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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Taxes [Abstract] |
Disclosure of major components of tax expense |
|  | Years ended December 31 |
(In millions of dollars) |  | 2017 |  | 2016 |
Current tax expense: |  |  |
Total current tax expense |  | 351 |  | 386 |
Deferred tax expense (recovery): |  |  |
Origination (reversal) of temporary differences |  | 282 |  | (65 | )
Revaluation of deferred tax balances due to legislative changes |  | 2 |  | 3 |
Total deferred tax expense (recovery) |  | 284 |  | (62 | )
Total income tax expense |  | 635 |  | 324 |
Disclosure of difference between income tax expense computed by applying the statutory income tax rate to income before income tax expense and the income tax expense | Below is a summary of the difference between income tax expense computed by applying the statutory income tax rate to income before income tax expense and the income tax expense for the year.
|  | Years ended December 31 |
(In millions of dollars, except rates) |  | 2017 |  | 2016 |
Statutory income tax rate |  | 26.7 | % | 26.6 | %
Income before income tax expense |  | 2,346 |  | 1,159 |
Computed income tax expense |  | 626 |  | 308 |
Increase (decrease) in income tax expense resulting from: |  |  |
Non-deductible stock-based compensation |  | 9 |  | 5 |
Non-deductible portion of equity losses |  | — |  | 18 |
Non-deductible loss on available-for-sale investments |  | 7 |  | — |
Income tax adjustment, legislative tax change |  | 2 |  | 3 |
Non-taxable portion of capital gain |  | (10 | ) | (7 | )
Other |  | 1 |  | (3 | )
Total income tax expense |  | 635 |  | 324 |
Effective income tax rate |  | 27.1 | % | 28.0 | %
Disclosure of temporary difference, unused tax losses and unused tax credits |
|  | As at December 31 |
(In millions of dollars) |  | 2017 |  | 2016 |
Deferred tax assets |  | 3 |  | 8 |
Deferred tax liabilities |  | (2,206 | ) | (1,917 | )
Net deferred tax liability |  | (2,203 | ) | (1,909 | )
Below is a summary of the movement of net deferred tax assets and liabilities during 2017 and 2016.
Deferred tax assets (liabilities) (In millions of dollars) | Property, plant and equipment and inventory |  | Goodwill and other intangibles |  | Investments |  | Non-capital loss carryforwards |  | Other |  | Total |
January 1, 2017 | (947 | ) | (953 | ) | (61 | ) | 24 |  | 28 |  | (1,909 | )
Expense in net income | (113 | ) | (117 | ) | (3 | ) | (6 | ) | (45 | ) | (284 | )
(Expense) recovery in other comprehensive income | — |  | — |  | (62 | ) | — |  | 57 |  | (5 | )
Other | — |  | (5 | ) | — |  | — |  | — |  | (5 | )
December 31, 2017 | (1,060 | ) | (1,075 | ) | (126 | ) | 18 |  | 40 |  | (2,203 | )
Deferred tax assets (liabilities) (In millions of dollars) | Property, plant and equipment and inventory |  | Goodwill and other intangibles |  | Stub period income and partnership reserve |  | Investments |  | Non-capital loss carryforwards |  | Other |  | Total |
January 1, 2016 | (921 | ) | (844 | ) | (178 | ) | (61 | ) | 32 |  | (85 | ) | (2,057 | )
(Expense) recovery in net income | (26 | ) | (109 | ) | 178 |  | 7 |  | (8 | ) | 20 |  | 62 |
(Expense) recovery in other comprehensive income | — |  | — |  | — |  | (7 | ) | — |  | 93 |  | 86 |
December 31, 2016 | (947 | ) | (953 | ) | — |  | (61 | ) | 24 |  | 28 |  | (1,909 | )
Disclosure of unrecognized deferred tax assets | We have not recognized deferred tax assets for the following items:
|  | As at December 31 |
(In millions of dollars) |  | 2017 |  | 2016 |
Capital losses in Canada that can be applied against future capital gains |  | — |  | 1 |
Tax losses in foreign jurisdictions that expire between 2023 and 2036 |  | 41 |  | 36 |
Deductible temporary differences in foreign jurisdictions |  | 23 |  | 14 |
Total unrecognized temporary differences |  | 64 |  | 51 |

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