Merger With VLP (Details) - USD ($) $ / shares in Units, $ in Millions		6 Months Ended
	Jan. 10, 2019	Jun. 30, 2020	Jun. 30, 2019
Merger (Textual)
Merger transaction, aggregate merger consideration funded with available cash on hand		$ 0	$ 950
VLP [Member]
Merger (Textual)
Merger transaction, price per common unit (in usd per unit)	$ 42.25
Merger transaction, aggregate merger consideration funded with available cash on hand	$ 950