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COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables) | 12 Months Ended
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Dec. 31, 2018
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, 2018, 2017 and 2016 are as follows:
| 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 |
| Cash Flow Hedges |  | Net Investment Hedges |  | Cumulative Translation Adjustment |  | Equity Investees |  | Pension and OPEB Adjustment |  | Total |
(millions of Canadian dollars) |  |  |  |  |  |
Balance at January 1, 2017 | (746 | ) | (629 | ) | 2,700 |  | 37 |  | (304 | ) | 1,058 |
Other comprehensive income/(loss) retained in AOCI | 1 |  | 478 |  | (2,623 | ) | (11 | ) | 18 |  | (2,137 | )
Other comprehensive (income)/loss reclassified to earnings |  |  |  |  |  |
Interest rate contracts 1 | 207 |  | — |  | — |  | — |  | — |  | 207 |
Commodity contracts 2 | (7 | ) | — |  | — |  | — |  | — |  | (7 | )
Foreign exchange contracts 3 | (6 | ) | — |  | — |  | — |  | — |  | (6 | )
Other contracts 4 | (6 | ) | — |  | — |  | — |  | — |  | (6 | )
Amortization of pension and OPEB actuarial loss and prior service costs 5 | — |  | — |  | — |  | — |  | 41 |  | 41 |
| 189 |  | 478 |  | (2,623 | ) | (11 | ) | 59 |  | (1,908 | )
Tax impact |  |  |  |  |  |
Income tax on amounts retained in AOCI | (16 | ) | 12 |  | — |  | (16 | ) | (10 | ) | (30 | )
Income tax on amounts reclassified to earnings | (71 | ) | — |  | — |  | — |  | (22 | ) | (93 | )
| (87 | ) | 12 |  | — |  | (16 | ) | (32 | ) | (123 | )
Balance at December 31, 2017 | (644 | ) | (139 | ) | 77 |  | 10 |  | (277 | ) | (973 | )
| Cash Flow Hedges |  | Net Investment Hedges |  | Cumulative Translation Adjustment |  | Equity Investees |  | Pension and OPEB Adjustment |  | Total |
(millions of Canadian dollars) |  |  |  |  |  |
Balance at January 1, 2016 | (688 | ) | (795 | ) | 3,365 |  | 37 |  | (287 | ) | 1,632 |
Other comprehensive income/(loss) retained in AOCI | (216 | ) | 171 |  | (665 | ) | (5 | ) | (45 | ) | (760 | )
Other comprehensive (income)/loss reclassified to earnings |  |  |  |  |  |
Interest rate contracts 1 | 147 |  | — |  | — |  | — |  | — |  | 147 |
Commodity contracts 2 | (11 | ) | — |  | — |  | — |  | — |  | (11 | )
Foreign exchange contracts 3 | 1 |  | — |  | — |  | — |  | — |  | 1 |
Other contracts 4 | (18 | ) | — |  | — |  | — |  | — |  | (18 | )
Amortization of pension and OPEB actuarial loss and prior service costs 5 | — |  | — |  | — |  | — |  | 21 |  | 21 |
| (97 | ) | 171 |  | (665 | ) | (5 | ) | (24 | ) | (620 | )
Tax impact |  |  |  |  |  |
Income tax on amounts retained in AOCI | 91 |  | (5 | ) | — |  | 5 |  | 11 |  | 102 |
Income tax on amounts reclassified to earnings | (52 | ) | — |  | — |  | — |  | (4 | ) | (56 | )
| 39 |  | (5 | ) | — |  | 5 |  | 7 |  | 46 |
Balance at December 31, 2016 | (746 | ) | (629 | ) | 2,700 |  | 37 |  | (304 | ) | 1,058 |
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 benefit costs and are reported within Operating and administrative 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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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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