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PARTNERSHIP CAPITAL - Capital Categories (Details) shares in Millions, $ in Millions, $ in Millions |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 29, 2020 CAD ($) shares | Oct. 16, 2018 USD ($) shares | Jul. 31, 2019 shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) shares
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Balance as |  |  |  |  | $ 22,177 |  | $ 14,668 |  | $ 13,474 |
Unit issuance | [1] |  |  |  | 9 |  | 809 |  | 588 |
Unit repurchases | [1] |  |  |  |  |  | (29) |  | (31) |
Balance as |  |  |  |  | 21,673 |  | 22,177 |  | 14,668 |
Limited Partners |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Balance as |  |  |  |  | 5,048 |  | 4,513 |  | 4,967 |
Unit issuance | [1] |  |  |  | 9 |  | 559 |  | 14 |
Unit repurchases | [1] |  |  |  |  |  | (28) |  | (30) |
Balance as |  |  |  |  | 4,233 |  | 5,048 |  | 4,513 |
Non-Controlling Interest—Redeemable Partnership Units held by Brookfield |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Balance as |  |  |  |  | 2,039 |  | 1,823 |  | 2,012 |
Unit issuance | [1] |  |  |  | 0 |  | 250 |  |  |
Balance as |  |  |  |  | $ 1,687 |  | $ 2,039 |  | $ 1,823 |
Partners' capital | Special General Partner and Limited Partner |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Opening balance (in shares) | shares |  |  |  |  | 295.1 |  | 278.9 |  | 278.2 |
Issued for cash (in shares) | shares |  |  |  |  | 0.2 |  | 13.8 |  | 0.3 |
Conversion from Exchange LP Units (in shares) | shares |  |  |  |  | 0.3 |  | 3.2 |  | 1.3 |
Conversion from BIPC exchangeable shares (in shares) | shares |  |  |  |  | 1.4 |  | 0.0 |  | 0.0 |
Repurchased and cancelled (in shares) | shares |  |  |  |  | 0.0 |  | 0.8 |  | 0.9 |
Ending balance (in shares) | shares |  |  |  |  | 297.0 |  | 295.1 |  | 278.9 |
Balance as |  |  |  |  | $ 5,514 |  | $ 4,930 |  | $ 4,926 |
Unit issuance |  |  |  |  | 9 |  | 559 |  | 14 |
Conversion from Exchange LP Units |  |  |  |  | 3 |  | 53 |  | 20 |
Conversion from BIPC exchangeable shares |  |  |  |  | 19 |  | 0 |  | 0 |
Unit repurchases |  |  |  |  | 0 |  | (28) |  | (30) |
Balance as |  |  |  |  | $ 5,545 |  | $ 5,514 |  | $ 4,930 |
Partners' capital | Special General Partner |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Opening balance (in shares) | shares |  |  |  |  | 1.6 |  | 1.6 |  | 1.6 |
Issued for cash (in shares) | shares |  |  |  |  | 0.0 |  | 0.0 |  | 0.0 |
Conversion from Exchange LP Units (in shares) | shares |  |  |  |  | 0.0 |  | 0.0 |  | 0.0 |
Conversion from BIPC exchangeable shares (in shares) | shares |  |  |  |  | 0.0 |  | 0.0 |  | 0.0 |
Repurchased and cancelled (in shares) | shares |  |  |  |  | 0.0 |  | 0.0 |  | 0.0 |
Ending balance (in shares) | shares |  |  |  |  | 1.6 |  | 1.6 |  | 1.6 |
Balance as |  |  |  |  | $ 19 |  | $ 19 |  | $ 19 |
Unit issuance |  |  |  |  | 0 |  | 0 |  | 0 |
Conversion from Exchange LP Units |  |  |  |  | 0 |  | 0 |  | 0 |
Conversion from BIPC exchangeable shares |  |  |  |  | 0 |  | 0 |  | 0 |
Unit repurchases |  |  |  |  | 0 |  | 0 |  | 0 |
Balance as |  |  |  |  | $ 19 |  | $ 19 |  | $ 19 |
Partners' capital | Limited Partners |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Opening balance (in shares) | shares |  |  |  |  | 293.5 |  | 277.3 |  | 276.6 |
Issued for cash (in shares) | shares |  |  |  | 13.5 | 0.2 |  | 13.8 |  | 0.3 |
Conversion from Exchange LP Units (in shares) | shares |  |  |  |  | 0.3 |  | 3.2 |  | 1.3 |
