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PARTNERSHIP CAPITAL - Capital Categories (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Nov. 30, 2021
Jul. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Changes in equity [abstract]          
Balance as     $ 21,673.0 $ 22,177.0 $ 14,668.0
Unit issuance     2,974.0 [1] 9.0 [2] 809.0
Repurchased and cancelled         (29.0)
Balance as     26,391.0 21,673.0 22,177.0
Limited Partners          
Changes in equity [abstract]          
Balance as     4,233.0 5,048.0 4,513.0
Unit issuance     545.0 [1] 9.0 [2] 559.0
Repurchased and cancelled         (28.0)
Balance as     5,702.0 4,233.0 5,048.0
Non-controlling Interest - Redeemable Partnership Units          
Changes in equity [abstract]          
Balance as     1,687.0 2,039.0 1,823.0
Unit issuance     400.0 [1]   250.0
Balance as     2,408.0 1,687.0 2,039.0
Partners' capital | Inter Pipeline          
Changes in equity [abstract]          
Unit issuance     $ 26.0 $ 0.0 $ 0.0
Partners' capital | Special General Partner and Limited Partner          
Changes in equity [abstract]          
Opening balance (in shares)     297,000,000.0 295,100,000 278,900,000
Issued for cash (in shares)     9,700,000 200,000 13,800,000
Conversion from exchange LP units (in shares)     100,000 300,000 3,200,000
Conversion from BIPC exchangeable shares (in shares)     100,000 1,400,000 0
Repurchased and cancelled (in shares)     0 0 (800,000)
Ending balance (in shares)     306,900,000 297,000,000.0 295,100,000
Balance as     $ 5,545.0 $ 5,514.0 $ 4,930.0
Unit issuance     545.0 9.0 559.0
Conversion from Exchange LP Units     2.0 3.0 53.0
Conversion from BIPC exchangeable shares     1.0 19.0 0.0
Repurchased and cancelled     0.0 0.0 (28.0)
Balance as     $ 6,093.0 $ 5,545.0 $ 5,514.0
Partners' capital | Special General Partner          
Changes in equity [abstract]          
Opening balance (in shares)     1,600,000 1,600,000 1,600,000
Issued for cash (in shares)     0 0 0
Conversion from exchange LP units (in shares)     0 0 0
Conversion from BIPC exchangeable shares (in shares)     0 0 0
Repurchased and cancelled (in shares)     0 0 0
Ending balance (in shares)     1,600,000 1,600,000 1,600,000
Balance as     $ 19.0 $ 19.0 $ 19.0
Unit issuance     0.0 0.0 0.0
Conversion from Exchange LP Units     0.0 0.0 0.0
Conversion from BIPC exchangeable shares     0.0 0.0 0.0
Repurchased and cancelled     0.0 0.0 0.0
Balance as     $ 19.0 $ 19.0 $ 19.0
Partners' capital | Limited Partners          
Changes in equity [abstract]          
Opening balance (in shares)     295,400,000 293,500,000 277,300,000
Issued for cash (in shares) 9,500,000 13,500,000 9,700,000 200,000 13,800,000
Conversion from exchange LP units (in shares)     100,000 300,000 3,200,000
Conversion from BIPC exchangeable shares (in shares)     100,000 1,400,000 0
Repurchased and cancelled (in shares)     0 (100,000) (800,000)
Ending balance (in shares)     305,300,000 295,400,000 293,500,000
Balance as     $ 5,526.0 $ 5,495.0 $ 4,911.0
Unit issuance     545.0 [1] 9.0 [2] 559.0
Conversion from Exchange LP Units     2.0 3.0 53.0
Conversion from BIPC exchangeable shares     1.0 19.0 0.0
Repurchased and cancelled     0.0 (0.1) (28.0)
Balance as     $ 6,074.0 $ 5,526.0 $ 5,495.0
Partners' capital | Non-controlling Interest - Redeemable Partnership Units          
Changes in equity [abstract]          
Opening balance (in shares)     121,900,000 121,900,000 115,800,000
Issued for cash (in shares) 7,100,000 6,100,000   0 6,100,000
Ending balance (in shares)     129,000,000.0 121,900,000 121,900,000
Balance as     $ 2,328.0 $ 2,328.0 $ 2,078.0
Unit issuance $ 400.0   400.0 [1] 0.0 250.0
Balance as     $ 2,728.0 $ 2,328.0 $ 2,328.0
Partners' capital | Non-controlling interest— BIPC exchangeable shares          
Changes in equity [abstract]          
Opening balance (in shares)     44,900,000 0 0
Issued for cash (in shares)     2,100,000 0 0
Non-cash issuance (in shares)     0 46,300,000 0
Class A shares of Brookfield infrastructure corporation conversion (in shares)     (100,000) (1,400,000) 0
Units converted From BIPC exchangeable, shares     400,000 0 0
Ending balance (in shares)     73,300,000 44,900,000 0
Balance as     $ (19.0) $ 0.0 $ 0.0
Unit issuance     1,770.0 0.0 0.0
Conversion to units     (1.0) (19.0) 0.0
Units converted from BIPC exchangeable shares, value     5.0 0.0 0.0
Balance as     $ 1,755.0 $ (19.0) $ 0.0
Partners' capital | Non-controlling Interest - Exchange LP Units, equity          
Changes in equity [abstract]          
Opening balance (in shares)     1,000,000.0 1,200,000 4,400,000
Issued for cash (in shares)     0 100,000 0
Issuance of BIPC exchangeable LP units (in shares)     $ 4,100,000 $ 0 $ 0
BIPC exchangeable LP converted to BIPC exchangeable (in shares)     $ (400,000) $ 0 $ 0
Exchange LP conversion (in shares)     (100,000) (300,000) (3,200,000)
Ending balance (in shares)     4,600,000 1,000,000.0 1,200,000
Balance as     $ 156.0 $ 159.0 $ 212.0
Unit issuance     259.0 0.0 0.0
BIPC exchangeable shares     (5.0) 0.0 0.0
Exchange LP Units converted to units     (2.0) (3.0) (53.0)
Balance as     $ 408.0 $ 156.0 $ 159.0
Preferred Unitholders Capital          
Changes in equity [abstract]          
Opening balance (in shares)     57,900,000 49,900,000 49,900,000
Issued for cash (in shares)     8,000,000.0 8,000,000.0 0
Repurchased and cancelled (in shares)     (10,000,000.0) 0 0
Ending balance (in shares)     55,900,000 57,900,000 49,900,000
Balance as     $ 1,130.0 $ 935.0 $ 936.0
Unit issuance     194.0 195.0 0.0
Repurchased and cancelled         (1.0)
Repurchased and cancelled     (186.0) 0.0 (1.0)
Balance as     $ 1,138.0 $ 1,130.0 $ 935.0
[1] Refer to Note 27, Partnership Capital.
[2] Refer to Note 27, Partnership Capital.