v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2019
Apr. 30, 2019
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol UHS  
Entity Registrant Name UNIVERSAL HEALTH SERVICES INC  
Entity Central Index Key 0000352915  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   6,577,100
Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   82,882,673
Class C    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   661,688
Class D    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   18,573