Loans and Interest Receivable - Merchant Receivables (Details) - Merchant Receivables - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan and interest receivables	$ 2,389	$ 1,874
Participation interest sold, value	$ 106	$ 84
Threshold period, write-off of receivables	180 days
Threshold period, write-off of bankrupt accounts	60 days
PayPal Working Capital Products
Accounts, Notes, Loans and Financing Receivable [Line Items]
Period pas expected period of repayment	180 days
Threshold period, write-off of receivables, nonpayment	60 days
Threshold period two, write-off of receivables	360 days
PayPal Working Capital Products | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Required percentage of original loan payments every 90 days	10.00%
Expected period of repayment	9 months
PayPal Working Capital Products | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Expected period of repayment	12 months
PayPal Business Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period, write-off of receivables	180 days
PayPal Business Loans | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Expected period of repayment	3 months
PayPal Business Loans | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Expected period of repayment	12 months