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BORROWINGS - Corporate Borrowings (Details) $ in Millions |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 25, 2022 USD ($) | May 24, 2021 USD ($) | Dec. 31, 2023 USD ($) renewal | Jul. 27, 2023 CAD ($) | Dec. 31, 2022 USD ($) | Nov. 14, 2022 CAD ($) | Apr. 25, 2022 CAD ($) | Feb. 24, 2021 USD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 528,000,000 |  |  |  |  |
Deferred financing costs and other |  |  | (21,000,000) |  | $ (23,000,000) |  |  |
Current and non-current portion of corporate borrowings |  |  | 4,911,000,000 |  | 3,666,000,000 |  |  |
Notional Amount (U.S. Dollars) |  |  | 21,276,000,000 |  | 12,570,000,000 |  |  |
Commercial papers issued |  |  | 989,000,000 |  | 464,000,000 |  |  |
Corporate Revolving Credit Facility |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 222,000,000 |  | 96,000,000 |  |  |
Corporate Revolving Credit Facility | Floating interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  | 1.20% |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  | 1.20% |  |  |  |  |
Commercial Paper Program |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 989,000,000 |  | 464,000,000 |  |  |
Commercial Paper Program | Establishment of Commercial Paper Program |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Commercial papers issued |  |  |  |  |  |  |  | $ 1,000,000,000
Commercial Paper Program | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 6.10% |  |  |  |  |
Medium Term Notes, Public - Canadian - Maturing February 22, 2024 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 226,000,000 |  | 222,000,000 |  |  |
Medium Term Notes, Public - Canadian - Maturing February 22, 2024 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 3.30% |  |  |  |  |
Medium Term Notes, Public - Canadian - Maturing February 22, 2024 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 302,000,000 |  | 295,000,000 |  |  |
Medium Term Notes, Public - Canadian - Maturing February 22, 2024 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 3.30% |  |  |  |  |
Medium-term Notes, Maturing November 31, 2027 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 340,000,000 |  | 332,000,000 |  |  |
Medium-term Notes, Maturing November 31, 2027 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 5.60% |  |  |  |  |
Medium-term Notes, Maturing September 11, 2028 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 528,000,000 |  | 517,000,000 |  |  |
Medium-term Notes, Maturing September 11, 2028 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 4.20% |  |  |  |  |
Medium-term Notes, Maturing October 9, 2029 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 528,000,000 |  | 517,000,000 |  |  |
Medium-term Notes, Maturing October 9, 2029 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 3.40% |  |  |  |  |
Medium-term Notes, Maturing July 27, 2030 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 377,000,000 |  | 0 |  |  |
Notional Amount (U.S. Dollars) |  |  |  | $ 700 |  |  |  |
Medium-term Notes, Maturing July 27, 2030 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 5.70% |  |  |  |  |
Medium-term Notes, Maturing July 27, 2030 Tranche One |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  | $ 500 |  |  |  |
Medium-term Notes, Maturing July 27, 2030 Tranche One | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  |  | 5.71% |  |  |  |
Medium-term Notes, Maturing July 27, 2030 Tranche Two |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  | $ 200 |  |  |  |
Medium-term Notes, Maturing July 27, 2030 Tranche Two | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  |  | 5.95% |  |  |  |
Medium-term Notes, Maturing September 1, 2032 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 377,000,000 |  | 369,000,000 |  |  |
Medium-term Notes, Maturing September 1, 2032 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 2.90% |  |  |  |  |
Medium-term Notes, Maturing February 13, 2033 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 189,000,000 |  | 185,000,000 |  |  |
Medium-term Notes, Maturing February 13, 2033 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 6.00% |  |  |  |  |
Medium-term Notes, Maturing April 25, 2034 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 302,000,000 |  | 295,000,000 |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  |  | $ 600 |
Finance costs | $ 3,000,000 |  |  |  |  |  |  |
Medium-term Notes, Maturing April 25, 2034 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 5.40% |  |  |  |  |
Medium-term Notes, Maturing April 25, 2052 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 151,000,000 |  | 147,000,000 |  |  |
Medium-term Notes, Maturing April 25, 2052 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 5.80% |  |  |  |  |
Medium-term Notes, Maturing July 27, 2053 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 151,000,000 |  | 0 |  |  |
Medium-term Notes, Maturing July 27, 2053 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 6.00% |  |  |  |  |
Subordinated notes, Maturing 2081 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  | 5.00% |  |  |  |  |  |
Total |  | $ 250,000,000 | $ 250,000,000 |  | 250,000,000 |  |  |
Debt issuance costs |  | $ 6,000,000 |  |  |  |  |  |
Subordinated notes, Maturing 2081 | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  | 5.00% |  |  |  |  |
Corporate borrowings |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Total |  |  | $ 4,932,000,000 |  | 3,689,000,000 |  |  |
Increase (decrease) in corporate borrowings |  |  | 1,245,000,000 |  |  |  |  |
Corporate revolving credit facility |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 2,200,000,000 |  | 2,100,000,000 |  |  |
Basis points |  |  | 0.0013 |  |  |  |  |
Total |  |  |  |  | 96,000,000 |  |  |
Letter of credit outstanding amount |  |  | $ 8,000,000 |  | 12,000,000 |  |  |
Corporate revolving credit facility | Floating interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  | 1.20% |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  | 1.20% |  |  |  |  |
Revolving credit facility with Brookfield |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 1,000,000,000 |  | 1,000,000,000 |  |  |
Total |  |  | $ 0 |  | $ 0 |  |  |
Borrowings renewal | renewal |  |  | 8 |  |  |  |  |
Borrowings, term |  |  | 1 year |  |  |  |  |
Revolving credit facility with Brookfield | Floating interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  | 1.90% |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  | 1.90% |  |  |  |  |
Medium-term Notes, Maturing November 14, 2027 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  | $ 700 |  |
Medium-term Notes, Maturing November 14, 2027 Tranche One |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  | $ 450 |  |
Medium-term Notes, Maturing November 14, 2027 Tranche One | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  | 5.616% |  |
Medium-term Notes, Maturing November 14, 2027 Tranche Two |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  | $ 250 |  |
Medium-term Notes, Maturing November 14, 2027 Tranche Two | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  | 5.98% |  |
Medium-term Notes, Maturing April 25, 2034 Tranche One |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  |  | $ 400 |
Medium-term Notes, Maturing April 25, 2034 Tranche One | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  |  | 5.439% |
Medium-term Notes, Maturing April 25, 2034 Tranche Two |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  |  | $ 200 |
Medium-term Notes, Maturing April 25, 2034 Tranche Two | Fixed interest rate |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  |  | 5.789% |

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