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BORROWINGS - Additional Information (Details) $ in Millions, $ in Millions |  | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 06, 2019 CAD ($) | Jun. 30, 2020 USD ($) extension | Apr. 07, 2020 CAD ($) | Dec. 31, 2019 USD ($) | Oct. 07, 2019 CAD ($) | Sep. 10, 2018 CAD ($)
Corporate revolving credit facility |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  | $ 1,975 |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 13 |  |  |  |
Subsidiary and corporate borrowings |  | $ 1,210 |  | $ 820 |  |
Letter of credit outstanding amount |  | 55 |  | 54 |  |
Increase (decrease) in corporate borrowings |  | $ 390 |  |  |  |
Corporate revolving credit facility | Floating interest rate |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.20% |  |  |  |
Medium-term Notes, Maturing September 11, 2028 [Domain] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Subsidiary and corporate borrowings |  | $ 516 |  | 384 |  |
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 |  |  |  |
Subsidiary and corporate borrowings |  | $ 0 |  | 0 |  |
Borrowings, number of extensions | extension |  | 4 |  |  |  |
Commitment fees |  | $ 0 |  |  |  |
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 |  | $ 17,860 |  | 18,544 |  |
Increase in borrowings |  | (700) |  |  |  |
Proceeds from non-current borrowings |  | 200 |  |  |  |
Syndicated Revolving Credit Facility [Member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  | $ 1,000 |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 42 |  |  |  |
Subsidiary and corporate borrowings |  | $ 0 |  | 0 |  |
Syndicated Revolving Credit Facility [Member] | Floating interest rate |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 2.10% |  |  |  |
Medium-term Notes, Maturing October 9, 2029 [Domain] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Subsidiary and corporate borrowings |  | $ 516 |  | $ 386 |  |
Medium-term Notes, Maturing October 9, 2029 [Domain] | Fixed interest rate |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings, interest rate |  | 3.40% |  |  |  |
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 |  |  | $ 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 11, 2028 [Domain] | Fixed interest rate | Canada, Dollars |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings, interest rate |  |  | 4.20% |  |  | 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 | 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 |  |  |  |  |
Pro Forma [Member] | Syndicated Revolving Credit Facility [Member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 44 |  |  |  |
Pro Forma [Member] | Syndicated Revolving Credit Facility [Member] | Floating interest rate |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 2.20% |  |  |  |

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