Income Taxes Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Unrealized foreign exchange	$ 0.1	$ 0.3
U.S. Federal operating losses and credits	0.4	0.0
U.S. State operating losses and credits	2.0	1.8
Non-deductible interest carryforward	7.4	2.5
Other	1.3	0.6
Sub-total deferred income tax assets	11.2	5.2
Valuation allowance	(1.3)	(0.6)
Net deferred income tax assets	9.9	4.7
Depreciation	(14.4)	(4.1)
Amortization	(110.7)	(70.2)
Total deferred tax liabilities	(125.1)	(74.3)
Net total deferred tax liabilities before unrecognized tax benefits	(115.2)	(69.6)
Deferred tax impact of unrecognized tax benefits	0.2	0.1
Net total deferred tax liabilities after unrecognized tax benefits	$ (115.0)	$ (69.5)