Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,317.2	$ 1,122.1
Accumulated depreciation	(559.7)	(514.1)
Total	757.5	608.0
Grandstands and buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	532.8	439.8
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	356.3	286.7
Tracks and other improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	207.3	177.9
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	140.5	131.7
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	73.3	62.5
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 7.0	$ 23.5