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Divestitures, Investment Activities, and Goodwill - Schedule of Changes to Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes to goodwill
Goodwill, beginning balance	$ 2,096.0	$ 2,566.6
Additions	0.0	0.0
Divestiture	(61.4)	(470.6)
Goodwill, ending balance	2,034.6	2,096.0
Consumer Money Transfer
Changes to goodwill
Goodwill, beginning balance	1,980.7	1,980.7
Additions	0.0	0.0
Divestiture	0.0	0.0
Goodwill, ending balance	1,980.7	1,980.7
Business Solutions
Changes to goodwill
Goodwill, beginning balance	61.4	532.0
Additions	0.0	0.0
Divestiture	(61.4)	(470.6)
Goodwill, ending balance	0.0	61.4
Consumer Services
Changes to goodwill
Goodwill, beginning balance	53.9	53.9
Additions	0.0	0.0
Divestiture	0.0	0.0
Goodwill, ending balance	$ 53.9	$ 53.9

X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482548/350-20-55-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
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-Section 50
-Paragraph 1
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-Publisher FASB
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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482548/350-20-55-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Goodwill including assets held for sale.

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