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 9 Months Ended
Mar. 12, 2021
Mar. 11, 2021
Jun. 01, 2020
Apr. 24, 2020
Mar. 27, 2020
Mar. 13, 2020
Sep. 30, 2021
Jun. 30, 2021
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Feb. 11, 2021
Dec. 31, 2020
Extinguishment of Debt [Line Items]                            
Debt Extinguished       $ 736     $ 2       $ 1,280 $ 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             $ 0   $ 0   $ (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         0       347      
Gain (Loss) on Extinguishment of Debt             0       (47)      
4.875% 2024 Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished             0       395 6    
Gain (Loss) on Extinguishment of Debt             0       (14) 1    
7.625% 2021 AK Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished         $ 9 $ 364 0       34 373    
Gain (Loss) on Extinguishment of Debt             0       0 0    
7.500% Senior Secured Notes due July 2023                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished         $ 57 $ 311 0       13 367    
Gain (Loss) on Extinguishment of Debt             0       0 3    
6.375% 2025 Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished             0       64 168    
Gain (Loss) on Extinguishment of Debt             0       (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)      
5.750% 2025 Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished             0 $ 396     396 77    
Gain (Loss) on Extinguishment of Debt             0       (17) 16    
Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished $ 535             $ 25   $ 12        
1.500% 2025 Convertible Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished             2       2 20    
Gain (Loss) on Extinguishment of Debt             $ 0       $ 0 1    
7.000% 2027 Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished                       247    
Gain (Loss) on Extinguishment of Debt                       29    
5.875% 2027 Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished                       194    
Gain (Loss) on Extinguishment of Debt                       49    
6.250% 2040 Senior Notes                            
Extinguishment of Debt [Line Items]                            
Debt Extinguished                       36    
Gain (Loss) on Extinguishment of Debt                       $ 13