v3.26.1
Fair Value Measurements - Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments in unconsolidated subsidiaries, fair value $ 406 $ 402
Unamortized debt issuance costs 5,871 5,181
2.500% senior notes due 2031 | Carrying Value | Mortgages    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Unamortized debt issuance costs 405 197
Fair Value Measured at Net Asset Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value using NAV 23 23
Non-Marketable Equity Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Capital investments $ 130 $ 130