Unaudited Net Earnings per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Earnings Per Share [Abstract]
Earnings from continuing operations attributable to FIS, net of tax	$ 175.6		$ 147.8		$ 414.8		$ 395.1
Earnings (loss) from discontinued operations attributable to FIS, net of tax	(3.3)		(61.0)		6.4		(70.6)
Net earnings attributable to FIS	$ 172.3		$ 86.8		$ 421.2		$ 324.5
Weighted average shares outstanding — basic	289.2		292.4		290.0		291.6
Plus: Common stock equivalent shares	4.0		5.5		4.3		5.6
Weighted average shares outstanding — diluted	293.2		297.9		294.3		297.2
Net earnings per share — basic from continuing operations attributable to FIS common stockholders	$ 0.61		$ 0.51		$ 1.43		$ 1.35
Net earnings (loss) per share — basic from discontinued operations attributable to FIS common stockholders	$ (0.01)		$ (0.21)		$ 0.02		$ (0.24)
Net earnings per share — basic attributable to FIS common stockholders	$ 0.60	[1]	$ 0.30	[1]	$ 1.45	[1]	$ 1.11	[1]
Net earnings per share — diluted from continuing operations attributable to FIS common stockholders	$ 0.60		$ 0.50		$ 1.41		$ 1.33
Net earnings (loss) per share — diluted from discontinued operations attributable to FIS common stockholders	$ (0.01)		$ (0.20)		$ 0.02		$ (0.24)
Net earnings per share — diluted attributable to FIS common stockholders	$ 0.59	[1]	$ 0.29	[1]	$ 1.43	[1]	$ 1.09	[1]

[1] * Amounts may not sum due to rounding.