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other operating income (Tables) | 12 Months Ended
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Dec. 31, 2018
other operating income |
Schedule of other operating income |
Years ended December 31 (millions) |  | Note |  | 2018 |  | 2017
Government assistance, including deferral account amortization |  |  |  | $ | 23 |  | $ | 32
Investment income, gain (loss) on disposal of assets and other |  | 21 |  |  | 230 |  |  | 45
Changes in business combination-related accrued receivable and provisions |  |  |  |  | 17 |  |  | 26
Interest income |  | 21(c) |  |  | 3 |  |  | —
|  |  |  | $ | 273 |  | $ | 103

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- Definition Tabular disclosure of each detailed component of other operating income + References No definition available. + Details
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