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INCOME TAXES - Deferred Income Taxes (Details) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred income tax liabilities |  |
Property, plant and equipment | $ (9,096) | $ (8,721)
Investments | (7,099) | (6,097)
Regulatory assets | (1,291) | (1,245)
Pension and OPEB plans | (30) | 0
Other | (46) | (208)
Total deferred income tax liabilities | (17,562) | (16,271)
Deferred income tax assets |  |
Financial instruments | 456 | 315
Pension and OPEB plans | 0 | 110
Loss carryforwards | 2,259 | 3,081
Other | 1,753 | 1,648
Total deferred income tax assets | 4,468 | 5,154
Less valuation allowance | (215) | (84)
Total deferred income tax assets, net | 4,253 | 5,070
Net deferred income tax liabilities | (13,309) | (11,201)
Deferred income taxes | 472 | 488
Total deferred income tax liabilities | (13,781) | (11,689)
Operating loss carryforwards that do not expire | 7,900 | 7,500
Foreign subsidiaries' undistributed earnings on which deferred income taxes has not been provided | 8,000 | 4,300
Canada |  |
Deferred income tax assets |  |
Benefit of unused tax loss carryforwards recognized | 2,100 | 1,900
US |  |
Deferred income tax assets |  |
Benefit of unused tax loss carryforwards recognized | 8,100 | 11,000
Operating loss carryforwards that expire | $ 200 | $ 3,500

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