Segment Information (Revenues From External Customers And Segment Operating Profit) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]
Revenues	$ 2,581,009		$ 2,305,723		$ 7,520,451		$ 6,487,701
Income from operations	457,513		437,359		1,405,470		1,230,069
Stock-based compensation expense					100,622		86,353
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	2,581,009		2,305,723		7,520,451		6,487,701
Income from operations	784,274		818,629		2,480,622		2,212,385
Operating Segments [Member] | Financial Services [Member]
Segment Reporting Information [Line Items]
Revenues	1,082,245		954,379		3,164,467		2,720,427
Income from operations	318,022		324,450		1,019,986		895,079
Operating Segments [Member] | Healthcare [Member]
Segment Reporting Information [Line Items]
Revenues	655,415		599,947		1,916,770		1,651,540
Income from operations	200,804		230,145		642,399		612,210
Operating Segments [Member] | Manufacturing/Retail/Logistics [Member]
Segment Reporting Information [Line Items]
Revenues	533,048		490,622		1,559,288		1,378,062
Income from operations	168,686		177,075		527,786		466,485
Operating Segments [Member] | Other Business Segments [Member]
Segment Reporting Information [Line Items]
Revenues	310,301		260,775		879,926		737,672
Income from operations	96,762		86,959		290,451		238,611
Unallocated [Member]
Segment Reporting Information [Line Items]
Less: unallocated costs	326,761	[1]	381,270	[1]	1,075,152	[1]	982,316
Stock-based compensation expense	$ 31,271		$ 27,023		$ 100,622		$ 86,353

[1] Includes $31,271 and $27,023 of stock-based compensation expense for the three months ended September 30, 2014 and 2013, respectively, and $100,622 and $86,353 of stock-based compensation expense for the nine months ended September 30, 2014 and 2013, respectively. In addition, the unallocated costs for the three and nine months ended September 30, 2014 include the benefit of accruing incentive-based compensation at lower accrual rates than the comparable 2013 periods.