Conversion from BIPC exchangeable shares (in shares) | shares |  |  |  |  | 1.4 |  | 0.0 |  | 0.0 |
Repurchased and cancelled (in shares) | shares |  |  |  |  | 0.0 |  | 0.8 |  | 0.9 |
Ending balance (in shares) | shares |  |  |  |  | 295.4 |  | 293.5 |  | 277.3 |
Balance as |  |  |  |  | $ 5,495 |  | $ 4,911 |  | $ 4,907 |
Unit issuance | [1] |  |  |  | 9 |  | 559 |  | 14 |
Conversion from Exchange LP Units |  |  |  |  | 3 |  | 53 |  | 20 |
Conversion from BIPC exchangeable shares |  |  |  |  | 19 |  | 0 |  | 0 |
Unit repurchases |  |  |  |  | 0 |  | (28) | [1] | (30) | [1]
Balance as |  |  |  |  | $ 5,526 |  | $ 5,495 |  | $ 4,911 |
Partners' capital | Non-Controlling Interest—Redeemable Partnership Units held by Brookfield |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Opening balance (in shares) | shares |  |  |  |  | 121.9 |  | 115.8 |  | 115.8 |
Issued for cash (in shares) | shares |  |  |  | 6.1 | 0.0 |  | 6.1 |  | 0.0 |
Ending balance (in shares) | shares |  |  |  |  | 121.9 |  | 121.9 |  | 115.8 |
Balance as |  |  |  |  | $ 2,328 |  | $ 2,078 |  | $ 2,078 |
Unit issuance |  |  |  |  | 0 | [1] | 250 | [1] | 0 |
Balance as |  |  |  |  | $ 2,328 |  | $ 2,328 |  | $ 2,078 |
Partners' capital | Non-controlling interest— BIPC exchangeable shares |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Opening balance (in shares) | shares |  |  |  |  | 0.0 |  | 0.0 |  | 0.0 |
Issued for cash (in shares) | shares |  | 5.0 |  |  |  |  |  |  |  |
Non-cash issuance (in shares) | shares |  |  |  |  | 46.3 |  | 0.0 |  | 0.0 |
Class A shares of Brookfield Infrastructure Corporation conversion (in shares) | shares |  |  |  |  | (1.4) |  | 0.0 |  | 0.0 |
Ending balance (in shares) | shares |  |  |  |  | 44.9 |  | 0.0 |  | 0.0 |
Balance as |  |  |  |  | $ 0 |  | $ 0 |  | $ 0 |
Unit issuance |  | $ 305 |  |  |  |  |  |  |  |
BIPC exchangeable shares conversion |  |  |  |  | (19) |  | 0 |  | 0 |
Balance as |  |  |  |  | $ (19) |  | $ 0 |  | $ 0 |
Partners' capital | Non-controlling interest— Exchange LP Units |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Opening balance (in shares) | shares |  |  |  |  | 1.2 |  | 4.4 |  | 0.0 |
Issued for cash (in shares) | shares |  |  | 5.7 |  | 0.1 |  | 0.0 |  | 5.7 |
Exchange LP conversion (in shares) | shares |  |  |  |  | (0.3) |  | (3.2) |  | (1.3) |
Ending balance (in shares) | shares |  |  |  |  | 1.0 |  | 1.2 |  | 4.4 |
Balance as |  |  |  |  | $ 159 |  | $ 212 |  | $ 0 |
Unit issuance |  |  | $ 232 |  | 0 |  | 0 |  | 232 |
Exchange LP conversion |  |  |  |  | (3) |  | (53) |  | (20) |
Balance as |  |  |  |  | $ 156 |  | $ 159 |  | $ 212 |
Preferred Unitholders Capital |  |  |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |  |  |
Opening balance (in shares) | shares |  |  |  |  | 49.9 |  | 49.9 |  | 32.0 |
Issued for cash (in shares) | shares |  |  |  |  | 8.0 |  | 0.0 |  | 18.0 |
Repurchased and cancelled (in shares) | shares |  |  |  |  | 0.0 |  | 0.0 |  | (0.1) |
Ending balance (in shares) | shares |  |  |  |  | 57.9 |  | 49.9 |  | 49.9 |
Balance as |  |  |  |  | $ 935 |  | $ 936 |  | $ 595 |
Unit issuance |  |  |  |  | 195 |  | 0 | [1] | 342 | [1]
Unit repurchases | [1] |  |  |  |  |  | (1) |  | (1) |
Repurchased and cancelled |  |  |  |  | 0 |  | (1) |  | (1) |
Balance as |  |  |  |  | $ 1,130 |  | $ 935 |  | $ 936 |
[1] | Refer to Note 26, Partnership Capital.

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