Casualty, Environmental and Other Reserves (Tables)

6 Months Ended

Jun. 30, 2018

Casualty, Environmental and Other Reserves [Abstract]

Schedule of Casualty, Environmental and Other Reserves

Personal injury and environmental reserves are considered critical accounting estimates due to the need for significant management judgment. Casualty, environmental and other reserves are provided for in the consolidated balance sheets as shown in the table below.

	June 30, 2018						December 31, 2017
(Dollars in millions)	Current		Long-term		Total		Current		Long-term		Total
Casualty:
Personal Injury	$	42	$	105	$	147	$	43	$	125	$	168
Occupational	7		47		54		6		54		60
Total Casualty	49		152		201		49		179		228
Environmental	37		54		91		31		59		90
Other	28		26		54		28		28		56
Total	$	114	$	232	$	346	$	108	$	266	$	374