Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

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

	Pension Benefits
(Dollars in millions)	First Quarters
	2018			2017
Service Cost Included in Labor and Fringe	$	9		$	11
Interest Cost	23			23
Expected Return on Plan Assets	(44		)	(42		)
Amortization of Net Loss	10			11
Total Income Included in Other Income - Net	$	(11	)	$	(8	)
Net Periodic Benefit Cost	$	(2	)	$	3
Restructuring Charges - Non Operating (a)	—			50
Total (Income) Expense	$	(2	)	$	53
	Other Post-retirement Benefits
(Dollars in millions)	First Quarters
	2018			2017
Interest Cost	$	2		$	2
Amortization of Net Loss	—			—
Total Expense Included in Other Income - Net	$	2		$	2
Net Periodic Benefit Cost	$	2		$	2
Restructuring Charges - Non Operating  (a)	—			13
Total Expense	$	2		$	15

(a) Charges related to special termination benefits and curtailment costs were the result of the management workforce reductions in first quarter 2017. See Management Workforce Reductions in Note 1. Nature of Operations and Significant Accounting Policies.