Summary of Significant Accounting Policies - Settlement Assets and Payables (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Settlement assets
Settlement deposits	$ 530	$ 1,181
Merchant float	2,273	2,071
Settlement receivables	1,217	662
Total Settlement assets	4,020	3,914
Settlement payables	$ 5,295	$ 4,934

Cash received or short term receivables for unsettled money transfers, money orders, consumer payments, or business to business payments. Settlement assets include clearing and settling customers payments due to and from financial institutions and may include cash and cash equivalents.

No definition available.

Name:	us-gaap_SettlementAssetsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant