Intangible Assets, net and Goodwill - Reconciliation of the Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Goodwill [Roll Forward]
Balance at the beginning of the period	$ 2,888.4
Acquired goodwill	14.6
Foreign currency adjustments	27.7
Balance at the end of the period	2,930.7
Gaming
Goodwill [Roll Forward]
Balance at the beginning of the period	2,428.6
Acquired goodwill	0.0
Foreign currency adjustments	24.4
Balance at the end of the period	2,453.0
Lottery
Goodwill [Roll Forward]
Balance at the beginning of the period	350.0
Acquired goodwill	0.0
Foreign currency adjustments	3.3
Balance at the end of the period	353.3
Interactive
Goodwill [Roll Forward]
Balance at the beginning of the period	109.8
Acquired goodwill	14.6
Foreign currency adjustments	0.0
Balance at the end of the period	$ 124.4