Commitments and Contingencies - Additional Information (Details) customer in Millions, $ in Billions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Mar. 16, 2018 firm plantiff	Dec. 01, 2017 customer
Other Commitments [Line Items]
Unused credit available to accountholders | $		$ 3.1	$ 1.8
Number of customers with potentially compromised information | customer					1.6
Number of plaintiffs | plantiff				2
Number of law firms appointed as interim co-lead counsel | firm				2
eBay
Other Commitments [Line Items]
Stock distribution, percentage of common stock distributed	100.00%