Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Schedule of Changes in AOCI balance by Component

	Pension and Other Post-Employment Benefits		Interest Rate Derivatives		Other		Accumulated Other Comprehensive Income (Loss)
(Dollars in millions)
Balance December 31, 2022, Net of Tax	$	(497)	$	150	$	(41)	$	(388)
Other Comprehensive Income (Loss)
Income Before Reclassifications	—		(3)		—		(3)
Amounts Reclassified to Net Earnings	4		—		2		6
Tax (Expense)/Benefit	(1)		—		—		(1)
Total Other Comprehensive Income	3		(3)		2		2
Balance March 31, 2023, Net of Tax	$	(494)	$	147	$	(39)	$	(386)