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Divestitures, Investment Activities, and Goodwill - Schedule of Changes to Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Changes to goodwill
Goodwill, beginning balance	$ 2,566.6	$ 2,566.6
Additions	0.0	0.0
Goodwill, ending balance	2,566.6
Goodwill, ending balance	2,034.6	2,566.6
Consumer-to-Consumer
Changes to goodwill
Goodwill, beginning balance	1,980.7	1,980.7
Additions	0.0	0.0
Goodwill, ending balance	1,980.7
Goodwill, ending balance		1,980.7
Business Solutions
Changes to goodwill
Goodwill, beginning balance	532.0	532.0
Additions	0.0	0.0
Goodwill, ending balance	532.0
Goodwill, ending balance		532.0
Other
Changes to goodwill
Goodwill, beginning balance	53.9	53.9
Additions	0.0	0.0
Goodwill, ending balance	$ 53.9
Goodwill, ending balance		$ 53.9

X

- Definition

Amount after accumulated impairment loss 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

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-Publisher FASB
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- 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

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- Definition

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- Definition

Goodwill including assets held for sale.

+ References

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