Acquisitions and Divestitures (Details) - USD ($) $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of assets								$ 7.5	$ 30.2	$ 180.2
Gain (Loss) on Disposition of Assets								(11.5)	(7.6)	6.7
Payments to Acquire Businesses, Net of Cash Acquired								0.0	0.0	5.9
Payments for Repurchase of Redeemable Noncontrolling Interest								$ 0.0	$ 89.2	$ 345.2
Inspur (Suzhou) Financial Technology Service Co Ltd [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity Method Investment, Ownership Percentage	48.10%							48.10%	40.00%
Projective N.V. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses							$ 4.2
Gain (Loss) on Disposition of Assets							2.8
Venezuela Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Assets							(4.1)
Netherlands Entities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Assets							$ 3.5
SecurCash B.V. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses					$ 0.6
Gain (Loss) on Disposition of Assets						$ (1.1)
Eurasia Banking Entity [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Assets					(0.1)
Portavis GmbH [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses				$ 10.1
Gain (Loss) on Disposition of Business				$ 1.8
Cryptera A/S Denmark Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business			$ (5.9)
Italian ERP Retail Software Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 3.2
Gain (Loss) on Disposition of Business	1.9
Brazil Banking Software Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	7.9
Gain (Loss) on Disposition of Business	1.0
Impairment of assets		$ 4.1
Asia Pacific Business Held for Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of assets	$ 0.8
China Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses			26.8
Gain (Loss) on Disposition of Business			$ (8.6)
Kony Inc [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses					21.3
Gain (Loss) on Disposition of Assets					$ 7.3
Diebold Nixdorf AG China Subsidiaries [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments for Repurchase of Redeemable Noncontrolling Interest									$ 97.5