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COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables) | 12 Months Ended
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Dec. 31, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Schedule of changes in AOCI attributable to Enbridge common shareholders | Changes in AOCI attributable to our common shareholders for the years ended December 31, 2020, 2019 and 2018 are as follows:
| Cash Flow Hedges | Excluded Components of Fair Value Hedges | Net Investment Hedges | Cumulative Translation Adjustment | Equity Investees | Pension and OPEB Adjustment | Total
(millions of Canadian dollars) |  |  |  |  |  |  |
Balance at January 1, 2020 | (1,073) |  | — |  | (317) |  | 1,396 |  | 67 |  | (345) |  | (272) |
Other comprehensive income/(loss) retained in AOCI | (591) |  | 5 |  | 115 |  | (828) |  | (2) |  | (221) |  | (1,522) |
Other comprehensive (income)/loss reclassified to earnings |  |  |  |  |  |  |
Interest rate contracts 1 | 253 |  | — |  | — |  | — |  | — |  | — |  | 253 |
Foreign exchange contracts 3 | 5 |  | — |  | — |  | — |  | — |  | — |  | 5 |
Other contracts 4 | (2) |  | — |  | — |  | — |  | — |  | — |  | (2) |
Amortization of pension and OPEB actuarial loss and prior service costs 5 | — |  | — |  | — |  | — |  | — |  | 17 |  | 17 |
| (335) |  | 5 |  | 115 |  | (828) |  | (2) |  | (204) |  | (1,249) |
Tax impact |  |  |  |  |  |  |
Income tax on amounts retained in AOCI | 140 |  | — |  | (13) |  | — |  | 1 |  | 54 |  | 182 |
Income tax on amounts reclassified to earnings | (58) |  | — |  | — |  | — |  | — |  | (4) |  | (62) |
| 82 |  | — |  | (13) |  | — |  | 1 |  | 50 |  | 120 |
Balance at December 31, 2020 | (1,326) |  | 5 |  | (215) |  | 568 |  | 66 |  | (499) |  | (1,401) |
| Cash Flow Hedges | Net Investment Hedges | Cumulative Translation Adjustment | Equity Investees | Pension and OPEB Adjustment | Total
(millions of Canadian dollars) |  |  |  |  |  |
Balance at January 1, 2019 | (770) |  | (598) |  | 4,323 |  | 34 |  | (317) |  | 2,672 |
Other comprehensive income/(loss) retained in AOCI | (599) |  | 320 |  | (2,927) |  | 34 |  | (124) |  | (3,296) |
Other comprehensive (income)/loss reclassified to earnings |  |  |  |  |  |
Interest rate contracts 1 | 157 |  | — |  | — |  | — |  | — |  | 157 |
Commodity contracts 2 | (1) |  | — |  | — |  | — |  | — |  | (1) |
Foreign exchange contracts 3 | 5 |  | — |  | — |  | — |  | — |  | 5 |
Other contracts 4 | (3) |  | — |  | — |  | — |  | — |  | (3) |
Amortization of pension and OPEB actuarial loss and prior service costs 5 | — |  | — |  | — |  | — |  | 17 |  | 17 |
| (441) |  | 320 |  | (2,927) |  | 34 |  | (107) |  | (3,121) |
Tax impact |  |  |  |  |  |
Income tax on amounts retained in AOCI | 169 |  | (39) |  | — |  | 6 |  | 28 |  | 164 |
Income tax on amounts reclassified to earnings | (31) |  | — |  | — |  | — |  | (4) |  | (35) |
| 138 |  | (39) |  | — |  | 6 |  | 24 |  | 129 |
Other | — |  | — |  | — |  | (7) |  | 55 |  | 48 |
Balance at December 31, 2019 | (1,073) |  | (317) |  | 1,396 |  | 67 |  | (345) |  | (272) |
| Cash Flow Hedges | Net Investment Hedges | Cumulative Translation Adjustment | Equity Investees | Pension and OPEB Adjustment | Total
(millions of Canadian dollars) |  |  |  |  |  |
Balance at January 1, 2018 | (644) |  | (139) |  | 77 |  | 10 |  | (277) |  | (973) |
Other comprehensive income/(loss) retained in AOCI | (244) |  | (509) |  | 4,301 |  | 16 |  | (85) |  | 3,479 |
Other comprehensive (income)/loss reclassified to earnings |  |  |  |  |  |
Interest rate contracts 1 | 157 |  | — |  | — |  | — |  | — |  | 157 |
Commodity contracts 2 | (1) |  | — |  | — |  | — |  | — |  | (1) |
Foreign exchange contracts 3 | 7 |  | — |  | — |  | — |  | — |  | 7 |
Other contracts 4 | 22 |  | — |  | — |  | — |  | — |  | 22 |
Amortization of pension and OPEB actuarial loss and prior service costs 5 | — |  | — |  | — |  | — |  | 16 |  | 16 |
| (59) |  | (509) |  | 4,301 |  | 16 |  | (69) |  | 3,680 |
Tax impact |  |  |  |  |  |
Income tax on amounts retained in AOCI | 57 |  | 50 |  | — |  | 8 |  | 33 |  | 148 |
Income tax on amounts reclassified to earnings | (37) |  | — |  | — |  | — |  | (4) |  | (41) |
| 20 |  | 50 |  | — |  | 8 |  | 29 |  | 107 |
Sponsored Vehicles buy-in 6 | (87) |  | — |  | (55) |  | — |  | — |  | (142) |
Balance at December 31, 2018 | (770) |  | (598) |  | 4,323 |  | 34 |  | (317) |  | 2,672 |
1 Reported within Interest expense in the Consolidated Statements of Earnings. 2 Reported within Transportation and other services revenue, 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 Reported within Operating and administrative expense in the Consolidated Statements of Earnings. 5 These components are included in the computation of net benefit costs and are reported within Other income/(expense) in the Consolidated Statements of Earnings. 6 Represents the historical noncontrolling interests and redeemable noncontrolling interests related to the Sponsored Vehicles reclassified to AOCI, upon the completion of the buy-in.

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