Business Combination - Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended			9 Months Ended		9 Months Ended		9 Months Ended		9 Months Ended		9 Months Ended		1 Months Ended			1 Months Ended			1 Months Ended			1 Months Ended			1 Months Ended			1 Months Ended
	Sep. 30, 2011	Aug. 24, 2011	Dec. 31, 2010	Sep. 30, 2011 Financial Services [Member]	Dec. 31, 2010 Financial Services [Member]	Sep. 30, 2011 Retail Solutions [Member]	Dec. 31, 2010 Retail Solutions [Member]	Sep. 30, 2011 Hospitality and Special Retail [Member]	Dec. 31, 2010 Hospitality and Special Retail [Member]	Sep. 30, 2011 Entertainment [Member]	Dec. 31, 2010 Entertainment [Member]	Sep. 30, 2011 Emerging Industries [Member]	Dec. 31, 2010 Emerging Industries [Member]	Sep. 30, 2011 Reseller Network [Member] Years		Aug. 24, 2011 Reseller Network [Member]	Sep. 30, 2011 Technology Software and Hardware [Member] Years		Aug. 24, 2011 Technology Software and Hardware [Member]	Sep. 30, 2011 Trademarks [Member] Years		Aug. 24, 2011 Trademarks [Member]	Sep. 30, 2011 Direct Customer Relationships [Member] Years		Aug. 24, 2011 Direct Customer Relationships [Member]	Sep. 30, 2011 Noncompete Agreements [Member] Years		Aug. 24, 2011 Noncompete Agreements [Member]	Sep. 30, 2011 Internally Developed Software [Member] Years		Aug. 24, 2011 Internally Developed Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 918		$ 115	$ 153	$ 67	$ 117	$ 18	$ 618	$ 0	$ 5	$ 5	$ 25	$ 25
Goodwill, Acquired During Period	803			86		99		618		0		0
Goodwill, Other Changes	0			0		0		0		0		0
Goodwill, Gross	921		118	153	67	120	21	618	0	5	5	25	25
Goodwill, Impaired, Accumulated Impairment Loss	(3)		(3)	0	0	(3)	(3)	0	0	0	0	0	0
Acquired Finite-lived Intangible Asset, Estimated Fair Value		$ 319														$ 88			$ 106			$ 48			$ 74			$ 2			$ 1
Acquired Finite-lived Intangible Asset, Weighted Average Amortization Period														13	[1]		6	[1]		9	[1]		15	[1]		2	[1]		2	[1]

[1] Determination of the weighted average amortization period of the individual categories of intangible assets was based on the nature of the applicable intangible asset and the expected future cash flows to be derived from the intangible asset. Amortization of intangible assets with definite lives is recognized over the period of time the assets are expected to contribute to future cash flows.