Restructuring - Restructuring Charges By Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 28.2	$ 81.6	$ 50.2
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	15.4	75.8	50.1
Severance | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.5	24.7	25.1
Severance | Eurasia Banking Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	10.5	32.1	13.5
Severance | Americas Banking Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	3.2	2.5	1.8
Severance | Retail Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1.2	16.5	9.7
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	12.8	5.8	0.1
Other Restructuring | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	10.6	1.6	0.0
Other Restructuring | Eurasia Banking Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.6	2.0	0.0
Other Restructuring | Americas Banking Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.0	0.0	0.1
Other Restructuring | Retail Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 1.6	$ 2.2	$ 0.0