Pension and Other Postretirement Benefits - Summary of Information in Curtailment or Settlement of Benefits Requiring Remeasurement, Update to Discount Rates Used to Determine Benefit Obligations of Affected Plans (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2025 USD ($) Employees	Sep. 30, 2025 USD ($) Employees	Sep. 30, 2024 USD ($)	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) to other noncurrent assets		$ 91	$ 4
2025 Plan Actions [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of affected plan participants | Employees	25	25
Weighted average discount rate	4.49%	4.49%		4.87%
Plan remeasurement date		Sep. 30, 2025
Increase (decrease) to other noncurrent assets	$ (2)	$ (2)
Settlement gain	$ 1	$ (1)