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Additional cash flow information (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Changes in liabilities arising from financing activities [abstract] |  |
Beginning balance | $ 24,125 | $ 22,045
Cash flows used in financing activities |  |
(Decrease) increase in notes payable | (123) | 333
Issue of long-term debt | 2,996 | 3,011
Repayment of long-term debt | (2,713) | (2,653)
Cash dividends paid on common and preferred shares | (2,828) | (2,639)
Cash dividends paid by subsidiaries to non-controlling interests | (16) | (34)
Other financing activities | (77) | (60)
Total cash flows from (used in) financing activities excluding equity | (2,761) | (2,042)
Non-cash changes arising from |  |
Finance lease additions | 414 | 339
Dividends declared on common and preferred shares | 2,856 | 2,692
Dividends declared by subsidiaries to non-controlling interests | 5 | 45
Effect of changes in foreign exchange rates | 0 | 0
Business acquisitions | 96 | 972
Other | 192 | 74
Total non-cash changes | 3,563 | 4,122
Ending balance | 24,927 | 24,125
DEBT DUE WITHIN ONE YEAR AND LONG-TERM DEBT |  |
Changes in liabilities arising from financing activities [abstract] |  |
Beginning balance | 23,393 | 21,459
Cash flows used in financing activities |  |
(Decrease) increase in notes payable | (241) | 452
Issue of long-term debt | 2,996 | 3,011
Repayment of long-term debt | (2,713) | (2,653)
Cash dividends paid on common and preferred shares | 0 | 0
Cash dividends paid by subsidiaries to non-controlling interests | 0 | 0
Other financing activities | (42) | (44)
Total cash flows from (used in) financing activities excluding equity | 0 | 766
Non-cash changes arising from |  |
Finance lease additions | 414 | 339
Dividends declared on common and preferred shares | 0 | 0
Dividends declared by subsidiaries to non-controlling interests | 0 | 0
Effect of changes in foreign exchange rates | 341 | (198)
Business acquisitions | 96 | 972
Other | 161 | 55
Total non-cash changes | 1,012 | 1,168
Ending balance | 24,405 | 23,393
DERIVATIVE TO HEDGE FOREIGN CURRENCY ON DEBT |  |
Changes in liabilities arising from financing activities [abstract] |  |
Beginning balance | 54 | (31)
Cash flows used in financing activities |  |
(Decrease) increase in notes payable | 118 | (119)
Issue of long-term debt | 0 | 0
Repayment of long-term debt | 0 | 0
Cash dividends paid on common and preferred shares | 0 | 0
Cash dividends paid by subsidiaries to non-controlling interests | 0 | 0
Other financing activities | 0 | 6
Total cash flows from (used in) financing activities excluding equity | 118 | (113)
Non-cash changes arising from |  |
Finance lease additions | 0 | 0
Dividends declared on common and preferred shares | 0 | 0
Dividends declared by subsidiaries to non-controlling interests | 0 | 0
Effect of changes in foreign exchange rates | (341) | 198
Business acquisitions | 0 | 0
Other | 0 | 0
Total non-cash changes | (341) | 198
Ending balance | (169) | 54
DIVIDENDS PAYABLE |  |
Changes in liabilities arising from financing activities [abstract] |  |
Beginning balance | 678 | 617
Cash flows used in financing activities |  |
(Decrease) increase in notes payable | 0 | 0
Issue of long-term debt | 0 | 0
Repayment of long-term debt | 0 | 0
Cash dividends paid on common and preferred shares | (2,828) | (2,639)
Cash dividends paid by subsidiaries to non-controlling interests | (16) | (34)
Other financing activities | 0 | 0
Total cash flows from (used in) financing activities excluding equity | (2,844) | (2,673)
Non-cash changes arising from |  |
Finance lease additions | 0 | 0
Dividends declared on common and preferred shares | 2,856 | 2,692
Dividends declared by subsidiaries to non-controlling interests | 5 | 45
Effect of changes in foreign exchange rates | 0 | 0
Business acquisitions | 0 | 0
Other | (4) | (3)
Total non-cash changes | 2,857 | 2,734
Ending balance | 691 | 678
OTHER LIABILITIES |  |
Changes in liabilities arising from financing activities [abstract] |  |
Beginning balance | 0 | 0
Cash flows used in financing activities |  |
(Decrease) increase in notes payable | 0 | 0
Issue of long-term debt | 0 | 0
Repayment of long-term debt | 0 | 0
Cash dividends paid on common and preferred shares | 0 | 0
Cash dividends paid by subsidiaries to non-controlling interests | 0 | 0
Other financing activities | (35) | (22)
Total cash flows from (used in) financing activities excluding equity | (35) | (22)
Non-cash changes arising from |  |
Finance lease additions | 0 | 0
Dividends declared on common and preferred shares | 0 | 0
Dividends declared by subsidiaries to non-controlling interests | 0 | 0
Effect of changes in foreign exchange rates | 0 | 0
Business acquisitions | 0 | 0
Other | 35 | 22
Total non-cash changes | 35 | 22
Ending balance | $ 0 | $ 0

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