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PARTNERSHIP CAPITAL - Additional Information (Details) $ / shares in Units, $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 17, 2019 USD ($) $ / shares shares | Jul. 31, 2019 shares | Jun. 30, 2020 USD ($) shares | Jun. 30, 2019 USD ($) shares | Jun. 30, 2020 USD ($) day shares | Jun. 30, 2019 USD ($) shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) shares | Jul. 29, 2020 CAD ($) shares | Mar. 31, 2020 shares
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Repurchase Of Equity | $ |  |  |  |  |  | $ 29,000,000 |  |  |  |
Proceeds from issuing shares | $ |  |  | $ 3,000,000 | $ 2,000,000 | $ 5,000,000 | 4,000,000 |  |  |  |
Volume weighted average of trading price, number of trading days | day |  |  |  |  | 5 |  |  |  |  |
Issue of equity | $ |  |  | $ 3,000,000 | $ 2,000,000 | $ 5,000,000 | $ 4,000,000 |  |  |  |
Brookfield Secondary Offering, Shares Issued | shares |  |  |  |  |  |  |  |  | 5,000,000 |
Preferred Unitholders Capital [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred Units, Units Repurchased | shares |  |  |  |  |  | 100,000 |  |  |  |
Repurchase of Preferred Equity | $ |  |  |  |  | $ 0 | $ 1,000,000 | $ 1,000,000 |  |  |
Special General Partner | Issued capital [member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding | shares |  |  | 1,600,000 | 1,600,000 | 1,600,000 | 1,600,000 |  |  |  |
Partners' Capital Account, Units, Treasury Units Purchased1 | shares |  |  |  |  | 0 |  | 0 |  |  |
Repurchase Of Equity | $ |  |  |  |  | $ 0 |  | $ 0 |  |  |
Issued for cash | shares |  |  |  |  | 0 |  | 0 |  |  |
Issue of equity | $ |  |  |  |  | $ 0 |  | $ 0 |  |  |
Class A Shares of BIPC conversion, shares | shares |  |  |  |  | 0 |  | 0 |  |  |
Class A Shares of BIPC conversion, value | $ |  |  |  |  | $ 0 |  | $ 0 |  |  |
Limited Partners 1 [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Repurchase Of Equity | $ |  |  |  |  |  | $ 28,000,000 |  |  |  |
Class A shares to Limited Partner Units, Conversion Ratio | shares |  |  | 1 |  | 1 |  |  |  |  |
Issue of equity | $ |  |  | $ 3,000,000 | $ 2,000,000 | $ 5,000,000 | $ 4,000,000 |  |  |  |
Exchange LP Units to Limited Partner Units, Conversion Ratio | shares |  |  | 1 |  | 1 |  |  |  |  |
Limited Partners 1 [Member] | Issued capital [member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding | shares |  |  | 294,700,000 | 279,700,000 | 294,100,000 | 278,900,000 |  |  |  |
Partners' Capital Account, Units, Treasury Units Purchased1 | shares |  |  |  |  |  | 800,000 | (800,000) |  |  |
Repurchase Of Equity | $ |  |  |  |  |  | $ 28,000,000 | $ 28,000,000 |  |  |
Share Repurchase Related Cost | $ |  |  |  |  |  | $ 1,000,000 |  |  |  |
Issued for cash | shares | 13,500,000 |  |  |  | 200,000 |  | 13,800,000 |  |  |
Number of share issued, price per share | $ / shares | $ 42.5 |  |  |  |  |  |  |  |  |
Proceeds from issuing shares | $ | $ 575,000,000 |  |  |  |  |  |  |  |  |
Share issue related cost | $ | 24,000,000 |  |  |  |  |  |  |  |  |
Dividend reinvestment plan, unit issued (less than) | shares |  |  |  |  | 200,000 | 200,000 |  |  |  |
Dividend reinvestment plan, proceeds | $ |  |  |  |  | $ 5,000,000 | $ 4,000,000 |  |  |  |
Issue of equity | $ |  |  | $ 3,000,000 | $ 2,000,000 | $ 5,000,000 | $ 4,000,000 | $ 559,000,000 |  |  |
Class A Shares of BIPC conversion, shares | shares |  |  |  |  | 1,300,000 |  | 0 |  |  |
