Acquisitions and Dispositions - 2014 Acquisitions Narrative (Details) (USD $)	3 Months Ended				12 Months Ended		0 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Nov. 21, 2014	Oct. 18, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					$ (429,700,000)	$ (409,400,000)
Goodwill	1,183,100,000				4,108,300,000	1,183,100,000			801,400,000
Acquisition-related costs expensed	11,100,000	2,800,000	2,700,000	4,400,000
Gaming
Business Acquisition [Line Items]
Goodwill	612,700,000				3,499,700,000	612,700,000			262,700,000
Bally Acquisition
Business Acquisition [Line Items]
Consideration transferred							5,100,000,000
Indebtedness							1,900,000,000
Goodwill							2,956,100,000
Acquisition-related costs expensed							76,600,000
Weighted-average remaining useful life (in years)					9 years 5 months
Contractual amount							234,100,000
Amount expected not to be collected							17,000,000
Notes receivable contractual amount							68,200,000
Notes receivable not to be collected							1,500,000
Deferred revenue							10,300,000
Bally Acquisition | Depreciation and amortization
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					(143,700,000)	(168,200,000)
Bally Acquisition | Cost of sales
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					(6,600,000)
Bally Acquisition | Acquisition-related costs
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					100,500,000
Bally Acquisition | Equity Related Awards
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					41,000,000
Bally Acquisition | Interest expense
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					(285,700,000)	(380,700,000)
Adjustment to interest expense					64,700,000
Bally Acquisition | Loss On Extinguishment Of Debt
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					25,900,000
Bally Acquisition | Income tax expense
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					33,000,000	76,600,000
Bally Acquisition | Reversal Income Tax Benefit
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations					79,100,000
Bally Acquisition | Gaming
Business Acquisition [Line Items]
Goodwill							2,956,100,000
Bally Acquisition | Capitalized Software
Business Acquisition [Line Items]
Weighted-average remaining useful life (in years)							4 years 5 months
WMS Acquisition
Business Acquisition [Line Items]
Consideration transferred								1,485,900,000
Unaudited pro forma net loss from continuing operations						(60,300,000)			(94,300,000)
Goodwill								381,800,000
WMS Acquisition | Depreciation and amortization
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations						(22,200,000)			(60,900,000)
WMS Acquisition | Cost of sales
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations						(13,000,000)
WMS Acquisition | Acquisition-related costs
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations						74,000,000			2,500,000
WMS Acquisition | Interest expense
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations						(61,000,000)			(83,000,000)
WMS Acquisition | Income tax expense
Business Acquisition [Line Items]
Unaudited pro forma net loss from continuing operations						12,500,000			33,300,000
WMS Acquisition | Gaming
Business Acquisition [Line Items]
Goodwill								$ 381,800,000