Annual report pursuant to Section 13 and 15(d)

Credit facilities - Schedule of Minimum Maturities (Details)

v3.19.3.a.u2
Credit facilities - Schedule of Minimum Maturities (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Line of Credit Facility [Line Items]    
Total debt $ 700 $ 835
Senior Secured Revolving Credit Facility | Rep-Based Facility    
Line of Credit Facility [Line Items]    
2020 0  
2021 8  
2022 8  
2023 15  
Total debt $ 31