Intangible Assets, net and Goodwill - Reconciliation of the Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill [Roll Forward]
Balance at the beginning of the period	$ 2,888.4
Acquired goodwill	14.6
Foreign currency adjustments	58.3
Balance at the end of the period	2,961.3
Gaming
Goodwill [Roll Forward]
Balance at the beginning of the period	2,428.6
Acquired goodwill	0.0
Foreign currency adjustments	51.3
Balance at the end of the period	2,479.9
Lottery
Goodwill [Roll Forward]
Balance at the beginning of the period	350.0
Acquired goodwill	0.0
Foreign currency adjustments	7.0
Balance at the end of the period	357.0
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