Intangible Assets and Goodwill - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill
Balance at the beginning of the period				$ 3,013.7				$ 4,108.3	$ 3,013.7	$ 4,108.3
Foreign currency adjustments									(56.3)	(92.0)
Impairment charges	$ (69.0)	$ 0.0	$ 0.0	0.0	$ (67.6)	$ (935.0)	$ 0.0	0.0	(69.0)	(1,002.6)	$ 0.0
Balance at the end of the period	2,888.4				3,013.7				2,888.4	3,013.7	4,108.3
Gaming
Goodwill
Balance at the beginning of the period				2,486.0				3,499.7	2,486.0	3,499.7
Foreign currency adjustments									(57.4)	(78.7)
Impairment charges						$ (935.0)			0.0	(935.0)
Balance at the end of the period	2,428.6				2,486.0				2,428.6	2,486.0	3,499.7
Lottery
Goodwill
Balance at the beginning of the period				417.9				498.8	417.9	498.8
Foreign currency adjustments									1.1	(13.3)
Impairment charges									(69.0)	(67.6)
Balance at the end of the period	350.0				417.9				350.0	417.9	498.8
Interactive
Goodwill
Balance at the beginning of the period				$ 109.8				$ 109.8	109.8	109.8
Foreign currency adjustments									0.0	0.0
Impairment charges									0.0	0.0
Balance at the end of the period	$ 109.8				$ 109.8				$ 109.8	$ 109.8	$ 109.8