Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,051.5	$ 1,003.0
Accumulated depreciation	(477.1)	(429.8)
Total	574.4	573.2
Grandstands and buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	414.3	412.4
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	275.5	252.1
Tracks and other improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	157.3	142.8
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	117.5	118.7
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	57.4	52.1
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	27.4	22.8
Artwork
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2.1	$ 2.1