Segment Information (Revenues From External Customers And Segment Operating Profit) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Income from operations	$ 467	$ 619	$ 1,046	$ 1,158
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income from operations	1,081	1,160	2,234	2,305
Operating Segments [Member] | Financial Services [Member]
Segment Reporting Information [Line Items]
Income from operations	365	407	746	807
Operating Segments [Member] | Health Care [Member]
Segment Reporting Information [Line Items]
Income from operations	305	314		651
Operating Segments [Member] | Products and Resources [Member]
Segment Reporting Information [Line Items]
Income from operations	237	255	498	489
Operating Segments [Member] | Communications, Media and Technology [Member]
Segment Reporting Information [Line Items]
Income from operations	174	184	364	358
Operating Segments [Member] | Healthcare Segment [Member]
Segment Reporting Information [Line Items]
Income from operations			626
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Unallocated costs	$ 614	$ 541	$ 1,188	$ 1,147