Quarterly report pursuant to Section 13 or 15(d)

DEBT AND CREDIT FACILITIES - Schedule Of Long-Term Debt (Details)

v3.24.3
DEBT AND CREDIT FACILITIES - Schedule Of Long-Term Debt (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Aug. 16, 2024
Mar. 18, 2024
Dec. 31, 2023
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 3,835     $ 3,192
Unamortized discounts and issuance costs (61)     (55)
Long-term Debt 3,774     3,137
ABL Facility        
Debt Instrument [Line Items]        
Long-term Line of Credit $ 47      
Cleveland-Cliffs Inc. | 6.750% 2026 Senior Secured Notes        
Debt Instrument [Line Items]        
Stated interest rate 6.75%      
Annual Effective Interest Rate 6.99%      
Long-term Debt, Gross $ 0     829
Cleveland-Cliffs Inc. | 7.000% 2027 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate 7.00%      
Annual Effective Interest Rate 9.24%      
Long-term Debt, Gross $ 73     73
Cleveland-Cliffs Inc. | 5.875% 2027 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate 5.875%      
Annual Effective Interest Rate 6.49%      
Long-term Debt, Gross $ 556     556
Cleveland-Cliffs Inc. | 4.625% 2029 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate 4.625%      
Annual Effective Interest Rate 4.625%      
Long-term Debt, Gross $ 368     368
Cleveland-Cliffs Inc. | 6.750% 2030 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate 6.75%      
Annual Effective Interest Rate 6.75%      
Long-term Debt, Gross $ 750     750
Cleveland-Cliffs Inc. | 4.875% 2031 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate 4.875%      
Annual Effective Interest Rate 4.875%      
Long-term Debt, Gross $ 325     325
Cleveland-Cliffs Inc. | 7.000% 2032 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate 7.00%      
Annual Effective Interest Rate 7.054%      
Long-term Debt, Gross $ 1,425 $ 600 $ 825 0
Cleveland-Cliffs Inc. | 6.250% 2040 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate 6.25%      
Annual Effective Interest Rate 6.34%      
Long-term Debt, Gross $ 235     235
Cleveland-Cliffs Inc. | ABL Facility        
Debt Instrument [Line Items]        
Annual Effective Interest Rate 8.25%      
Long-term Line of Credit $ 47     0
Cleveland-Cliffs Inc. | ABL Facility | Minimum        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Effective Percentage on Incremental Borrowings 5.63%      
Cleveland-Cliffs Inc. | ABL Facility | Maximum        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Effective Percentage on Incremental Borrowings 8.25%      
AK Steel | 7.000% 2027 AK Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate 7.00%      
Annual Effective Interest Rate 9.24%      
Long-term Debt, Gross $ 56     $ 56