Litigation - Narrative (Details) COP in Billions			1 Months Ended			6 Months Ended	12 Months Ended
	Aug. 03, 2015 USD ($)	Apr. 16, 2012 EUR (€)	Feb. 28, 2015 EUR (€)	May. 31, 2013 USD ($)	May. 31, 2013 COP	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Loss contingency accrual						$ 14,100,000	$ 47,300,000
Legal contingencies, liability, estimated range						13,400,000
Czech Republic Barcrest
Loss Contingencies [Line Items]
Litigation settlement, amount | €			€ 25,000,000.0
Loss contingency, third party erroneous winning jackpot face amount, in excess of | €		€ 400,000,000.0
Loss contingency, third party loss | €		€ 1,500,000
Ecosalud
Loss Contingencies [Line Items]
Litigation settlement, amount				$ 34,800,000	COP 90
WMS Merger
Loss Contingencies [Line Items]
Loss contingency, damages sought, value						900,000
Oregon State Lottery Matter
Loss Contingencies [Line Items]
Loss contingency, damages claimed, value, in excess of							$ 134,000,000.0
Bally Technologies Inc.
Loss Contingencies [Line Items]
Loss contingency, damages sought, value						100,000,000
Guarantee of business revenue
Loss Contingencies [Line Items]
Loss contingency possible amount of damages						5,000,000.0
Performance guarantee
Loss Contingencies [Line Items]
Loss contingency deposit of surety bond						$ 4,000,000.0
Subsequent Event | WMS Merger
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	$ 400,000