Sales - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Disaggregation of Revenue [Line Items]
Sales	$ 1,571.2	$ 1,864.7	$ 3,284.7	$ 3,457.6
Retail fueling
Disaggregation of Revenue [Line Items]
Sales	365.7	486.3	762.2	874.5
Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	102.8	114.1	211.8	223.7
Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	103.2	139.5	246.4	293.3
Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	38.8	49.1	82.7	98.7
Medical
Disaggregation of Revenue [Line Items]
Sales	284.4	265.3	564.4	364.3
Other
Disaggregation of Revenue [Line Items]
Sales	373.4	391.5	729.2	769.2
Total direct sales
Disaggregation of Revenue [Line Items]
Sales	1,268.3	1,445.8	2,596.7	2,623.7
Distributors
Disaggregation of Revenue [Line Items]
Sales	302.9	418.9	688.0	833.9
Total Distributors
Disaggregation of Revenue [Line Items]
Sales	597.0	773.1	1,336.2	1,518.3
Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	1,037.5	1,165.6	2,141.9	2,143.3
Professional Instrumentation | Operating Segments | Retail fueling
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0	0.0	0.0
Professional Instrumentation | Operating Segments | Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	102.8	114.1	211.8	223.7
Professional Instrumentation | Operating Segments | Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0	0.0	0.0
Professional Instrumentation | Operating Segments | Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	38.8	49.1	82.7	98.7
Professional Instrumentation | Operating Segments | Medical
Disaggregation of Revenue [Line Items]
Sales	284.4	265.3	564.4	364.3
Professional Instrumentation | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Sales	312.1	324.5	602.9	634.4
Professional Instrumentation | Operating Segments | Total direct sales
Disaggregation of Revenue [Line Items]
Sales	738.1	753.0	1,461.8	1,321.1
Professional Instrumentation | Operating Segments | Distributors
Disaggregation of Revenue [Line Items]
Sales	299.4	412.6	680.1	822.2
Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	533.7	699.1	1,142.8	1,314.3
Industrial Technologies | Operating Segments | Retail fueling
Disaggregation of Revenue [Line Items]
Sales	365.7	486.3	762.2	874.5
Industrial Technologies | Operating Segments | Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0	0.0	0.0
Industrial Technologies | Operating Segments | Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	103.2	139.5	246.4	293.3
Industrial Technologies | Operating Segments | Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0	0.0	0.0
Industrial Technologies | Operating Segments | Medical
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0	0.0	0.0
Industrial Technologies | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Sales	61.3	67.0	126.3	134.8
Industrial Technologies | Operating Segments | Total direct sales
Disaggregation of Revenue [Line Items]
Sales	530.2	692.8	1,134.9	1,302.6
Industrial Technologies | Operating Segments | Distributors
Disaggregation of Revenue [Line Items]
Sales	3.5	6.3	7.9	11.7
United States
Disaggregation of Revenue [Line Items]
Sales	908.0	1,077.7	1,927.8	1,965.3
United States | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	549.3	625.5	1,144.2	1,121.6
United States | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	358.7	452.2	783.6	843.7
China
Disaggregation of Revenue [Line Items]
Sales	145.4	154.3	272.9	304.3
China | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	131.6	130.4	250.6	261.6
China | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	13.8	23.9	22.3	42.7
All other (each country individually less than 5% of total sales)
Disaggregation of Revenue [Line Items]
Sales	517.8	632.7	1,084.0	1,188.0
All other (each country individually less than 5% of total sales) | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	356.6	409.7	747.1	760.1
All other (each country individually less than 5% of total sales) | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	161.2	223.0	336.9	427.9
Products
Disaggregation of Revenue [Line Items]
Sales	1,367.7	1,623.0	2,855.5	3,028.1
Products | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	887.3	998.8	1,827.8	1,855.0
Products | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	480.4	624.2	1,027.7	1,173.1
Services
Disaggregation of Revenue [Line Items]
Sales	203.5	241.7	429.2	429.5
Services | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	150.2	166.8	314.1	288.3
Services | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	53.3	74.9	115.1	141.2
Professional tools and equipment
Disaggregation of Revenue [Line Items]
Sales	1,003.9	1,256.1	2,111.2	2,407.9
Professional tools and equipment | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	589.9	711.2	1,248.5	1,416.8
Professional tools and equipment | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	414.0	544.9	862.7	991.1
Industrial automation, controls and sensors
Disaggregation of Revenue [Line Items]
Sales	107.4	127.2	217.0	247.3
Industrial automation, controls and sensors | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	107.4	127.2	217.0	247.3
Industrial automation, controls and sensors | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0	0.0	0.0
Franchise distribution
Disaggregation of Revenue [Line Items]
Sales	119.7	154.2	280.1	323.2
Franchise distribution | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0	0.0	0.0
Franchise distribution | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	119.7	154.2	280.1	323.2
Medical technologies
Disaggregation of Revenue [Line Items]
Sales	284.4	265.3	564.4	364.3
Medical technologies | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	284.4	265.3	564.4	364.3
Medical technologies | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	0.0	0.0	0.0	0.0
All other
Disaggregation of Revenue [Line Items]
Sales	55.8	61.9	112.0	114.9
All other | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	55.8	61.9	112.0	114.9
All other | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	$ 0.0	$ 0.0	$ 0.0	$ 0.0