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Restructuring (Tables)
 6 Months Ended
Jun. 30, 2021
Restructuring and Related Activities [Abstract]  
Schedule of Initial Restructuring Charge Recorded and the Ending Reserve Balance The initial restructuring charge recorded and the ending reserve balance as of June 30, 2021 by segment is as follows:
2020 Restructuring Plan
(in millions)Initial Charge RecordedEnding Reserve Balance
Ratings$4 $2 
Market Intelligence27 10 
Platts10 6 
Indices5 1 
Corporate 19 9 
Total $65 $28