Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Lease liabilities	$ 6.8
Deferred compensation plans	5.9	$ 5.8
Deferred income	4.8	5.6
Net operating losses and credit carryforward	3.4	3.7
Deferred liabilities	2.7	2.2
Allowance for uncollectible receivables	1.0	0.9
Deferred tax assets	24.6	18.2
Valuation allowance	(0.2)	(0.2)
Net deferred tax asset	24.4	18.0
Deferred tax liabilities:
Equity investments in excess of tax basis	114.8	6.9
Intangible assets in excess of tax basis	60.2	49.3
Property and equipment in excess of tax basis	53.4	38.7
Right-of-use assets	6.8
Other	2.0	1.3
Deferred tax liabilities	237.2	96.2
Net deferred tax liability	$ (212.8)	$ (78.2)