Condensed Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Income Statement [Abstract]
Net sales	$ 834.1	$ 821.5	$ 2,540.6	$ 2,501.1
Cost of goods sold	(415.0)	(414.6)	(1,274.9)	(1,265.1)
Gross profit	419.1	406.9	1,265.7	1,236.0
Operating expenses	(261.5)	(263.3)	(786.3)	(803.7)
Operating earnings before financial services	157.6	143.6	479.4	432.3
Financial services revenue	71.6	61.1	207.2	177.2
Financial services expenses	(21.0)	(17.6)	(60.1)	(52.0)
Operating earnings from financial services	50.6	43.5	147.1	125.2
Operating earnings	208.2	187.1	626.5	557.5
Interest expense	(13.1)	(13.0)	(39.1)	(38.9)
Other income (expense) - net	(0.8)	(0.5)	(0.3)	(1.9)
Earnings before income taxes and equity earnings	194.3	173.6	587.1	516.7
Income tax expense	(59.6)	(53.9)	(179.4)	(161.9)
Earnings before equity earnings	134.7	119.7	407.7	354.8
Equity earnings, net of tax	0.5	0.2	2.2	1.3
Net earnings	135.2	119.9	409.9	356.1
Net earnings attributable to noncontrolling interests	(3.5)	(3.1)	(9.8)	(8.8)
Net earnings attributable to Snap-on Incorporated	$ 131.7	$ 116.8	$ 400.1	$ 347.3
Net earnings per share attributable to Snap-on Incorporated:
Basic	$ 2.27	$ 2.01	$ 6.89	$ 5.98
Diluted	$ 2.22	$ 1.98	$ 6.74	$ 5.88
Weighted-average shares outstanding:
Basic	58,013,852	58,084,784	58,076,627	58,110,620
Effect of dilutive securities	1,251,062	998,920	1,292,765	987,865
Diluted	59,264,914	59,083,704	59,369,392	59,098,485
Dividends declared per common share	$ 0.61	$ 0.53	$ 1.83	$ 1.59