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PARTNERSHIP CAPITAL - Capital Categories (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 21, 2022
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Schedule of Partnership Units [Line Items]            
Beginning balance   $ 34,234 $ 29,775 $ 35,540 $ 29,853 $ 29,853
Unit issuance   3 [1] 3 [2] 145 [3] 5 [4]  
Units repurchased and cancelled     (29) [2] (113) [3] (29) [4]  
Ending balance   $ 32,523 29,649 $ 32,523 $ 29,649 $ 35,540
Limited partners’ capital | Non-controlling interest – BIPC exchangeable shares and class A.2 exchangeable shares | Exchangeable share            
Schedule of Partnership Units [Line Items]            
Opening balance (in shares)       119,982,167    
Ending balance (in shares)   123,005,386   123,005,386   119,982,167
Limited partners’ capital | Non-controlling interest – BIPC exchangeable shares and class A.2 exchangeable shares | Class exchangeable shares            
Schedule of Partnership Units [Line Items]            
Opening balance (in shares)       13,012,789    
Ending balance (in shares)   13,012,789   13,012,789   13,012,789
Perpetual subordinated notes            
Schedule of Partnership Units [Line Items]            
Opening balance (in shares)       293,000,000 293,000,000 293,000,000
Number of shares issued (in shares) 293,000,000          
Ending balance (in shares)   293,000,000   293,000,000   293,000,000
Preferred unitholders capital            
Schedule of Partnership Units [Line Items]            
Beginning balance       $ 729 $ 918 $ 918
Opening balance (in shares)       33,922,785 43,901,312 43,901,312
Units repurchased and cancelled       $ 0   $ (189)
Units repurchased and cancelled (in shares)       0   (9,978,527)
Ending balance   $ 729   $ 729   $ 729
Ending balance (in shares)   33,922,785   33,922,785   33,922,785
General partner | Limited partners’ capital            
Schedule of Partnership Units [Line Items]            
Beginning balance       $ 19 $ 19 $ 19
Opening balance (in shares)       2,400,631 2,400,631 2,400,631
Ending balance   $ 19   $ 19   $ 19
Ending balance (in shares)   2,400,631   2,400,631   2,400,631
Limited Partners | Limited partners’ capital            
Schedule of Partnership Units [Line Items]            
Beginning balance       $ 6,199 $ 6,210 $ 6,210
Opening balance (in shares)       460,488,788 461,855,350 461,855,350
Unit issuance       $ 6   $ 11
Number of shares issued (in shares)       164,207   330,047
Units repurchased and cancelled       $ (40)   $ (25)
Units repurchased and cancelled (in shares)       (2,982,920)   (1,877,183)
Conversions       $ 0   $ 3
Conversions (in shares)       38,379   180,574
Ending balance   $ 6,165   $ 6,165   $ 6,199
Ending balance (in shares)   457,708,454   457,708,454   460,488,788
Redeemable Partnership Units held by Brookfield            
Schedule of Partnership Units [Line Items]            
Beginning balance   $ 1,917 1,876 $ 2,017 $ 1,926 $ 1,926
Ending balance   1,834 $ 1,830 1,834 1,830 2,017
Redeemable Partnership Units held by Brookfield | Limited partners’ capital            
Schedule of Partnership Units [Line Items]            
Beginning balance       $ 2,628 $ 2,628 $ 2,628
Opening balance (in shares)       190,299,956 190,299,956 190,299,956
Ending balance   $ 2,628   $ 2,628   $ 2,628
Ending balance (in shares)   190,299,956   190,299,956   190,299,956
BIPC exchangeable shares and class A.2 exchangeable shares | Limited partners’ capital            
Schedule of Partnership Units [Line Items]            
Beginning balance       $ 2,554 $ 2,514 $ 2,514
Opening balance (in shares)       132,994,956 132,051,909 132,051,909
Unit issuance       $ 139   $ 38
Number of shares issued (in shares)       2,982,920   833,272
Conversions       $ 1   $ 2
Conversions (in shares)       40,299   109,775
Ending balance   $ 2,694   $ 2,694   $ 2,554
Ending balance (in shares)   136,018,175   136,018,175   132,994,956
Non-controlling interest - exchange LP units, equity | Limited partners’ capital            
Schedule of Partnership Units [Line Items]            
Beginning balance       $ 384 $ 388 $ 388
Opening balance (in shares)       5,447,803 5,738,152 5,738,152
Conversions       $ (1) $ (1) $ (4)
Conversions (in shares)       (78,678)   (290,349)
Ending balance   $ 383   $ 383   $ 384
Ending balance (in shares)   5,369,125   5,369,125   5,447,803
[1] Refer to Note 16, Partnership Capital.
[2] Refer to Note 16, Partnership Capital.
[3] Refer to Note 16, Partnership Capital.
[4] Refer to Note 16, Partnership Capital.