Commitments and Contingent Liabilities Asbestos Information (Details) claim in Thousands, $ in Millions	1 Months Ended
	May 14, 2002 shares	Sep. 30, 2019 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2008 USD ($)	Dec. 31, 2000 claim
Prepayment of future pre-tax cash payments to the trust			$ 764
Loss Contingency, Pending Claims, Number | claim					114
Other Reserves		$ 180
Asbestos Issue [Member]
Loss Contingency, Pending Claims, Number		675
Other Reserves		$ 162
Individually Identified Premises Claims [Member]
Loss Contingency, Pending Claims, Number | claim					1
Pittsburgh Corning Corporation [Member] | Asbestos Issue [Member]
Settlement Payables Shares | shares	2,777,778
Insurance Settlements Receivable				$ 1,700
Settlement Prepayment Discount Rate	5.50%