Income Taxes (Details) - USD ($) $ in Millions				6 Months Ended
	Jun. 08, 2016	Apr. 01, 2016	Feb. 03, 2016	Jun. 30, 2017	Jun. 30, 2016
Related Party Transaction [Line Items]
Income tax rate				15.10%	14.10%
Affiliated Entity | Retailco
Related Party Transaction [Line Items]
Number of shares of common stock exchanged	1,000,000	3,450,000	2,000,000
Net deferred tax asset	$ 5.3	$ 7.6	$ 8.0
Long-term deferred tax liability	6.9	10.3	10.3
Long-term deferred tax asset	$ 2.6	$ 3.9	$ 3.9
NuDevco Retail Holdings and NuDevco Retail
Related Party Transaction [Line Items]
Net deferred tax asset				$ 15.6
Payable pursuant to the TRA				49.9
Long-term deferred tax asset related to the TRA				$ 19.7