Quarterly report pursuant to Section 13 or 15(d)

DEBT AND CREDIT FACILITIES - Schedule of Extinguishment of Debt (Details)

v3.21.2
DEBT AND CREDIT FACILITIES - Schedule of Extinguishment of Debt (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 12, 2021
Mar. 11, 2021
Jun. 01, 2020
Apr. 24, 2020
Mar. 27, 2020
Mar. 13, 2020
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Feb. 11, 2021
Dec. 31, 2020
Extinguishment of Debt [Line Items]                        
Debt Extinguished       $ 736     $ 421 $ 748 $ 1,278 $ 1,488    
Common shares, issued (in shares)             506,832,537   506,832,537   20,000,000 506,832,537
Gain (Loss) on Extinguishment of Debt             $ (22) 130 $ (88) 133    
Reduction of Principal Long-Term Debt       $ 181                
Industrial Revenue Bonds                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished     $ 7                  
9.875% 2025 Senior Secured Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished   $ 322         25   347      
Gain (Loss) on Extinguishment of Debt             (5)   (47)      
4.875% 2024 Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished             0 6 395 6    
Gain (Loss) on Extinguishment of Debt             0 1 (14) 1    
7.625% 2021 AK Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished         $ 9 $ 364 0 0 34 373    
Gain (Loss) on Extinguishment of Debt             0 0 0 0    
7.50% Senior Secured Notes due July 2023                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished         $ 57 $ 311 0 0 13 367    
Gain (Loss) on Extinguishment of Debt             0 0 0 3    
6.375% 2025 Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished             0 168 64 168    
Gain (Loss) on Extinguishment of Debt             0 21 (7) 21    
6.375% 2025 AK Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished             0   29      
Gain (Loss) on Extinguishment of Debt             0   (3)      
5.75% 2025 Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished             396 77 396 77    
Gain (Loss) on Extinguishment of Debt             $ (17) 16 $ (17) 16    
Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished $ 535             12        
1.50% 2025 Convertible Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished               20   20    
Gain (Loss) on Extinguishment of Debt               1   1    
7.00% 2027 Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished               247   247    
Gain (Loss) on Extinguishment of Debt               29   29    
5.875% 2027 Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished               194   194    
Gain (Loss) on Extinguishment of Debt               49   49    
6.25% 2040 Senior Notes                        
Extinguishment of Debt [Line Items]                        
Debt Extinguished               36   36    
Gain (Loss) on Extinguishment of Debt               $ 13   $ 13