Income Taxes - Components of Deferred Tax Balances (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Deferred tax asset - current	$ 0.0	$ 0.0
Deferred tax asset - non-current	0.0	0.0
Deferred tax liability - current	0.0	0.0
Deferred tax liability - non-current	(1.0)	(1.2)
Net deferred tax liabilities	$ (1.0)	$ (1.2)