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SUPPLEMENTAL CASH FLOW INFORMATION - Changes in non-cash operating working capital items (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash Flow Statement [Abstract]
Accounts receivable, excluding financing receivables	$ (201)	$ (78)
Financing receivables	(162)	(840)
Contract assets	8	417
Inventories	98	(56)
Other current assets	25	13
Accounts payable and accrued liabilities	36	556
Contract and other liabilities	44	25
Total change in net operating assets and liabilities	$ (152)	$ 37

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- Definition

Adjustments for decrease (increase) in inventories to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Inventories; Profit (loss)]

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Adjustments for decrease (increase) in other current assets to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Other current assets; Profit (loss)]

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Adjustments for increase (decrease) in trade and other payables to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Trade and other payables; Profit (loss)]

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The increase (decrease) in working capital.

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Adjustments for increase (decrease) in deferred income to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Deferred income; Profit (loss)]

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Cash Flow Statement [Abstract]

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Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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