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PARTNERSHIP CAPITAL - Capital Categories (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Changes in equity [abstract] |  |  |  |  |
Balance as | $ 21,952.0 | $ 19,058.0 | $ 21,673.0 | $ 22,177.0 | $ 22,177.0
Unit issuance | 3.0 | 3.0 | 6.0 |  |
Repurchase Of Equity |  |  |  | 5.0 |
Balance as | 21,451.0 | 18,743.0 | 21,451.0 | 18,743.0 | 21,673.0
Non-controlling Interest - Redeemable Partnership Units [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Balance as | 1,643.0 | 1,606.0 | 1,687.0 | 2,039.0 | 2,039.0
Balance as | 1,703.0 | 1,520.0 | 1,703.0 | 1,520.0 | 1,687.0
Non-controlling Interest - Class A Shares, equity [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Balance as | 622.0 | 625.0 | 638.0 | 0.0 | 0.0
Balance as | 643.0 | 576.0 | 643.0 | 576.0 | 638.0
Limited Partners 1 [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Balance as | 4,129.0 | 4,008.0 | 4,233.0 | 5,048.0 | 5,048.0
Unit issuance | 3.0 | 3.0 | 6.0 |  |
Repurchase Of Equity |  |  |  | 5.0 |
Balance as | 4,275.0 | 3,823.0 | 4,275.0 | 3,823.0 | 4,233.0
Non-controlling Interest - Exchange LP Units, equity [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Balance as | 11.0 | 14.0 | 12.0 | 18.0 | 18.0
Balance as | $ 11.0 | 12.0 | $ 11.0 | $ 12.0 | $ 12.0
Issued capital [member] | Non-controlling Interest - Redeemable Partnership Units [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Opening balance |  |  | 121.9 | 121.9 | 121.9
Issued for cash |  |  | 0.0 |  | 0.0
Ending balance | 121.9 |  | 121.9 |  | 121.9
Balance as | $ 2,328.0 | 2,328.0 | $ 2,328.0 | $ 2,328.0 | $ 2,328.0
Unit issuance |  |  | 0.0 |  | 0.0
Balance as | $ 2,328.0 | 2,328.0 | $ 2,328.0 | $ 2,328.0 | $ 2,328.0
Issued capital [member] | Non-controlling Interest - Class A Shares, equity [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Opening balance |  |  | 44.9 | 0.0 | 0.0
Non cash issuance |  |  | 0.0 |  | 46.3
Class A Shares of BIPC conversion, shares |  |  | 0.0 |  | 1.4
Ending balance | 44.9 |  | 44.9 |  | 44.9
Balance as |  |  | $ (19.0) | $ 0.0 | $ 0.0
Class A Shares of BIPC conversion, value |  |  | 0.0 |  | 19.0
Balance as | $ (19.0) |  | $ (19.0) |  | $ (19.0)
Issued capital [member] | Special General Partner and Limited Partner |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Opening balance |  |  | 297.0 | 295.1 | 295.1
Issued for cash |  |  | 0.1 |  | 0.2
Units converted from Exchange LP units |  |  | 0.0 |  | 0.3
Class A Shares of BIPC conversion, shares |  |  | 0.0 |  | 1.4
Ending balance | 297.1 |  | 297.1 |  | 297.0
Balance as |  |  | $ 5,545.0 | $ 5,514.0 | $ 5,514.0
Unit issuance |  |  | 6.0 |  | 9.0
Units converted from Exchange LP units, value |  |  | 0.0 |  | 3.0
Class A Shares of BIPC conversion, value |  |  | 0.0 |  | 19.0
Balance as | $ 5,551.0 |  | $ 5,551.0 |  | $ 5,545.0
Issued capital [member] | Special General Partner |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Opening balance |  |  | 1.6 | 1.6 | 1.6
Issued for cash |  |  | 0.0 |  | 0.0
Units converted from Exchange LP units |  |  | 0.0 |  | 0.0
Class A Shares of BIPC conversion, shares |  |  | 0.0 |  | 0.0
Ending balance | 1.6 |  | 1.6 |  | 1.6
Balance as |  |  | $ 19.0 | $ 19.0 | $ 19.0
Unit issuance |  |  | 0.0 |  | 0.0
Units converted from Exchange LP units, value |  |  | 0.0 |  | 0.0
Class A Shares of BIPC conversion, value |  |  | 0.0 |  | 0.0
Balance as | $ 19.0 |  | $ 19.0 |  | $ 19.0
Issued capital [member] | Limited Partners 1 [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Opening balance |  |  | 295.4 | 293.5 | 293.5
Issued for cash |  |  | 0.1 |  | 0.2
Units converted from Exchange LP units |  |  | 0.0 |  | 0.3
Class A Shares of BIPC conversion, shares |  |  | 0.0 |  | 1.4
Ending balance | 295.5 |  | 295.5 |  | 295.4
Balance as | $ 5,529.0 | 5,498.0 | $ 5,526.0 | $ 5,495.0 | $ 5,495.0
Unit issuance | 3.0 | 3.0 | 6.0 |  | 9.0
Units converted from Exchange LP units, value |  |  | 0.0 |  | 3.0
Class A Shares of BIPC conversion, value |  |  | 0.0 |  | 19.0
Repurchase Of Equity |  |  |  | 5.0 |
Balance as | $ 5,532.0 | $ 5,520.0 | $ 5,532.0 | $ 5,520.0 | $ 5,526.0
Issued capital [member] | Non-controlling Interest - Exchange LP Units, equity [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Opening balance |  |  | 1.0 | 1.2 | 1.2
Exchange LP unit special distribution, shares |  |  | 0.0 |  | 0.1
Exchange LP unit conversion, shares |  |  | 0.0 |  | (0.3)
Ending balance | 1.0 |  | 1.0 |  | 1.0
Balance as |  |  | $ 156.0 | $ 159.0 | $ 159.0
Exchange LP unit conversion, value |  |  | 0.0 |  | (3.0)
Balance as | $ 156.0 |  | $ 156.0 |  | $ 156.0
Preferred Unitholders Capital [Member] |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |
Opening balance |  |  | 57.9 | 49.9 | 49.9
Issued for cash |  |  | 8.0 |  | 8.0
Ending balance | 65.9 |  | 65.9 |  | 57.9
Balance as |  |  | $ 1,130.0 | $ 935.0 | $ 935.0
Unit issuance |  |  | 194.0 |  | 195.0
Balance as | $ 1,324.0 |  | $ 1,324.0 |  | $ 1,130.0

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