Commitments and Contingent Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Summary of Asbestos Claims Activity

A summary of recent approximate asbestos claims activity follows. Because claims are often filed and disposed of by dismissal or settlement in large numbers, the amount and timing of settlements and the number of open claims during a particular period can fluctuate significantly.

	Three Months Ended			Year Ended
(Dollars in millions)	March 31, 2018			December 31, 2017
Pending claims, beginning of period	54,300			64,400
New claims filed	400			1,900
Claims settled/dismissed	(4,700		)	(12,000		)
Pending claims, end of period	50,000			54,300
Payments (1)	$	3		$	16

(1) Represents cash payments made during the period by us and our insurers on asbestos litigation defense and claim resolution.