Segments - Segments Results (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Total consolidated revenues		$ 1,089.6	$ 1,286.3	$ 3,383.6	$ 3,786.0
Operating income:
Total operating income		231.8	318.6	733.3	806.3
Operating Segments
Operating income:
Total operating income		231.2	318.6	751.6	806.3
Operating Segments | Consumer-to-Consumer
Revenues:
Total consolidated revenues		982.4	1,104.5	3,008.3	3,282.5
Operating income:
Total operating income		193.7	268.2	626.5	708.1
Operating Segments | Business Solutions
Revenues:
Total consolidated revenues	[1]	42.6	116.8	167.4	312.6
Operating income:
Total operating income	[1]	15.9	38.4	51.7	61.9
Operating Segments | Other
Revenues:
Total consolidated revenues		64.6	65.0	207.9	190.9
Operating income:
Total operating income		21.6	$ 12.0	73.4	$ 36.3
Not Allocated To Segments | Russia/Belarus
Operating income:
Exit costs	[2]	$ 0.6		(10.6)
Not Allocated To Segments | Business Solutions
Operating income:
Exit costs	[2]			$ (7.7)

[1] On August 4, 2021, the Company entered into an agreement to sell its Business Solutions business to the Buyer. The sale will be completed in three closings, the first of which occurred on March 1, 2022. The second is expected to occur in December 2022, with the third expected in the first quarter of 2023. The operations of the Business Solutions business to be sold in the second and third closings continue to be included in Revenues and Operating income after the first closing. During the period between the first and third closings, the Company will pay to the Buyer a measure of profit of the European Union and United Kingdom operations, while owned by the Company, adjusted for the occupancy charges for employees of the Buyer using Company facilities and other items, as contractually agreed, and this expense is recognized in Other income/(expense), net in the Condensed Consolidated Statements of Income. The related income tax expense on this income is also passed to the Buyer.

[2] Represents the exit costs incurred in connection with the Company's suspension of its operations in Russia and Belarus and the divestiture of the Business Solutions business, primarily related to severance and non-cash impairments of property and equipment, an operating lease right-of-use asset, and other intangible assets. While certain of the expenses are identifiable to the Company's segments, the expenses are not included in the measurement of segment operating income provided to the CODM for purposes of performance assessment and resource allocation. These expenses are therefore excluded from the Company's segment operating income results.