Annual report pursuant to Section 13 and 15(d)

Leases - Lease Maturity (Details)

v3.20.4
Leases - Lease Maturity (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Leases      
2020 $ 4    
2021 4    
2022 3    
2023 2    
2024 1    
Thereafter 3    
Total minimum lease payments 17    
Less: amount of lease payments representing interest 2    
Present value of future minimum lease payments 15    
Less: current obligations under leases 4 $ 5  
Long-term lease obligations $ 11 $ 24  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent us-gaap:OtherLiabilitiesNoncurrent  
Finance Leases      
2020 $ 7    
2021 7    
2022 7    
2023 8    
2024 8    
Thereafter 29    
Total minimum lease payments 66    
Less: amount of lease payments representing interest 11    
Present value of future minimum lease payments 55 $ 60  
Less: current obligations under leases 5 5  
Long-term lease obligations $ 50 $ 55 $ 59