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Divestitures, Investment Activities, and Goodwill - Narrative (Details)			1 Months Ended		12 Months Ended
	Aug. 04, 2021 USD ($) Item	May 09, 2019 USD ($)	Oct. 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale							$ 524,600,000
Proceeds from shares sold					$ 50,900,000
Gain on sale of minority investment					47,900,000
Goodwill					2,034,600,000	$ 2,566,600,000	2,566,600,000
Goodwill impairment					0	0	0
Commercial Agreement | Certain Rights | Other Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment value					36,000,000.0
Private Company
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from shares sold				$ 50,900,000
Gain on sale of minority investment					47,900,000
Saudi Digital Payments Company
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment in Saudi Digital Payments Company			$ 200,000,000.0
Ownership (as a percent)			15.00%
Divestitures | Speedpay
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration from sale of business		$ 750,000,000
Divestitures | Speedpay | Other services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues							125,400,000
Operating expenses							98,200,000
Gain on sale		$ 523,000,000
Business Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill						532,000,000.0	532,000,000.0
Business Solutions | Asset Held for Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration from sale of business	$ 910,000,000
Number of closings | Item	2
Termination fee	$ 63,700,000
Revenues					421,800,000	356,100,000	388,800,000
Operating expenses					317,700,000	$ 319,500,000	$ 334,100,000
Operating costs directly associated with divestiture					14,400,000
Unrealized currency translation gains					$ 17,800,000

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