Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Supplemental Condensed Consolidating Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Condensed Financial Statements
Net cash provided by operating activities	$ 83.3	$ 23.2
Cash flows from investing activities:
Additions to property and equipment	(12.2)	(7.3)
Lottery and gaming services expenditures	24.7	16.9
Lottery, gaming and other capital expenditures and intangible and software expenditures		(36.3)
Intangible assets and software expenditures	(22.7)	(12.1)
Equity method investments	(17.7)
Distributions of capital on equity investments	22.4	0
Proceeds from sale of equity interest	44.9	0
Business acquisitions, net of cash acquired	0	(0.3)
Other	(1.0)	1.7
Intercompany balances	0	0
Net cash used in investing activities	(11.0)	(34.9)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(6.0)	(0.7)
Common stock repurchases	(29.5)	0
Contingent earnout payments	(1.8)	0
Net redemptions of common stock under stock-based compensation plans	(19.2)	(2.9)
Other, principally intercompany balances	0	0
Net cash used in financing activities	(56.5)	(3.6)
Effect of exchange rate changes on cash	(0.4)	(3.7)
Increase (decrease) in cash and cash equivalents	15.4	(19.0)
Cash and cash equivalents, beginning of period	153.7	109.0
Cash and cash equivalents, end of period	169.1	90.0
Parent Company
Condensed Financial Statements
Net cash provided by operating activities	(36.1)	(15.2)
Cash flows from investing activities:
Additions to property and equipment	(1.5)
Lottery, gaming and other capital expenditures and intangible and software expenditures		(1.5)
Intangible assets and software expenditures	(1.4)
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	9.3
Net cash used in investing activities	(2.9)	7.6
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	(19.2)	(2.9)
Other, principally intercompany balances	74.4	0
Net cash used in financing activities	25.7	(2.9)
Effect of exchange rate changes on cash	0	0
Increase (decrease) in cash and cash equivalents	(13.3)	(10.5)
Cash and cash equivalents, beginning of period	56.0	27.2
Cash and cash equivalents, end of period	42.7	16.7
SGI
Condensed Financial Statements
Net cash provided by operating activities	(7.1)	0.6
Cash flows from investing activities:
Additions to property and equipment	(0.1)
Lottery and gaming services expenditures	4.4
Lottery, gaming and other capital expenditures and intangible and software expenditures		(4.2)
Intangible assets and software expenditures	(3.2)
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	0	0
Intercompany balances	19.7	0
Net cash used in investing activities	13.1	(4.2)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(5.8)	(1.6)
Common stock repurchases	0
Contingent earnout payments	0
Net redemptions of common stock under stock-based compensation plans	0	0
Other, principally intercompany balances	0	5.5
Net cash used in financing activities	(5.8)	3.9
Effect of exchange rate changes on cash	0	(0.3)
Increase (decrease) in cash and cash equivalents	0.2	0
Cash and cash equivalents, beginning of period	0	0.2
Cash and cash equivalents, end of period	0.2	0.2
Guarantor Subsidiaries
Condensed Financial Statements
Net cash provided by operating activities	56.7	1.8
Cash flows from investing activities:
Additions to property and equipment	(7.7)
Lottery and gaming services expenditures	16.6
Lottery, gaming and other capital expenditures and intangible and software expenditures		(8.4)
Intangible assets and software expenditures	(13.7)
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	(0.8)	0
Intercompany balances	(30.5)	6.3
Net cash used in investing activities	(69.3)	(2.1)
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	0	0
Other, principally intercompany balances	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash	(0.4)	0
Increase (decrease) in cash and cash equivalents	(13.0)	(0.3)
Cash and cash equivalents, beginning of period	24.4	2.4
Cash and cash equivalents, end of period	11.4	2.1
Non-Guarantor Subsidiaries
Condensed Financial Statements
Net cash provided by operating activities	69.8	36.0
Cash flows from investing activities:
Additions to property and equipment	(2.9)
Lottery and gaming services expenditures	3.7
Lottery, gaming and other capital expenditures and intangible and software expenditures		(22.2)
Intangible assets and software expenditures	(4.4)
Equity method investments	(17.7)
Distributions of capital on equity investments	21.3
Proceeds from sale of equity interest	44.9
Business acquisitions, net of cash acquired		(0.3)
Other	(0.2)	1.9
Intercompany balances	0	0
Net cash used in investing activities	37.3	(20.6)
Cash flows from financing activities:
Net (payments) proceeds on long-term debt and financing fees	(0.2)	0.9
Common stock repurchases	0
Contingent earnout payments	(1.8)
Net redemptions of common stock under stock-based compensation plans	0	0
Other, principally intercompany balances	(63.6)	(21.1)
Net cash used in financing activities	(65.6)	(20.2)
Effect of exchange rate changes on cash	0	(3.4)
Increase (decrease) in cash and cash equivalents	41.5	(8.2)
Cash and cash equivalents, beginning of period	73.3	79.2
Cash and cash equivalents, end of period	114.8	71.0
Eliminating Entries
Condensed Financial Statements
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Additions to property and equipment	0
Lottery and gaming services expenditures	0
Lottery, gaming and other capital expenditures and intangible and software expenditures		0
Intangible assets and software expenditures	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
Intercompany balances	10.8	(15.6)
Net cash used in investing activities	10.8	(15.6)
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	0	0
Other, principally intercompany balances	(10.8)	15.6
Net cash used in financing activities	(10.8)	15.6
Effect of exchange rate changes on cash	0	0
Increase (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