Intangible Assets, net and Goodwill - Reconciliation of the Carrying Amount of Goodwill (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) unit
Goodwill and Intangible Assets Disclosure [Abstract]
Number of reporting units | unit	9
Goodwill [Roll Forward]
Balance at the beginning of the period	$ 2,956.1
Reporting unit reallocation adjustment	0.0
Acquired goodwill	376.4
Foreign currency adjustments	40.0
Balance at the end of the period	3,372.5
Gaming
Goodwill [Roll Forward]
Balance at the beginning of the period	2,475.5
Reporting unit reallocation adjustment	0.0
Acquired goodwill	0.0
Foreign currency adjustments	20.3
Balance at the end of the period	2,495.8
Lottery
Goodwill [Roll Forward]
Balance at the beginning of the period	356.2
Reporting unit reallocation adjustment	0.0
Acquired goodwill	0.0
Foreign currency adjustments	1.5
Balance at the end of the period	357.7
Interactive
Goodwill [Roll Forward]
Balance at the beginning of the period	124.4
Reporting unit reallocation adjustment	(124.4)
Acquired goodwill	0.0
Foreign currency adjustments	0.0
Balance at the end of the period	0.0
Social
Goodwill [Roll Forward]
Balance at the beginning of the period	0.0
Reporting unit reallocation adjustment	116.9
Acquired goodwill	0.0
Foreign currency adjustments	0.0
Balance at the end of the period	116.9
Digital
Goodwill [Roll Forward]
Balance at the beginning of the period	0.0
Reporting unit reallocation adjustment	7.5
Acquired goodwill	376.4
Foreign currency adjustments	18.2
Balance at the end of the period	$ 402.1