Restructuring Charges (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (7.2)	$ (13.0)	$ 0.0
2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	23.2	$ 24.1
Restructuring (reversal of cost)	(0.6)
Restructuring and Related Cost, Expected Cost Remaining	11.5
Restructuring charges	(5.6)
Payments for Restructuring	6.5
Restructuring and Related Cost, Expected Number of Positions Eliminated		300
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent		3.00%
Other Costs related to repositioning actions	7.5
Severance Costs	6.2
Restructuring and Related Cost, Expected Cost	30.0
2017Repositioning [Member] | Payment and Merchandising Technologies [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	9.4	$ 12.2
Restructuring and Related Cost, Expected Cost Remaining	1.3
Restructuring charges	(0.5)
Payments for Restructuring	3.3
2017Repositioning [Member] | Aerospace And Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.9	1.3
Restructuring (reversal of cost)	(1.0)
Restructuring and Related Cost, Expected Cost Remaining	3.0
Payments for Restructuring	(0.6)
2017Repositioning [Member] | Fluid Handling [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	12.9	10.6
Other Restructuring Costs	0.0
Restructuring and Related Cost, Expected Cost Remaining	7.2
Restructuring charges	(6.1)
Payments for Restructuring	$ 3.8
Crane Currency [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated	170
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent	2.00%
Other Costs related to repositioning actions	$ 3.8
Severance Costs	1.6
Restructuring and Related Cost, Expected Cost		23.0
Facility Closing [Member] | 2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Facility Consolidation Costs	9.4
Employee Severance [Member] | 2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	2.1
Employee Severance [Member] | 2017Repositioning [Member] | Payment and Merchandising Technologies [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	9.4	12.2
Restructuring charges	(0.1)
Payments for Restructuring	2.9
Employee Severance [Member] | 2017Repositioning [Member] | Aerospace And Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.9	1.3
Restructuring charges	0.0
Payments for Restructuring	0.4
Employee Severance [Member] | 2017Repositioning [Member] | Fluid Handling [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	12.9	10.6
Restructuring charges	(6.1)
Payments for Restructuring	3.8
Other Restructuring [Member] | 2017Repositioning [Member] | Payment and Merchandising Technologies [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0	0.0
Restructuring charges	(0.4)
Payments for Restructuring	0.4
Other Restructuring [Member] | 2017Repositioning [Member] | Aerospace And Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0	0.0
Restructuring (reversal of cost)	(1.0)
Payments for Restructuring	(1.0)
Other Restructuring [Member] | 2017Repositioning [Member] | Fluid Handling [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0	$ 0.0
Restructuring charges	0.0
Payments for Restructuring	0.0
ExpectedRestructuringCostsin2020[Member] [Member] | 2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	1.6
ExpectedRestructuringCostsin2020[Member] [Member] | 2017Repositioning [Member] | Payment and Merchandising Technologies [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	0.0
ExpectedRestructuringCostsin2020[Member] [Member] | 2017Repositioning [Member] | Aerospace And Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	0.0
ExpectedRestructuringCostsin2020[Member] [Member] | 2017Repositioning [Member] | Fluid Handling [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	1.6
ExpectedRestructuringCostsin2020[Member] [Member] | Facility Closing [Member] | 2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Facility Consolidation Costs	1.6
ExpectedRestructuringCostsin2020[Member] [Member] | Employee Severance [Member] | 2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	0.0
ExpectedRestructuringCostsin2019 [Member] [Member] | 2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	9.9
ExpectedRestructuringCostsin2019 [Member] [Member] | 2017Repositioning [Member] | Payment and Merchandising Technologies [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	1.3
ExpectedRestructuringCostsin2019 [Member] [Member] | 2017Repositioning [Member] | Aerospace And Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	3.0
ExpectedRestructuringCostsin2019 [Member] [Member] | 2017Repositioning [Member] | Fluid Handling [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	5.6
ExpectedRestructuringCostsin2019 [Member] [Member] | Facility Closing [Member] | 2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Facility Consolidation Costs	7.8
ExpectedRestructuringCostsin2019 [Member] [Member] | Employee Severance [Member] | 2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Netgainonrestructuring	$ 2.1