XML 47 R37.htm IDEA: XBRL DOCUMENT v3.22.2
Borrowings and Other Financing Instruments Revolving Credit Facilities (Details) - Revolving Credit Facility [Member] - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Line of Credit Facility [Line Items]    
Credit Facility [1] $ 3,100  
Outstanding [2] 175  
Available 2,925  
Direct advances on the credit facility outstanding 0 $ 0
PSCo    
Line of Credit Facility [Line Items]    
Credit Facility [1] 700  
Outstanding [2] 26  
Available 674  
NSP-Minnesota    
Line of Credit Facility [Line Items]    
Credit Facility [1] 500  
Outstanding [2] 11  
Available 489  
SPS    
Line of Credit Facility [Line Items]    
Credit Facility [1] 500  
Outstanding [2] 2  
Available 498  
NSP-Wisconsin    
Line of Credit Facility [Line Items]    
Credit Facility [1] 150  
Outstanding [2] 0  
Available 150  
Xcel Energy Inc.    
Line of Credit Facility [Line Items]    
Credit Facility [1] 1,250  
Outstanding [2] 136  
Available $ 1,114  
[1] Expires in June 2024.
[2] Includes outstanding commercial paper and letters of credit.