Basis Of Presentation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012 D	Sep. 30, 2011 D	Sep. 30, 2012 D	Sep. 30, 2011 D	Dec. 31, 2011
Promotional Allowance [Line Items]
Live Racing Days	112	111	290	278
Customer Loyalty Program Liability	$ 1.8		$ 1.8		$ 2.7
Promotional Allowances	5.2	4.5	14.6	12.6
Estimated Cost Of Providing Promotional Allowances	1.3	1.1	3.7	3.3
Racing Operations
Promotional Allowance [Line Items]
Promotional Allowances	0.3	0.5	0.8	1.4
Online Operations
Promotional Allowance [Line Items]
Promotional Allowances	2.4	1.7	6.3	4.8
Gaming Operations
Promotional Allowance [Line Items]
Promotional Allowances	$ 2.5	$ 2.3	$ 7.5	$ 6.4