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Stock-Based and Employee Savings Plans - Employee Stock Purchase Plan (Details) - PayPal Holdings, Inc. Employee Stock Purchase Plan - $ / shares
1 Months Ended 12 Months Ended
May 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Additional shares authorized (in shares) 50,000,000      
Maximum duration of common stock purchasing period   2 years    
Purchase price of common stock, percent of fair market value   85.00%    
Purchase period   6 months    
Purchased number of shares under the employee stock purchase plan (in shares)   1,800,000 2,400,000 2,700,000
Average price of shares purchased under the employee stock purchase plan (in usd per share)   $ 66.36 $ 43.09 $ 34.06
Number of shares available for grant (in shares)   51,000,000    
Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee subscription rate   2.00%    
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee subscription rate   10.00%