Intangible Assets and Goodwill - Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012
Amortizable intangible assets:
Amortizable intangible assets, gross carrying amount	$ 2,100.2	$ 407.2
Amortizable intangible assets, accumulated amortization	170.1	98.9
Amortizable intangible assets, net balance	1,930.1	308.3
Non-amortizable intangible assets
Total intangible assets, gross carrying amount	2,423.8	512.1
Total intangible assets, accumulated amortization	172.2	101.0
Total intangible assets, net balance	2,251.6	411.1
Amortization of intangible assets	89.0	32.5	17.6
Estimated amortization expense, 2015	218.6
Estimated amortization expense, 2016	224.9
Estimated amortization expense, 2017	218.0
Estimated amortization expense, 2018	204.3
Estimated amortization expense, 2019	186.2
Asset impairment charge			3.1
Bally Acquisition
Non-amortizable intangible assets
Purchase accounting adjustments	1,800.3
Trade names
Non-amortizable intangible assets
Non-amortizable intangible assets, gross carrying amount	323.6	104.9
Non-amortizable intangible assets, accumulated amortization	2.1	2.1
Non-amortizable intangible assets, net balance	321.5	102.8
Trade names | Depreciation and amortization
Non-amortizable intangible assets
Asset impairment charge	6.0
Patents
Amortizable intangible assets:
Amortizable intangible assets, gross carrying amount	17.9	14.5
Amortizable intangible assets, accumulated amortization	8.4	7.1
Amortizable intangible assets, net balance	9.5	7.4
Customer relationships
Amortizable intangible assets:
Amortizable intangible assets, gross carrying amount	883.2	161.9
Amortizable intangible assets, accumulated amortization	46.7	24.0
Amortizable intangible assets, net balance	836.5	137.9
Licenses
Amortizable intangible assets:
Amortizable intangible assets, gross carrying amount	332.8	181.0
Amortizable intangible assets, accumulated amortization	88.5	59.9
Amortizable intangible assets, net balance	244.3	121.1
Licenses | Bally Acquisition
Non-amortizable intangible assets
Intangible assets acquired	106
Intellectual property
Amortizable intangible assets:
Amortizable intangible assets, gross carrying amount	736.3	8.6
Amortizable intangible assets, accumulated amortization	19.5	5.7
Amortizable intangible assets, net balance	716.8	2.9
Brand names
Amortizable intangible assets:
Amortizable intangible assets, gross carrying amount	128.2	39.3
Amortizable intangible assets, accumulated amortization	5.3	0.6
Amortizable intangible assets, net balance	122.9	38.7
Non-compete agreements
Amortizable intangible assets:
Amortizable intangible assets, gross carrying amount	0.3	0.4
Amortizable intangible assets, accumulated amortization	0.2	0.2
Amortizable intangible assets, net balance	0.1	0.2
Lottery contracts
Amortizable intangible assets:
Amortizable intangible assets, gross carrying amount	1.5	1.5
Amortizable intangible assets, accumulated amortization	1.5	1.4
Amortizable intangible assets, net balance	0	0.1
Non-amortizable intangible assets
Asset impairment charge				$ 5.8