BUSINESS SEGMENTS - Changes in Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 29, 2017	Dec. 30, 2016
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 764.6	$ 756.5
Acquisition related		4.5
Reassignment of goodwill		0.0
Foreign currency translation	13.5	3.6
Goodwill, Ending Balance	778.1	764.6
Network and Security Solutions [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	405.0	393.3
Acquisition related		(0.5)
Reassignment of goodwill		11.2
Foreign currency translation	3.8	1.0
Goodwill, Ending Balance	408.8	405.0
Electrical and Electronic Solutions [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	181.0	211.9
Acquisition related		0.7
Reassignment of goodwill		(31.8)
Foreign currency translation	0.7	0.2
Goodwill, Ending Balance	181.7	181.0
Utility Power Solutions [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	178.6	151.3
Acquisition related		4.3
Reassignment of goodwill		20.6
Foreign currency translation	9.0	2.4
Goodwill, Ending Balance	$ 187.6	$ 178.6

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of transfers into (out of) an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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