Commitments and Contingent Liabilities - Summary of Asbestos Claims Activity (Details) - Asbestos Related Product Liability $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2017 USD ($) claim	Dec. 31, 2016 USD ($) claim
Number of claims filed
Pending claims, beginning of period	64,400	67,400
New claims filed	1,000	1,900
Claims settled/dismissed	(4,000)	(4,900)
Pending claims, end of period	61,400	64,400
Payments | $	$ 4	$ 20