v3.26.1
Statement of Changes in Net Assets - USD ($)
 3 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2026
MIF Cayman, L.P.      
Net assets, Beginning balance [1]     $ 894,766,869
Capital contributions [1]     431,306,171
Distributions [1]     (30,877,179)
Net investment income (loss) [2]     15,961,490
Net realized and unrealized gain (loss) on investments, derivatives and translation of assets and liabilities in foreign currencies [1]     72,350,454
Net assets. Ending balance [1]     1,383,507,805
MIF Cayman, L.P. | General Partner [Member]      
Net assets, Beginning balance [1]     0
Capital contributions [1]     0
Distributions [1]     0
Net investment income (loss) [1]     0
Net realized and unrealized gain (loss) on investments, derivatives and translation of assets and liabilities in foreign currencies [1]     0
Net assets. Ending balance [1]     0
MIF Cayman, L.P. | Limited Partner [Member]      
Net assets, Beginning balance [1]     894,766,869
Capital contributions [1]     431,306,171
Distributions [1]     30,877,179
Net investment income (loss) [1]     15,961,490
Net realized and unrealized gain (loss) on investments, derivatives and translation of assets and liabilities in foreign currencies [1]     72,350,454
Net assets. Ending balance [1]     1,383,507,805
Macquarie Infrastructure Fund, L.P      
Net assets, Beginning balance   $ 0 7,116,444
Capital contributions   0 89,550,000
Net investment income (loss) $ 0   (1,510,779)
Net investment income (loss)   0 (1,510,779)
Net realized and unrealized gain (loss) on investments, derivatives and translation of assets and liabilities in foreign currencies   0 4,680,492
Net assets. Ending balance 0 0 99,836,157
Macquarie Infrastructure Fund, L.P | Class E [Member]      
Net assets, Beginning balance   0 7,114,144
Capital contributions   0 89,500,000
Net investment income (loss)   0 (1,509,837)
Net realized and unrealized gain (loss) on investments, derivatives and translation of assets and liabilities in foreign currencies   0 4,678,117
Net assets. Ending balance 0 0 99,782,424
Macquarie Infrastructure Fund, L.P | Class I [Member]      
Net assets, Beginning balance   0 2,300
Capital contributions   0 50,000
Net investment income (loss)   0 (942)
Net realized and unrealized gain (loss) on investments, derivatives and translation of assets and liabilities in foreign currencies   0 2,375
Net assets. Ending balance $ 0 $ 0 $ 53,733
[1] MIF Cayman, L.P. was formed on July 29, 2025 and commenced principal operations on October 31, 2025, and accordingly, there were no operations during the three months ended June 30, 2025.
[2] MIF Cayman, L.P. was formed on July 29, 2025 and commenced principal operations on October 31, 2025, and accordingly, there were no operations during the three months ended June 30, 2025.