Annual report pursuant to Section 13 and 15(d)

Leases - Additional Information (Details)

v3.19.3.a.u2
Leases - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Lessee, Lease, Description [Line Items]      
Operating right-of-use asset $ 29    
Finance lease, ROU asset 37 $ 41  
Finance lease liabilities, noncurrent 55 59  
ROU asset obtained in exchange for operating lease liability 22    
Operating lease, payments 9    
Finance lease, principal payments 5    
Finance lease, right-of-use asset, amortization 5    
Finance lease, interest expense 3    
Operating lease, cost $ 6    
Rent expense   8 $ 5
Accounting Standards Update 2016-02      
Lessee, Lease, Description [Line Items]      
Operating right-of-use asset   $ 12