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Assets Held for Sale and Related Divestiture - Narrative (Details) $ in Millions			3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 01, 2023 USD ($)	Aug. 04, 2021 USD ($) Item	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Mar. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liability								$ 182.5
Gain on sale			$ 18.0		$ 18.0	$ 151.4
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		$ 910.0
Number of closings | Item		3
Revenues				$ 42.6	29.7	167.4
Operating expenses				27.0	26.1	117.4
Divestiture costs directly associated with transaction			$ 0.1	0.4	1.1	4.4
Liability								182.5
Other expense				$ 15.0	$ 2.7	$ 25.9
Business Solutions | Asset Held for Sale, Not Discontinued Operations | First Closing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unrealized currency translation gains							$ 17.8
Gain on sale							$ 151.4
Business Solutions | Asset Held for Sale, Not Discontinued Operations | Second Closing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale								96.9
Business Solutions | Asset Held for Sale, Not Discontinued Operations | Final Closing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale	$ 18.0
Business Solutions | Asset Held for Sale, Not Discontinued Operations | Other liabilities | First Closing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liability								$ 104.0

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