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PARTNERSHIP CAPITAL - Additional Information (Details)
 1 Months Ended 2 Months Ended 12 Months Ended
Feb. 25, 2022
shares
Jan. 21, 2022
USD ($)
Jan. 21, 2021
USD ($)
$ / shares
shares
Sep. 21, 2020
USD ($)
$ / shares
shares
Nov. 30, 2021
USD ($)
shares
Oct. 31, 2021
USD ($)
Jul. 31, 2019
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
day
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Mar. 31, 2022
$ / shares
Nov. 01, 2021
$ / shares
shares
Oct. 01, 2021
shares
Aug. 01, 2021
shares
Apr. 21, 2021
Mar. 31, 2020
shares
Schedule of Partnership Units [Line Items]                                  
Shares issued, price per share (usd per share) | $ / shares                         $ 62.70        
Partnership units issued, net of costs and repurchases                 $ 1,073,000,000 $ 9,000,000 $ 781,000,000            
Share issue related cost         $ 6,000,000                        
Repurchased and cancelled                     $ 29,000,000            
Volume weighted average of trading price, number of trading days | day                 5                
Basic earnings (loss) per share (in dollars per unit) | $ / shares [1]                 $ 1.74 $ 0.35 $ 0.06            
Diluted earnings (loss) per share (in dollars per unit) | $ / shares [1]                 $ 1.74 $ 0.35 $ 0.06            
Exchangeable shares issued as a result of special distribution | shares                         2,100,000 8,100,000 17,900,000   46,300,000
Exchange ratio                               1 1
Issuance of BIPC exchangeable shares         $ 134,000,000 $ 502,000,000   $ 1,140,000,000   $ 0 [2],[3]              
Unit issuance                 $ 2,974,000,000 [4] $ 9,000,000 [3] $ 809,000,000            
BIP Bermuda Holdings I Limited                                  
Schedule of Partnership Units [Line Items]                                  
Proceeds from issue of subordinated liabilities   $ 300,000,000                              
Annual rate   5.125%                              
Preferred Unitholders Capital                                  
Schedule of Partnership Units [Line Items]                                  
Issued for cash (in shares) | shares                 8,000,000.0 8,000,000.0 0            
Repurchased and cancelled                     $ 1,000,000            
Unit issuance                 $ 194,000,000 $ 195,000,000 $ 0            
Repurchased and cancelled (in shares) | shares                 10,000,000.0 0 0            
Repurchased and cancelled                 $ (186,000,000) $ 0 $ (1,000,000)            
Preferred Unitholders Capital | Series 7 Preferred Units                                  
Schedule of Partnership Units [Line Items]                                  
Issued for cash (in shares) | shares 12,000,000                                
Shares issued, price per share (usd per share) | $ / shares                       $ 25          
Preferred Unitholders Capital | Series 5 Preferred Units                                  
Schedule of Partnership Units [Line Items]                                  
Losses on redemption                 20,000,000                
Repurchased and cancelled (in shares) | shares                   0 100,000            
Repurchased and cancelled                 (206,000,000)   $ (1,000,000)            
Preferred Unitholders Capital | Series 14 Preferred Units                                  
Schedule of Partnership Units [Line Items]                                  
Issued for cash (in shares) | shares     8,000,000                            
Shares issued, price per share (usd per share) | $ / shares     $ 25                            
Partnership units issued, net of costs and repurchases     $ 200,000,000                            
Quarterly fixed distribution rate     5.00%                            
Underwriting related cost     $ 6,000,000                            
Preferred Unitholders Capital | Series 13 Preferred Units                                  
Schedule of Partnership Units [Line Items]                                  
Issued for cash (in shares) | shares       8,000,000                          
Shares issued, price per share (usd per share) | $ / shares       $ 25                          
Partnership units issued, net of costs and repurchases       $ 200,000,000                          
Quarterly fixed distribution rate       5.125%                          
Underwriting related cost       $ 5,000,000                          
Special General Partner                                  
Schedule of Partnership Units [Line Items]                                  
Partnership distributions                 $ 206,000,000 $ 183,000,000 $ 158,000,000            
Special General Partner | Partners' capital                                  
Schedule of Partnership Units [Line Items]                                  
Issued for cash (in shares) | shares                 0 0 0            
Repurchased and cancelled (in shares) | shares                 0 0 0            
Repurchased and cancelled                 $ 0 $ 0 $ 0            
Weighted average number of shares outstanding | shares                 1,600,000 1,600,000 1,600,000            
Unit issuance                 $ 0 $ 0 $ 0            
Non-controlling Interest - Redeemable Partnership Units                                  
Schedule of Partnership Units [Line Items]                                  
Increase in equity             $ 8,000,000                    
Issuance of BIPC exchangeable shares [2],[3]                   $ (183,000,000)              
Unit issuance                 $ 400,000,000 [4]   $ 250,000,000            
