v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
Apr. 30, 2026
Document [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-39245  
Entity Registrant Name SPHERE ENTERTAINMENT CO.  
Entity Incorporation, State or Country Code NV  
Entity Tax Identification Number 84-3755666  
Entity Address, Address Line One Two Penn Plaza  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10121  
City Area Code 725  
Local Phone Number 258-0001  
Title of 12(b) Security Class A Common Stock  
Trading Symbol SPHR  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0001795250  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Common Class A    
Document [Line Items]    
Entity Common Stock, Shares Outstanding   28,925,449
Common Class B    
Document [Line Items]    
Entity Common Stock, Shares Outstanding   6,866,754