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Equity - Schedule of Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Jan. 23, 2020
Jan. 22, 2020
Mar. 31, 2021
Mar. 31, 2020
Class of Stock [Line Items]        
Gross proceeds     $ 0 $ 1,220
Net proceeds $ 768      
Equity Component        
Class of Stock [Line Items]        
Price per share (usd per share)   $ 42.80    
Gross proceeds   $ 471    
Less: Issuance costs   19    
Net proceeds   $ 452    
Debt Component        
Class of Stock [Line Items]        
Price per share (usd per share)   $ 7.20    
Gross proceeds   $ 79    
Less: Issuance costs   3    
Net proceeds   $ 76    
Tangible Equity Unit (TEU)        
Class of Stock [Line Items]        
Price per share (usd per share)   $ 50.00    
Gross proceeds   $ 550    
Less: Issuance costs   22    
Net proceeds   $ 528    
Tangible Equity Unit (TEU) | Minimum        
Class of Stock [Line Items]        
Applicable Market Value (usd per share)   $ 32.00    
Settlement rate   130.21%    
Tangible Equity Unit (TEU) | Maximum        
Class of Stock [Line Items]        
Applicable Market Value (usd per share)   $ 38.40    
Settlement rate   156.25%