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Segment Information (Revenues From External Customers And Segment Operating Profit) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Income from operations | $ 738 | $ 686 | $ 2,141 | $ 1,965
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income from operations | 1,091 | 1,036 | 3,034 | 3,054
Operating Segments | Financial Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income from operations | 344 | 283 | 905 | 862
Operating Segments | Healthcare Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income from operations | 331 | 330 | 975 | 1,009
Operating Segments | Products and Resources |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income from operations | 258 | 256 | 717 | 719
Operating Segments | Communications, Media and Technology |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income from operations | 158 | 167 | 437 | 464
Corporate, Non-Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Unallocated costs | $ 353 | $ 350 | $ 893 | $ 1,089

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