Commitments and Contingent Liabilities - Asbestos Claims Activity (Details) - Asbestos Related Product Liability $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) claim	Dec. 31, 2019 USD ($) claim	Dec. 31, 2018 USD ($) claim
Number of claims filed
Pending claims, beginning of year	39,600	43,100	54,300
New claims filed during the year	1,100	1,500	1,300
Claims settled/dismissed	(2,000)	(5,000)	(12,500)
Pending claims, end of year	38,700	39,600	43,100
Payments | $	$ 13	$ 22	$ 18