Casualty, Environmental and Other Reserves (Tables)

12 Months Ended

Dec. 31, 2021

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, 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
Assumed in Acquisition of Quality Carriers	—		29		33		62
Charged to Expense	55		26		49		130
Payments	(71)		(23)		(44)		(138)
December 31, 2021	$	180	$	108	$	80	$	368

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 2021						December 2020
(Dollars in Millions)	Current		Long-term		Total		Current		Long-term		Total
Casualty:
Personal Injury	$	37	$	81	$	118	$	38	$	93	$	131
Occupational	7		55		62		11		54		65
Total Casualty	$	44	$	136	$	180	$	49	$	147	$	196
Environmental	37		71		108		23		53		76
Other	37		43		80		18		24		42
Total	$	118	$	250	$	368	$	90	$	224	$	314