Property and Equipment - Gaming and Lottery Machinery and Equipment Summary (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,012.8	$ 773.1
Gaming equipment
Property, Plant and Equipment [Line Items]
Lottery machinery and equipment	799.9	439.2
Less: accumulated depreciation	(279.1)	(145.0)
Property and equipment	520.8	294.2
Lottery machinery and equipment
Property, Plant and Equipment [Line Items]
Lottery machinery and equipment	311.7	350.3
Less: accumulated depreciation	(207.4)	(210.6)
Property and equipment	104.3	139.7
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	$ 625.1	$ 433.9