GOODWILL AND OTHER INTANGIBLE ASSETS - Activity in Goodwill by Reporting Segment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 28, 2014	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Goodwill [Line Items]
Gross goodwill		$ 478.7	[1]	$ 373.5	[1]	$ 307.6	[1]
Impairment losses		(4.4)	[1]	0	[1]	0	[1]
Goodwill, Net		474.3	[1]	373.5	[1]
Acquisitions (2)		105.2	[2]	65.9	[2]
Impairment loss		4.4	[2]	0	[2]
Acquisitions and Impairments		100.8	[2]	65.9	[2]
Goodwill [Roll Forward]
Goodwill at the beginning of year		373.5	[1]	307.6	[1]
Acquisitions and Impairments		100.8	[2]	65.9	[2]
Goodwill at end of year		474.3	[1]	373.5	[1]
AQH [Member]
Goodwill [Line Items]
Gross goodwill		156.8	[1]	156.8	[1]	156.8	[1]
Impairment losses		0	[1]	0	[1]	0	[1]
Goodwill, Net		156.8	[1]	156.8	[1]
Acquisitions (2)		0	[2]	0	[2]
Impairment loss		0	[2]	0	[2]
Acquisitions and Impairments		0	[2]	0	[2]
Goodwill [Roll Forward]
Goodwill at the beginning of year		156.8	[1]	156.8	[1]
Acquisitions and Impairments		0	[2]	0	[2]
Goodwill at end of year		156.8	[1]	156.8	[1]
SCS [Member]
Goodwill [Line Items]
Gross goodwill		80.9	[1]	80.9	[1]	15.8	[1]
Impairment losses		0	[1]	0	[1]	0	[1]
Goodwill, Net		80.9	[1]	80.9	[1]
Acquisitions (2)		0	[2]	65.1	[2]
Impairment loss		0	[2]	0	[2]
Acquisitions and Impairments		0	[2]	65.1	[2]
Goodwill [Roll Forward]
Goodwill at the beginning of year		80.9	[1]	15.8	[1]
Acquisitions and Impairments		0	[2]	65.1	[2]
Goodwill at end of year		80.9	[1]	80.9	[1]
ERG [Member]
Goodwill [Line Items]
Gross goodwill		131.4	[1]	131.4	[1]	131.4	[1]
Impairment losses		0	[1]	0	[1]	0	[1]
Goodwill, Net		131.4	[1]	131.4	[1]
Acquisitions (2)		0	[2]	0	[2]
Impairment loss		0	[2]	0	[2]
Acquisitions and Impairments		0	[2]	0	[2]
Goodwill [Roll Forward]
Goodwill at the beginning of year		131.4	[1]	131.4	[1]
Acquisitions and Impairments		0	[2]	0	[2]
Goodwill at end of year		131.4	[1]	131.4	[1]
RCH [Member]
Goodwill [Line Items]
Gross goodwill		105.2	[1]	0	[1]	0	[1]
Impairment losses		0	[1]	0	[1]	0	[1]
Goodwill, Net		105.2	[1]	0	[1]
Acquisitions (2)		105.2	[2]	0	[2]
Impairment loss		0	[2]	0	[2]
Acquisitions and Impairments		105.2	[2]	0	[2]
Goodwill [Roll Forward]
Goodwill at the beginning of year		0	[1]	0	[1]
Acquisitions and Impairments		105.2	[2]	0	[2]
Goodwill at end of year		105.2	[1]	0	[1]
AVC [Member]
Goodwill [Line Items]
Gross goodwill		4.4	[1]	4.4	[1]	3.6	[1]
Impairment losses		(4.4)	[1]	0	[1]	0	[1]
Goodwill, Net		0	[1]	4.4	[1]
Acquisitions (2)		0	[2]	0.8	[2]
Impairment loss	4.4	4.4	[2]	0	[2]
Acquisitions and Impairments		(4.4)	[2]	0.8	[2]
Goodwill [Roll Forward]
Goodwill at the beginning of year		4.4	[1]	3.6	[1]
Acquisitions and Impairments		(4.4)	[2]	0.8	[2]
Goodwill at end of year		$ 0	[1]	$ 4.4	[1]

[1] The CAS reporting unit did not have goodwill in any period presented.

[2] Acquisition adjustments recorded during 2014 for the RCH segment relate to the acquisition of Reznor and Phoenix. Acquisition adjustments recorded during 2013 for the SCS and AVC segments relate to the acquisition of 2GIG and Gefen Distribution, respectively. See Note 2, “Acquisitions”.