Description of the Business and Summary of Significant Accounting Policies - Summary of Revenue by Type (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Revenue	$ 768.9	$ 720.0	$ 2,260.6	$ 2,131.2
Gaming
Segment Reporting Information [Line Items]
Revenue	454.6	448.2	1,351.8	1,311.8
Gaming | Gaming operations
Segment Reporting Information [Line Items]
Revenue	176.0	182.4	526.8	552.8
Gaming | Gaming machine sales
Segment Reporting Information [Line Items]
Revenue	163.1	159.8	482.6	448.7
Gaming | Gaming systems
Segment Reporting Information [Line Items]
Revenue	62.0	57.6	190.6	176.8
Gaming | Table products
Segment Reporting Information [Line Items]
Revenue	53.5	48.4	151.8	133.5
Lottery
Segment Reporting Information [Line Items]
Revenue	202.9	186.6	594.3	578.2
Lottery | Instant products
Segment Reporting Information [Line Items]
Revenue	142.7	140.3	435.7	431.3
Lottery | Lottery systems
Segment Reporting Information [Line Items]
Revenue	60.2	46.3	158.6	146.9
Interactive
Segment Reporting Information [Line Items]
Revenue	111.4	85.2	314.5	241.2
Interactive | Social Gaming - B2C
Segment Reporting Information [Line Items]
Revenue	95.1	70.3	266.4	199.5
Interactive | Other
Segment Reporting Information [Line Items]
Revenue	$ 16.3	$ 14.9	$ 48.1	$ 41.7