Environmental Environmental (US Superfund Sites Narrative) (Details) $ in Millions			12 Months Ended
	Sep. 30, 2021 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2021
Site Contingency [Line Items]
Document Period End Date			Dec. 31, 2021
Passaic River, New Jersey [Member]
Site Contingency [Line Items]
Number of Parties included in USEPA order			70
EPA Estimated Cost	$ 441	$ 1,400
Environmental Liability Percentage			1.00%