Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Supplemental Condensed Consolidating Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Condensed Financial Statements
Net cash provided by operating activities	$ 233.4	$ 95.6
Cash flows from investing activities:
Additions to property and equipment	(32.4)	(22.9)
Lottery and gaming services expenditures	(73.1)	(51.3)
Intangible assets and software expenditures	(70.8)	(38.1)
Payments to Acquire Businesses, Net of Cash Acquired	0	0.4
Equity method investments	(43.3)
Distributions of capital on equity investments	45.4	19.4
Proceeds from sale of equity interest	44.9	0
Other	(0.6)	(4.1)
Intercompany balances	0	0
Net cash used in investing activities	(129.9)	(116.8)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(29.4)	(9.5)
Common stock repurchases	(29.5)	0
Contingent earnout payments	(10.2)	0
Net redemptions of common stock under stock-based compensation plans	(19.1)	(2.1)
Payment of financing fees	(22.8)	(2.0)
Payments on license obligations	(7.0)	0
Other, principally intercompany balances	0	0
Net cash used in financing activities	(118.0)	(13.6)
Effect of exchange rate changes on cash	(6.7)	(0.7)
Decrease in cash and cash equivalents	(21.2)	(35.5)
Cash and cash equivalents, beginning of period	153.7	109.0
Cash and cash equivalents, end of period	132.5	73.5
Parent Company
Condensed Financial Statements
Net cash provided by operating activities	(79.2)	(44.7)
Cash flows from investing activities:
Additions to property and equipment	(2.3)	(3.3)
Lottery and gaming services expenditures	(0.1)	(0.2)
Intangible assets and software expenditures	(6.0)	(2.1)
Payments to Acquire Businesses, Net of Cash Acquired		0
Equity method investments	0
Distributions of capital on equity investments	0
Proceeds from sale of equity interest	0
Other	(9.6)	9.9
Intercompany balances	0	32.3
Net cash used in investing activities	(18.0)	36.6
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	0	0
Common stock repurchases	(29.5)
Contingent earnout payments	0
Net redemptions of common stock under stock-based compensation plans	(19.1)	(2.1)
Payment of financing fees	0	0
Payments on license obligations	0
Other, principally intercompany balances	126.2	0
Net cash used in financing activities	77.6	(2.1)
Effect of exchange rate changes on cash	0	0
Decrease in cash and cash equivalents	(19.6)	(10.2)
Cash and cash equivalents, beginning of period	56.0	27.2
Cash and cash equivalents, end of period	36.4	17.0
SGI
Condensed Financial Statements
Net cash provided by operating activities	19.8	(16.1)
Cash flows from investing activities:
Additions to property and equipment	(2.1)	(1.8)
Lottery and gaming services expenditures	(9.7)	(6.4)
Intangible assets and software expenditures	(12.1)	(12.2)
Payments to Acquire Businesses, Net of Cash Acquired		0
Equity method investments	0
Distributions of capital on equity investments	(1.3)
Proceeds from sale of equity interest	0
Other	29.2	14.0
Intercompany balances	18.8	0
Net cash used in investing activities	22.8	(6.4)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(19.5)	(4.7)
Common stock repurchases	0
Contingent earnout payments	0
Net redemptions of common stock under stock-based compensation plans	0	0
Payment of financing fees	(22.8)	(2.0)
Payments on license obligations	0
Other, principally intercompany balances	0	29.0
Net cash used in financing activities	(42.3)	22.3
Effect of exchange rate changes on cash	0	0.2
Decrease in cash and cash equivalents	0.3	0
Cash and cash equivalents, beginning of period	0	0.2
Cash and cash equivalents, end of period	0.3	0.2
Guarantor Subsidiaries
Condensed Financial Statements
Net cash provided by operating activities	160.0	43.3
Cash flows from investing activities:
Additions to property and equipment	(22.1)	(12.2)
Lottery and gaming services expenditures	(41.3)	(0.4)
Intangible assets and software expenditures	(49.9)	(11.7)
Payments to Acquire Businesses, Net of Cash Acquired		0
Equity method investments	0
Distributions of capital on equity investments	0
Proceeds from sale of equity interest	0
Other	(0.6)	0
Intercompany balances	(44.9)	(23.4)
Net cash used in investing activities	(158.8)	(47.7)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	0	0
Common stock repurchases	0
Contingent earnout payments	(7.0)
Net redemptions of common stock under stock-based compensation plans	0	0
Payment of financing fees	0	0
Payments on license obligations	(7.0)
Other, principally intercompany balances	0	0
Net cash used in financing activities	(14.0)	0
Effect of exchange rate changes on cash	(0.3)	0
Decrease in cash and cash equivalents	(13.1)	(4.4)
Cash and cash equivalents, beginning of period	24.4	2.4
Cash and cash equivalents, end of period	11.3	(2.0)
Non-Guarantor Subsidiaries
Condensed Financial Statements
Net cash provided by operating activities	132.8	113.1
Cash flows from investing activities:
Additions to property and equipment	(5.9)	(5.6)
Lottery and gaming services expenditures	(22.0)	(44.3)
Intangible assets and software expenditures	(2.8)	(12.1)
Payments to Acquire Businesses, Net of Cash Acquired		0.4
Equity method investments	(43.3)
Distributions of capital on equity investments	46.7
Proceeds from sale of equity interest	44.9
Other	16.1	36.3
Intercompany balances	0	0
Net cash used in investing activities	33.7	(26.1)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(9.9)	(4.8)
Common stock repurchases	0
Contingent earnout payments	(3.2)
Net redemptions of common stock under stock-based compensation plans	(35.7)	(64.3)
Payment of financing fees	0	0
Payments on license obligations	0
Other, principally intercompany balances	(100.1)	(37.9)
Net cash used in financing activities	(148.9)	(107.0)
Effect of exchange rate changes on cash	(6.4)	(0.9)
Decrease in cash and cash equivalents	11.2	(20.9)
Cash and cash equivalents, beginning of period	73.3	79.2
Cash and cash equivalents, end of period	84.5	58.3
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
Payments to Acquire Businesses, Net of Cash Acquired		0
Equity method investments	0
Distributions of capital on equity investments	0
Proceeds from sale of equity interest	0
Other	(35.7)	(64.3)
Intercompany balances	26.1	(8.9)
Net cash used in investing activities	(9.6)	(73.2)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	0	0
Common stock repurchases	0
Contingent earnout payments	0
Net redemptions of common stock under stock-based compensation plans	35.7	64.3
Payment of financing fees	0	0
Payments on license obligations	0
Other, principally intercompany balances	(26.1)	8.9
Net cash used in financing activities	9.6	73.2
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