Restructuring - Schedule of Initial Restructuring Charge Recorded and the Ending Reserve Balance (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	$ 186
Ending Reserve Balance	103
2022 Restructuring Plan | Operating Segments | Market Intelligence
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	39
Ending Reserve Balance	20
2022 Restructuring Plan | Operating Segments | Ratings
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	14
Ending Reserve Balance	9
2022 Restructuring Plan | Operating Segments | Commodity Insights
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	37
Ending Reserve Balance	26
2022 Restructuring Plan | Operating Segments | Mobility
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	2
Ending Reserve Balance	1
2022 Restructuring Plan | Operating Segments | Indices
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	4
Ending Reserve Balance	2
2022 Restructuring Plan | Operating Segments | Engineering Solutions
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	1
Ending Reserve Balance	1
2022 Restructuring Plan | Corporate
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	89
Ending Reserve Balance	44
2021 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	19
Ending Reserve Balance	13	$ 19
2021 Restructuring Plan | Operating Segments | Market Intelligence
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	3
Ending Reserve Balance	3
2021 Restructuring Plan | Operating Segments | Ratings
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	3
Ending Reserve Balance	2
2021 Restructuring Plan | Operating Segments | Commodity Insights
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	0
Ending Reserve Balance	0
2021 Restructuring Plan | Operating Segments | Mobility
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	0
Ending Reserve Balance	0
2021 Restructuring Plan | Operating Segments | Indices
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	0
Ending Reserve Balance	0
2021 Restructuring Plan | Operating Segments | Engineering Solutions
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	0
Ending Reserve Balance	0
2021 Restructuring Plan | Corporate
Restructuring Cost and Reserve [Line Items]
Initial Charge Recorded	13
Ending Reserve Balance	$ 8