Business Segments (Schedule Of Reportable Segments) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015 USD ($)	Sep. 27, 2014 USD ($) segment	Oct. 03, 2015 USD ($) segment	Sep. 27, 2014 USD ($)	Jan. 03, 2015 USD ($)
Segment Reporting Information [Line Items]
External sales	$ 882.3	$ 829.8	$ 2,736.2	$ 2,481.4
Intersegment sales	0.0	0.0	0.0	0.0
Total sales	882.3	829.8	2,736.2	2,481.4
Gross profit	241.1	203.8	713.4	609.2
Total operating expenses	141.0	129.1	446.5	377.1
Income From Operations	100.1	74.7	266.9	232.1
Depreciation and amortization	42.0	35.6	120.1	103.6
Capital expenditures	20.7	17.6	65.4	60.5
Identifiable assets	4,878.4	$ 3,671.4	$ 4,878.4	3,671.4	$ 3,407.6
Number of reportable segments | segment		2	3
Operating Segments | Commercial and Industrial Systems
Segment Reporting Information [Line Items]
External sales	426.8	$ 472.3	$ 1,324.2	1,404.8
Intersegment sales	14.4	21.5	60.7	38.0
Total sales	441.2	493.8	1,384.9	1,442.8
Gross profit	110.3	117.6	336.8	357.9
Total operating expenses	71.6	83.9	223.2	240.2
Income From Operations	38.8	33.6	113.6	117.8
Depreciation and amortization	19.6	21.4	58.4	60.2
Capital expenditures	10.4	13.7	38.5	42.0
Identifiable assets	2,380.2	2,598.8	2,380.2	2,598.8
Operating Segments | Climate Solutions
Segment Reporting Information [Line Items]
External sales	264.4	290.0	830.9	878.6
Intersegment sales	6.0	4.4	18.9	8.5
Total sales	270.4	294.4	849.8	887.1
Gross profit	70.8	67.9	207.5	199.2
Total operating expenses	30.1	34.9	89.7	106.6
Income From Operations	40.7	33.1	117.8	92.5
Depreciation and amortization	7.1	11.0	21.7	34.3
Capital expenditures	4.6	2.4	13.3	12.9
Identifiable assets	888.2	886.7	888.2	886.7
Operating Segments | Power Transmission Solutions
Segment Reporting Information [Line Items]
External sales	191.1	67.5	581.1	198.0
Intersegment sales	0.8	1.5	3.1	2.5
Total sales	191.9	69.0	584.2	200.5
Gross profit	60.0	18.3	169.1	52.1
Total operating expenses	39.3	10.3	133.6	30.3
Income From Operations	20.6	8.0	35.5	21.8
Depreciation and amortization	15.3	3.2	40.0	9.1
Capital expenditures	5.7	1.5	13.6	5.6
Identifiable assets	1,610.0	185.9	1,610.0	185.9
Eliminations
Segment Reporting Information [Line Items]
External sales	0.0	0.0	0.0	0.0
Intersegment sales	(21.2)	(27.4)	(82.7)	(49.0)
Total sales	(21.2)	(27.4)	(82.7)	(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