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BORROWINGS - Non-Recourse Borrowings (Details) - USD ($) $ in Millions | 6 Months Ended |
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Jun. 30, 2021 | Dec. 31, 2020
Disclosure of detailed information about borrowings [line items] |  |
Current Non-recourse Borrowings And Current Portion of Non-current Non-recourse Borrowings | $ 1,332 | $ 1,551
Non-current Portion Of Non-current Non-recourse Borrowings | 18,667 | $ 18,469
Borrowings associated with recent acquisitions and growth initiatives | $ 1,100 |

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- Definition Borrowings associated with recent acquisitions and growth initiatives + References No definition available. + Details
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Period Type: | duration

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- Definition Current Non-recourse Borrowings And Current Portion Of Non-current Non-recourse Borrowings + References No definition available. + Details
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Namespace Prefix: | bip_
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- Definition Non-current Portion Of Non-current Non-recourse Borrowings + References No definition available. + Details
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Namespace Prefix: | bip_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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