Commitments and Contingencies (Details)			1 Months Ended	12 Months Ended
	Dec. 06, 2018 USD ($)	Jun. 04, 2018 USD ($)	Aug. 31, 2005 USD ($)	Dec. 31, 2020 USD ($) defendant case claim	Dec. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Nov. 01, 2019 USD ($)	Nov. 01, 2019 BRL (R$)	Mar. 19, 2019 USD ($)	Mar. 19, 2019 BRL (R$)
Commitments and Contingencies
Accrual for Environmental Loss Contingencies				$ 7,000,000.0
Penalties per day							$ 4,800	R$ 25,000	$ 1,000	R$ 5,000
Penalties							1,925,000	10,000,000
Loss contingency, Brazilian labor claims
Commitments and Contingencies
Liabilities for asserted and unasserted claims				$ 4,300,000		$ 6,500,000
Other
Commitments and Contingencies
Number of pending claims | claim				17,159
Loss provision				$ 0
Loss Contingency, Number of Defendants | defendant				90
Loss Contingency, Claims Dismissed, Number | case				28,310
Other | Minimum
Commitments and Contingencies
Loss Contingency, Damages Sought, Value				$ 20,000,000
Other | Maximum
Commitments and Contingencies
Loss Contingency, Damages Sought, Value				$ 25,000,000
Pending Litigation, Active Or In Extremis Docket | Other
Commitments and Contingencies
Number of pending claims | claim				50
Sao Paulo State Revenue Authority | Value-Added Tax Assessments January 2004 To May 2005
Commitments and Contingencies
Loss Contingency, Damages Sought, Principal Amount				$ 1,200,000
Estimated claims or assessment, additional amount		$ 7,000,000		16,300,000
Sao Paulo State Revenue Authority | Value-Added Tax Assessments January 2002 To December 2003
Commitments and Contingencies
Loss Contingency, Damages Sought, Principal Amount			$ 1,200,000
Estimated claims or assessment, additional amount	$ 6,000,000		3,700,000
Loss Contingency, Damages Sought, Value	$ 800,000		$ 4,900,000
Loss provision				$ 0
New York County as managed by the New York Supreme Court | Other
Commitments and Contingencies
Number of pending claims | case				16,599
New York County as managed by the New York Supreme Court | Pending And Future Litigation, Deferred Or Inactive Docket | Other
Commitments and Contingencies
Number of pending claims | claim				16,549
New York State Supreme Court, Counties Excluding New York County [Member] | Other
Commitments and Contingencies
Number of pending claims | case				119
Courts Located In States Other Than New York | Other
Commitments and Contingencies
Number of pending claims | case				441
NETHERLANDS
Commitments and Contingencies
Estimated claims or assessment, additional amount				$ 700,000
Brazil
Commitments and Contingencies
Loss Contingencies, Unpaid Service Taxes					$ 1,800,000
Loss Contingencies, Overall Liability				$ 3,000,000.0
CSN [Member]
Commitments and Contingencies
Penalties per day							$ 19,300	R$ 100,000	$ 3,900	R$ 20,000