Restructuring - Schedule of Initial Restructuring Charge Recorded and the Ending Reserve Balance (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	$ 183
Ending Reserve Balance	152
2023 Restructuring Plan | Operating segments | Market Intelligence
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	90
Ending Reserve Balance	78
2023 Restructuring Plan | Operating segments | Ratings
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	10
Ending Reserve Balance	9
2023 Restructuring Plan | Operating segments | Commodity Insights
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	26
Ending Reserve Balance	18
2023 Restructuring Plan | Operating segments | Mobility
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	9
Ending Reserve Balance	8
2023 Restructuring Plan | Operating segments | Indices
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	5
Ending Reserve Balance	4
2023 Restructuring Plan | Operating segments | Engineering Solutions
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	0
Ending Reserve Balance	0
2023 Restructuring Plan | Corporate
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	43
Ending Reserve Balance	35
2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	283
Ending Reserve Balance	21
2022 Restructuring Plan | Operating segments | Market Intelligence
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	86
Ending Reserve Balance	10
2022 Restructuring Plan | Operating segments | Ratings
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	26
Ending Reserve Balance	3
2022 Restructuring Plan | Operating segments | Commodity Insights
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	45
Ending Reserve Balance	1
2022 Restructuring Plan | Operating segments | Mobility
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	2
Ending Reserve Balance	0
2022 Restructuring Plan | Operating segments | Indices
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	13
Ending Reserve Balance	1
2022 Restructuring Plan | Operating segments | Engineering Solutions
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	2
Ending Reserve Balance	0
2022 Restructuring Plan | Corporate
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	109
Ending Reserve Balance	$ 6