Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 796.4	$ 644.3	$ 1,575.9	$ 1,391.1
Process Flow Technologies
Disaggregation of Revenue [Line Items]
Net sales	310.7	239.3	598.8	495.9
Process Flow Technologies | Process Valves and Related Products
Disaggregation of Revenue [Line Items]
Net sales	184.3	160.8	358.6	317.9
Process Flow Technologies | Commercial Valves
Disaggregation of Revenue [Line Items]
Net sales	98.2	58.3	187.7	134.1
Process Flow Technologies | Pumps and Systems
Disaggregation of Revenue [Line Items]
Net sales	28.2	20.2	52.5	43.9
Process Flow Technologies | Outside
Disaggregation of Revenue [Line Items]
Net sales	310.7	239.3	598.8	495.9
Payment & Merchandising Technologies
Disaggregation of Revenue [Line Items]
Net sales	328.2	247.6	665.6	544.9
Payment & Merchandising Technologies | Payment Acceptance and Dispensing Products 1
Disaggregation of Revenue [Line Items]
Net sales	197.3	140.9	382.3	344.1
Payment & Merchandising Technologies | Banknotes and Security Products
Disaggregation of Revenue [Line Items]
Net sales	130.9	106.7	283.3	200.8
Payment & Merchandising Technologies | Outside
Disaggregation of Revenue [Line Items]
Net sales	328.2	247.6	665.6	544.9
Aerospace & Electronics
Disaggregation of Revenue [Line Items]
Net sales	157.5	157.4	311.5	350.3
Aerospace & Electronics | Commercial Original Equipment
Disaggregation of Revenue [Line Items]
Net sales	53.7	51.9	108.3	132.5
Aerospace & Electronics | Military and Other Original Equipment
Disaggregation of Revenue [Line Items]
Net sales	62.8	65.5	125.6	125.9
Aerospace & Electronics | Commercial Aftermarket Products
Disaggregation of Revenue [Line Items]
Net sales	25.3	20.3	44.8	54.2
Aerospace & Electronics | Military Aftermarket Products
Disaggregation of Revenue [Line Items]
Net sales	15.7	19.7	32.8	37.7
Aerospace & Electronics | Outside
Disaggregation of Revenue [Line Items]
Net sales	$ 157.5	$ 157.4	$ 311.5	$ 350.3