Casualty, Environmental and Other Reserves (Tables)

12 Months Ended

Dec. 31, 2024

Casualty, Environmental and Other Reserves [Abstract]

Schedule of Claims Activity

Activity related to casualty, environmental and other reserves is as follows:

	Casualty		Environmental		Other
(Dollars in Millions)	Reserves		Reserves		Reserves		Total
December 31, 2021	$	180	$	108	$	80	$	368
Assumed in Acquisition of Pan Am	19		36		—		55
Charged to Expense	45		47		51		143
Payments	(50)		(30)		(50)		(130)
December 31, 2022	194		161		81		436
Charged to Expense	69		29		67		165
Payments	(68)		(36)		(57)		(161)
December 31, 2023	195		154		91		440
Charged to Expense	72		28		68		168
Payments	(59)		(31)		(56)		(146)
December 31, 2024	$	208	$	151	$	103	$	462

Schedule of Balance Sheet Presentation 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.

	December 2024						December 2023
(Dollars in Millions)	Current		Long-term		Total		Current		Long-term		Total
Casualty:
Personal Injury	$	51	$	91	$	142	$	45	$	83	$	128
Occupational	7		59		66		7		60		67
Total Casualty	$	58	$	150	$	208	$	52	$	143	$	195
Environmental	37		114		151		41		113		154
Other	54		49		103		51		40		91
Total	$	149	$	313	$	462	$	144	$	296	$	440