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Customer Concentrations (Tables)

12 Months Ended

Dec. 31, 2022

Risks and Uncertainties [Abstract]

Schedules of concentration of risk, by risk factor

The tables below show sales to the Company's significant customers:

									Year Ended December 31,
									2022																					2021
									Sales and other operating revenue						Percent of Company sales and other operating revenue															Sales and other operating revenue						Percent of Company sales and other operating revenue
									(Dollars in millions)
Cliffs Steel(1)									$	1,182.8					60.0		%													$	994.6					68.3		%
U.S. Steel(2)									$	284.8					14.4		%													$	210.0					14.4		%

						Years Ended December 31,
						2020
						Sales and other operating revenue						Percent of Company sales and other operating revenue
						(Dollars in millions)
Cliffs Steel / AM USA(1)(3)						$	687.3					51.6		%
Cliffs Steel / AK Steel(1)(3)						$	355.8					26.7		%
U.S. Steel(2)						$	208.2					15.6		%

(1)Represents revenues included in our Domestic Coke segment.

(2)Represents revenues included in our Domestic Coke and Logistics segments.

(3)In March 2020, Cleveland-Cliffs Inc. completed the acquisition of AK Steel Holding Corporation ("AK Steel"), and subsequently changed the name of AK Steel to Cleveland-Cliffs Steel Holding Corporation. In December 2020, Cliffs completed the acquisition of ArcelorMittal USA LLC ("AM USA"), and subsequently changed the name of AM USA to Cleveland-Cliffs Steel LLC. As stated above, subsequent to the acquisitions we collectively refer to these subsidiaries as Cliffs Steel.

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- Definition

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

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