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INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Mar. 28, 2015	Oct. 01, 2016	Sep. 26, 2015
Uncertain Tax Benefits
Gross unrecognized tax benefits	$ 44.0			$ 44.0
Net unrecognized tax benefits	26.7			26.7
Unrecognized tax benefits that would impact effective tax rate if recognized	25.4			25.4
Gross accrued interest	3.7			3.7
Net accrued interest	2.4			2.4
Penalties recorded				0.0
Other Tax Matters
Income tax (provision) benefit	0.0	$ (5.5)		(6.1)	$ 8.6
Pre-tax income (loss) from continuing operations	2.6	(125.2)		26.8	(192.2)
Gain on sale of dry cooling business	1.7	0.0		18.4	0.0
Pre-tax losses generated for which no tax benefit was recognized		$ 102.0			$ 130.0
Income tax expense related to spin-off transaction			$ 3.6
Dry Cooling Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Other Tax Matters
Gain on sale of dry cooling business	1.7			18.4
Taxes provided in connection with sale of dry cooling business				0.3
Foreign
Other Tax Matters
Foreign losses generated during the period for which no tax benefit was recognized				10.5
Income tax expense related to reorganization actions to facilitate separation			$ 3.4
Minimum
Uncertain Tax Benefits
Reasonably possible amount that unrecognized tax benefits could decrease within next 12 months	6.0			6.0
Maximum
Uncertain Tax Benefits
Reasonably possible amount that unrecognized tax benefits could decrease within next 12 months	$ 10.0			$ 10.0

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