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FAIR VALUE OF FINANCIAL INSTRUMENTS - Allocation of Financial Instruments - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]
Preferred shares	$ 20	$ 20

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- Definition

[Line Items] for Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table]

+ References

No definition available.

+ Details

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Namespace Prefix:	bip_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Preferred Shares

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No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant