Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Supplemental Condensed Consolidating Statement of Income) (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Financial Statements
Revenue		$ 671.6		$ 415.6	$ 2,021.8	$ 1,220.6
Cost of services, cost of product sales and cost of instant games (1)	[1]	250.0		199.2	780.7	574.4
Selling, general and administrative		136.8		95.6	423.6	282.6
Research and development		45.9		26.3	140.8	77.0
Employee termination and restructuring		5.6		1.9	19.0	12.4
Depreciation and amortization		286.5		100.4	692.9	290.5
Goodwill impairment		535.0		0.0	535.0	0.0
Operating loss		(588.2)		(7.8)	(570.2)	(16.3)
Interest expense		(166.8)		(45.7)	(497.5)	(142.9)
Other (expense) income, net		(4.5)		(10.9)	(8.0)	(10.0)
Net loss before income taxes		(759.5)		(64.4)	(1,075.7)	(169.2)
Equity in (loss) income of subsidiaries		0.0		0.0	0.0	0.0
Income tax benefit (expense)		81.3		(5.4)	208.9	(18.0)
Net loss		(678.2)		(69.8)	(866.8)	(187.2)
Other comprehensive (loss) income		(49.0)		(55.1)	(136.1)	(51.4)
Comprehensive (loss) income		(727.2)		(124.9)	(1,002.9)	(238.6)
Parent Company
Condensed Financial Statements
Revenue		0.0		0.0	0.0	0.0
Cost of services, cost of product sales and cost of instant games (1)		0.0	[1]	0.0	0.0	0.0
Selling, general and administrative		16.2		19.5	47.8	51.6
Research and development		0.0		0.0	0.0	0.0
Employee termination and restructuring		1.4		(0.1)	4.6	1.9
Depreciation and amortization		8.3		1.2	24.3	6.7
Goodwill impairment		0.0			0.0
Operating loss		(25.9)		(20.6)	(76.7)	(60.2)
Interest expense		3.3		(0.2)	(0.6)	(2.5)
Other (expense) income, net		6.9		(7.0)	24.9	(39.6)
Net loss before income taxes		(15.7)		(27.8)	(52.4)	(102.3)
Equity in (loss) income of subsidiaries		(745.9)		(38.8)	(1,027.2)	(71.7)
Income tax benefit (expense)		83.5		(3.2)	212.9	(13.2)
Net loss		(678.1)		(69.8)	(866.7)	(187.2)
Other comprehensive (loss) income		(49.1)		(55.1)	(136.2)	(51.4)
Comprehensive (loss) income		(727.2)		(124.9)	(1,002.9)	(238.6)
SGI
Condensed Financial Statements
Revenue		106.5		106.9	324.1	317.1
Cost of services, cost of product sales and cost of instant games (1)	[1]	77.7		79.0	238.0	235.0
Selling, general and administrative		15.9		16.8	50.5	50.9
Research and development		0.8		1.2	3.6	2.3
Employee termination and restructuring		0.6		0.0	1.5	0.2
Depreciation and amortization		10.5		11.8	30.1	32.1
Goodwill impairment		0.0			0.0
Operating loss		1.0		(1.9)	0.4	(3.4)
Interest expense		22.1		(16.2)	(97.2)	(62.7)
Other (expense) income, net		19.3		(6.1)	55.2	(9.2)
Net loss before income taxes		42.4		(24.2)	(41.6)	(75.3)
Equity in (loss) income of subsidiaries		11.8		16.3	41.1	51.4
Income tax benefit (expense)		(0.1)		(0.2)	(0.2)	(0.3)
Net loss		54.1		(8.1)	(0.7)	(24.2)
Other comprehensive (loss) income		(3.1)		(5.4)	(12.9)	(2.4)
Comprehensive (loss) income		51.0		(13.5)	(13.6)	(26.6)
Guarantor Subsidiaries
Condensed Financial Statements
Revenue		404.2		221.2	1,267.1	655.0
Cost of services, cost of product sales and cost of instant games (1)	[1]	125.6		91.2	410.4	270.5
Selling, general and administrative		68.9		40.4	214.0	122.5
Research and development		37.9		20.9	115.0	62.5
Employee termination and restructuring		2.9		1.4	9.8	5.5
Depreciation and amortization		234.3		67.7	533.9	187.5
Goodwill impairment		460.2			460.2
Operating loss		(525.6)		(0.4)	(476.2)	6.5
Interest expense		(192.0)		(29.1)	(399.3)	(77.0)
Other (expense) income, net		(8.2)		(7.9)	(77.0)	(8.7)
Net loss before income taxes		(725.8)		(37.4)	(952.5)	(79.2)
Equity in (loss) income of subsidiaries		(93.2)		(5.5)	(89.9)	(12.5)
Income tax benefit (expense)		(0.9)		0.0	2.0	0.0
Net loss		(819.9)		(42.9)	(1,040.4)	(91.7)
Other comprehensive (loss) income		56.9		0.0	48.4	(0.3)
Comprehensive (loss) income		(763.0)		(42.9)	(992.0)	(92.0)
Non-Guarantor Subsidiaries
Condensed Financial Statements
Revenue		236.9		149.7	707.2	428.4
Cost of services, cost of product sales and cost of instant games (1)	[1]	122.7		91.2	408.9	248.7
Selling, general and administrative		35.8		18.9	111.3	57.6
Research and development		7.2		4.2	22.2	12.2
Employee termination and restructuring		0.7		0.6	3.1	4.8
Depreciation and amortization		33.4		19.7	104.6	64.2
Goodwill impairment		74.8			74.8
Operating loss		(37.7)		15.1	(17.7)	40.9
Interest expense		(0.2)		(0.2)	(0.4)	(0.7)
Other (expense) income, net		(22.5)		10.1	(11.1)	47.5
Net loss before income taxes		(60.4)		25.0	(29.2)	87.7
Equity in (loss) income of subsidiaries		0.0		0.0	0.0	0.0
Income tax benefit (expense)		(1.2)		(2.0)	(5.8)	(4.5)
Net loss		(61.6)		23.0	(35.0)	83.2
Other comprehensive (loss) income		(104.1)		(55.7)	(181.3)	(45.6)
Comprehensive (loss) income		(165.7)		(32.7)	(216.3)	37.6
Eliminating Entries
Condensed Financial Statements
Revenue		(76.0)		(62.2)	(276.6)	(179.9)
Cost of services, cost of product sales and cost of instant games (1)	[1]	(76.0)		(62.2)	(276.6)	(179.8)
Selling, general and administrative		0.0		0.0	0.0	0.0
Research and development		0.0		0.0	0.0	0.0
Employee termination and restructuring		0.0		0.0	0.0	0.0
Depreciation and amortization		0.0		0.0	0.0	0.0
Goodwill impairment		0.0			0.0
Operating loss		0.0		0.0	0.0	(0.1)
Interest expense		0.0		0.0	0.0	0.0
Other (expense) income, net		0.0		0.0	0.0	0.0
Net loss before income taxes		0.0		0.0	0.0	(0.1)
Equity in (loss) income of subsidiaries		827.3		28.0	1,076.0	32.8
Income tax benefit (expense)		0.0		0.0	0.0	0.0
Net loss		827.3		28.0	1,076.0	32.7
Other comprehensive (loss) income		50.4		61.1	145.9	48.3
Comprehensive (loss) income		$ 877.7		$ 89.1	$ 1,221.9	$ 81.0

[1] Exclusive of depreciation and amortization.