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SUBSIDIARY PUBLIC ISSUERS - Additional Information (Details) $ / shares in Units, $ / shares in Units, $ in Millions, $ in Millions |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |
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Sep. 01, 2020 CAD ($) | Nov. 06, 2019 CAD ($) | Feb. 05, 2019 USD ($) shares | Feb. 05, 2019 CAD ($) $ / shares shares | Nov. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Nov. 01, 2021 $ / shares | May 24, 2021 | Apr. 07, 2020 CAD ($) | Oct. 07, 2019 CAD ($)
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  | $ 14,902 | $ 14,743 |  |  |  |  |
Shares issued, price per share (usd per share) | $ / shares |  |  |  |  |  |  |  |  | $ 62.70 |  |  |
Partnership units issued, net of costs and repurchases |  |  |  |  |  | $ 1,073 | $ 9 | $ 781 |  |  |  |
Share issue related cost |  |  |  |  | $ 6 |  |  |  |  |  |  |
Medium-term Notes, Maturing September 1, 2032 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) | $ 500 |  |  |  |  |  |  |  |  |  |  |
Amount repaid | $ 450 |  |  |  |  |  |  |  |  |  |  |
Medium-term Notes, Maturing September 11, 2028 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  |  |  |  |  |  | $ 200 |
Medium-term Notes, Maturing October 9, 2029 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount (U.S. Dollars) |  |  |  |  |  |  |  |  |  |  | $ 200 | $ 500
Annual rate |  |  |  |  |  |  |  |  |  |  | 3.40% | 3.50%
Notional amount swapped |  |  |  |  |  |  |  |  |  |  |  | $ 92
Subordinated notes, Maturing 2081 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  |  |  |  |  | 5.00% |  |
Preferred Unitholders Capital |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Issued for cash (in shares) | shares |  |  |  |  |  | 8,000,000.0 | 8,000,000.0 | 0 |  |  |  |
Preferred Unitholders Capital | BIPIC Series 1 Senior Preferred Shares |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Issued for cash (in shares) | shares |  |  | 4,000,000 | 4,000,000 |  |  |  |  |  |  |  |
Shares issued, price per share (usd per share) | $ / shares |  |  |  | $ 25 |  |  |  |  |  |  |  |
Quarterly fixed distribution rate |  |  | 5.85% | 5.85% |  |  |  |  |  |  |  |
Partnership units issued, net of costs and repurchases |  |  | $ 75 | $ 100 |  |  |  |  |  |  |  |
Underwriting related cost |  |  | 2 |  |  |  |  |  |  |  |  |
Share issue related cost |  |  | $ 1 |  |  |  |  |  |  |  |  |
Fixed interest rate | Medium-term Notes, Maturing September 1, 2032 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  | 2.90% |  |  |  |  |  |
Fixed interest rate | Medium-term Notes, Maturing September 11, 2028 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  | 4.20% |  |  |  |  |  |
Fixed interest rate | Medium-term Notes, Maturing October 9, 2029 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  | 3.40% |  |  |  |  |  |
Fixed interest rate | Subordinated notes, Maturing 2081 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  | 5.00% |  |  |  |  |  |
Debt Issuers | Medium-term Notes, Maturing October 9, 2029 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount repaid |  | $ 375 |  |  |  |  |  |  |  |  |  |
Debt Issuers | Fixed interest rate | Medium-term Notes, Maturing September 1, 2032 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate | 2.90% |  |  |  |  |  |  |  |  |  |  |
Debt Issuers | Fixed interest rate | Medium-term Notes, Maturing September 1, 2032 | CAD |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate | 2.90% |  |  |  |  |  |  |  |  |  |  |
Debt Issuers | Fixed interest rate | Medium-term Notes, Maturing September 1, 2032 | USD |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate | 3.90% |  |  |  |  |  |  |  |  |  |  |
Debt Issuers | Fixed interest rate | Medium-term Notes, Maturing September 11, 2028 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  |  |  |  |  |  | 4.20% |
Debt Issuers | Fixed interest rate | Medium-term Notes, Maturing October 9, 2029 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information about consolidated structured entities [line items] |  |  |  |  |  |  |  |  |  |  |  |
Annual rate |  |  |  |  |  |  |  |  |  |  | 3.40% | 3.40%

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