Segment Information - (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Document Period End Date		Mar. 31, 2020
Summary of Segment Information
Intersegment revenue		$ 910.7	$ 1,028.1
Segment gross profit		226.8	246.1
Segment selling and administrative expense		222.1	230.3
Segment research, development and engineering expense		32.5	36.9
Segment operating profit (loss)		(26.0)	(24.5)
Restructuring and DN Now transformation expenses		(10.0)	(3.8)
Other expense		(47.4)	(46.6)
Income (loss) from continuing operations before taxes		(73.4)	(71.1)
Eurasia Banking
Summary of Segment Information
Intersegment revenue		310.5	382.6
Americas Banking
Summary of Segment Information
Intersegment revenue		344.7	362.7
Retail
Summary of Segment Information
Intersegment revenue		255.5	282.8
Operating Segments [Member]
Summary of Segment Information
Revenue from Related Parties		22.7	57.4
Segment gross profit		254.2	247.0
Segment selling and administrative expense		122.5	150.0
Segment research, development and engineering expense		31.0	36.7
Segment operating profit (loss)		100.7	60.3
Operating Segments [Member] | Eurasia Banking
Summary of Segment Information
Intersegment revenue		310.5	382.6
Revenue from Related Parties		21.4	55.2
Segment gross profit		89.8	109.0
Segment selling and administrative expense		46.1	61.9
Segment research, development and engineering expense		12.0	13.4
Segment operating profit (loss)		31.7	33.7
Operating Segments [Member] | Americas Banking
Summary of Segment Information
Intersegment revenue		344.7	362.7
Revenue from Related Parties		1.3	2.2
Segment gross profit		104.5	82.2
Segment selling and administrative expense		39.7	50.3
Segment research, development and engineering expense		11.1	13.4
Segment operating profit (loss)		53.7	18.5
Operating Segments [Member] | Retail
Summary of Segment Information
Intersegment revenue		255.5	282.8
Segment gross profit		59.9	55.8
Segment selling and administrative expense		36.7	37.8
Segment research, development and engineering expense		7.9	9.9
Segment operating profit (loss)		15.3	8.1
Corporate and Reconciling Items [Member]
Summary of Segment Information
Reconciliation Of Operating Profit Loss From Segments To Consolidated, Amount		(126.7)	(84.8)
Corporate
Summary of Segment Information
Segment operating profit (loss)	[1]	(37.7)	(33.2)
Segment Reconciling Items [Member]
Summary of Segment Information
Restructuring and DN Now transformation expenses		(41.6)	(15.2)
Net non-routine expense		$ (47.4)	$ (36.4)

[1] Corporate charges not allocated to segments include headquarter-based costs associated with procurement, human resources, compensation and benefits, finance and accounting, global development/engineering, global strategy/mergers and acquisitions, global IT, tax, treasury and legal.