Selected Quarterly Financial Data (Unaudited) - Additional Information (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Effect of Fourth Quarter Events [Line Items]
Gain related to release of excess reserve for expansion of customer remediation programs resulting from cyber attack, net of tax			$ 18,100,000
Gain related to release of excess reserve for expansion of customer remediation programs resulting from cyber attack, net of tax, per diluted share (in usd per share)			$ 0.01
Loss on interest rate swaps			24,500,000
Loss on interest rate swaps, per diluted share			$ 0.01
Gain on strategic investment, net of tax			31,600,000
Gain on strategic investment, net of tax, per diluted share			$ 0.01
Special tax charges related to tax-related reorganizations									917,598,000	640,385,000	638,297,000
Special tax charges related to tax-related reorganizations, amount per diluted share	$ (0.39)	$ (0.28)	$ (0.29)	$ (0.27)	$ (0.38)	$ (0.27)	$ (0.24)	$ (0.21)	$ (1.23)	$ (1.10)	$ (0.88)
Charge related to expansion of customer remediation programs resulting from cyber attacks							56,200,000
Charge related to expansion of customer remediation programs resulting from cyber attacks, per diluted share							$ 0.03
Gain on sale of VMware's strategic investment							28,900,000
Gain on sale of VMware's strategic investment, per diluted share							$ 0.01
Tax-Related Reorganizations [Member]
Effect of Fourth Quarter Events [Line Items]
Special tax charges related to tax-related reorganizations	$ 11,500,000
Special tax charges related to tax-related reorganizations, amount per diluted share	$ 0.01