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SIGNIFICANT ACCOUNTING POLICIES SIGNIFICANT ACCOUNTING POLICIES (Details) | Jun. 30, 2021 | Mar. 31, 2020 shares
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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 |

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