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PARTNERSHIP CAPITAL - Capital Categories (Details) - USD ($) shares in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 17, 2019 | Jul. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Changes in equity [abstract] |  |  |  |  |  |  |  |
Balance as |  | $ 16,233.0 | $ 19,058.0 | $ 16,275.0 | $ 22,177.0 | $ 14,668.0 | $ 14,668.0 |
Unit issuance |  |  | 3.0 | 2.0 | 5.0 | 4.0 |  |
Repurchase Of Equity |  |  |  |  |  | (29.0) |  |
Balance as |  |  | 18,743.0 | 16,233.0 | 18,743.0 | 16,233.0 | 22,177.0 | $ 14,668.0
Non-controlling Interest - Redeemable Partnership Units [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Balance as |  | 1,815.0 | 1,606.0 | 1,863.0 | 2,039.0 | 1,823.0 | 1,823.0 |
Balance as |  |  | 1,520.0 | 1,815.0 | 1,520.0 | 1,815.0 | 2,039.0 | 1,823.0
Non-controlling Interest - Class A Shares, equity [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Balance as |  |  | 625.0 |  | 0.0 |  |  |
Balance as |  |  | 576.0 |  | 576.0 |  | 0.0 |
Limited Partners 1 [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Balance as |  | 4,521.0 | 4,008.0 | 4,633.0 | 5,048.0 | 4,513.0 | 4,513.0 |
Unit issuance |  |  | 3.0 | 2.0 | 5.0 | 4.0 |  |
Repurchase Of Equity |  |  |  |  |  | (28.0) |  |
Balance as |  |  | 3,823.0 | 4,521.0 | 3,823.0 | 4,521.0 | 5,048.0 | 4,513.0
Non-controlling Interest - Exchange LP Units, equity [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Balance as |  | $ 21.0 | 14.0 | 23.0 | 18.0 | 71.0 | 71.0 |
Balance as |  |  | $ 12.0 | 21.0 | $ 12.0 | $ 21.0 | $ 18.0 | $ 71.0
Issued capital [member] | Non-controlling Interest - Redeemable Partnership Units [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Opening balance |  |  |  |  | 121.9 | 115.8 | 115.8 |
Issued for cash |  | 6.1 |  |  | 0.0 |  | 6.1 |
Ending balance |  |  | 121.9 |  | 121.9 |  | 121.9 | 115.8
Balance as |  | $ 2,078.0 | $ 2,328.0 | 2,078.0 | $ 2,328.0 | $ 2,078.0 | $ 2,078.0 |
Unit issuance |  |  |  |  | 0.0 |  | 250.0 |
Balance as |  |  | $ 2,328.0 | 2,078.0 | $ 2,328.0 | $ 2,078.0 | $ 2,328.0 | $ 2,078.0
Issued capital [member] | Non-controlling Interest - Class A Shares, equity [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Opening balance |  |  |  |  | 0.0 | 0.0 | 0.0 |
Non cash issuance |  |  |  |  | 46.3 |  | 0.0 |
Class A Shares of BIPC conversion, shares |  |  |  |  | (1.3) |  | 0.0 |
Ending balance |  |  | 45.0 |  | 45.0 |  | 0.0 | 0.0
Balance as |  |  |  |  | $ 0.0 | $ 0.0 | $ 0.0 |
Class A Shares of BIPC conversion, value |  |  |  |  | 18.0 |  | 0.0 |
Balance as |  |  | $ (18.0) |  | $ (18.0) |  | $ 0.0 | $ 0.0
Issued capital [member] | Special General Partner and Limited Partner |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Opening balance |  |  |  |  | 295.1 | 278.9 | 278.9 |
Issued for cash |  |  |  |  | 0.2 |  | 13.8 |
Units converted from Exchange LP units |  |  |  |  | 0.2 |  | 3.2 |
Class A Shares of BIPC conversion, shares |  |  |  |  | 1.3 |  | 0.0 |
Partners' Capital Account, Units, Treasury Units Purchased1 |  |  |  |  | 0.0 |  | (0.8) |
