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ACQUISITION OF BUSINESSES - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2018
Nov. 05, 2018
Oct. 16, 2018
Oct. 01, 2018
Sep. 07, 2018
Jun. 01, 2018
Apr. 04, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about business combination [line items]                    
Revenues               $ 4,652,000,000 $ 3,535,000,000 $ 2,115,000,000
Net income (loss)               806,000,000 574,000,000 528,000,000 [1]
Unit issuance               588,000,000 1,212,000,000 $ 941,000,000
Increase through business combinations, deferred tax liability               694,000,000 930,000,000  
Goodwill $ 3,859,000,000             3,859,000,000 1,301,000,000  
U.S. Data Center Operation [Member]                    
Disclosure of detailed information about business combination [line items]                    
Proportion of ownership interest in subsidiary 29.00%                  
Consideration transferred $ 315,000,000             315,000,000    
Equity funded consideration 164,000,000             164,000,000    
Asset level debt raised 151,000,000             151,000,000    
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination               10,000,000    
Revenues               0    
Net income (loss)               0    
Cash 315,000,000             315,000,000    
Goodwill expected to be deductible for tax purposes 463,000,000             463,000,000    
Goodwill 463,000,000             463,000,000    
U.S. Data Center Operation [Member] | Consortium                    
Disclosure of detailed information about business combination [line items]                    
Consideration transferred 1,103,000,000             1,103,000,000    
Equity funded consideration 577,000,000             577,000,000    
Equity funded consideration from non-controlling interests 413,000,000             413,000,000    
Asset level debt raised $ 526,000,000             526,000,000    
Rayalseema Expressway Limited [Domain]                    
Disclosure of detailed information about business combination [line items]                    
Proportion of ownership interest in subsidiary   26.00%                
Consideration transferred   $ 5,000,000                
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination               1,000,000    
Revenues               2,000,000    
Net income (loss)               0    
Cash   3,000,000                
Contingent consideration, acquisition-date fair value   2,000,000                
Rayalseema Expressway Limited [Domain] | Consortium                    
Disclosure of detailed information about business combination [line items]                    
Consideration transferred   16,000,000                
Cash   10,000,000                
Contingent consideration, acquisition-date fair value   $ 6,000,000                
North American Residential Energy Infrastructure Operation [Member]                    
Disclosure of detailed information about business combination [line items]                    
Proportion of ownership interest in subsidiary     30.00%              
Consideration transferred     $ 723,000,000              
Equity funded consideration     427,000,000              
Asset level debt raised     64,000,000              
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination               4,000,000    
Revenues               192,000,000    
Net income (loss)               5,000,000    
Cash     491,000,000              
Goodwill expected to be deductible for tax purposes     0              
Goodwill     1,260,000,000              
North American Residential Energy Infrastructure Operation [Member] | Consortium                    
Disclosure of detailed information about business combination [line items]                    
Consideration transferred     2,400,000,000              
Equity funded consideration     2,000,000,000              
Asset level debt raised     $ 216,000,000              
Western Canadian Natural Gas Gathering and Processing Operation [Member]                    
Disclosure of detailed information about business combination [line items]                    
Proportion of ownership interest in subsidiary       29.00%            
Consideration transferred       $ 559,000,000            
Equity funded consideration       281,000,000            
Asset level debt raised       278,000,000            
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination               3,000,000    
Revenues               61,000,000    
Net income (loss)               4,000,000    
Cash       559,000,000            
Goodwill expected to be deductible for tax purposes       0            
Goodwill       524,000,000            
Western Canadian Natural Gas Gathering and Processing Operation [Member] | Consortium                    
Disclosure of detailed information about business combination [line items]                    
Consideration transferred       2,000,000,000            
Equity funded consideration       982,000,000            
Asset level debt raised       $ 974,000,000            
Simhapuri Expressway Limited [Domain]                    
Disclosure of detailed information about business combination [line items]                    
Proportion of ownership interest in subsidiary         29.00%          
Consideration transferred         $ 53,000,000          
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination               1,000,000    
Revenues               15,000,000    
Net income (loss)               (8,000,000)    
Cash         53,000,000          
Goodwill expected to be deductible for tax purposes         0          
Increase through business combinations, deferred tax liability         37,000,000          
Goodwill         37,000,000          
Goodwill not deductible tax purposes         0          
Simhapuri Expressway Limited [Domain] | Consortium                    
Disclosure of detailed information about business combination [line items]                    
Consideration transferred         $ 182,000,000          
Colombian Gas Distribution Operation [Member]                    
Disclosure of detailed information about business combination [line items]                    
Proportion of ownership interest in subsidiary           16.00%        
Consideration transferred           $ 150,000,000        
Equity funded consideration           88,000,000        
Asset level debt raised           62,000,000        
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination               2,000,000    
Revenues               516,000,000    
Net income (loss)               41,000,000    
Cash           118,000,000        
Goodwill expected to be deductible for tax purposes           0        
Goodwill           $ 621,000,000        
Pre-existing equity interest, percentage           3.00%        
Business combinations, pre-existing interest, equity           $ 32,000,000        
Gain (loss) recognised as result of remeasuring to fair value equity interest in acquiree held by acquirer before business combination           0        
Colombian Gas Distribution Operation [Member] | Consortium                    
Disclosure of detailed information about business combination [line items]                    
Consideration transferred           522,000,000        
Equity funded consideration           309,000,000        
Asset level debt raised           $ 213,000,000        
Brazilian regulated gas transmission operation                    
Disclosure of detailed information about business combination [line items]                    
Proportion of ownership interest in subsidiary             28.00%      
Consideration transferred             $ 1,568,000,000      
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination                 $ 8,000,000  
Cash             1,306,000,000      
Goodwill expected to be deductible for tax purposes             0      
Increase through business combinations, deferred tax liability             893,000,000      
Goodwill             804,000,000      
Deferred consideration, acquisition-date fair value             $ 262,000,000      
Deferred consideration, annual interest accrual             3.35%      
Period of payable from close of transaction             5 years      
Goodwill not deductible tax purposes             $ 0      
Brazilian regulated gas transmission operation | Consortium                    
Disclosure of detailed information about business combination [line items]                    
Consideration transferred             5,100,000,000      
Cash             4,200,000,000      
Deferred consideration, acquisition-date fair value             $ 900,000,000      
Brazilian Regulated Gas Transmission Operation and other insignificant transactions                    
Disclosure of detailed information about business combination [line items]                    
Pro forma revenue               6,328,000,000    
Pro forma net income               819,000,000    
Non-controlling Interest - Exchange LP Units, equity [Member]                    
Disclosure of detailed information about business combination [line items]                    
Unit issuance               $ 232,000,000    
Non-controlling Interest - Exchange LP Units, equity [Member] | North American Residential Energy Infrastructure Operation [Member]                    
Disclosure of detailed information about business combination [line items]                    
Exchange LP unit conversion, shares     0.5509              
Unit issuance     $ 232,000,000              
Issued for cash     5,700,000              
[1] Certain net income allocations have been reclassified to provide comparability with the current year consolidated statements of partnership capital.