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BORROWINGS - Additional Information (Details) $ in Millions |  |  | 6 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 06, 2020 CAD ($) | Nov. 06, 2019 CAD ($) | Jun. 30, 2021 USD ($) extension | Dec. 31, 2021 USD ($) | May 24, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 01, 2020 CAD ($) | Jun. 30, 2020 USD ($) | Apr. 07, 2020 CAD ($) | Oct. 07, 2019 CAD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Non-recourse borrowings classified as held for sale |  |  | $ 473,000,000 |  |  |  |  |  |  |
Non-recourse borrowings transferred to held for sale |  |  | 500,000,000 |  |  |  |  |  |  |
Corporate revolving credit facility |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 1,975,000,000 |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  | 13 |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 0 |  |  | $ 1,131,000,000 |  |  |  |
Letter of credit outstanding amount |  |  | 64,000,000 |  |  | 63,000,000 |  |  |  |
Increase (decrease) in corporate borrowings |  |  | $ (1,100,000,000) |  |  |  |  |  |  |
Corporate revolving credit facility | Floating interest rate |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  | 1.20% |  |  |  |  |  |  |
Medium-term Notes, Maturing September 11, 2028 [Domain] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 565,000,000 |  |  | 550,000,000 |  |  |  |
Medium-term Notes, Maturing September 11, 2028 [Domain] | Fixed interest rate |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  | 4.20% |  |  |  |  |  |  |
Revolving credit facility with Brookfield |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 500,000,000 |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 0 | $ 0 |  |  |  | $ 0 |  |
Borrowings, number of extensions | extension |  |  | 4 |  |  |  |  |  |  |
Revolving credit facility with Brookfield | Floating interest rate |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  | 1.80% |  |  |  |  |  |  |
Non-recourse borrowings |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 19,999,000,000 |  |  | 20,020,000,000 |  |  |  |
Syndicated Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 1,000,000,000.0 |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  | 13 |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 0 |  |  | 0 |  |  |  |
Syndicated Revolving Credit Facility [Member] | Floating interest rate |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  | 1.20% |  |  |  |  |  |  |
Medium-term Notes, Maturing October 9, 2029 [Domain] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 565,000,000 |  |  | 550,000,000 |  |  |  |
Medium-term Notes, Maturing October 9, 2029 [Domain] | Fixed interest rate |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  | 3.40% |  |  |  |  |  |  |
Subordinated Notes, Maturing May 24, 2081 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 250,000,000 |  |  | 0 |  |  |  |
Subordinated Notes, Maturing May 24, 2081 | Fixed interest rate |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  | 5.00% |  |  |  |  |  |  |
Medium-term Notes, Maturing September 1, 2032 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 403,000,000 |  |  | 392,000,000 |  |  |  |
Medium-term Notes, Maturing September 1, 2032 | Fixed interest rate |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  | 2.90% |  |  |  |  |  |  |
Commercial Paper |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Subsidiary and corporate borrowings |  |  | $ 496,000,000 |  |  | $ 0 |  |  |  |
Commercial Paper Program, Maximum Borrowing Capacity1 |  |  | $ 500,000,000 |  |  |  |  |  |  |
Commercial Paper | Fixed interest rate |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  | 0.40% |  |  |  |  |  |  |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing September 11, 2028 [Domain] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  | $ 200 |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing September 11, 2028 [Domain] | Fixed interest rate | Canada, Dollars |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  |  |  | 4.20% |
Borrowings, Effective Interest Rate |  |  |  |  |  |  |  |  | 4.10% |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing September 11, 2028 and October 9, 2029, Combined [Domain] [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  | $ 400 |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing October 9, 2029 [Domain] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  | $ 200 | $ 500
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing October 9, 2029 [Domain] | Fixed interest rate | USD |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  |  |  |  | 3.50%
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing October 9, 2029 [Domain] | Fixed interest rate | Canada, Dollars |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  |  |  | 3.40% | 3.40%
Borrowings, Effective Interest Rate |  |  |  |  |  |  |  |  | 4.10% |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium Term Notes, Maturing October 30, 2020 [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Extinguishment of Debt, Amount |  | $ 375 |  |  |  |  |  |  |  |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Subordinated Notes, Maturing May 24, 2081 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  | $ 250,000,000 |  |  |  |  |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Subordinated Notes, Maturing May 24, 2081 | Fixed interest rate | USD |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  | 5.00% |  |  |  |  |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing September 1, 2032 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | $ 500 |  |  |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing September 1, 2032 | Fixed interest rate | USD |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  | 3.90% |  |  |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium-term Notes, Maturing September 1, 2032 | Fixed interest rate | Canada, Dollars |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  | 2.90% |  |  |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Medium Term Notes, Public - Canadian - Maturing March 11, 2022 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Extinguishment of Debt, Amount | $ 450 |  |  |  |  |  |  |  |  |

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