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Capital Disclosure of cash flow statement (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of classes of share capital [line items] |  |  |
Cash flows from (used in) operating activities | $ 1,001 | $ 702 | $ 849
Increase (decrease) in cash flow from (used in) operating activities | 299 |  |
Change in non-cash operating working capital balances | (174) | (89) | (121)
Increase (decrease) in non cash working capital | (85) |  |
Cash flow from operations before changes in working capital | 827 | 613 | 728
Increase (decrease) in cash flow from operations before changes in working capital | 214 |  |
Distributions paid to subsidiaries’ non-controlling interests | 156 | 97 | 106
Increase (decrease) in dividends paid to non controlling interests | (59) |  |
Property, plant and equipment expenditures | 480 | 486 | 417
Increase (decrease) in property, plant and equipment expenditure | 6 |  |
Net inflows (outflows) of cash | 104 | (56) |
Increase (decrease) in net inflows (outflows) of cash | 160 |  |
Credit facilities | Committed credit facilities |  |  |
Disclosure of classes of share capital [line items] |  |  |
Undrawn borrowing capacity under line of credit | 1,300 | 1,500 |
Common shares |  |  |
Disclosure of classes of share capital [line items] |  |  |
Dividends paid | 48 | 47 | 45
Increase (decrease) in dividends paid | (1) |  |
Preferred shares |  |  |
Disclosure of classes of share capital [line items] |  |  |
Dividends paid | 39 | $ 39 | $ 40
Increase (decrease) in dividends paid | $ 0 |  |

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