Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,547.9		$ 1,317.2
Accumulated depreciation	(635.4)		(559.7)
Right-of-use assets	24.8
Total	912.5	$ 782.8	757.5
Total	937.3
Grandstands and buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	625.2		532.8
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	406.5		356.3
Tracks and other improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	222.3		207.3
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	162.4		140.5
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	79.2		73.3
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 52.3		$ 7.0