Commitments and Contingent Liabilities - Schedule of Current and Long-term Components of Environmental Remediation Liabilites and Balance Sheet Locations (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Environmental Remediation [Line Items]
Current environmental remediation	$ 97	$ 74
Long-term environmental remediation	301	332
Total environmental remediation	398	406
Other Accrued Liabilities [Member]
Environmental Remediation [Line Items]
Current environmental remediation	97	74
Other Liabilities [Member]
Environmental Remediation [Line Items]
Long-term environmental remediation	$ 301	$ 332