Basis Of Presentation and Summary of Significant Accounting Policies - Promotional Allowance (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Promotional Allowance [Line Items]
Promotional allowances	$ 33.0	$ 21.5	$ 17.1
Estimated cost of providing promotional allowances	9.5	5.7	4.6
Racing Operations
Promotional Allowance [Line Items]
Promotional allowances	0.9	1.0	2.0
Online Operations
Promotional Allowance [Line Items]
Promotional allowances	12.3	9.3	6.5
Gaming Operations
Promotional Allowance [Line Items]
Promotional allowances	$ 19.8	$ 11.2	$ 8.7