Revenue Recognition - Summary of Revenue by Type (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total revenue	$ 885.7	$ 821.0	$ 844.7	$ 811.8	$ 823.0	$ 768.9	$ 766.3	$ 725.4	$ 3,363.2	$ 3,083.6	$ 2,883.4
Gaming
Segment Reporting Information [Line Items]
Total revenue									1,831.4	1,844.3	1,772.7
Lottery
Segment Reporting Information [Line Items]
Total revenue									846.3	811.5	777.9
Social
Segment Reporting Information [Line Items]
Total revenue									415.9	362.0	274.4
Digital
Segment Reporting Information [Line Items]
Total revenue									269.6	65.8	58.4
Gaming operations | Gaming
Segment Reporting Information [Line Items]
Total revenue									631.9	696.0	725.3
Gaming machine sales | Gaming
Segment Reporting Information [Line Items]
Total revenue									646.3	672.4	618.2
Gaming systems | Gaming
Segment Reporting Information [Line Items]
Total revenue									320.6	274.0	240.8
Table products | Gaming
Segment Reporting Information [Line Items]
Total revenue									232.6	201.9	188.4
Instant products
Segment Reporting Information [Line Items]
Total revenue									592.3	582.3	563.2
Instant products | Lottery
Segment Reporting Information [Line Items]
Total revenue									592.5	588.0	573.7
Lottery systems | Lottery
Segment Reporting Information [Line Items]
Total revenue									253.8	223.5	204.2
Mobile | Social
Segment Reporting Information [Line Items]
Total revenue									322.9	259.6	187.1
Web and other | Social
Segment Reporting Information [Line Items]
Total revenue									93.0	102.4	87.3
Sports and platform | Digital
Segment Reporting Information [Line Items]
Total revenue									100.5	0.0	0.0
Gaming and other | Digital
Segment Reporting Information [Line Items]
Total revenue									$ 169.1	$ 65.8	$ 58.4