Annual report pursuant to Section 13 and 15(d)

Subsequent events Subsequent Events (Details)

v3.19.1
Subsequent events Subsequent Events (Details) - Subsequent Event
$ in Millions
Mar. 05, 2019
USD ($)
agreement
Feb. 01, 2019
director
Subsequent Event [Line Items]    
Number of Directors | director   7
Number of agreements related to the sale | agreement 2  
February 2019 Sale    
Subsequent Event [Line Items]    
Consideration received from transfer of ownership $ 5  
December 2018 Sale    
Subsequent Event [Line Items]    
Consideration received from transfer of ownership $ 2