Fair Value of Financial Instruments - Schedule of Carrying Values and Fair Values of Other Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Carrying value
Derivative [Line Items]
Available-for-sale securities	$ 18	$ 18
Held-to-maturity investments	3	5
Long-term debt, less long-term debt due within one year	4,050	2,859
Fair value | Level 1
Derivative [Line Items]
Available-for-sale securities	18	18
Fair value | Level 2
Derivative [Line Items]
Held-to-maturity investments	3	5
Long-term debt, less long-term debt due within one year	$ 4,034	$ 2,919