Segment and Related Information - Schedule of Operating Results by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenue	$ 3,084	$ 2,861	$ 9,345	$ 8,244
Operating Profit	1,074	853	3,130	4,228
Equity in Income on Unconsolidated Subsidiaries	8	6	33	21
Gain (loss) on dispositions	0	(2)	(69)	1,897
Amortization of intangibles from acquisitions	260	267	782	645
Lease impairment	3	73	14	98
Operating Segments
Segment Reporting Information [Line Items]
Operating Profit	1,153	1,022	3,479	5,059
Operating Segments | Market Intelligence
Segment Reporting Information [Line Items]
Revenue	1,099	1,016	3,249	2,774
Operating Profit	195	174	599	2,366
Employee severance charges	19	13	41	44
Acquisition-related costs		1		2
Asset impairment			5
Gain (loss) on dispositions		(17)	46	1,800
Amortization of intangibles from acquisitions	140	134	421	331
Operating Segments | Market Intelligence | IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	11	6	36	21
Asset write-off	1		1
Operating Segments | Ratings
Segment Reporting Information [Line Items]
Revenue	819	681	2,494	2,345
Operating Profit	459	377	1,422	1,352
Employee severance charges	2	2	8	14
Amortization of intangibles from acquisitions	2	2	6	5
Operating Segments | Commodity Insights
Segment Reporting Information [Line Items]
Revenue	479	432	1,450	1,234
Operating Profit	184	141	527	440
Employee severance charges	7	14	23	38
Amortization of intangibles from acquisitions	33	32	99	77
Operating Segments | Commodity Insights | IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	8	10	28	16
Operating Segments | Mobility
Segment Reporting Information [Line Items]
Revenue	379	346	1,107	797
Operating Profit	80	90	213	166
Employee severance charges	3	1	6	3
Acquisition-related costs	1		2
Amortization of intangibles from acquisitions	76	76	226	176
Acquisition-related benefit		19		15
Operating Segments | Mobility | IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	1		2	1
Operating Segments | Indices
Segment Reporting Information [Line Items]
Revenue	354	334	1,042	995
Operating Profit	235	239	699	732
Employee severance charges	1	1	4	4
Gain (loss) on dispositions		14	4	52
Amortization of intangibles from acquisitions	9	9	27	22
Operating Segments | Indices | IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	1	1	3	1
Operating Segments | Engineering Solutions
Segment Reporting Information [Line Items]
Revenue	0	95	133	224
Operating Profit	0	1	19	3
Employee severance charges		2		4
Amortization of intangibles from acquisitions		14	1	33
Intersegment Elimination
Segment Reporting Information [Line Items]
Revenue	(46)	(43)	(130)	(125)
Corporate Unallocated
Segment Reporting Information [Line Items]
Operating Profit	(87)	(175)	(382)	(852)
Equity in Income on Unconsolidated Subsidiaries	8	6	33	21
Employee severance charges	6	23	20	87
Acquisition-related costs	1	1	3	7
Asset write-off				3
Asset impairment		9		9
Gain (loss) on dispositions			(120)
Amortization of intangibles from acquisitions			2	1
Retention related expenses	3		19
Lease impairment			15	5
Gain on acquisition		10		10
S&P foundation grant				200
Amortization of intangibles from acquisitions	14	13	42	42
Corporate Unallocated | IHS Markit
Segment Reporting Information [Line Items]
Acquisition-related costs	$ 37	$ 127	$ 104	$ 483