Reportable Business Segments (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net Sales
Net Sales	$ 755.8	$ 923.0	$ 937.0	$ 687.8	$ 762.0	$ 818.2	$ 872.1	$ 644.1	$ 3,303.6	$ 3,096.4	$ 2,847.5
Segment Profit (Loss)
Subtotal that includes segment profit and eliminations									178.5	217.0	164.5
Reconciliation to income from continuing operations before income taxes:
Special product quality adjustment									(4.3)	(0.2)	18.3
Items in losses (gains) and other expenses, net that are excluded from segment profit									4.5	11.2	(10.9)
Restructuring charges	1.6	10.8	2.4	1.2	0.5	4.7	3.2	7.2	16.0	15.6	41.5
Impairment of assets	7.0								7.0		6.4
Goodwill impairment	7.6								7.6	0	0
Interest expense, net									16.8	12.8	8.2
Other expense, net									0.3	1.0	0.1
Income from continuing operations before income taxes									130.6	176.6	100.9
Residential Heating & Cooling [Member]
Net Sales
Net Sales									1,341.0	1,417.4	1,293.5
Segment Profit (Loss)
Subtotal that includes segment profit and eliminations									75.1	132.3	111.7
Reconciliation to income from continuing operations before income taxes:
Goodwill impairment									7.6
Commercial Heating & Cooling [Member]
Net Sales
Net Sales									696.0	620.0	594.6
Segment Profit (Loss)
Subtotal that includes segment profit and eliminations									79.4	69.3	49.3
Service Experts [Member]
Net Sales
Net Sales									528.6	590.3	535.4
Segment Profit (Loss)
Subtotal that includes segment profit and eliminations									1.5	19.3	16.6
Refrigeration [Member]
Net Sales
Net Sales									805.2	550.9	512.7
Segment Profit (Loss)
Subtotal that includes segment profit and eliminations									77.5	61.4	48.9
Corporate and Other [Member]
Segment Profit (Loss)
Subtotal that includes segment profit and eliminations									(54.4)	(65.5)	(62.5)
Eliminations [Member]
Net Sales
Net Sales									(67.2)	(82.2)	(88.7)
Segment Profit (Loss)
Subtotal that includes segment profit and eliminations									$ (0.6)	$ 0.2	$ 0.5