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Commitments and Contingent Liabilities (Tables) | 3 Months Ended
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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.

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