v3.26.1
Fair Value Measurements (Recurring Fair Value Measurements) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Marketable securities held in trusts $ 711 $ 750
Derivative assets 300 436
Derivative liabilities 472 265
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Marketable securities held in trusts 638 676
Derivative assets 0 0
Derivative liabilities 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Marketable securities held in trusts 73 74
Derivative assets 300 436
Derivative liabilities 472 265
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Marketable securities held in trusts 0 0
Derivative assets 0 0
Derivative liabilities $ 0 $ 0