Sales - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Disaggregation of Revenue [Line Items]
Sales	$ 1,902.3	$ 1,860.0	$ 5,187.0	$ 5,317.6
Retail fueling
Disaggregation of Revenue [Line Items]
Sales	526.1	495.7	1,288.3	1,370.2
Industrial & Manufacturing
Disaggregation of Revenue [Line Items]
Sales	113.1	108.2	324.9	331.9
Vehicle repair
Disaggregation of Revenue [Line Items]
Sales	150.9	147.5	397.3	440.8
Utilities & Power
Disaggregation of Revenue [Line Items]
Sales	44.3	48.3	127.0	147.0
Medical
Disaggregation of Revenue [Line Items]
Sales	308.3	274.1	872.7	638.4
Other
Disaggregation of Revenue [Line Items]
Sales	371.0	406.7	1,100.2	1,175.9
Total direct sales
Disaggregation of Revenue [Line Items]
Sales	1,513.7	1,480.5	4,110.4	4,104.2
Distributors
Disaggregation of Revenue [Line Items]
Sales	388.6	379.5	1,076.6	1,213.4
Total Distributors
Disaggregation of Revenue [Line Items]
Sales	815.3	778.6	2,151.5	2,296.9
Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	1,155.7	1,145.6	3,297.6	3,288.9
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	113.1	108.2	324.9	331.9
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	44.3	48.3	127.0	147.0
Professional Instrumentation | Operating Segments | Medical
Disaggregation of Revenue [Line Items]
Sales	308.3	274.1	872.7	638.4
Professional Instrumentation | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Sales	307.2	341.7	910.1	976.1
Professional Instrumentation | Operating Segments | Total direct sales
Disaggregation of Revenue [Line Items]
Sales	772.9	772.3	2,234.7	2,093.4
Professional Instrumentation | Operating Segments | Distributors
Disaggregation of Revenue [Line Items]
Sales	382.8	373.3	1,062.9	1,195.5
Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	746.6	714.4	1,889.4	2,028.7
Industrial Technologies | Operating Segments | Retail fueling
Disaggregation of Revenue [Line Items]
Sales	526.1	495.7	1,288.3	1,370.2
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	150.9	147.5	397.3	440.8
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	63.8	65.0	190.1	199.8
Industrial Technologies | Operating Segments | Total direct sales
Disaggregation of Revenue [Line Items]
Sales	740.8	708.2	1,875.7	2,010.8
Industrial Technologies | Operating Segments | Distributors
Disaggregation of Revenue [Line Items]
Sales	5.8	6.2	13.7	17.9
United States
Disaggregation of Revenue [Line Items]
Sales	1,130.9	1,088.6	3,058.7	3,053.9
United States | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	605.5	611.2	1,749.7	1,732.8
United States | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	525.4	477.4	1,309.0	1,321.1
China
Disaggregation of Revenue [Line Items]
Sales	159.2	142.0	432.1	446.3
China | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	143.0	119.5	393.6	381.1
China | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	16.2	22.5	38.5	65.2
All other (each country individually less than 5% of total sales)
Disaggregation of Revenue [Line Items]
Sales	612.2	629.4	1,696.2	1,817.4
All other (each country individually less than 5% of total sales) | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	407.2	414.9	1,154.3	1,175.0
All other (each country individually less than 5% of total sales) | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	205.0	214.5	541.9	642.4
Products
Disaggregation of Revenue [Line Items]
Sales	1,671.3	1,624.6	4,526.8	4,652.7
Products | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	985.3	984.8	2,813.1	2,839.8
Products | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	686.0	639.8	1,713.7	1,812.9
Services
Disaggregation of Revenue [Line Items]
Sales	231.0	235.4	660.2	664.9
Services | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	170.4	160.8	484.5	449.1
Services | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	60.6	74.6	175.7	215.8
Professional tools and equipment
Disaggregation of Revenue [Line Items]
Sales	1,255.5	1,240.1	3,366.7	3,648.0
Professional tools and equipment | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	677.0	688.5	1,925.5	2,105.3
Professional tools and equipment | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	578.5	551.6	1,441.2	1,542.7
Industrial automation, controls and sensors
Disaggregation of Revenue [Line Items]
Sales	110.7	116.3	327.7	363.6
Industrial automation, controls and sensors | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	110.7	116.3	327.7	363.6
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	168.1	162.8	448.2	486.0
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	168.1	162.8	448.2	486.0
Medical technologies
Disaggregation of Revenue [Line Items]
Sales	308.1	274.1	872.5	638.4
Medical technologies | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	308.1	274.1	872.5	638.4
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	59.9	66.7	171.9	181.6
All other | Professional Instrumentation | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	59.9	66.7	171.9	181.6
All other | Industrial Technologies | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	$ 0.0	$ 0.0	$ 0.0	$ 0.0