Commitments and Contingencies (Details)		1 Months Ended		3 Months Ended
	Jun. 04, 2018 USD ($)	Dec. 31, 2018 USD ($)	Aug. 31, 2005 USD ($)	Mar. 31, 2022 USD ($) case claim defendant	Mar. 22, 2022 USD ($)	Mar. 21, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 23, 2021 USD ($)	Dec. 30, 2020 USD ($)	Nov. 05, 2020 USD ($)	Jan. 27, 2020 party	Nov. 01, 2019 USD ($)	Nov. 01, 2019 BRL (R$)	Mar. 18, 2019 USD ($)	Mar. 18, 2019 BRL (R$)
Commitments and Contingencies
Number Of Potentially Related Parties | party											20
Reserve for loss contingencies				$ 6,900,000
Penalties per day												$ 5,000	R$ 25,000	$ 1,000	R$ 5,000
Penalties												2,000,000	10,000,000
Current Portion of Environmental Liabilities				7,533,000			$ 7,338,000
Environmental liabilities				27,565,000			28,435,000
Total environmental liabilities				35,098,000			35,773,000
Proposed Civil Penalty								$ 390,092
BRAZIL
Commitments and Contingencies
Loss Contingencies, Unpaid Service Taxes									$ 2,200,000
Loss Contingencies, Overall Liability				3,700,000
Brazilian Tax Disputes - Jan 2004 through May 2005 | Sao Paulo State Revenue Authority
Commitments and Contingencies
Damages sought - interest, penalties and fees				18,100,000
Damages sought - principal				1,300,000
Loss contingency, reduced penalty	$ 1,300,000
Amount of damages sought	$ 7,700,000
Brazilian Tax Disputes - Jan 2002 through Dec 2003 | Sao Paulo State Revenue Authority
Commitments and Contingencies
Damages sought - interest, penalties and fees			$ 4,000,000
Damages sought - principal			1,300,000
Loss contingency, reduced penalty		$ 900,000
Amount of damages sought			$ 5,300,000
Loss contingency, reduced penalty, including interest		$ 5,800,000
Brazilian Labor Claims
Commitments and Contingencies
Loss contingency reserves				$ 3,600,000			$ 3,200,000
Other
Commitments and Contingencies
Approximate number of defendants that includes the company named in legal actions | defendant				90
Number of pending claims | claim				17,220
Number of claims dismissed to date by stipulation or summary judgment prior to trial | case				28,380
Other | Active or In Extremis docket
Commitments and Contingencies
Number of pending claims | claim				40
Other | Minimum
Commitments and Contingencies
Amount of damages sought				$ 20,000,000
Other | Maximum
Commitments and Contingencies
Amount of damages sought				$ 25,000,000
Other | New York County as managed by the New York Supreme Court
Commitments and Contingencies
Number of pending claims | case				16,590
Other | New York County as managed by the New York Supreme Court | Pending And Future Litigation, Deferred Or Inactive Docket
Commitments and Contingencies
Number of pending claims | claim				16,550
Other | New York State Supreme Court, Counties Excluding New York County
Commitments and Contingencies
Number of pending claims | case				120
Other | Courts Located In States Other Than New York
Commitments and Contingencies
Number of pending claims | case				510
U.S. EPA Notice of Intent
Commitments and Contingencies
Penalties					$ 3,000,000
Penalty Matrix From PA DEP
Commitments and Contingencies
Penalties						$ 1,000,000
Law Suit Related To A Worker's Fatal Injury
Commitments and Contingencies
Insurance Coverage, Deductible Amount										$ 5,000,000
CSN
Commitments and Contingencies
Penalties per day												$ 21,000	R$ 100,000	$ 4,000	R$ 20,000