Annual report pursuant to Section 13 and 15(d)

Leases - Additional Information (Details)

v3.20.4
Leases - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Lessee, Lease, Description [Line Items]      
Operating right-of-use asset   $ 14 $ 29
Finance lease, ROU asset $ 41 33 37
Finance lease liabilities, noncurrent 59 $ 50 55
Rent expense $ 8    
Accounting Standards Update 2016-02      
Lessee, Lease, Description [Line Items]      
Operating right-of-use asset     $ 12