Goodwill and Purchased Intangible Assets - Schedule of Goodwill (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Roll Forward]
Goodwill			$ 1,011
Accumulated Impairment Losses			(8)
Total	1,453	1,003	1,003
Additions	454
Impairment	0
Other	(4)
Goodwill	1,461		1,011
Accumulated Impairment Losses	(8)		(8)
Total	1,453	1,003	1,003
Financial Services [Member]
Goodwill [Roll Forward]
Goodwill			202
Accumulated Impairment Losses			0
Total	201		202
Additions	0
Impairment	0
Other	(1)
Goodwill	201		202
Accumulated Impairment Losses	0		0
Total	201		202
Retail Solutions [Member]
Goodwill [Roll Forward]
Goodwill			120
Accumulated Impairment Losses			(3)
Total	561		117
Additions	444
Impairment	0
Other	0
Goodwill	564		120
Accumulated Impairment Losses	(3)		(3)
Total	561		117
Hospitality and Specialty Retail [Member]
Goodwill [Roll Forward]
Goodwill			659
Accumulated Impairment Losses			0
Total	667		659
Additions	10
Impairment	0
Other	(2)
Goodwill	667		659
Accumulated Impairment Losses	0		0
Total	667		659
Entertainment [Member]
Goodwill [Roll Forward]
Goodwill			5
Accumulated Impairment Losses			(5)
Total	0		0
Additions	0
Impairment	0
Other	0
Goodwill	5		5
Accumulated Impairment Losses	(5)		(5)
Total	0		0
Emerging Industries [Member]
Goodwill [Roll Forward]
Goodwill			25
Accumulated Impairment Losses			0
Total	24		25
Additions	0
Impairment	0
Other	(1)
Goodwill	24		25
Accumulated Impairment Losses	0		0
Total	$ 24		$ 25