Ending balance |  |  | 296.8 |  | 296.8 |  | 295.1 | 278.9
Balance as |  |  |  |  | $ 5,514.0 | $ 4,930.0 | $ 4,930.0 |
Unit issuance |  |  |  |  | 5.0 |  | 559.0 |
Units converted from Exchange LP units, value |  |  |  |  | 2.0 |  | 53.0 |
Class A Shares of BIPC conversion, value |  |  |  |  | 18.0 |  | 0.0 |
Repurchase Of Equity |  |  |  |  | 0.0 |  | (28.0) |
Balance as |  |  | $ 5,539.0 |  | $ 5,539.0 |  | $ 5,514.0 | $ 4,930.0
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 |
Partners' Capital Account, Units, Treasury Units Purchased1 |  |  |  |  | 0.0 |  | 0.0 |
Ending balance |  |  | 1.6 |  | 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 |
Repurchase Of Equity |  |  |  |  | 0.0 |  | 0.0 |
Balance as |  |  | $ 19.0 |  | $ 19.0 |  | $ 19.0 | $ 19.0
Issued capital [member] | Limited Partners 1 [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Opening balance |  |  |  |  | 293.5 | 277.3 | 277.3 |
Issued for cash | 13.5 |  |  |  | 0.2 |  | 13.8 |
Units converted from Exchange LP units |  |  |  |  | 0.2 |  | 3.2 |
Class A Shares of BIPC conversion, shares |  |  |  |  | 1.3 |  | 0.0 |
Partners' Capital Account, Units, Treasury Units Purchased1 |  |  |  |  |  | 0.8 | (0.8) |
Ending balance |  |  | 295.2 |  | 295.2 |  | 293.5 | 277.3
Balance as |  | $ 4,938.0 | $ 5,498.0 | 4,935.0 | $ 5,495.0 | $ 4,911.0 | $ 4,911.0 |
Unit issuance |  |  | 3.0 | 2.0 | 5.0 | 4.0 | 559.0 |
Units converted from Exchange LP units, value |  |  |  |  | 2.0 |  | 53.0 |
Class A Shares of BIPC conversion, value |  |  |  |  | 18.0 |  | 0.0 |
Repurchase Of Equity |  |  |  |  |  | (28.0) | (28.0) |
Balance as |  |  | $ 5,520.0 | $ 4,938.0 | $ 5,520.0 | $ 4,938.0 | $ 5,495.0 | $ 4,911.0
Issued capital [member] | Non-controlling Interest - Exchange LP Units, equity [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Opening balance |  |  |  |  | 1.2 | 4.4 | 4.4 |
Issued for cash |  |  |  |  |  |  |  | 5.7
Exchange LP unit special distribution, shares |  |  |  |  | 0.1 |  | 0.0 |
Exchange LP unit conversion, shares |  |  |  |  | (0.2) | 3.1 | (3.2) |
Ending balance |  |  | 1.1 |  | 1.1 |  | 1.2 | 4.4
Balance as |  |  |  |  | $ 159.0 | $ 212.0 | $ 212.0 |
Unit issuance |  |  |  |  |  |  |  | $ 232.0
Exchange LP unit conversion, value |  |  |  |  | 2.0 | $ 51.0 | (53.0) |
Balance as |  |  | $ 157.0 |  | $ 157.0 |  | $ 159.0 | $ 212.0
Preferred Unitholders Capital [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Opening balance |  |  |  |  | 49.9 | 49.9 | 49.9 |
Ending balance |  |  | 49.9 |  | 49.9 |  | 49.9 | 49.9
Balance as |  |  |  |  | $ 935.0 | $ 936.0 | $ 936.0 |
Repurchase of Preferred Equity |  |  |  |  | 0.0 | $ (1.0) | (1.0) |
Balance as |  |  | $ 935.0 |  | $ 935.0 |  | $ 935.0 | $ 936.0
Bottom of range | Issued capital [member] | Limited Partners 1 [Member] |  |  |  |  |  |  |  |
Changes in equity [abstract] |  |  |  |  |  |  |  |
Partners' Capital Account, Units, Treasury Units Purchased1 |  |  |  |  | 0.0 |  |  |
Repurchase Of Equity |  |  |  |  | $ 0.0 |  |  |

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