v3.26.1
Financial Highlights - Summary of Financial Highlights (Details) - $ / shares
 3 Months Ended
Jun. 30, 2026
Mar. 31, 2026
MIF Cayman L.P [Member]    
Per Unit Data    
Total return based on Net Asset Value [1] 8.09%  
Ratios to weighted average net assets (non annualized) (d)    
Total expenses [2] (0.02%)  
Net investment income [2] 1.33%  
Class I Units | Macquarie Infrastructure Fund, L.P [Member]    
Per Unit Data    
Net Asset Value, beginning of period $ 20.91  
Premium/(Discount) on issuance of Units 6.37  
Net investment income (loss) (0.49)  
Net realized and unrealized gain (loss) on investments, derivatives and translation of assets and liabilities in foreign currencies 1.24  
Net increase (decrease) in net assets 0.75  
Net Asset Value, end of period $ 28.03  
Units outstanding, end of period 1,917 110
Total return based on Net Asset Value [3] 34.05%  
Ratios to weighted average net assets (non annualized) (d)    
Accrued performance allocation [4] (0.53%)  
Expenses without waivers [4],[5] (2.20%)  
Management fees waivers [4] 0.22%  
Total expenses [4] (1.98%)  
Net investment income [4] 1.83%  
Class E Units | Macquarie Infrastructure Fund, L.P [Member]    
Per Unit Data    
Net Asset Value, beginning of period $ 16.94  
Premium/(Discount) on issuance of Units 10.23  
Net investment income (loss) (0.42)  
Net realized and unrealized gain (loss) on investments, derivatives and translation of assets and liabilities in foreign currencies 1.32  
Net increase (decrease) in net assets 0.9  
Net Asset Value, end of period $ 28.07  
Units outstanding, end of period 3,554,752 420,000
Total return based on Net Asset Value [3] 65.70%  
Ratios to weighted average net assets (non annualized) (d)    
Accrued performance allocation [4] 0.00%  
Expenses without waivers [4],[5] (1.72%)  
Management fees waivers [4] 0.00%  
Total expenses [4] (1.72%)  
Net investment income [4] 1.57%  
[1] Total return is measured based on the beginning Net Asset Value adjusted for cash flows related to capital contributions or withdrawals during the period. Returns are geometrically linked based on the timing cash flows during the period.
[2] Ratios are not annualized.
[3] Total return is calculated as the change in Net Asset Value per Unit during the period, plus distributions per Unit (assuming dividends and distributions are reinvested in accordance with the distribution reinvestment plan) divided by the initial Net Asset Value per Unit. The total return includes the Premium on issuance of Units. This premium represents the difference in NAV as a result of Transactional NAV (discussed in Note 5) being higher than the NAV under U.S. GAAP. The transactional NAV per Unit, is the price at which transactions in the Units are made. The Premium on issuance of Units accounts for 89.47% and 91.91% of the total return for Class I and E Units, respectively.
[4] Ratios are not annualized.
[5] Expense ratio includes organizational expenses, professional fees, director fees, administration fees, insurance expense, deferred offering costs amortization, interest expense and other expenses. Class I Units expense ratio includes a Management Fee and Performance Allocation which is a class-specific expense.