RELATED PARTY TRANSACTIONS - Schedule of Expense Payments and Reimbursement Payments (Details) - Expense Support Agreement - Affiliated Entity - USD ($) $ in Thousands	3 Months Ended															45 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2025
Related Party Transaction [Line Items]
Expense Payments by Adviser	$ 384	$ 110	$ 0	$ 333	$ 75	$ 217	$ 31	$ 115	$ 327	$ 113	$ 198	$ 176	$ 379	$ 677	$ 983	$ 4,118
Reimbursement Payments to Adviser	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Expired Expense Support	0	0	0	0	0	0	0	0	0	0	0	0	(379)	(677)	(983)	(2,039)
Unreimbursed Expense Payments	$ 384	$ 110	$ 0	$ 333	$ 75	$ 217	$ 31	$ 115	$ 327	$ 113	$ 198	$ 176	$ 0	$ 0	$ 0	$ 2,079
Effective rate of distribution per share	9.82%	9.78%	9.74%	9.68%	9.70%	9.72%	12.19%	12.13%	12.19%	11.69%	10.22%	9.07%	7.23%	6.62%	0.00%
Operating expense ratio	0.15%	0.15%	0.17%	0.21%	0.15%	0.15%	0.12%	0.13%	0.27%	0.22%	0.22%	0.14%	0.21%	0.19%	0.08%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Nuveen Churchill Private Capital Income Fund 10-Q