Property and Equipment (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 93.9		$ 55.8	$ 176.3	$ 108.3
Property, plant and equipment, gross	287.0	$ 292.8		287.0
Property, plant and equipment, net	902.2	1,012.8		902.2
Capital lease assets
Property, Plant and Equipment [Line Items]
Accumulated amortization	9.2	5.3		9.2
Gaming equipment
Property, Plant and Equipment [Line Items]
Accumulated amortization	260.5	279.1		260.5
Property, plant and equipment, gross	773.8	799.9		773.8
Property, plant and equipment, net	513.3	520.8		513.3
Gaming | Gaming equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	59.9			59.9
Gaming | Land and Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	27.5			$ 27.5
Bally Technologies Inc.
Property, Plant and Equipment [Line Items]
Asset impairment charges	7.1
Bally Technologies Inc. | Gaming
Property, Plant and Equipment [Line Items]
Asset impairment charges	5.2
Bally Technologies Inc. | Gaming | Manufacturing Facility
Property, Plant and Equipment [Line Items]
Asset impairment charges		$ 9.4
Bally Technologies Inc. | Gaming | Sales
Property, Plant and Equipment [Line Items]
Asset impairment charges	$ 4.9