Revenue Recognition - Summary of Revenue by Type (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Gaming
Disaggregation of Revenue [Line Items]
Revenue	$ 443.0	$ 440.0
Gaming | Gaming operations
Disaggregation of Revenue [Line Items]
Revenue	161.3	172.4
Gaming | Gaming machine sales
Disaggregation of Revenue [Line Items]
Revenue	144.8	156.2
Gaming | Gaming systems
Disaggregation of Revenue [Line Items]
Revenue	75.0	61.5
Gaming | Table products
Disaggregation of Revenue [Line Items]
Revenue	61.9	49.9
Lottery
Disaggregation of Revenue [Line Items]
Revenue	201.7	189.1
Lottery | Instant products
Disaggregation of Revenue [Line Items]
Revenue	150.2	141.7
Lottery | Lottery systems
Disaggregation of Revenue [Line Items]
Revenue	51.5	47.4
Social
Disaggregation of Revenue [Line Items]
Revenue	97.4	80.2
Social | Social gaming
Disaggregation of Revenue [Line Items]
Revenue	97.4	80.2
Digital
Disaggregation of Revenue [Line Items]
Revenue	69.7	16.1
Digital | Sports and platform
Disaggregation of Revenue [Line Items]
Revenue	25.9	0.0
Digital | Gaming and other
Disaggregation of Revenue [Line Items]
Revenue	$ 43.8	$ 16.1