Basis Of Presentation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 D	Jun. 30, 2012 D	Jun. 30, 2013 D	Jun. 30, 2012 D	Dec. 31, 2012
Promotional Allowance [Line Items]
Live Racing Days	124	122	180	178
Customer Loyalty Program Liability	$ 2.2		$ 2.2		$ 2.1
Promotional Allowances	9.1	5.1	16.4	9.5
Estimated Cost Of Providing Promotional Allowances	2.4	1.2	4.7	2.4
Racing Operations
Promotional Allowance [Line Items]
Promotional Allowances	0.3	0.3	0.4	0.5
Online Operations
Promotional Allowance [Line Items]
Promotional Allowances	3.7	2.3	6.1	4.0
Gaming Operations
Promotional Allowance [Line Items]
Promotional Allowances	$ 5.1	$ 2.5	$ 9.8	$ 5.0