Revenue Recognition - Summary of Revenue by Type (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 821.0	$ 768.9	$ 2,477.5	$ 2,260.6
Gaming
Disaggregation of Revenue [Line Items]
Revenue		454.6		1,351.8
Gaming | Gaming operations
Disaggregation of Revenue [Line Items]
Revenue	159.2	176.0	480.5	526.8
Gaming | Gaming machine sales
Disaggregation of Revenue [Line Items]
Revenue	167.2	163.1	479.6	482.6
Gaming | Gaming systems
Disaggregation of Revenue [Line Items]
Revenue	69.7	62.0	229.0	190.6
Gaming | Table products
Disaggregation of Revenue [Line Items]
Revenue	51.8	53.5	172.5	151.8
Lottery
Disaggregation of Revenue [Line Items]
Revenue		202.9		594.3
Lottery | Instant products
Disaggregation of Revenue [Line Items]
Revenue	142.0	142.7	442.3	435.7
Lottery | Lottery systems
Disaggregation of Revenue [Line Items]
Revenue	64.8	60.2	173.3	158.6
Social | Social gaming
Disaggregation of Revenue [Line Items]
Revenue	105.1	95.1	302.2	266.4
Digital
Disaggregation of Revenue [Line Items]
Revenue		16.3		48.1
Digital | Sports and platform
Disaggregation of Revenue [Line Items]
Revenue	20.8	0.0	67.2	0.0
Digital | Gaming and other
Disaggregation of Revenue [Line Items]
Revenue	$ 40.4	$ 16.3	$ 130.9	$ 48.1