Benefit Plans - Defined Benefit Plans (Details) - Pension plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Annual credit earned by participants due to transition from old formula to new formula, percentage of annual pay	4.00%
Costs allocated to the Company for employees' participation in the Retirement Plan	$ 3	$ 1	$ 4
Operating expenses
Defined Benefit Plan Disclosure [Line Items]
Costs allocated to the Company for employees' participation in the Retirement Plan	$ 14	$ 12	$ 12