Consolidated Statements Of Comprehensive Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net revenue:
Racing	$ 274.3	$ 257.3	$ 251.1
Online Wagering	290.2	255.6	221.6
Casino	411.2	350.5	332.8
Other Investments	33.3	19.2	16.9
Total net revenue	1,009.0	882.6	822.4
Operating expense:
Racing	204.9	192.5	187.7
Online Wagering	196.1	170.2	146.7
Casino	284.1	247.3	241.3
Other Investments	32.2	17.8	16.5
Corporate	2.1	2.0	1.8
Selling, general and administrative expense	90.5	83.1	79.4
Impairment of tangible and other intangible assets	0.0	21.7	0.0
Gain on Calder land sale	0.0	0.0	(23.7)
Transaction expense, net	10.3	2.3	0.2
Total operating expense	820.2	736.9	649.9
Operating income	188.8	145.7	172.5
Other income (expense):
Interest expense, net	(40.1)	(49.3)	(43.7)
Loss on extinguishment of debt	0.0	(20.7)	0.0
Equity in income of unconsolidated investments	29.6	25.5	17.4
Gain on Ocean Downs/Saratoga transaction	54.9	0.0	0.0
Miscellaneous, net	0.7	1.3	1.2
Total other income (expense)	45.1	(43.2)	(25.1)
Income from continuing operations before provision for income taxes	233.9	102.5	147.4
Income tax (provision) benefit	(51.3)	19.9	(50.7)
Income from continuing operations, net of tax	182.6	122.4	96.7
Income from discontinued operations, net of tax	170.2	18.1	11.4
Net income	$ 352.8	$ 140.5	$ 108.1
Net income per common share data - basic:
Continuing operations (in dollars per share)	$ 4.42	$ 2.59	$ 1.94
Discontinued operations (in dollars per share)	4.12	0.38	0.23
Net income per common share - basic (in dollars per share)	8.54	2.97	2.17
Net income per common share data - diluted:
Continuing operations (in dollars per share)	4.39	2.55	1.92
Discontinued operations (in dollars per share)	4.09	0.37	0.22
Net income per common share - diluted (in dollars per share)	$ 8.48	$ 2.92	$ 2.14
Weighted average shares outstanding:
Basic (in shares)	41.3	47.2	49.3
Diluted (in shares)	41.6	48.0	50.5
Other comprehensive income (loss):
Foreign currency translation, net of tax	$ 0.6	$ (0.1)	$ 0.2
Change in pension benefits, net of tax	(0.2)	0.0	(0.8)
Other comprehensive income (loss)	0.4	(0.1)	(0.6)
Comprehensive income	$ 353.2	$ 140.4	$ 107.5