INFORMATION ON REPORTABLE SEGMENTS (Details)	3 Months Ended		9 Months Ended
	Sep. 26, 2015 USD ($) country	Sep. 27, 2014 USD ($)	Sep. 26, 2015 USD ($) country segment	Sep. 16, 2015 segment	Sep. 27, 2014 USD ($)	Dec. 31, 2014 USD ($)
Information on reportable segments and other operating segments
Number of reportable segments | segment			3	2
Revenues:
Revenues	$ 374,100,000	$ 489,600,000	$ 1,209,800,000		$ 1,397,100,000
Revenues recognized under percentage of completion method	78,800,000	325,100,000	156,000,000		452,000,000
Income
Stock-based compensation expense			(30,500,000)		(29,800,000)
Pension and postretirement expense			(22,900,000)		(36,700,000)
Special charges, net	(8,400,000)	(1,300,000)	(14,000,000)		(5,700,000)
Consolidated operating loss	(113,600,000)	(2,100,000)	(166,900,000)		(62,500,000)
Assets
Costs and estimated earnings in excess of billings	105,700,000		105,700,000			$ 95,600,000
Liabilities
Billings in excess of costs and estimated earnings on uncompleted contracts reported as a component of accrued expenses	124,300,000		124,300,000			$ 95,800,000
Previously Reported
Revenues:
Revenues		1,171,200,000			3,443,400,000
Income
Consolidated operating loss		300,000			800,000
Reportable and other operating segments
Income
Consolidated operating loss	(64,700,000)	38,000,000	(29,500,000)		94,100,000
Corporate
Income
Corporate expense	(27,600,000)	(33,000,000)	(84,500,000)		(97,800,000)
Special charges, net	(1,000,000)	200,000	(1,000,000)		(700,000)
Segment Reconciling Items
Income
Stock-based compensation expense	(5,500,000)	(3,600,000)	(30,500,000)		(29,800,000)
Pension and postretirement expense	(7,400,000)	(2,200,000)	(8,400,000)		(23,300,000)
Special charges, net	(8,400,000)	(1,300,000)	(14,000,000)		(5,700,000)
HVAC segment
Revenues:
Revenues	142,700,000	137,400,000	368,700,000		361,100,000
Income
Special charges, net	100,000	(900,000)	(1,100,000)		(900,000)
HVAC segment | Reportable and other operating segments
Income
Consolidated operating loss	23,500,000	18,100,000	49,400,000		40,600,000
Detection and Measurement segment
Revenues:
Revenues	55,900,000	57,300,000	166,000,000		180,700,000
Income
Special charges, net	100,000	0	(500,000)		(900,000)
Detection and Measurement segment | Reportable and other operating segments
Income
Consolidated operating loss	8,300,000	10,700,000	27,400,000		38,900,000
Power segment
Revenues:
Revenues	175,500,000	294,900,000	675,100,000		855,300,000
Income
Special charges, net	(7,600,000)	(600,000)	(11,400,000)		(3,200,000)
Power segment | Scenario, Adjustment
Revenues:
Revenues	(57,200,000)		(95,000,000)
Income
Consolidated operating loss	(57,200,000)		(95,000,000)
Liabilities
Loss recorded related to projects	59,600,000	0	66,100,000		1,200,000
Power segment | Reportable and other operating segments
Income
Consolidated operating loss	$ (96,500,000)	$ 9,200,000	$ (106,300,000)		$ 14,600,000
Minimum
Information on reportable segments and other operating segments
Number of countries in which entity operates (over 20 countries) | country	20		20
Number of countries in which entity sells its products and services (over 150 countries) | country	100		100