BUSINESS SEGMENTS (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Segment Reporting Information [Line Items]
Total Sales	$ 878.8	$ 813.5
Gross Profit	234.9	215.5
Operating Expenses	146.7	140.5	$ 552.5	$ 542.5	$ 596.8
Income from Operations	88.2	75.0
Depreciation and Amortization	34.8	34.4
Capital Expenditures	19.3	17.0
Identifiable assets	4,507.2		4,388.2
Commercial and Industrial Systems
Segment Reporting Information [Line Items]
Total Sales	414.0	381.2
Operating Expenses			277.0	275.4	305.5
Identifiable assets	1,922.3		1,854.1
Climate Solutions
Segment Reporting Information [Line Items]
Total Sales	259.9	247.7
Operating Expenses			113.9	114.5	114.7
Identifiable assets	941.7		909.9
Power Transmission Solutions
Segment Reporting Information [Line Items]
Total Sales	204.9	184.6
Operating Expenses			161.6	$ 152.6	$ 176.6
Identifiable assets	1,643.2		$ 1,624.2
Intersegment sales | Commercial and Industrial Systems
Segment Reporting Information [Line Items]
Total Sales	15.1	15.9
Intersegment sales | Climate Solutions
Segment Reporting Information [Line Items]
Total Sales	5.5	8.2
Intersegment sales | Power Transmission Solutions
Segment Reporting Information [Line Items]
Total Sales	4.6	0.7
Operating Segments | Commercial and Industrial Systems
Segment Reporting Information [Line Items]
Total Sales	429.1	397.1
Gross Profit	99.8	95.5
Operating Expenses	70.7	69.8
Income from Operations	29.1	25.7
Depreciation and Amortization	15.4	15.2
Capital Expenditures	11.0	10.6
Operating Segments | Climate Solutions
Segment Reporting Information [Line Items]
Total Sales	265.4	255.9
Gross Profit	63.7	60.8
Operating Expenses	31.4	29.4
Income from Operations	32.3	31.4
Depreciation and Amortization	5.4	5.5
Capital Expenditures	4.5	4.3
Operating Segments | Power Transmission Solutions
Segment Reporting Information [Line Items]
Total Sales	209.5	185.3
Gross Profit	71.4	59.2
Operating Expenses	44.6	41.3
Income from Operations	26.8	17.9
Depreciation and Amortization	14.0	13.7
Capital Expenditures	3.8	2.1
Eliminations
Segment Reporting Information [Line Items]
Total Sales	(25.2)	(24.8)
Gross Profit	0.0	0.0
Operating Expenses	0.0	0.0
Income from Operations	0.0	0.0
Depreciation and Amortization	0.0	0.0
Capital Expenditures	$ 0.0	$ 0.0