Annual report pursuant to Section 13 and 15(d)

Leases - Lease Related Assets and Liabilities (Details)

v3.20.4
Leases - Lease Related Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Assets      
Operating lease assets $ 14 $ 29  
Finance lease assets 33 37 $ 41
Total lease assets 47 66  
Liabilities      
Operating lease liabilities, current 4 5  
Finance lease liabilities, current 5 5  
Operating lease liabilities, noncurrent 11 24  
Finance lease liabilities, noncurrent 50 55 $ 59
Total lease liabilities $ 70 $ 89