v3.26.1
Fair-Value Measurements (Narrative) (Details) - USD ($)
$ in Billions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying value of senior unsecured notes $ 3.2 $ 3.1
Fair value of senior unsecured notes $ 3.2 $ 3.2