v3.26.1
Cash and Cash Equivalents and Restricted Cash and Cash Equivalents - SPPC (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Condensed Cash Flow Statements, Captions [Line Items]        
Cash and cash equivalents $ 4,072 $ 1,695    
Restricted cash and cash equivalents included in other current assets 151 168    
Total cash and cash equivalents and restricted cash and cash equivalents 4,238 1,878 $ 2,420 $ 1,586
SPPC        
Condensed Cash Flow Statements, Captions [Line Items]        
Cash and cash equivalents 124 5    
Restricted cash and cash equivalents included in other current assets 3 5    
Total cash and cash equivalents and restricted cash and cash equivalents $ 127 $ 10 $ 36 $ 24