Annual report pursuant to Section 13 and 15(d)

Credit Facilities - Schedule of Minimum Maturities (Details)

v3.10.0.1
Credit Facilities - Schedule of Minimum Maturities (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Line of Credit Facility [Line Items]    
Total debt $ 835 $ 1,211
Senior Secured Revolving Credit Facility [Member] | Rep-Based Facility [Member]    
Line of Credit Facility [Line Items]    
2019 10  
2020 8  
2021 8  
2022 8  
2023 15  
Total debt $ 49