XML 67 R56.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Commitments and Contingencies NSP-Minnesota-Sherco (Details) - USD ($)
$ in Millions
 1 Months Ended
Jan. 31, 2021
May 17, 2024
Sep. 22, 2023
Rate Matters [Abstract]      
Sherco Disallowance $ 22    
Sherco Large Industrial Customer group recommended refund     $ 72
ALJ Recommended Customer Refund   $ 34  
Disallowance Not Considered in ALJ Recommendation   $ 22  
NSP-Minnesota      
Rate Matters [Abstract]      
Customer refund of previously recovered purchased power costs $ 17    
DOC Recommendation Based on Xcel's GE Litigation Loss of Use     $ 56