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Segments - Products and Services (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Revenue from External Customer [Line Items]
Net sales	$ 851.7	$ 821.5	$ 851.8	$ 827.8	$ 857.4	$ 806.3	$ 826.5	$ 787.5	$ 3,352.8	$ 3,277.7	$ 3,056.5
Financial services revenue	$ 63.1	$ 61.1	$ 58.7	$ 57.4	$ 59.4	$ 53.6	$ 51.7	$ 50.2	240.3	214.9	181.0
Total revenue									3,593.1	3,492.6	3,237.5
Tools [Member]
Revenue from External Customer [Line Items]
Net sales									1,910.1	1,868.5	1,743.3
Diagnostics and Repair Information [Member]
Revenue from External Customer [Line Items]
Net sales									689.6	689.5	652.0
Equipment [Member]
Revenue from External Customer [Line Items]
Net sales									$ 753.1	$ 719.7	$ 661.2

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No definition available.

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The aggregate financial services revenue and operating interest income earned during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
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