Segment Information (Revenues From External Customers And Segment Operating Profit) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Income from operations	$ 696	$ 467	$ 1,365	$ 1,046
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income from operations	1,391	1,081	2,731	2,234
Operating Segments [Member] | Financial Services [Member]
Segment Reporting Information [Line Items]
Income from operations	439	365	845	746
Operating Segments [Member] | Healthcare Segment [Member]
Segment Reporting Information [Line Items]
Income from operations	388	305	799	626
Operating Segments [Member] | Products and Resources [Member]
Segment Reporting Information [Line Items]
Income from operations	329	237	637	498
Operating Segments [Member] | Communications, Media and Technology [Member]
Segment Reporting Information [Line Items]
Income from operations	235	174	450	364
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Unallocated costs	$ 695	$ 614	$ 1,366	$ 1,188