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Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Income Statement [Abstract]
Net sales	$ 3,430.4	$ 3,352.8	$ 3,277.7
Cost of goods sold	(1,720.8)	(1,704.5)	(1,693.4)
Gross profit	1,709.6	1,648.3	1,584.3
Operating expenses	(1,054.1)	(1,053.7)	(1,048.7)
Operating earnings before financial services	655.5	594.6	535.6
Financial services revenue	281.4	240.3	214.9
Financial services expenses	(82.7)	(70.1)	(65.8)
Operating earnings from financial services	198.7	170.2	149.1
Operating earnings	854.2	764.8	684.7
Interest expense	(52.2)	(51.9)	(52.9)
Other income (expense) - net	(0.6)	(2.4)	(0.9)
Earnings before income taxes and equity earnings	801.4	710.5	630.9
Income tax expense	(244.3)	(221.2)	(199.5)
Earnings before equity earnings	557.1	489.3	431.4
Equity earnings, net of tax	2.5	1.3	0.7
Net earnings	559.6	490.6	432.1
Net earnings attributable to noncontrolling interests	(13.2)	(11.9)	(10.2)
Net earnings attributable to Snap-on Incorporated	$ 546.4	$ 478.7	$ 421.9
Net earnings per share attributable to Snap-on Incorporated:
Basic	$ 9.40	$ 8.24	$ 7.26
Diluted	$ 9.20	$ 8.10	$ 7.14
Weighted-average shares outstanding:
Basic	58.1	58.1	58.1
Effect of dilutive securities	1.3	1.0	1.0
Diluted	59.4	59.1	59.1

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