Sales - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018
Disaggregation of Revenue [Line Items]
Sales	$ 1,592.9	$ 1,492.2
Retail fueling
Disaggregation of Revenue [Line Items]
Sales	388.2	348.3
Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	109.6	105.5
Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	153.8	158.8
Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	49.6	55.4
Other
Disaggregation of Revenue [Line Items]
Sales	463.0	381.9
Total direct sales
Disaggregation of Revenue [Line Items]
Sales	1,164.2	1,049.9
Distributors
Disaggregation of Revenue [Line Items]
Sales	428.7	442.3
Total Distributors
Disaggregation of Revenue [Line Items]
Sales	745.2	728.1
Products
Disaggregation of Revenue [Line Items]
Sales	1,405.1	1,332.4
Services
Disaggregation of Revenue [Line Items]
Sales	187.8	159.8
Professional tools and equipment
Disaggregation of Revenue [Line Items]
Sales	1,226.9	1,119.2
Industrial automation, controls and sensors
Disaggregation of Revenue [Line Items]
Sales	130.0	138.0
Franchise distribution
Disaggregation of Revenue [Line Items]
Sales	169.0	173.0
All other
Disaggregation of Revenue [Line Items]
Sales	67.0	62.0
Professional Instrumentation
Disaggregation of Revenue [Line Items]
Sales	947.3	871.7
Professional Instrumentation | Products
Disaggregation of Revenue [Line Items]
Sales	825.8	776.6
Professional Instrumentation | Services
Disaggregation of Revenue [Line Items]
Sales	121.5	95.1
Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	947.3	871.7
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	96.8	90.4
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	49.6	55.4
Professional Instrumentation | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Sales	391.1	301.2
Professional Instrumentation | Operating Segments | Total direct sales
Disaggregation of Revenue [Line Items]
Sales	537.5	447.0
Professional Instrumentation | Operating Segments | Distributors
Disaggregation of Revenue [Line Items]
Sales	409.8	424.7
Professional Instrumentation | Operating Segments | Professional tools and equipment
Disaggregation of Revenue [Line Items]
Sales	780.3	704.7
Professional Instrumentation | Operating Segments | Industrial automation, controls and sensors
Disaggregation of Revenue [Line Items]
Sales	100.0	105.0
Professional Instrumentation | Operating Segments | Franchise distribution
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Professional Instrumentation | Operating Segments | All other
Disaggregation of Revenue [Line Items]
Sales	67.0	62.0
Industrial Technologies
Disaggregation of Revenue [Line Items]
Sales	645.6	620.5
Industrial Technologies | Products
Disaggregation of Revenue [Line Items]
Sales	579.3	555.8
Industrial Technologies | Services
Disaggregation of Revenue [Line Items]
Sales	66.3	64.7
Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	645.6	620.5
Industrial Technologies | Operating Segments | Retail fueling
Disaggregation of Revenue [Line Items]
Sales	388.2	348.3
Industrial Technologies | Operating Segments | Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	12.8	15.1
Industrial Technologies | Operating Segments | Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	153.8	158.8
Industrial Technologies | Operating Segments | Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
Industrial Technologies | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Sales	71.9	80.7
Industrial Technologies | Operating Segments | Total direct sales
Disaggregation of Revenue [Line Items]
Sales	626.7	602.9
Industrial Technologies | Operating Segments | Distributors
Disaggregation of Revenue [Line Items]
Sales	18.9	17.6
Industrial Technologies | Operating Segments | Professional tools and equipment
Disaggregation of Revenue [Line Items]
Sales	446.6	414.5
Industrial Technologies | Operating Segments | Industrial automation, controls and sensors
Disaggregation of Revenue [Line Items]
Sales	30.0	33.0
Industrial Technologies | Operating Segments | Franchise distribution
Disaggregation of Revenue [Line Items]
Sales	169.0	173.0
Industrial Technologies | Operating Segments | All other
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0
United States
Disaggregation of Revenue [Line Items]
Sales	887.6	788.7
United States | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	486.0	406.4
United States | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	401.6	382.3
China
Disaggregation of Revenue [Line Items]
Sales	150.0	143.6
China | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	128.4	125.1
China | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	21.6	18.5
Germany
Disaggregation of Revenue [Line Items]
Sales	57.6	58.3
Germany | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	32.4	35.9
Germany | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	25.2	22.4
All other (each country individually less than 5% of total sales)
Disaggregation of Revenue [Line Items]
Sales	497.7	501.6
All other (each country individually less than 5% of total sales) | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	300.5	304.3
All other (each country individually less than 5% of total sales) | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	$ 197.2	$ 197.3