v3.26.1
Fair Value Measurements - MEC - Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, fair value $ 60,393 $ 57,259
Level 2 | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, fair value 55,466 52,665
MEC | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, fair value 9,208 9,207
MEC | Level 2 | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, fair value $ 8,296 $ 8,416