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Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | $ 3,535 | $ 2,989
Acquisitions | 50 | 565
Dispositions | (15) |
Reclassifications | 0 |
Other | 5 | (19)
Goodwill, ending balance | 3,575 | 3,535
Operating Segments |  |
Goodwill [Roll Forward] |  |
Reclassifications | 0 |
Operating Segments | Ratings |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 113 | 114
Acquisitions | 0 | 5
Dispositions | 0 |
Reclassifications | 0 |
Other | 2 | (6)
Goodwill, ending balance | 115 | 113
Operating Segments | Market Intelligence |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 2,029 | 1,961
Acquisitions | 44 | 62
Dispositions | (12) |
Reclassifications | 3 |
Other | (2) | 6
Goodwill, ending balance | 2,062 | 2,029
Operating Segments | Platts |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 516 | 523
Acquisitions | 6 | 0
Dispositions | (3) |
Other | 2 | (7)
Goodwill, ending balance | 521 | 516
Operating Segments | Indices |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 379 | 391
Acquisitions | 0 | 0
Dispositions | 0 |
Reclassifications | (3) |
Other | 0 | (12)
Goodwill, ending balance | 376 | 379
Corporate |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 498 | 0
Acquisitions | 0 | 498
Dispositions | 0 |
Reclassifications | 0 |
Other | 3 | 0
Goodwill, ending balance | $ 501 | $ 498

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