ACQUISITIONS AND DISPOSITIONS - Summary of Estimated Fair Values Assigned to Net Assets (Details) $ in Millions	May 31, 2024 CAD ($)	May 31, 2024 USD ($)	Mar. 06, 2024 CAD ($)	Mar. 06, 2024 USD ($)	Jan. 02, 2024 CAD ($) promissoryNote	Jan. 02, 2024 USD ($)	Jun. 30, 2024 CAD ($)	Jan. 02, 2024 USD ($) promissoryNote	Dec. 31, 2023 CAD ($)
Fair value of net assets acquired:
Goodwill							$ 34,316,000,000		$ 31,848,000,000
Questar Gas Company
Fair value of net assets acquired:
Current assets	$ 464,000,000
Property, plant and equipment	5,921,000,000
Long-term assets	191,000,000
Current liabilities	407,000,000
Long-term debt	1,343,000,000
Other long-term liabilities	948,000,000
Deferred income tax liabilities	522,000,000
Goodwill	751,000,000
Purchase price:
Cash	4,107,000,000
Deferred consideration
Purchase price	4,100,000,000	$ 3,000
Expected credit loss	9,000,000
Fair value adjustment of long-term debt	301,000,000
Fair value adjustment of regulatory offset	0
Questar Gas Company | Carrying value
Deferred consideration
Trade receivables	$ 201,000,000
EOG Acquisition
Fair value of net assets acquired:
Current assets			$ 641,000,000
Property, plant and equipment			7,253,000,000
Long-term assets			1,647,000,000
Current liabilities			670,000,000
Long-term debt			2,612,000,000
Other long-term liabilities			993,000,000
Deferred income tax liabilities			1,036,000,000
Goodwill			1,608,000,000
Purchase price:
Cash			5,838,000,000
Deferred consideration
Purchase price			5,800,000,000	$ 4,300
Expected credit loss			3,000,000
Overfunded pension plan assets			395,000,000
Regulatory assets			1,200,000,000
Fair value adjustment of long-term debt			478,000,000
Fair value adjustment of regulatory offset			0
EOG Acquisition | Carrying value
Deferred consideration
Trade receivables			$ 376,000,000
RNG Facilities
Fair value of net assets acquired:
Current assets					$ 31,000,000
Intangible assets					925,000,000
Property, plant and equipment					174,000,000
Current liabilities					5,000,000
Goodwill					223,000,000
Purchase price:
Cash					584,000,000	$ 439
Deferred consideration
Current portion of long-term debt					550,000,000
Long-term debt					207,000,000
Other adjustments					7,000,000
Purchase price					$ 1,348,000,000	$ 1,000
Goodwill expected tax deductible period (in years)					15 years	15 years
Number of non-interest promissory notes | promissoryNote					6			6
Remaining consideration payable, payment period (in years)					2 years	2 years
Consideration transferred, liabilities incurred					$ 757,000,000	$ 568
RNG Facilities | Non-Interest Bearing Promissory Notes | Notes Payable, Other Payables
Deferred consideration
Deferred payments					$ 808,000,000			$ 606
RNG Facilities | Minimum
Deferred consideration
Amortized on a straight-line basis over term (in years)					13 years	13 years
RNG Facilities | Maximum
Deferred consideration
Amortized on a straight-line basis over term (in years)					42 years	42 years