Casualty, Environmental and Other Reserves (Tables)

12 Months Ended

Dec. 31, 2020

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, 2017	$	228	$	90	$	56	$	374
Charged to Expense	21		10		41		72
Payments	(50)		(20)		(52)		(122)
December 31, 2018	199		80		45		324
Charged to Expense	56		17		34		107
Payments	(68)		(23)		(35)		(126)
December 31, 2019	187		74		44		305
Charged to Expense	55		20		32		107
Payments	(46)		(18)		(34)		(98)
December 31, 2020	$	196	$	76	$	42	$	314

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 2020						December 2019
(Dollars in Millions)	Current		Long-term		Total		Current		Long-term		Total
Casualty:
Personal Injury	$	38	$	93	$	131	$	42	$	87	$	129
Occupational	11		54		65		6		52		58
Total Casualty	$	49	$	147	$	196	$	48	$	139	$	187
Environmental	23		53		76		31		43		74
Other	18		24		42		21		23		44
Total	$	90	$	224	$	314	$	100	$	205	$	305