Equity Investments - Hellenic Lotteries (Details) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Jul. 31, 2013 Hellenic Lotteries EUR (€)	Dec. 31, 2014 Hellenic Lotteries USD ($)	Dec. 31, 2013 Hellenic Lotteries EUR (€)	Sep. 30, 2014 Hellenic Lotteries
Schedule of Equity Method Investments [Line Items]
Equity interest (as a percent)							16.50%
Concession period				12 years
Upfront fees associated with the new concession				€ 190.0
Upfront fees share related to the entity				31.4
Contribution of working capital						0.3
Payments to equity method investment	48.2	86.1	0			31.7
Earnings (loss) from equity investments	(7.6)	1.5	28.1		2.3
Revenue from the sale of instant tickets to equity method investment					6.3
Accounts receivable from equity method investment					$ 0.1