Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 1,173.2	$ 1,214.5	$ 1,271.3
Accumulated impairment losses	(470.9)	(470.9)	(470.9)
Beginning balance	743.6	800.4
Goodwill, Written off Related to Sale of Business Unit		(3.3)
Currency translation adjustment	(29.6)	(53.5)
Ending balance	702.3	743.6
Impairment		0.0
Pre-Segment Change
Goodwill [Line Items]
Goodwill	1,202.8
Currency translation adjustment	(11.7)
Eurasia Banking Segment [Member]
Goodwill [Line Items]
Goodwill	555.1	561.4	590.4
Accumulated impairment losses	(291.7)	(291.7)	(291.7)
Beginning balance	269.7	298.7
Goodwill, Written off Related to Sale of Business Unit		0.0
Transferred to assets held for sale	555.1
Currency translation adjustment	(6.3)	(29.0)
Ending balance	0.0	269.7
Impairment		0.0
Americas Banking Segment [Member]
Goodwill [Line Items]
Goodwill	439.1	440.1	444.7
Accumulated impairment losses	(122.0)	(122.0)	(122.0)
Beginning balance	318.1	322.7
Goodwill, Written off Related to Sale of Business Unit		0.0
Transferred to assets held for sale	439.1
Currency translation adjustment	(1.0)	(4.6)
Ending balance	0.0	318.1
Impairment		0.0
Retail Segment [Member]
Goodwill [Line Items]
Goodwill	269.6	213.0	236.2
Accumulated impairment losses	(57.2)	(57.2)	$ (57.2)
Beginning balance	155.8	179.0
Goodwill, Written off Related to Sale of Business Unit		(3.3)
Transferred to assets held for sale	(72.0)
Currency translation adjustment	(11.0)	(19.9)
Ending balance	212.4	155.8
Impairment		0.0
Retail Segment [Member] | Pre-Segment Change
Goodwill [Line Items]
Goodwill	208.6
Currency translation adjustment	(4.4)
Banking Segment
Goodwill [Line Items]
Goodwill	903.6
Accumulated impairment losses	413.7
Beginning balance	489.9
Transferred to assets held for sale	(922.2)
Currency translation adjustment	$ (18.6)
Ending balance		$ 489.9