Class A Shares of BIPC conversion, value | $ |  |  |  |  | $ 18,000,000 |  | $ 0 |  |  |
Non-controlling Interest - Redeemable Partnership Units [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Increase (decrease) in equity | $ | 8,000,000 |  |  |  |  |  |  |  |  |
Non-controlling Interest - Redeemable Partnership Units [Member] | Issued capital [member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding | shares |  |  | 121,900,000 | 115,800,000 | 121,900,000 | 115,800,000 |  |  |  |
Issued for cash | shares |  | 6,100,000 |  |  | 0 |  | 6,100,000 |  |  |
Proceeds from issuing shares | $ | $ 250,000,000 |  |  |  |  |  |  |  |  |
Issue of equity | $ |  |  |  |  | $ 0 |  | $ 250,000,000 |  |  |
Brookfield Secondary Offering, Proceeds | $ |  |  |  |  |  |  |  |  | $ 305 |
Non-controlling Interest - Class A Shares, equity [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Class A shares to Limited Partner Units, Conversion Ratio | shares |  |  | 1 |  | 1 |  |  |  |  |
Non-controlling Interest - Class A Shares, equity [Member] | Issued capital [member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Number Of Shares Issued1, non cash | shares |  |  |  |  | 46,300,000 |  | 0 |  |  |
Class A Shares of BIPC conversion, shares | shares |  |  |  |  | (1,300,000) |  | 0 |  |  |
Class A Shares of BIPC conversion, value | $ |  |  |  |  | $ 18,000,000 |  | $ 0 |  |  |
Non-controlling Interest - Exchange LP Units, equity [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Exchange LP Units to Limited Partner Units, Conversion Ratio | shares |  |  | 1 |  | 1 |  |  |  |  |
Non-controlling Interest - Exchange LP Units, equity [Member] | Issued capital [member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Issued for cash | shares |  |  |  |  |  |  |  | 5,700,000 |  |
Issue of equity | $ |  |  |  |  |  |  |  | $ 232,000,000 |  |
Exchange LP unit special distribution, value | $ |  |  |  |  | $ 0 |  |  |  |  |
Exchange LP unit special distribution, shares | shares |  |  |  |  | 100,000 |  | 0 |  |  |
Exchange LP unit conversion, shares | shares |  |  |  |  | (200,000) | 3,100,000 | (3,200,000) |  |  |
Exchange LP unit conversion, value | $ |  |  |  |  | $ (2,000,000) | $ (51,000,000) | $ 53,000,000 |  |  |
Bottom of range | Limited Partners 1 [Member] | Issued capital [member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Partners' Capital Account, Units, Treasury Units Purchased1 | shares |  |  |  |  | 0 |  |  |  |  |
Repurchase Of Equity | $ |  |  |  |  | $ 0 |  |  |  |  |
Bottom of range | Non-controlling Interest - Exchange LP Units, equity [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Brookfield Infrastructure Corporation, Special Distribution, Exchange LP Units, Conversion Ratio | shares |  |  |  |  |  |  |  |  |  | 1
Top of range | Limited Partners 1 [Member] | Issued capital [member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Partners' Capital Account, Units, Treasury Units Purchased1 | shares |  |  |  |  | 100,000 |  |  |  |  |
Repurchase Of Equity | $ |  |  |  |  | $ 1,000,000 |  |  |  |  |
Top of range | Non-controlling Interest - Exchange LP Units, equity [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Partnership Units [Line Items] |  |  |  |  |  |  |  |  |  |
Brookfield Infrastructure Corporation, Special Distribution, Exchange LP Units, Conversion Ratio | shares |  |  |  |  |  |  |  |  |  | 9

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