Sales - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2020	Mar. 29, 2019
Disaggregation of Revenue [Line Items]
Sales	$ 1,713.5	$ 1,592.9
Retail fueling
Disaggregation of Revenue [Line Items]
Sales	396.5	388.2
Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	109.0	109.6
Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	143.2	153.8
Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	43.9	49.6
Medical
Disaggregation of Revenue [Line Items]
Sales	280.0	99.0
Other
Disaggregation of Revenue [Line Items]
Sales	355.8	377.7
Total direct sales
Disaggregation of Revenue [Line Items]
Sales	1,328.4	1,177.9
Distributors
Disaggregation of Revenue [Line Items]
Sales	385.1	415.0
Total Distributors
Disaggregation of Revenue [Line Items]
Sales	739.0	745.2
Products
Disaggregation of Revenue [Line Items]
Sales	1,487.8	1,405.1
Services
Disaggregation of Revenue [Line Items]
Sales	225.7	187.8
Professional tools and equipment
Disaggregation of Revenue [Line Items]
Sales	1,107.3	1,151.8
Industrial automation, controls and sensors
Disaggregation of Revenue [Line Items]
Sales	109.6	120.1
Franchise distribution
Disaggregation of Revenue [Line Items]
Sales	160.4	169.0
Medical technologies
Disaggregation of Revenue [Line Items]
Sales	280.0	99.0
All other
Disaggregation of Revenue [Line Items]
Sales	56.2	53.0
Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	1,104.4	977.7
Professional Instrumentation | Operating Segments | Retail fueling
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Professional Instrumentation | Operating Segments | Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	109.0	109.6
Professional Instrumentation | Operating Segments | Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Professional Instrumentation | Operating Segments | Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	43.9	49.6
Professional Instrumentation | Operating Segments | Medical
Disaggregation of Revenue [Line Items]
Sales	280.0	99.0
Professional Instrumentation | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Sales	290.8	309.9
Professional Instrumentation | Operating Segments | Total direct sales
Disaggregation of Revenue [Line Items]
Sales	723.7	568.1
Professional Instrumentation | Operating Segments | Distributors
Disaggregation of Revenue [Line Items]
Sales	380.7	409.6
Professional Instrumentation | Operating Segments | Products
Disaggregation of Revenue [Line Items]
Sales	940.5	856.2
Professional Instrumentation | Operating Segments | Services
Disaggregation of Revenue [Line Items]
Sales	163.9	121.5
Professional Instrumentation | Operating Segments | Professional tools and equipment
Disaggregation of Revenue [Line Items]
Sales	658.6	705.6
Professional Instrumentation | Operating Segments | Industrial automation, controls and sensors
Disaggregation of Revenue [Line Items]
Sales	109.6	120.1
Professional Instrumentation | Operating Segments | Franchise distribution
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Professional Instrumentation | Operating Segments | Medical technologies
Disaggregation of Revenue [Line Items]
Sales	280.0	99.0
Professional Instrumentation | Operating Segments | All other
Disaggregation of Revenue [Line Items]
Sales	56.2	53.0
Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	609.1	615.2
Industrial Technologies | Operating Segments | Retail fueling
Disaggregation of Revenue [Line Items]
Sales	396.5	388.2
Industrial Technologies | Operating Segments | Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Industrial Technologies | Operating Segments | Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	143.2	153.8
Industrial Technologies | Operating Segments | Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Industrial Technologies | Operating Segments | Medical
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Industrial Technologies | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Sales	65.0	67.8
Industrial Technologies | Operating Segments | Total direct sales
Disaggregation of Revenue [Line Items]
Sales	604.7	609.8
Industrial Technologies | Operating Segments | Distributors
Disaggregation of Revenue [Line Items]
Sales	4.4	5.4
Industrial Technologies | Operating Segments | Products
Disaggregation of Revenue [Line Items]
Sales	547.3	548.9
Industrial Technologies | Operating Segments | Services
Disaggregation of Revenue [Line Items]
Sales	61.8	66.3
Industrial Technologies | Operating Segments | Professional tools and equipment
Disaggregation of Revenue [Line Items]
Sales	448.7	446.2
Industrial Technologies | Operating Segments | Industrial automation, controls and sensors
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Industrial Technologies | Operating Segments | Franchise distribution
Disaggregation of Revenue [Line Items]
Sales	160.4	169.0
Industrial Technologies | Operating Segments | Medical technologies
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Industrial Technologies | Operating Segments | All other
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
United States
Disaggregation of Revenue [Line Items]
Sales	1,019.8	887.6
United States | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	594.9	496.1
United States | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	424.9	391.5
China
Disaggregation of Revenue [Line Items]
Sales	127.5	150.0
China | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	119.0	131.2
China | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	8.5	18.8
All other (each country individually less than 5% of total sales)
Disaggregation of Revenue [Line Items]
Sales	566.2	555.3
All other (each country individually less than 5% of total sales) | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	390.5	350.4
All other (each country individually less than 5% of total sales) | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	$ 175.7	$ 204.9