Business Segments (Schedule Of Reportable Segments) (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jul. 04, 2015 USD ($)	Sep. 27, 2014 segment	Jun. 28, 2014 USD ($)	Jul. 04, 2015 USD ($) segment	Jun. 28, 2014 USD ($)	Jan. 03, 2015 USD ($)
Segment Reporting Information [Line Items]
External sales	$ 942.2		$ 850.4	$ 1,853.9	$ 1,651.6
Intersegment sales	0.0		0.0	0.0	0.0
Total sales	942.2		850.4	1,853.9	1,651.6
Gross profit	251.4		211.0	472.3	405.4
Total Operating expenses	148.2		123.3	305.5	248.0
Income From Operations	103.2		87.7	166.8	157.4
Depreciation and amortization	42.2		35.2	78.1	68.0
Capital expenditures	23.5		20.6	44.7	42.9
Identifiable assets	4,965.0		3,799.4	$ 4,965.0	3,799.4	$ 3,407.6
Number of reportable segments | segment		2		3
Operating Segments | Commercial and Industrial Systems
Segment Reporting Information [Line Items]
External sales	441.0		479.0	$ 897.4	932.5
Intersegment sales	22.4		21.5	46.3	38.0
Total sales	463.4		500.5	943.7	970.5
Gross profit	113.6		124.7	226.5	240.4
Total Operating expenses	72.1		77.7	151.7	156.2
Income From Operations	41.5		47.0	74.8	84.2
Depreciation and amortization	19.3		20.4	38.8	38.8
Capital expenditures	12.4		14.5	28.1	28.3
Identifiable assets	2,424.8		2,661.9	2,424.8	2,661.9
Operating Segments | Climate Solutions
Segment Reporting Information [Line Items]
External sales	286.1		303.5	566.5	588.6
Intersegment sales	5.8		4.4	12.9	8.5
Total sales	291.9		307.9	579.4	597.1
Gross profit	73.0		68.4	136.7	131.1
Total Operating expenses	29.3		35.3	59.6	71.7
Income From Operations	43.7		33.1	77.1	59.4
Depreciation and amortization	7.6		11.8	14.6	23.3
Capital expenditures	4.1		4.8	8.7	10.5
Identifiable assets	900.8		942.0	900.8	942.0
Operating Segments | Power Transmission Solutions
Segment Reporting Information [Line Items]
External sales	215.1		67.9	390.0	130.5
Intersegment sales	1.2		1.5	2.3	2.5
Total sales	216.3		69.4	392.3	133.0
Gross profit	64.8		17.9	109.1	33.9
Total Operating expenses	46.8		10.3	94.2	20.1
Income From Operations	18.0		7.6	14.9	13.8
Depreciation and amortization	15.3		3.0	24.7	5.9
Capital expenditures	7.0		1.3	7.9	4.1
Identifiable assets	1,639.4		195.5	1,639.4	195.5
Eliminations
Segment Reporting Information [Line Items]
External sales	0.0		0.0	0.0	0.0
Intersegment sales	(29.4)		(27.4)	(61.5)	(49.0)
Total sales	(29.4)		(27.4)	(61.5)	(49.0)
Gross profit	0.0		0.0	0.0	0.0
Total Operating expenses	0.0		0.0	0.0	0.0
Income From Operations	0.0		0.0	0.0	0.0
Depreciation and amortization	0.0		0.0	0.0	0.0
Capital expenditures	0.0		0.0	0.0	0.0
Identifiable assets	$ 0.0		$ 0.0	$ 0.0	$ 0.0