Non-controlling Interest - Redeemable Partnership Units | Partners' capital                                  
Schedule of Partnership Units [Line Items]                                  
Issued for cash (in shares) | shares         7,100,000   6,100,000     0 6,100,000            
Partnership units issued, net of costs and repurchases             $ 250,000,000                    
Weighted average number of shares outstanding | shares                 122,800,000 121,900,000 118,600,000            
Unit issuance         $ 400,000,000       $ 400,000,000 [4] $ 0 $ 250,000,000            
Non-controlling Interest - Redeemable Partnership Units | Partners' capital | Holding LP                                  
Schedule of Partnership Units [Line Items]                                  
Number of shares issued (in shares) | shares                 129,000,000                
Limited Partners                                  
Schedule of Partnership Units [Line Items]                                  
Repurchased and cancelled                     28,000,000            
Issuance of BIPC exchangeable shares [2],[3]                   (441,000,000)              
Unit issuance                 $ 545,000,000 [4] $ 9,000,000 [3] $ 559,000,000            
Limited Partners | Partners' capital                                  
Schedule of Partnership Units [Line Items]                                  
Issued for cash (in shares) | shares         9,500,000   13,500,000   9,700,000 200,000 13,800,000            
Shares issued, price per share (usd per share) | $ / shares             $ 42.50           $ 58.65        
Partnership units issued, net of costs and repurchases         $ 556,000,000   $ 575,000,000                    
Share issue related cost         $ 23,000,000   $ 24,000,000                    
Repurchased and cancelled (in shares) | shares                 0 100,000 800,000            
Repurchased and cancelled                 $ 0 $ 100,000 $ 28,000,000            
Share repurchase related cost                 $ 0 $ 1,000,000 $ 1,000,000            
Dividend reinvestment plan, unit issued (in shares) | shares                 200,000 1,000,000 1,000,000            
Dividend reinvestment plan, proceeds                 $ 12,000,000 $ 9,000,000 $ 8,000,000            
Weighted average number of shares outstanding | shares                 296,700,000 294,700,000 285,600,000            
Unit issuance                 $ 545,000,000 [4] $ 9,000,000 [3] $ 559,000,000            
Non-controlling Interest - Exchange LP Units, equity | Partners' capital                                  
Schedule of Partnership Units [Line Items]                                  
BIPC exchangeable LP converted to BIPC exchangeable (in shares) | $ / shares                 $ 400,000 $ 0 $ 0            
Issued for cash (in shares) | shares                 0 100,000 0            
Unit issuance                 $ 259,000,000 $ 0 $ 0            
Exchange LP conversion (in shares) | shares                 100,000 300,000 3,200,000            
Exchange LP unit conversion, value                 $ 2,000,000 $ 3,000,000 $ 53,000,000            
Non-controlling interest— BIPC exchangeable shares | Partners' capital                                  
Schedule of Partnership Units [Line Items]                                  
Issued for cash (in shares) | shares                 2,100,000 0 0            
Units converted to Class A shares of BIPC (in shares) | shares                 100,000 1,400,000 0            
Units converted to exchangeable shares, value                 $ (1,000,000) $ (19,000,000) $ 0            
Unit issuance                 $ 1,770,000,000 $ 0 $ 0            
Incentive Distribution, $0.1827 Threshold | Special General Partner | Holding LP | Holding LP’s units (other than Holding LP Class A Preferred Units)                                  
Schedule of Partnership Units [Line Items]                                  
Distributions threshold, per quarter, per share | $ / shares                 $ 0.1827                
Distribution rights entitle as percent, threshold                 15.00%                
Incentive Distribution, $0.198 Threshold | Special General Partner | Holding LP | Holding LP’s units (other than Holding LP Class A Preferred Units)                                  
Schedule of Partnership Units [Line Items]                                  
Distributions threshold, per quarter, per share | $ / shares                 $ 0.198                
Distribution rights entitle as percent, threshold                 25.00%                
Incentive Distribution, $0.203 Threshold | Special General Partner | Holding LP | Holding LP’s units (other than Holding LP Class A Preferred Units)                                  
Schedule of Partnership Units [Line Items]                                  
Distributions threshold, per quarter, per share | $ / shares                   $ 0.203              
Incentive Distribution, $0.22 Threshold | Special General Partner | Holding LP | Holding LP’s units (other than Holding LP Class A Preferred Units)                                  
Schedule of Partnership Units [Line Items]                                  
Distributions threshold, per quarter, per share | $ / shares                   $ 0.22              
[1] Basic and diluted income per limited partner unit for the years ended December 31, 2020, and 2019 have been restated to reflect the impact of the special distribution on March 31, 2020. Refer to Note 1, Organization and Description of the Business, for further details.
[2] Refer to Note 1, Organization and Description of the Business.
[3] Refer to Note 27, Partnership Capital.
[4] Refer to Note 27, Partnership Capital.