Casualty, Environmental and Other Reserves (Tables)

3 Months Ended

Mar. 31, 2024

Casualty, Environmental and Other Reserves [Abstract]

Schedule of Casualty, Environmental and Other Reserves

Casualty, environmental and other reserves are provided for in the consolidated balance sheets as shown in the table below.

	March 31, 2024						December 31, 2023
(Dollars in Millions)	Current		Long-term		Total		Current		Long-term		Total
Casualty:
Personal Injury	$	45	$	87	$	132	$	45	$	83	$	128
Occupational	7		62		69		7		60		67
Total Casualty	52		149		201		52		143		195
Environmental	41		113		154		41		113		154
Other	47		46		93		51		40		91
Total	$	140	$	308	$	448	$	144	$	296	$	440