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SUBSIDIARY PUBLIC ISSUERS - Additional Information (Details) $ / shares in Units, shares in Millions, $ in Millions, $ in Millions |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 06, 2019 CAD ($) | Feb. 05, 2019 USD ($) shares | Feb. 05, 2019 CAD ($) $ / shares shares | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) shares | Jun. 30, 2020 USD ($) | Dec. 31, 2020 shares | May 24, 2021 USD ($) | Sep. 01, 2020 CAD ($) | Apr. 07, 2020 CAD ($) | Oct. 07, 2019 CAD ($)
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuing shares |  |  |  | $ 3 | $ 3 | $ 6 | $ 5 |  |  |  |  |
Preferred Unitholders Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number Of Shares Issued1 | shares |  |  |  |  |  | 8.0 |  | 8.0 |  |  |  |
Quarterly Fixed Distribution Rate |  |  |  |  |  | 4.50% |  |  |  |  |  |
Preferred Unitholders Capital [Member] | BIPIC Series 1 Senior Preferred Shares [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number Of Shares Issued1 | shares |  | 4.0 | 4.0 |  |  |  |  |  |  |  |  |
Number of share issued, price per share | $ / shares |  |  | $ 25 |  |  |  |  |  |  |  |  |
Quarterly Fixed Distribution Rate |  | 5.85% | 5.85% |  |  |  |  |  |  |  |  |
Share underwriting related cost |  | $ 2 |  |  |  |  |  |  |  |  |  |
Share issue related cost |  | 1 |  |  |  |  |  |  |  |  |  |
Preferred Unitholders Capital [Member] | BIPIC Series 1 Senior Preferred Shares [Domain] | Canada, Dollars |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuing shares |  |  | $ 100 |  |  |  |  |  |  |  |  |
Preferred Unitholders Capital [Member] | BIPIC Series 1 Senior Preferred Shares [Domain] | USD |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuing shares |  | $ 75 |  |  |  |  |  |  |  |  |  |
Fixed interest rate | Medium-term Notes, Maturing September 11, 2028 [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  | 4.20% |  | 4.20% |  |  |  |  |  |
Fixed interest rate | Medium-term Notes, Maturing October 9, 2029 [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  | 3.40% |  | 3.40% |  |  |  |  |  |
Fixed interest rate | Medium Term Notes, Public - Canadian - Maturing February 22, 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  | 3.30% |  | 3.30% |  |  |  |  |  |
Fixed interest rate | Medium-Term Notes, Public - Canadian - Maturing February 22, 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  | 3.30% |  | 3.30% |  |  |  |  |  |
Fixed interest rate | Medium-term Notes, Maturing September 1, 2032 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  | 2.90% |  | 2.90% |  |  |  |  |  |
Fixed interest rate | Subordinated Notes, Maturing May 24, 2081 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  | 5.00% |  | 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 11, 2028 [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [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 October 30, 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [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] | Medium-term Notes, Maturing October 9, 2029 [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [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 1, 2032 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [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] | Subordinated Notes, Maturing May 24, 2081 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  | $ 250 |  |  |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Fixed interest rate | Medium-term Notes, Maturing September 11, 2028 [Domain] | Canada, Dollars |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  |  |  |  |  | 4.20% |
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Fixed interest rate | Medium-term Notes, Maturing October 9, 2029 [Domain] | Canada, Dollars |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  |  |  |  |  | 3.40% | 3.40%
Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Pty Ltd and Brookfield Infrastructure Finance Limited (Debt Issuers) [Member] | Fixed interest rate | Medium-term Notes, Maturing October 9, 2029 [Domain] | USD |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [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] | Fixed interest rate | Medium-term Notes, Maturing September 1, 2032 | Canada, Dollars |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [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] | Fixed interest rate | Medium-term Notes, Maturing September 1, 2032 | USD |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [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] | Fixed interest rate | Subordinated Notes, Maturing May 24, 2081 | USD |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  |  |  | 5.00% |  |  |
Interest Rate And Cross Currency Interest Rate Swaps [Member] | 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 information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  |  |  | $ 92

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