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Acquisitions and Divestitures - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended
Jan. 14, 2023
Feb. 28, 2022
Mar. 31, 2023
Mar. 31, 2022
Business Acquisition [Line Items]        
Pre-tax gain (loss) on sale     $ 50,000,000 $ 1,344,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | LCD        
Business Acquisition [Line Items]        
Pre-tax gain (loss) on sale     $ 50,000,000  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | LCD | Market Intelligence        
Business Acquisition [Line Items]        
Contingent consideration, Payment due following closing, period     6 months  
Pre-tax gain (loss) on sale     $ 46,000,000  
Gain (loss) on disposition after tax     34,000,000  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | LCD | Indices        
Business Acquisition [Line Items]        
Pre-tax gain (loss) on sale     4,000,000  
Gain (loss) on disposition after tax     $ 3,000,000  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | CUSIP Global Services        
Business Acquisition [Line Items]        
Pre-tax gain (loss) on sale       1,344,000,000
Gain (loss) on disposition after tax       999,000,000
Divestiture consideration       $ 1,925,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | OPIS        
Business Acquisition [Line Items]        
Pre-tax gain (loss) on sale   $ 0    
Divestiture consideration   1,150,000,000    
Disposal Group, Held-for-sale, Not Discontinued Operations | Engineering Solutions Segment        
Business Acquisition [Line Items]        
Divestiture consideration $ 975,000,000      
Disposal Group, Held-for-sale, Not Discontinued Operations | Engineering Solutions Business        
Business Acquisition [Line Items]        
Proceeds from divestiture of business $ 750,000,000      
IHS Markit        
Business Acquisition [Line Items]        
Fair value of S&P Global common stock and replacement equity awards   $ 43,500,000,000