Segment and Geographic Information - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 14,208	$ 12,497	$ 11,181
Depreciation & Amortization	1,173	1,143	1,013
Capital Expenditures	124	143	89
Total Assets	60,221	60,589
Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	2,986	2,093	1,807
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	11,222	10,404	9,374
Subscription
Disaggregation of Revenue [Line Items]
Total revenue	7,346	6,963	6,201
Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	2,986	2,093	1,807
Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	1,858	1,730	1,640
Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	1,046	859	862
Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	393	348	286
Recurring variable
Disaggregation of Revenue [Line Items]
Total revenue	579	504	385
Reportable Legal Entities
Disaggregation of Revenue [Line Items]
Total revenue	14,394	12,674	11,350
Reportable Legal Entities | Market Intelligence
Disaggregation of Revenue [Line Items]
Total revenue	4,645	4,376	3,811
Reportable Legal Entities | Market Intelligence | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	184	187	163
Reportable Legal Entities | Market Intelligence | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	4,461	4,189	3,648
Reportable Legal Entities | Market Intelligence | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	3,882	3,685	3,263
Reportable Legal Entities | Market Intelligence | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	184	187	163
Reportable Legal Entities | Market Intelligence | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Market Intelligence | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Market Intelligence | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Market Intelligence | Recurring variable
Disaggregation of Revenue [Line Items]
Total revenue	579	504	385
Reportable Legal Entities | Ratings
Disaggregation of Revenue [Line Items]
Total revenue	4,370	3,332	3,050
Reportable Legal Entities | Ratings | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	2,326	1,425	1,241
Reportable Legal Entities | Ratings | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	2,044	1,907	1,809
Reportable Legal Entities | Ratings | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Ratings | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	2,326	1,425	1,241
Reportable Legal Entities | Ratings | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	2,044	1,907	1,809
Reportable Legal Entities | Ratings | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Ratings | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Ratings | Recurring variable
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Commodity Insights
Disaggregation of Revenue [Line Items]
Total revenue	2,142	1,946	1,685
Reportable Legal Entities | Commodity Insights | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	166	158	126
Reportable Legal Entities | Commodity Insights | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	1,976	1,788	1,559
Reportable Legal Entities | Commodity Insights | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	1,873	1,707	1,492
Reportable Legal Entities | Commodity Insights | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	166	158	126
Reportable Legal Entities | Commodity Insights | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Commodity Insights | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Commodity Insights | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	103	81	67
Reportable Legal Entities | Commodity Insights | Recurring variable
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Mobility
Disaggregation of Revenue [Line Items]
Total revenue	1,609	1,484	1,142
Reportable Legal Entities | Mobility | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	310	315	254
Reportable Legal Entities | Mobility | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	1,299	1,169	888
Reportable Legal Entities | Mobility | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	1,299	1,169	888
Reportable Legal Entities | Mobility | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	310	315	254
Reportable Legal Entities | Mobility | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Mobility | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Mobility | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Mobility | Recurring variable
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Indices
Disaggregation of Revenue [Line Items]
Total revenue	1,628	1,403	1,339
Reportable Legal Entities | Indices | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Indices | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	1,628	1,403	1,339
Reportable Legal Entities | Indices | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	292	277	258
Reportable Legal Entities | Indices | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Indices | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Indices | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	1,046	859	862
Reportable Legal Entities | Indices | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	290	267	219
Reportable Legal Entities | Indices | Recurring variable
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Engineering Solutions
Disaggregation of Revenue [Line Items]
Total revenue	0	133	323
Reportable Legal Entities | Engineering Solutions | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	0	8	23
Reportable Legal Entities | Engineering Solutions | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	125	300
Reportable Legal Entities | Engineering Solutions | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	0	125	300
Reportable Legal Entities | Engineering Solutions | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	8	23
Reportable Legal Entities | Engineering Solutions | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Engineering Solutions | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Engineering Solutions | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Reportable Legal Entities | Engineering Solutions | Recurring variable
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	14,208	12,497	11,181
Depreciation & Amortization	1,160	1,129	992
Capital Expenditures	118	139	82
Total Assets	55,592	56,178
Operating Segments | Market Intelligence
Disaggregation of Revenue [Line Items]
Total revenue	4,633	4,365	3,797
Depreciation & Amortization	627	597	509
Capital Expenditures	61	73	43
Total Assets	29,478	29,674
Operating Segments | Ratings
Disaggregation of Revenue [Line Items]
Total revenue	4,207	3,177	2,906
Depreciation & Amortization	37	37	46
Capital Expenditures	29	24	23
Total Assets	1,056	1,041
Operating Segments | Commodity Insights
Disaggregation of Revenue [Line Items]
Depreciation & Amortization	137	137	115
Capital Expenditures	7	7	4
Total Assets	8,636	8,746
Operating Segments | Mobility
Disaggregation of Revenue [Line Items]
Depreciation & Amortization	317	314	248
Capital Expenditures	18	22	6
Total Assets	13,222	13,495
Operating Segments | Indices
Disaggregation of Revenue [Line Items]
Total revenue	1,617	1,392	1,328
Depreciation & Amortization	42	42	39
Capital Expenditures	3	13	2
Total Assets	3,200	3,222
Operating Segments | Engineering Solutions
Disaggregation of Revenue [Line Items]
Total revenue	0	133	323
Depreciation & Amortization	0	2	35
Capital Expenditures	0	0	4
Elimination
Disaggregation of Revenue [Line Items]
Total revenue	(186)	(177)	(169)
Elimination | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Elimination | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	(186)	(177)	(169)
Elimination | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Elimination | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Elimination | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	(186)	(177)	(169)
Elimination | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Elimination | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Elimination | Recurring variable
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Elimination | Market Intelligence
Disaggregation of Revenue [Line Items]
Total revenue	(12)	(11)	(14)
Elimination | Ratings
Disaggregation of Revenue [Line Items]
Total revenue	(163)	(155)	(144)
Elimination | Indices
Disaggregation of Revenue [Line Items]
Total revenue	(11)	(11)	(11)
Elimination | Engineering Solutions
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Corporate
Disaggregation of Revenue [Line Items]
Depreciation & Amortization	13	14	21
Capital Expenditures	6	4	$ 7
Total Assets	$ 4,629	$ 4,411