Intangible Assets and Goodwill (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible amortization expense	$ 181.5	$ 18.1	$ 331.8	$ 49.0
Discount rate	9.00%		9.00%
Impairment of intangible assets (excluding goodwill)	$ 103.6	103.6		128.6
Number of Reporting Units			7
Gross Carrying Amount	$ 2,211.5		$ 2,211.5		$ 2,100.2
Terminal revenue growth rate	2.00%		2.00%
Goodwill impairment	$ 535.0	$ 0.0	$ 535.0	$ 0.0
Goodwill	$ 3,485.2		3,485.2		4,108.3	$ 1,183.1
Depreciation and amortization | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Asset impairment charges			$ 25.0
Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Royalty rates	0.50%		0.50%
Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Royalty rates	1.00%		1.00%
Gaming
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment			$ 535.0
Goodwill	$ 2,887.7		2,887.7		$ 3,499.7	$ 612.7
Gaming | SG Gaming reporting unit
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	535.0
Goodwill	1,483.7		1,483.7
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 97.5		$ 97.5