Annual report pursuant to Section 13 and 15(d)

Leases - Financial Statement Location Tables (Details)

v3.20.4
Leases - Financial Statement Location Tables (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Right-of-use assets—Operating $ 99 $ 94  
Current operating lease liabilities 7 6  
Non-current operating lease liabilities 90 87  
Operating Leases, Rent Expense     $ 16
Operating costs and expenses [Member]      
Lessee, Lease, Description [Line Items]      
Operating lease cost [1],[2] 12 11  
Variable Lease, Cost 1 1  
Operating lease assets, net [Member]      
Lessee, Lease, Description [Line Items]      
Right-of-use assets—Operating 99 94  
Current operating lease liabilities [Member]      
Lessee, Lease, Description [Line Items]      
Current operating lease liabilities 7 6  
Non-current operating lease liabilities [Member]      
Lessee, Lease, Description [Line Items]      
Non-current operating lease liabilities $ 90 $ 87  
[1] Includes $1 million and $1 million of variable lease costs paid to the lessor during the years ended December 31, 2020 and 2019, respectively.
[2] Presented in cost of sales, operating and maintenance expense, general and administrative expense or general and administrative expense—affiliate consistent with the nature of the asset under lease.