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Acquisitions (Acquisitions) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Nov. 21, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Revenue from Consolidated Statements of Operations and Comprehensive Loss		$ (691.5)	$ (416.9)	$ (1,350.2)	$ (805.0)
Net loss from Consolidated Statements of Operations and Comprehensive Loss		(102.2)	(72.4)	(188.6)	(117.4)
Goodwill		4,048.7		4,048.7		$ 4,108.3	$ 1,183.1
WMS Acquisition
Business Acquisition [Line Items]
Purchase price	$ 5,100.0
Impairments	1,900.0
Add: Bally revenue not reflected in Consolidated Statements of Operations and Comprehensive Loss			350.4		697.3
Unaudited pro forma revenue			767.3		1,502.3
Add: Bally net income not reflected in Consolidated Statements of Operations and Comprehensive Loss adjusted by pro forma adjustments (1), (2), (3), (4) and (5) below			(36.5)		(72.1)
Unaudited pro forma net loss			(108.9)		(189.5)
Interactive
Business Acquisition [Line Items]
Goodwill		$ 3,449.4		$ 3,449.4		$ 3,499.7	$ 612.7
Interactive \| WMS Acquisition
Business Acquisition [Line Items]
Goodwill	$ 2,956.1
Depreciation and amortization \| WMS Acquisition
Business Acquisition [Line Items]
Unaudited pro forma net loss			(39.9)		(70.2)
Acquisition-related fees and expenses \| WMS Acquisition
Business Acquisition [Line Items]
Unaudited pro forma net loss			3.0		5.2
Interest expense \| WMS Acquisition
Business Acquisition [Line Items]
Unaudited pro forma net loss			(73.6)		(151.1)
Loss on early extinguishment of debt \| WMS Acquisition
Business Acquisition [Line Items]
Unaudited pro forma net loss			(25.9)
Income tax expense \| WMS Acquisition
Business Acquisition [Line Items]
Unaudited pro forma net loss			$ 32.1		$ 72.1