Intangible Assets, net 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, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill
Balance at the beginning of the period				$ 3,013.7	$ 2,888.4	$ 3,013.7
Foreign currency adjustments					53.1	(56.3)
Impairment charges	$ (69.0)	$ 0.0	$ 0.0	0.0	0.0	(69.0)	$ (1,002.6)
Acquired goodwill					14.6
Balance at the end of the period	2,888.4				2,956.1	2,888.4	3,013.7
Gaming
Goodwill
Balance at the beginning of the period				2,486.0	2,428.6	2,486.0
Foreign currency adjustments					46.9	(57.4)
Impairment charges						0.0	(935.0)
Acquired goodwill					0.0
Balance at the end of the period	2,428.6				2,475.5	2,428.6	2,486.0
Cumulative goodwill impairment charges					935.0
Lottery
Goodwill
Balance at the beginning of the period				417.9	350.0	417.9
Foreign currency adjustments					6.2	1.1
Impairment charges	(69.0)					(69.0)
Acquired goodwill					0.0
Balance at the end of the period	350.0				356.2	350.0	417.9
Cumulative goodwill impairment charges					136.6
Interactive
Goodwill
Balance at the beginning of the period				$ 109.8	109.8	109.8
Foreign currency adjustments					0.0	0.0
Impairment charges						0.0
Acquired goodwill					14.6
Balance at the end of the period	$ 109.8				$ 124.4	$ 109.8	$ 109.8