Goodwill And Indefinite-Lived Intangible Assets Impairment Test Intangible Table (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 218.7	$ 224.8
Finite-Lived Intangible Assets, Accumulated Amortization	(118.6)	(86.9)
Finite-Lived Intangible Assets, Net	100.1	137.9
Indefinite-Lived Intangible Assets (Excluding Goodwill)	358.3	358.3
Other intangible assets, net	458.4	$ 496.2
Customer Relationships [Member] | TwinSpires [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Period Increase (Decrease)	(4.6)
Customer Relationships [Member] | Big Fish Games [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Period Increase (Decrease)	(1.7)
Table Games License [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	0.2
Calder
Finite-Lived Intangible Assets [Line Items]
Annual License Fees	$ 2.3