Revenue Recognition - Summary of Revenue by Type (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenue	$ 823.0	$ 768.9	$ 766.3	$ 725.4	$ 752.2	$ 720.0	$ 729.2	$ 682.0	$ 3,083.6	$ 2,883.4	$ 2,758.8
Gaming
Segment Reporting Information [Line Items]
Total revenue									1,844.3	1,772.7	1,773.6
Lottery
Segment Reporting Information [Line Items]
Total revenue									811.5	777.9	775.2
Interactive
Segment Reporting Information [Line Items]
Total revenue									427.8	332.8	210.0
Gaming operations | Gaming
Segment Reporting Information [Line Items]
Total revenue									696.0	725.3	763.2
Gaming machine sales | Gaming
Segment Reporting Information [Line Items]
Total revenue									672.4	618.2	571.1
Gaming systems | Gaming
Segment Reporting Information [Line Items]
Total revenue									274.0	240.8	273.0
Table products | Gaming
Segment Reporting Information [Line Items]
Total revenue									201.9	188.4	166.3
Instant products | Lottery
Segment Reporting Information [Line Items]
Total revenue									588.0	573.7	557.2
Lottery systems | Lottery
Segment Reporting Information [Line Items]
Total revenue									223.5	204.2	218.0
Social B2C | Interactive
Segment Reporting Information [Line Items]
Total revenue									362.0	274.4	170.6
Other | Interactive
Segment Reporting Information [Line Items]
Total revenue									$ 65.8	$ 58.4	$ 39.4