Nature of Business and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jul. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items]
Amount of off balance sheet settlement funds		$ 272,800,000	$ 246,800,000
Goodwill		1,280,226,000	1,280,226,000
Goodwill, impairment loss		0
Banks
Summary of Significant Accounting Policies [Line Items]
Goodwill		725,900,000
Merchants
Summary of Significant Accounting Policies [Line Items]
Goodwill		137,300,000
Billers
Summary of Significant Accounting Policies [Line Items]
Goodwill		$ 417,000,000
Level 2 | Senior Notes | 5.750% Senior Notes due 2026
Summary of Significant Accounting Policies [Line Items]
Stated interest rate (percentage)		5.75%
Fair value of long-term debt		$ 419,000,000	$ 424,500,000
India Payment Technology and Services Company
Summary of Significant Accounting Policies [Line Items]
Payments to acquire investment interest	$ 18,300,000
Percentage of voting interests acquired	30.00%
India Payment Technology and Services Company | Other Noncurrent Assets
Summary of Significant Accounting Policies [Line Items]
Equity method investment, carrying amount		$ 19,300,000
Software for resale | Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		5 years
Software for resale | Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		10 years
Software for internal use | Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		3 years
Software for internal use | Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		8 years
Other intangible assets | Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		4 years
Other intangible assets | Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		20 years