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Segment Information (Revenues From External Customers And Segment Operating Profit) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 19,736 | $ 19,353 | $ 19,428
Income from operations | 2,892 | 2,689 | 2,968
Health Sciences |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 5,932 | 5,674 | 5,631
Financial Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 5,753 | 5,809 | 6,072
Products and Resources |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 4,782 | 4,628 | 4,566
Communications, Media and Technology |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 3,269 | 3,242 | 3,159
Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 19,736 | 19,353 | 19,428
Less: other segment items | 15,580 | 15,236 | 15,075
Income from operations | 4,156 | 4,117 | 4,353
Operating Segments [Member] | Health Sciences |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 5,932 | 5,674 | 5,631
Less: other segment items | 4,599 | 4,322 | 4,441
Income from operations | 1,333 | 1,352 | 1,190
Operating Segments [Member] | Financial Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 5,753 | 5,809 | 6,072
Less: other segment items | 4,512 | 4,653 | 4,749
Income from operations | 1,241 | 1,156 | 1,323
Operating Segments [Member] | Products and Resources |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 4,782 | 4,628 | 4,566
Less: other segment items | 3,802 | 3,644 | 3,495
Income from operations | 980 | 984 | 1,071
Operating Segments [Member] | Communications, Media and Technology |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 3,269 | 3,242 | 3,159
Less: other segment items | 2,667 | 2,617 | 2,390
Income from operations | 602 | 625 | 769
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Less: unallocated costs | $ 1,264 | $ 1,428 | $ 1,385

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