Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Supplemental Condensed Consolidating Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements
Net cash provided by operating activities	$ 107.1	$ 70.0
Cash flows from investing activities:
Additions to property and equipment	(21.1)	(15.0)
Lottery and gaming services expenditures	(44.8)	(43.1)
Intangible assets and software expenditures	(48.8)	(22.4)
Equity method investments	(40.6)
Distributions of capital on equity investments	32.9	16.3
Proceeds from sale of equity interest	44.9	0
Business acquisitions, net of cash acquired	0	(0.4)
Other	(1.1)	(3.1)
Intercompany balances	0	0
Net cash used in investing activities	(78.6)	(84.0)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(16.8)	(9.1)
Common stock repurchases	(29.5)	0
Contingent earnout payments	(3.2)	0
Net redemptions of common stock under stock-based compensation plans	(19.2)	(2.8)
Payment of financing fees	(22.8)	(2.0)
Other, principally intercompany balances	0	0
Net cash used in financing activities	(91.5)	(13.9)
Effect of exchange rate changes on cash	(1.5)	(3.0)
Decrease in cash and cash equivalents	(64.5)	(30.9)
Cash and cash equivalents, beginning of period	153.7	109.0
Cash and cash equivalents, end of period	89.2	78.1
Parent Company
Condensed Financial Statements
Net cash provided by operating activities	(54.6)	(24.1)
Cash flows from investing activities:
Additions to property and equipment	(2.2)	(3.6)
Lottery and gaming services expenditures	(0.1)	(0.2)
Intangible assets and software expenditures	(3.7)	0
Equity method investments	0
Distributions of capital on equity investments	0
Proceeds from sale of equity interest	0
Business acquisitions, net of cash acquired		0
Other	0	(0.2)
Intercompany balances	0	19.8
Net cash used in investing activities	(6.0)	15.8
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	0	0
Common stock repurchases	(29.5)	0
Contingent earnout payments	0
Net redemptions of common stock under stock-based compensation plans	(19.2)	(2.8)
Payment of financing fees		0
Other, principally intercompany balances	69.6	0
Net cash used in financing activities	20.9	(2.8)
Effect of exchange rate changes on cash	0	0
Decrease in cash and cash equivalents	(39.7)	(11.1)
Cash and cash equivalents, beginning of period	56.0	27.2
Cash and cash equivalents, end of period	16.3	16.1
SGI
Condensed Financial Statements
Net cash provided by operating activities	8.8	(9.2)
Cash flows from investing activities:
Additions to property and equipment	(0.3)	(0.8)
Lottery and gaming services expenditures	(9.0)	(2.3)
Intangible assets and software expenditures	(6.8)	(7.1)
Equity method investments	0
Distributions of capital on equity investments	1.1
Proceeds from sale of equity interest	0
Business acquisitions, net of cash acquired		0
Other	22.0	9.8
Intercompany balances	20.9	0
Net cash used in investing activities	27.9	(0.4)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(13.8)	(3.1)
Common stock repurchases	0	0
Contingent earnout payments	0
Net redemptions of common stock under stock-based compensation plans	0	0
Payment of financing fees		(2.0)
Other, principally intercompany balances	0	14.7
Net cash used in financing activities	(36.6)	9.6
Effect of exchange rate changes on cash	0	(0.1)
Decrease in cash and cash equivalents	0.1	(0.1)
Cash and cash equivalents, beginning of period	0	0.1
Cash and cash equivalents, end of period	0.1	0
Guarantor Subsidiaries
Condensed Financial Statements
Net cash provided by operating activities	62.7	28.3
Cash flows from investing activities:
Additions to property and equipment	(13.3)	(6.7)
Lottery and gaming services expenditures	(25.3)	(0.3)
Intangible assets and software expenditures	(29.0)	(7.7)
Equity method investments	0
Distributions of capital on equity investments	0
Proceeds from sale of equity interest	0
Business acquisitions, net of cash acquired		0
Other	(1.3)	0
Intercompany balances	(16.2)	(14.1)
Net cash used in investing activities	(85.1)	(28.8)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	0	0
Common stock repurchases	0	0
Contingent earnout payments	0
Net redemptions of common stock under stock-based compensation plans	0	0
Payment of financing fees		0
Other, principally intercompany balances	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash	(0.7)	0
Decrease in cash and cash equivalents	(23.1)	(0.5)
Cash and cash equivalents, beginning of period	24.4	2.4
Cash and cash equivalents, end of period	1.3	1.9
Non-Guarantor Subsidiaries
Condensed Financial Statements
Net cash provided by operating activities	90.2	75.0
Cash flows from investing activities:
Additions to property and equipment	(5.3)	(3.9)
Lottery and gaming services expenditures	(10.4)	(40.3)
Intangible assets and software expenditures	(9.3)	(7.6)
Equity method investments	(40.6)
Distributions of capital on equity investments	31.8
Proceeds from sale of equity interest	44.9
Business acquisitions, net of cash acquired		(0.4)
Other	5.9	48.7
Intercompany balances	0	0
Net cash used in investing activities	17.0	(3.5)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(3.0)	(6.0)
Common stock repurchases	0	0
Contingent earnout payments	(3.2)
Net redemptions of common stock under stock-based compensation plans	(27.7)	(61.4)
Payment of financing fees		0
Other, principally intercompany balances	(74.3)	(20.4)
Net cash used in financing activities	(108.2)	(87.8)
Effect of exchange rate changes on cash	(0.8)	(2.9)
Decrease in cash and cash equivalents	(1.8)	(19.2)
Cash and cash equivalents, beginning of period	73.3	79.3
Cash and cash equivalents, end of period	71.5	60.1
Eliminating Entries
Condensed Financial Statements
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Additions to property and equipment	0	0
Lottery and gaming services expenditures	0	0
Intangible assets and software expenditures	0	0
Equity method investments	0
Distributions of capital on equity investments	0
Proceeds from sale of equity interest	0
Business acquisitions, net of cash acquired		0
Other	(27.7)	(61.4)
Intercompany balances	(4.7)	(5.7)
Net cash used in investing activities	(32.4)	(67.1)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	0	0
Common stock repurchases	0	0
Contingent earnout payments	0
Net redemptions of common stock under stock-based compensation plans	27.7	61.4
Payment of financing fees		0
Other, principally intercompany balances	4.7	5.7
Net cash used in financing activities	32.4	67.1
Effect of exchange rate changes on cash	0	0
Decrease in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	$ 0	$ 0