Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Schedule of Components of Expense/(Income) Related to Net Benefit Expense

	Pension Benefits Cost
	First Quarters
(Dollars in Millions)	2024		2023
Service Cost Included in Labor and Fringe	$	6	$	6
Interest Cost	26		28
Expected Return on Plan Assets	(42)		(41)
Amortization of Net Loss	5		7
Total Included in Other Income - Net	(11)		(6)
Net Periodic Benefit Credit	$	(5)	$	—