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FINANCING EXPENSES | 12 Months Ended
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Dec. 31, 2019
DEBT AND CREDIT FACILITIES |
FINANCING (INCOME) EXPENSES | 9. FINANCING EXPENSES Financing expenses consist of the following:
($ millions) |  | 2019 |  | 2018 |  |
Interest on debt |  | 825 |  | 897 |  |
Interest on lease liabilities(1) |  | 172 |  | — |  |
Capitalized interest at 5.3% (2018 – 5.4%) |  | (122 | ) | (156 | ) |
| Interest expense |  | 875 |  | 741 |  |
| Interest on partnership liability |  | 55 |  | 56 |  |
| Interest on pension and other post-retirement benefits |  | 59 |  | 56 |  |
| Accretion |  | 270 |  | 266 |  |
| Foreign exchange (gain) loss on U.S. dollar denominated debt |  | (624 | ) | 1 090 |  |
| Operational foreign exchange and other |  | (2 | ) | (67 | ) |
|  | 633 |  | 2 142 |  |
(1) | The company adopted IFRS 16 on January 1, 2019 using the modified retrospective transition approach and, therefore, prior periods have not been restated. Refer to note 5 for further information.

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