Revenue Recognition - Summary of Revenue by Type (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Gaming
Disaggregation of Revenue [Line Items]
Revenue	$ 470.7	$ 457.2	$ 913.7	$ 897.2
Gaming | Gaming operations
Disaggregation of Revenue [Line Items]
Revenue	159.9	178.4	321.3	350.8
Gaming | Gaming machine sales
Disaggregation of Revenue [Line Items]
Revenue	167.6	163.3	312.4	319.5
Gaming | Gaming systems
Disaggregation of Revenue [Line Items]
Revenue	84.3	67.1	159.3	128.6
Gaming | Table products
Disaggregation of Revenue [Line Items]
Revenue	58.9	48.4	120.7	98.3
Lottery
Disaggregation of Revenue [Line Items]
Revenue	207.1	202.3	408.8	391.4
Lottery | Instant products
Disaggregation of Revenue [Line Items]
Revenue	150.1	151.3	300.3	293.0
Lottery | Lottery systems
Disaggregation of Revenue [Line Items]
Revenue	57.0	51.0	108.5	98.4
Social
Disaggregation of Revenue [Line Items]
Revenue	99.7	91.1	197.1	171.3
Social | Social gaming
Disaggregation of Revenue [Line Items]
Revenue	99.7	91.1	197.1	171.3
Digital
Disaggregation of Revenue [Line Items]
Revenue	67.2	15.7	136.9	31.8
Digital | Sports and platform
Disaggregation of Revenue [Line Items]
Revenue	20.5	0.0	46.4	0.0
Digital | Gaming and other
Disaggregation of Revenue [Line Items]
Revenue	$ 46.7	$ 15.7	$ 90.5	$ 31.8