| Cover | May 31, 2024 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | May 31, 2024 |
| Entity Registrant Name | Nuveen Churchill Private Capital Income Fund |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-56412 |
| Entity Tax Identification Number | 88-6187397 |
| Entity Address, Address Line One | 375 Park Avenue |
| Entity Address, Address Line Two | 9th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10152 |
| City Area Code | 212 |
| Local Phone Number | 207-2003 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001911066 |
| Amendment Flag | false |
