	72	(3,640)	1,449	(51)		3,614
Increase (Decrease) in Stockholders' Equity
Options exercised			4	(6)
Stock-based compensation				17
Change in reciprocal interest									(65)
Repurchase of noncontrolling interest				65
Other				46
Earnings attributable to controlling interests	$ 1,832				1,832
Preference share dividends					(96)
Dividends paid to reciprocal shareholder					4
Common share dividends declared					(1,500)
Other					8				1
Other comprehensive income/(loss) attributable to common shareholders, net of tax						(1,325)
Earnings/(loss) attributable to noncontrolling interests									(2)
Change in unrealized gain/(loss) on cash flow hedges									(4)
Foreign currency translation adjustments									(45)
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax									(49)
Comprehensive income/(loss) attributable to noncontrolling interests									(51)
Contributions									6
Distributions									(54)
Balance at the end of the period at Jun. 30, 2019	$ 72,805	$ 7,747	$ 64,732	$ 194	$ (3,392)	$ 124	$ (51)	$ 69,354	$ 3,451
Increase (Decrease) in Stockholders' Equity
Dividends paid per common share (in Canadian dollars per share)	$ 0.738
Earnings per common share attributable to common shareholders (Note 5) (in Canadian dollars per share)	0.86
Diluted earnings per common share attributable to common shareholders (Note 5) (in Canadian dollars per share)	$ 0.86