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Supplementary Information to Consolidated Statements of Cash Flows (Details) - CAD CAD in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Cash paid for: |  |
Interest | CAD 644 | CAD 561
Income taxes | 62 | 109
Change in non-cash operating working capital: |  |
Accounts receivable and other current assets | 43 | 14
Prepaid expenses | (4) | (1)
Inventories | 17 | 15
Regulatory assets - current portion | (58) | 57
Accounts payable and other current liabilities | 25 | (82)
Regulatory liabilities - current portion | (1) | 38
Changes in non-cash operating working capital | 22 | 41
Non-cash investing and financing activities: |  |
Common share dividends reinvested | 162 | 156
Common shares issued on business acquisition (Notes 17 and 27) | 4,684 | 0
Additions to utility capital assets and intangible assets included in current and long-term liabilities | 296 | 187
Commitment to purchase capital lease interest (Note 15) | 48 | 0
Transfer of deposit on business acquisition (Note 27) | 38 | 0
Contributions in aid of construction included in current assets | 9 | 4
Exercise of stock options into common shares | CAD 4 | CAD 4

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