Condensed Consolidated Schedule of Investments (Unaudited) - USD ($) $ in Thousands		Jun. 30, 2026	Dec. 31, 2025
Schedule of Investments [Line Items]
Cost		$ 886,668	$ 688,037
Fair Value		$ 1,046,573	$ 774,863
Fair Value as a Percentage of Net Assets		104.70%	105.30%
Other Affiliated Investments
Schedule of Investments [Line Items]
Cost	[1]	$ 2,500	$ 2,500
Fair Value	[1]	$ 3,693	$ 3,958
Fair Value as a Percentage of Net Assets	[1]	0.40%	0.50%
Affiliated Investee Funds
Schedule of Investments [Line Items]
Cost		$ 884,168	$ 685,537
Fair Value		$ 1,042,880	$ 770,905
Fair Value as a Percentage of Net Assets		104.30%	104.80%
Investment, Identifier [Axis]: Stonepeak-Plus Infrastructure Fund Aggregator I LP | LP Interest | Affiliated Investments
Schedule of Investments [Line Items]
Cost	[2],[3]	$ 1,171
Fair Value	[2],[3]	$ 1,295
Fair Value as a Percentage of Net Assets	[2],[3]	0.10%
Investment, Identifier [Axis]: Stonepeak-Plus Infrastructure Fund Aggregator I LP2 | LP Interest | Affiliated Investments
Schedule of Investments [Line Items]
Cost	[2],[3]		$ 848
Fair Value	[2],[3]		$ 934
Fair Value as a Percentage of Net Assets	[2],[3]		0.10%
Investment, Identifier [Axis]: Stonepeak-Plus Infrastructure Fund Master Aggregator LP | LP Interest | Affiliated Investments
Schedule of Investments [Line Items]
Cost		$ 882,997	$ 684,689
Fair Value		$ 1,041,585	$ 769,971
Fair Value as a Percentage of Net Assets		104.20%	104.70%

[1] EMEA is defined as Europe, Middle East and Africa.

[2] Holdings LP, and Stonepeak GP Investors Holdings (CYM) LP.

[3] The Master Aggregator controls and consolidates this entity. Included in this interest is an indirect investment in Stonepeak Partners Holdings LP, Stonepeak GP Investors