Segment and Related Information - Revenue Disaggregated by Type (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 2,389	$ 2,016
Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	512	595
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	1,877	1,421
Subscription
Disaggregation of Revenue [Line Items]
Total revenue	1,125	781
Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	512	595
Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	425	400
Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	218	183
Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	69	57
Recurring variable revenue
Disaggregation of Revenue [Line Items]
Total revenue	40
Operating Segments | Ratings
Disaggregation of Revenue [Line Items]
Total revenue	868	1,017
Operating Segments | Ratings | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	404	582
Operating Segments | Ratings | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	464	435
Operating Segments | Ratings | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Ratings | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	404	582
Operating Segments | Ratings | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	464	435
Operating Segments | Ratings | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Ratings | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Ratings | Recurring variable revenue
Disaggregation of Revenue [Line Items]
Total revenue	0
Operating Segments | Market Intelligence
Disaggregation of Revenue [Line Items]
Total revenue	727	524
Operating Segments | Market Intelligence | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	28	12
Operating Segments | Market Intelligence | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	699	512
Operating Segments | Market Intelligence | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	659	512
Operating Segments | Market Intelligence | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	28	12
Operating Segments | Market Intelligence | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Market Intelligence | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Market Intelligence | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Market Intelligence | Recurring variable revenue
Disaggregation of Revenue [Line Items]
Total revenue	40
Operating Segments | Commodity Insights
Disaggregation of Revenue [Line Items]
Total revenue	363	240
Operating Segments | Commodity Insights | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	48	1
Operating Segments | Commodity Insights | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	315	239
Operating Segments | Commodity Insights | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	296	223
Operating Segments | Commodity Insights | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	48	1
Operating Segments | Commodity Insights | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Commodity Insights | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Commodity Insights | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	19	16
Operating Segments | Commodity Insights | Recurring variable revenue
Disaggregation of Revenue [Line Items]
Total revenue	0
Operating Segments | Mobility
Disaggregation of Revenue [Line Items]
Total revenue	115	0
Operating Segments | Mobility | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	29	0
Operating Segments | Mobility | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	86	0
Operating Segments | Mobility | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	86	0
Operating Segments | Mobility | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	29	0
Operating Segments | Mobility | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Mobility | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Mobility | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Mobility | Recurring variable revenue
Disaggregation of Revenue [Line Items]
Total revenue	0
Operating Segments | Indices
Disaggregation of Revenue [Line Items]
Total revenue	322	270
Operating Segments | Indices | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Indices | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	322	270
Operating Segments | Indices | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	54	46
Operating Segments | Indices | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Indices | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Indices | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	218	183
Operating Segments | Indices | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	50	41
Operating Segments | Indices | Recurring variable revenue
Disaggregation of Revenue [Line Items]
Total revenue	0
Operating Segments | Engineering Solutions
Disaggregation of Revenue [Line Items]
Total revenue	33	0
Operating Segments | Engineering Solutions | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	3	0
Operating Segments | Engineering Solutions | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	30	0
Operating Segments | Engineering Solutions | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	30	0
Operating Segments | Engineering Solutions | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	3	0
Operating Segments | Engineering Solutions | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Engineering Solutions | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Engineering Solutions | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | Engineering Solutions | Recurring variable revenue
Disaggregation of Revenue [Line Items]
Total revenue	0
Intersegment Elimination
Disaggregation of Revenue [Line Items]
Total revenue	(39)	(35)
Intersegment Elimination | Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Intersegment Elimination | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	(39)	(35)
Intersegment Elimination | Subscription
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Intersegment Elimination | Non-subscription / Transaction
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Intersegment Elimination | Non-transaction
Disaggregation of Revenue [Line Items]
Total revenue	(39)	(35)
Intersegment Elimination | Asset-linked fees
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Intersegment Elimination | Sales usage-based royalties
Disaggregation of Revenue [Line Items]
Total revenue	0	$ 0
Intersegment Elimination | Recurring variable revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 0