Segment and Related Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total assets	$ 59,889	$ 60,221
Operating Segments
Segment Reporting Information [Line Items]
Total assets	55,480	55,592
Operating Segments | Market Intelligence
Segment Reporting Information [Line Items]
Total assets	29,035	29,478
Operating Segments | Ratings
Segment Reporting Information [Line Items]
Total assets	1,234	1,056
Operating Segments | Commodity Insights Segment
Segment Reporting Information [Line Items]
Total assets	8,753	8,636
Operating Segments | Mobility Segment
Segment Reporting Information [Line Items]
Total assets	13,161	13,222
Operating Segments | Indices
Segment Reporting Information [Line Items]
Total assets	3,297	3,200
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 4,409	$ 4,629