Commitments and Contingent Liabilities - Summary of Asbestos Claims Activity (Details) - Asbestos Related Product Liability $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2018 USD ($) claim	Dec. 31, 2017 USD ($) claim
Number of claims filed
Pending claims, beginning of period	54,300	64,400
New claims filed	900	1,900
Claims settled/dismissed	(5,700)	(12,000)
Pending claims, end of period	49,500	54,300
Payments \| $	$ 7	$ 16

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of cash outflow reducing loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

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- Definition

The number of claims settled and dismissed during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

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