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SIGNIFICANT ACCOUNTING POLICIES SIGNIFICANT ACCOUNTING POLICIES (Details)
Jun. 30, 2021
Mar. 31, 2020
shares
Prospective Adoption of New Accounting Pronouncements [Line Items]    
Exchangeable shares issued as a result of the Holding LP Distribution, Brookfield   13,700,000
Exchangeable shares issued as a result of the Holding LP Distribution, Partnership   32,600,000
Percentage of issued and outstanding exchangeable shares held by holders of units   70.40%
Percentage of issued and outstanding exchangeable shares held by Brookfield   29.60%
Exchangeable shares issued as a result of the Holding LP Distribution, Total   46,300,000
Non-controlling Interest - Class A Shares, equity [Member]    
Prospective Adoption of New Accounting Pronouncements [Line Items]    
Brookfield Infrastructure Corporation, Special Distribution, Limited Partner Units, Conversion Ratio   1
Limited Partners 1 [Member]    
Prospective Adoption of New Accounting Pronouncements [Line Items]    
Brookfield Infrastructure Corporation, Special Distribution, Limited Partner Units, Conversion Ratio   9
Brookfield Infrastructure Corporation, Conversion Ratio to Units [Abstract] 1