Condensed Consolidated Statements of Changes in Net Assets (Unaudited) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital, beginning balance	$ 298,444,050	$ 1,000
Proceeds from Contributions	92,228,387	381,811,118
Net investment income/(loss)	(5,168,642)	(17,492,680)
Net change in unrealized gain/(loss) on investments	23,917,080	53,723,050
Partners' capital, ending balance	405,503,881	405,503,881
Stonepeak-Plus Infrastructure Fund Master Aggregator LP
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital, beginning balance	478,964,031	0
Proceeds from Contributions	153,590,784	586,176,176
Distributions to Partners	(267,320)	(267,320)
Net investment income/(loss)	(368,056)	(186,238)
Net realized gain/(loss) on investments	71,632	81,210
Net change in unrealized gain/(loss) on investments	38,944,837	85,132,080
Provision for (benefit from) income taxes on net unrealized gain on investments	(1,054,897)	(1,054,897)
Partners' capital, ending balance	669,881,011	669,881,011
Non-Controlling Interests in Consolidated Entities
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital, beginning balance	106,967	0
Proceeds from Contributions		100,000
Net investment income/(loss)	(1,075)	(1,603)
Net change in unrealized gain/(loss) on investments	31,116	38,611
Partners' capital, ending balance	137,008	137,008
Non-Controlling Interests in Consolidated Entities | Stonepeak-Plus Infrastructure Fund Master Aggregator LP
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital, beginning balance	532,147	0
Proceeds from Contributions	7,094	500,000
Net investment income/(loss)	6,888	10,896
Net realized gain/(loss) on investments	19	23
Net change in unrealized gain/(loss) on investments	8,619	43,848
Partners' capital, ending balance	554,767	554,767
Limited Partners Interest | General Partner’s Interest | Stonepeak-Plus Infrastructure Fund Master Aggregator LP
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital, beginning balance	477,887,629	0
Proceeds from Contributions	153,575,304	585,176,176
Distributions to Partners	(267,320)	(267,320)
Net investment income/(loss)	(374,965)	(197,358)
Net realized gain/(loss) on investments	71,549	81,112
Net change in unrealized gain/(loss) on investments	38,884,519	84,984,106
Provision for (benefit from) income taxes on net unrealized gain on investments	(1,053,343)	(1,053,343)
Partners' capital, ending balance	668,723,373	668,723,373
General Partner’s Interest | General Partner’s Interest
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital, beginning balance	0	1,000
Proceeds from Contributions		(1,000)
Partners' capital, ending balance	0	0
General Partner’s Interest | General Partner’s Interest | Stonepeak-Plus Infrastructure Fund Master Aggregator LP
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital, beginning balance	544,255	0
Proceeds from Contributions	8,386	500,000
Net investment income/(loss)	21	224
Net realized gain/(loss) on investments	64	75
Net change in unrealized gain/(loss) on investments	51,699	104,126
Provision for (benefit from) income taxes on net unrealized gain on investments	(1,554)	(1,554)
Partners' capital, ending balance	$ 602,871	$ 602,871