Description of the Business and Summary of Significant Accounting Policies - Summary of Revenue by Type (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Revenue	$ 766.3	$ 729.2	$ 1,491.7	$ 1,411.2
Gaming
Segment Reporting Information [Line Items]
Revenue	457.2	441.9	897.2	863.6
Gaming | Gaming operations
Segment Reporting Information [Line Items]
Revenue	178.4	186.0	350.8	370.4
Gaming | Gaming machine sales
Segment Reporting Information [Line Items]
Revenue	163.3	154.4	319.5	288.9
Gaming | Gaming systems
Segment Reporting Information [Line Items]
Revenue	67.1	59.5	128.6	119.2
Gaming | Table products
Segment Reporting Information [Line Items]
Revenue	48.4	42.0	98.3	85.1
Lottery
Segment Reporting Information [Line Items]
Revenue	202.3	203.9	391.4	391.6
Lottery | Instant products
Segment Reporting Information [Line Items]
Revenue	151.3	153.7	293.0	291.0
Lottery | Lottery systems
Segment Reporting Information [Line Items]
Revenue	51.0	50.2	98.4	100.6
Interactive
Segment Reporting Information [Line Items]
Revenue	106.8	83.4	203.1	156.0
Interactive | Social Gaming - B2C
Segment Reporting Information [Line Items]
Revenue	91.1	69.1	171.3	129.2
Interactive | Other
Segment Reporting Information [Line Items]
Revenue	$ 15.7	$ 14.3	$ 31.8	$ 26.8