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COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)
 6 Months Ended
Jun. 30, 2018
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 six months ended June 30, 2018 and 2017 are as follows:
 
Cash Flow 
Hedges

Net
Investment
Hedges

Cumulative
Translation
Adjustment

Equity
Investees

Pension and
OPEB
Adjustment

Total

(millions of Canadian dollars)
 
 
 
 
 
 
Balance as at January 1, 2018
(644
)
(139
)
77

10

(277
)
(973
)
Other comprehensive income/(loss) retained in AOCI
100

(328
)
2,354

3

—

2,129

Other comprehensive (income)/loss reclassified to earnings
 
 
 
 
 


Interest rate contracts1
67

—

—

—

—

67

Commodity contracts2
(1
)
—

—

—

—

(1
)
Foreign exchange contracts3
5

—

—

—

—

5

Other contracts4
3

—

—

—

—

3

Amortization of pension and OPEB actuarial loss and prior service costs5
—

—

—

—

31

31

 
174

(328
)
2,354

3

31

2,234

Tax impact
 

 

 

 

 

 

Income tax on amounts retained in AOCI
(13
)
45

—

10

—

42

Income tax on amounts reclassified to earnings
(18
)
—

—

—

(8
)
(26
)
 
(31
)
45

—

10

(8
)
16

Balance as at June 30, 2018
(501
)
(422
)
2,431

23

(254
)
1,277

 
Cash Flow
Hedges

Net
Investment
Hedges

Cumulative
Translation
Adjustment

Equity
Investees

Pension and
OPEB
Adjustment

Total

(millions of Canadian dollars)
 
 
 
 
 
 
Balance as at January 1, 2017
(746
)
(629
)
2,700

37

(304
)
1,058

Other comprehensive income/(loss) retained in AOCI
(44
)
222

(899
)
3

—

(718
)
Other comprehensive (income)/loss reclassified to earnings
 
 
 
 
 


Interest rate contracts1
71

—

—

—

—

71

Commodity contracts2
(4
)
—

—

—

—

(4
)
Foreign exchange contracts3
2

—

—

—

—

2

Amortization of pension and OPEB actuarial loss and prior service costs5

—

—

—

—

10

10

 
25

222

(899
)
3

10

(639
)
Tax impact
 
 
 
 
 
 
Income tax on amounts retained in AOCI
12

(2
)
—

5

—

15

Income tax on amounts reclassified to earnings
(23
)
—

—

—

(3
)
(26
)
 
(11
)
(2
)
—

5

(3
)
(11
)
Balance as at June 30, 2017
(732
)
(409
)
1,801

45

(297
)
408

 
1
Reported within Interest expense in the Consolidated Statements of Earnings.
2
Reported within Commodity costs in the Consolidated Statements of Earnings.
3
Reported within Other income/(expense) in the Consolidated Statements of Earnings.
4
Reported within Operating and administrative expense in the Consolidated Statements of Earnings.
5
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.