Quarterly Financial Data (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information [Line Items]
Total revenue	$ 1,263	$ 1,201	$ 1,198	$ 1,152	$ 1,145	$ 1,107	$ 1,087	$ 1,097	$ 4,814	$ 4,436	$ 4,289
Cost of processing and services	516	520	523	522	485	486	471	494	2,081	1,936	1,903
Cost of product	184	164	157	190	164	150	155	159	695	628	601
Selling, general and administrative expenses	266	237	245	229	209	206	204	205	977	824	795
Total expenses	966	921	925	941	858	842	830	858	3,753	3,388	3,299
Operating income	297	280	273	211	287	265	257	239	1,061	1,048	990
Income from continuing operations	220	161	152	117	158	140	162	132	650	592	487
Net income	221	159	151	117	179	139	161	132	648	611	472
Comprehensive income	$ 224	$ 163	$ 146	$ 115	$ 180	$ 151	$ 150	$ 148	$ 648	$ 629	$ 444
Net income per share - continuing operations basic	$ 0.85	$ 0.62	$ 0.57	$ 0.44	$ 0.59	$ 0.52	$ 0.59	$ 0.47	$ 2.48	$ 2.18	$ 1.71
Net income per share - continuing operations diluted	$ 0.84	$ 0.61	$ 0.57	$ 0.43	$ 0.58	$ 0.51	$ 0.59	$ 0.47	$ 2.44	$ 2.15	$ 1.69