Segment and Related Information - Schedule of Operating Results by Segment (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenue	$ 3,491	$ 3,160
Operating Profit	1,385	1,144
Equity in Income on Unconsolidated Subsidiaries	6	14
Gain (loss) on dispositions	0	50
Amortization of intangibles from acquisitions	264	262
Operating Segments
Segment Reporting Information [Line Items]
Operating Profit	1,436	1,209
Operating Segments \| Market Intelligence
Segment Reporting Information [Line Items]
Revenue	1,142	1,071
Operating Profit	189	229
Employee severance charges	31
Acquisition-related costs	3	13
Gain (loss) on dispositions		46
Amortization of intangibles from acquisitions	140	141
Operating Segments \| Market Intelligence \| IHS Markit
Segment Reporting Information [Line Items]
Employee severance charges		6
Acquisition-related costs	11
Operating Segments \| Ratings
Segment Reporting Information [Line Items]
Revenue	1,062	824
Operating Profit	679	477
Employee severance charges	2	1
Amortization of intangibles from acquisitions	7	2
Operating Segments \| Commodity Insights
Segment Reporting Information [Line Items]
Revenue	559	508
Operating Profit	226	187
Employee severance charges		2
Amortization of intangibles from acquisitions	32	33
Operating Segments \| Commodity Insights \| IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	5	13
Operating Segments \| Mobility
Segment Reporting Information [Line Items]
Revenue	386	358
Operating Profit	70	64
Acquisition-related costs		1
Amortization of intangibles from acquisitions	76	74
Operating Segments \| Mobility \| IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	1	1
Operating Segments \| Indices
Segment Reporting Information [Line Items]
Revenue	387	341
Operating Profit	272	238
Employee severance charges	1	1
Gain (loss) on dispositions		4
Amortization of intangibles from acquisitions	9	9
Operating Segments \| Indices \| IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	1	1
Operating Segments \| Engineering Solutions
Segment Reporting Information [Line Items]
Revenue	0	100
Operating Profit	0	14
Amortization of intangibles from acquisitions		2
Intersegment Elimination
Segment Reporting Information [Line Items]
Revenue	(45)	(42)
Corporate Unallocated
Segment Reporting Information [Line Items]
Operating Profit	(57)	(79)
Equity in Income on Unconsolidated Subsidiaries	6	14
Employee severance charges	2	1
Acquisition-related costs	1	1
Amortization of intangibles from acquisitions		1
Retention related expenses		13
Amortization of intangibles from acquisitions	14	14
Corporate Unallocated \| IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	18	$ 37
Recovery of lease-related costs	$ 1

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