v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Jul. 31, 2025
Cover [Abstract]    
Entity Registrant Name PUBLIC SERVICE CO OF COLORADO  
Entity Central Index Key 0000081018  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-03280  
Entity Incorporation, State or Country Code CO  
Entity Tax Identification Number 84-0296600  
Entity Address, Address Line One 3500 Blake Street,  
Entity Address, City or Town Denver,  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80205  
City Area Code (303)  
Local Phone Number 571-7511  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   100