v3.26.1
Schedules of Investments (Parenthetical) - USD ($)
Jun. 30, 2026
Mar. 31, 2026
Macquarie Infrastructure Fund, L.P    
Schedule of Investments [Line Items]    
Cost $ 9,846,980 $ 49,548
Fair Value as a Percentage of Net Assets 6.80% 1.24%
Macquarie Infrastructure Fund, L.P | Total investments in affiliated fund and investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 104.07% 156.31%
Macquarie Infrastructure Fund, L.P | Investment, Affiliated Issuer [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 94.21% 155.61%
Macquarie Infrastructure Fund, L.P | Government Bonds [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 9.86% 0.70%
Macquarie Infrastructure Fund, L.P | Americas [Member] | Total investments in affiliated fund and investments [Member]    
Schedule of Investments [Line Items]    
Cost $ 9,846,980 $ 49,548
Macquarie Infrastructure Fund, L.P | Various [Member] | Total investments in affiliated fund and investments [Member]    
Schedule of Investments [Line Items]    
Cost 89,051,454 9,805,183
MIF Cayman, L.P.    
Schedule of Investments [Line Items]    
Cost $ 1,002,713,098 $ 763,562,434
Fair Value as a Percentage of Net Assets 5.00% 5.00%
MIF Cayman, L.P. | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 83.04% [1] 91.53% [2]
MIF Cayman, L.P. | Total Investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 84.11% 95.39%
MIF Cayman, L.P. | Total investments in affiliated fund and investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 99.32% 99.57%
MIF Cayman, L.P. | Investment, Affiliated Issuer [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 15.21% 4.18%
MIF Cayman, L.P. | Debt Investments [Member]    
Schedule of Investments [Line Items]    
Cost $ 15,523,354  
Fair Value as a Percentage of Net Assets 1.07% [3] 3.86% [4]
MIF Cayman, L.P. | Americas [Member]    
Schedule of Investments [Line Items]    
Cost   $ 409,773,497
MIF Cayman, L.P. | Americas [Member] | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Cost $ 549,363,725 409,773,497
MIF Cayman, L.P. | Americas [Member] | Total Investments [Member]    
Schedule of Investments [Line Items]    
Cost 549,363,725 409,773,497
MIF Cayman, L.P. | Americas [Member] | Total investments in affiliated fund and investments [Member]    
Schedule of Investments [Line Items]    
Cost 549,363,725  
MIF Cayman, L.P. | EMEA [Member]    
Schedule of Investments [Line Items]    
Cost   260,505,420
MIF Cayman, L.P. | EMEA [Member] | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Cost 356,590,112 221,822,621
MIF Cayman, L.P. | EMEA [Member] | Total Investments [Member]    
Schedule of Investments [Line Items]    
Cost 356,590,112 221,822,621
MIF Cayman, L.P. | EMEA [Member] | Total investments in affiliated fund and investments [Member]    
Schedule of Investments [Line Items]    
Cost 567,164,136  
MIF Cayman, L.P. | EMEA [Member] | Investment, Affiliated Issuer [Member]    
Schedule of Investments [Line Items]    
Cost 210,574,024 38,682,799
MIF Cayman, L.P. | APAC [Member]    
Schedule of Investments [Line Items]    
Cost   81,235,907
MIF Cayman, L.P. | APAC [Member] | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Cost 81,235,907 81,235,907
MIF Cayman, L.P. | APAC [Member] | Total Investments [Member]    
Schedule of Investments [Line Items]    
Cost 81,235,907 81,235,907
MIF Cayman, L.P. | APAC [Member] | Total investments in affiliated fund and investments [Member]    
Schedule of Investments [Line Items]    
Cost 81,235,907  
MIF Cayman, L.P. | Various [Member]    
Schedule of Investments [Line Items]    
Cost   50,730,409
MIF Cayman, L.P. | Various [Member] | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Cost   16,771,183
MIF Cayman, L.P. | Various [Member] | Total Investments [Member]    
Schedule of Investments [Line Items]    
Cost 15,523,354 50,730,409
MIF Cayman, L.P. | Various [Member] | Total investments in affiliated fund and investments [Member]    
Schedule of Investments [Line Items]    
Cost $ 15,523,354  
MIF Cayman, L.P. | Various [Member] | Debt Investments [Member]    
Schedule of Investments [Line Items]    
Cost   $ 33,959,226
MIF Cayman, L.P. | MGREF 2 Cooks Holdings 2 Limited | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 40.83% 40.83%
MIF Cayman, L.P. | MGIF Hobbs Holdings LLC | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 13.29% 13.29%
MIF Cayman, L.P. | D. E. Shaw Renewable | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets   2.55%
MIF Cayman, L.P. | Macquarie Global Infrastructure Fund (USD Feeder) SCSp | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 39.95% 10.76%
MIF Cayman, L.P. | InfraPark CI Blocker, LLC | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 13.28% 13.60%
MIF Cayman, L.P. | MSCIF Sandstone Ventures S.a r.l. | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.47% 2.34%
MIF Cayman, L.P. | MGIF Connex Investments S.a r.l. | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 13.00%  
MIF Cayman, L.P. | MIF Earth Holdings S.a r.l. | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets   100.00%
MIF Cayman, L.P. | Voyage MAIF3 Consortium Trust | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.40% 3.40%
MIF Cayman, L.P. | Aligned Co-Invest Aggregator, L.P. | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 5.35% 3.74%
MIF Cayman, L.P. | MIP HPC Feeder, L.P. | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 47.30%  
MIF Cayman, L.P. | MEIF 7 Homecoming Regional Ventures S.a r.l. | Total Equity investments [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 2.84% 2.84%
[1] Equity investments generally include different forms of interests and rights and obligations that represent ownership in an entity or the right to acquire or dispose of ownership in an entity, including but not limited to (1) common equity, (2) preferred equity, (3) limited partner interests, (4) warrants and (5) other equity-linked securities.
[2] Equity investments generally include different forms of interests and rights and obligations that represent ownership in an entity or the right to acquire or dispose of ownership in an entity, including but not limited to (1) common equity, (2) preferred equity, (3) limited partner interests, (4) warrants and (5) other equity-linked securities.
[3] Debt investments includes different forms of interests that represent a creditor relationship with an investee, including but not limited to (1) bank loans, (2) interests in collateralized loan obligations and (3) direct lending debt investments.
[4] Debt investments include different forms of interests that represent a creditor relationship with an investee, including but not limited to (1) bank loans, (2) interests in collateralized loan obligations and (3) direct lending debt investments.