Fair Value Measurements - Fair Value of Other Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Fair value disclosures
Total debt	$ 3,922	$ 3,535
Current maturities	(250)	0
Long-term debt, excluding current maturities	3,672	3,535
Carrying Amount
Fair value disclosures
Total debt	3,922	3,535
Current maturities	(250)	0
Long-term debt, excluding current maturities	3,672	3,535
Estimated Fair Value
Fair value disclosures
Total debt	3,869	3,395
Current maturities	(248)	0
Long-term debt, excluding current maturities	$ 3,621	$ 3,395