Loans and Interest Receivable - Schedule of Delinquency Status of the Principal Amount of Consumer Loans and Interest Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Consumer Receivables
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, current	$ 1,242	$ 668
Loans, advances, and interest receivable, past due	80	36
Loans, advances, and interest receivable	$ 1,322	$ 704
Loans, advances, and interest receivable, current, percentage	93.90%	94.90%
Loans, advances, and interest receivable, past due, percentage	6.10%	5.10%
Loans, advances, and interest receivable, percentage	100.00%	100.00%
Consumer Receivables | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, past due	$ 37	$ 18
Loans, advances, and interest receivable, past due, percentage	2.80%	2.50%
Consumer Receivables | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, past due	$ 15	$ 6
Loans, advances, and interest receivable, past due, percentage	1.10%	0.90%
Consumer Receivables | 90 - 180 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, past due	$ 28	$ 12
Loans, advances, and interest receivable, past due, percentage	2.20%	1.70%
Merchant Receivables
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, current	$ 2,523	$ 1,706
Loans, advances, and interest receivable, past due	293	168
Loans, advances, and interest receivable	$ 2,816	$ 1,874
Loans, advances, and interest receivable, current, percentage	89.60%	91.00%
Loans, advances, and interest receivable, past due, percentage	10.40%	9.00%
Loans, advances, and interest receivable, percentage	100.00%	100.00%
Merchant Receivables | iZettle
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable		$ 30
Merchant Receivables | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, past due	$ 115	$ 66
Loans, advances, and interest receivable, past due, percentage	4.10%	3.60%
Merchant Receivables | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, past due	$ 61	$ 32
Loans, advances, and interest receivable, past due, percentage	2.10%	1.70%
Merchant Receivables | 90 - 180 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, past due	$ 100	$ 57
Loans, advances, and interest receivable, past due, percentage	3.60%	3.00%
Merchant Receivables | 180 Plus Days
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest receivable, past due	$ 17	$ 13
Loans, advances, and interest receivable, past due, percentage	0.60%	0.70%