Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Restructuring, Impairment and Plant Closing Costs - Accrued Restructuring Costs By Type of Cost and Initiative (Details)

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Note 7 - Restructuring, Impairment and Plant Closing Costs - Accrued Restructuring Costs By Type of Cost and Initiative (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Accrued liabilities, beginning balance $ 31  
Accrued liabilities, ending balance 40  
Initiatives 2020 and Prior [Member]    
Restructuring Charges, Total 14 $ 0
Restructuring payments (7)  
Initiatives 2021 [Member]    
Restructuring Charges, Total 2 $ 0
Employee Severance [Member]    
Accrued liabilities, beginning balance 29  
Accrued liabilities, ending balance 38  
Employee Severance [Member] | Initiatives 2020 and Prior [Member]    
Restructuring Charges, Total 12  
Restructuring payments (5)  
Employee Severance [Member] | Initiatives 2021 [Member]    
Restructuring Charges, Total 2  
Demolition and Decommissioning [Member]    
Accrued liabilities, beginning balance 0  
Accrued liabilities, ending balance 0  
Demolition and Decommissioning [Member] | Initiatives 2020 and Prior [Member]    
Restructuring Charges, Total 0  
Restructuring payments 0  
Demolition and Decommissioning [Member] | Initiatives 2021 [Member]    
Restructuring Charges, Total 0  
Non-cancelable Lease Cost and Contract Termination Costs [Member]    
Accrued liabilities, beginning balance 2  
Accrued liabilities, ending balance 2  
Non-cancelable Lease Cost and Contract Termination Costs [Member] | Initiatives 2020 and Prior [Member]    
Restructuring Charges, Total 0  
Restructuring payments 0  
Non-cancelable Lease Cost and Contract Termination Costs [Member] | Initiatives 2021 [Member]    
Restructuring Charges, Total 0  
Other Restructuring [Member]    
Accrued liabilities, beginning balance 0  
Accrued liabilities, ending balance 0  
Other Restructuring [Member] | Initiatives 2020 and Prior [Member]    
Restructuring Charges, Total 2  
Restructuring payments (2)  
Other Restructuring [Member] | Initiatives 2021 [Member]    
Restructuring Charges, Total $ 0