Description of the Business and Summary of Significant Accounting Policies - Property and Equipment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Accelerated depreciation expense	$ 8.7
Minimum | Lottery and other machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		3 years
Minimum | Gaming equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		1 year
Minimum | Transportation equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		3 years
Minimum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Minimum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		15 years
Maximum | Lottery and other machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		15 years
Maximum | Gaming equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Maximum | Transportation equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		8 years
Maximum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		10 years
Maximum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		40 years
United Kingdom | Gaming Machines
Property, Plant and Equipment [Line Items]
Restructuring, accelerated depreciation expense			$ 8.7	$ 6.6