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PARTNERSHIP CAPITAL - Additional Information (Details)
$ / shares in Units, shares in Thousands, $ in Millions
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jan. 21, 2021
USD ($)
$ / shares
shares
Nov. 30, 2021
USD ($)
shares
Oct. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2021
USD ($)
shares
Jun. 30, 2022
USD ($)
day
shares
Jun. 30, 2021
USD ($)
shares
Dec. 31, 2021
USD ($)
shares
Nov. 01, 2021
$ / shares
shares
Oct. 01, 2021
shares
Aug. 01, 2021
shares
Dec. 31, 2020
shares
Schedule of Partnership Units [Line Items]                              
Shares issued during period, price per share (dollars per share) | $ / shares                       $ 41.73      
Partnership units issued             $ 4.0 $ 3.0 $ 8.0 $ 6.0          
Share issue related cost       $ 6.0                      
Unit issuance [1]             4.0 3.0 $ 8.0 6.0          
Volume weighted average of trading price, number of trading days | day                 5            
Exchangeable shares issued as a result of the Holding LP Distribution, total (in shares) | shares                       3,200 12,200 26,900  
Exchangeable shares, issuance, value       $ 134.0 $ 502.0 $ 1,140.0                  
Limited partners’ capital                              
Schedule of Partnership Units [Line Items]                              
Unit issuance [1]             $ 4.0 $ 3.0 $ 8.0 $ 6.0          
Preferred unitholders capital                              
Schedule of Partnership Units [Line Items]                              
Number of shares issued (in shares) | shares                 0   8,000        
Unit issuance                 $ 0.0   $ 194.0        
Number of shares outstanding (in shares) | shares             43,900   43,900   55,900       57,900
Preferred unitholders capital | Series 14 Preferred Units                              
Schedule of Partnership Units [Line Items]                              
Number of shares issued (in shares) | shares     12,000                        
Shares issued during period, price per share (dollars per share) | $ / shares     $ 25                        
Partnership units issued $ 220.0 $ 206.0                          
Preferred unitholders capital | Series 14 Preferred Units | Major ordinary share transactions                              
Schedule of Partnership Units [Line Items]                              
Partnership units issued     $ 200.0                        
Quarterly fixed distribution rate     5.00%                        
Share underwriting related cost     $ 6.0                        
Preferred unitholders capital | Series 5 Preferred Units                              
Schedule of Partnership Units [Line Items]                              
Losses on redemption of equity instruments $ 23.0 $ 20.0                          
Limited partners’ capital | Limited partners’ capital                              
Schedule of Partnership Units [Line Items]                              
Weighted average number of shares outstanding (in shares) | shares             458,000 443,300   443,200          
Number of shares issued (in shares) | shares       14,300         200   14,600        
Shares issued during period, price per share (dollars per share) | $ / shares                       $ 39.10      
Partnership units issued       $ 556.0                      
Share issue related cost       $ 23.0                      
Unit issuance             $ 4.0 [1] $ 3.0 [1] $ 8.0 [1] $ 6.0 [1] $ 545.0        
Stock issued during period, dividend reinvestment plan (in shares) | shares                 200 200          
Dividend reinvestment plan, proceeds                 $ 8.0 $ 6.0          
Number of shares outstanding (in shares) | shares             458,100   458,100   457,900       443,100
Limited partners’ capital | Non-controlling Interest - Exchange LP Units, equity                              
Schedule of Partnership Units [Line Items]                              
Unit issuance                 $ 0.0   $ 259.0        
Number of shares outstanding (in shares) | shares             6,500   6,500   6,900       1,500
Issuance of exchangeable LP units, shares (in shares) | shares                 0   6,200        
Exchange LP unit conversion, shares (in shares) | shares                 100 100 200        
Exchange LP unit conversion, value                 $ (2.0)   $ (2.0)        
Exchange LP Unit conversion, value                   $ 1.0          
Exchangeable LP converted to exchangeable, value                 $ 0.3   $ (5.0)        
Limited partners’ capital | Non-controlling interest – BIPC exchangeable shares                              
Schedule of Partnership Units [Line Items]                              
Number of shares outstanding (in shares) | shares             110,300   110,300   110,000       67,400
Class A shares of BIPC conversion, shares, rounded (in shares) | shares                 100 100          
Units converted from Class A share of BIPC, value, rounded                 $ 1.0 $ 1.0          
Exchangeable LP converted to exchangeable, value                 $ (4.0)            
Limited partners’ capital | General Partner                              
Schedule of Partnership Units [Line Items]                              
Weighted average number of shares outstanding (in shares) | shares                 2,400 2,400          
Number of shares issued (in shares) | shares                 0   0        
Unit issuance                 $ 0.0   $ 0.0        
Number of shares outstanding (in shares) | shares             2,400   2,400   2,400       2,400
Limited partners’ capital | Redeemable Partnership Units held by Brookfield                              
Schedule of Partnership Units [Line Items]                              
Weighted average number of shares outstanding (in shares) | shares             193,600 182,900 193,600 182,900          
Number of shares issued (in shares) | shares       10,700         0   10,700        
Unit issuance       $ 400.0         $ 0.0   $ 400.0        
Number of shares outstanding (in shares) | shares                     193,600       182,900
[1] Refer to Note 16 Partnership Capital.