Funds Receivable and Customer Accounts and Investments - Estimated Fair Values of Investments Classified as Available for Sale Included within Funds Receivable and Customer Accounts by Date of Contractual Maturity (Details) $ in Millions	Dec. 31, 2019 USD ($)
Amortized Cost
One year or less	$ 9,966
After one year through five years	2,041
After five years through ten years	4
Total	12,011
Fair Value
One year or less	9,966
After one year through five years	2,043
After five years through ten years	4
Total	$ 12,013