v3.25.2
COVER PAGE - shares
 6 Months Ended
Jun. 30, 2025
Aug. 08, 2025
Class of Stock [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Securities Act File Number 001-04321  
Entity Registrant Name NUVEEN CHURCHILL PRIVATE CAPITAL INCOME FUND  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 88-6187397  
Entity Address, Address Line One 375 Park Avenue, 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 478-9200  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001911066  
Amendment Flag false  
Common Class I    
Class of Stock [Line Items]    
Entity Common Stock, Shares Outstanding   43,743,537
Common Class D    
Class of Stock [Line Items]    
Entity Common Stock, Shares Outstanding   1,040,083
Common Class S    
Class of Stock [Line Items]    
Entity Common Stock, Shares Outstanding   1,446,252