Environmental Environmental (US Superfund Sites Narrative) (Details) $ in Billions		12 Months Ended
Mar. 03, 2016 USD ($)	Dec. 31, 2020
Site Contingency [Line Items]
Document Period End Date		Dec. 31, 2020
Passaic River, New Jersey [Member]
Site Contingency [Line Items]
Number of Parties included in USEPA order		70
EPA Estimated Cost	$ 1.4
Environmental Liability Percentage		1.00%

The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is YYYY-MM-DD.

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