CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Revenues	$ 1,387.2	$ 1,288.4	$ 3,970.2	$ 3,561.8
Costs and expenses:
Cost of products sold	996.1	910.4	2,846.5	2,517.6
Selling, general and administrative	268.0	253.7	837.1	756.5
Intangible amortization	8.3	6.8	24.8	19.4
Impairment of goodwill and other intangible assets			24.7
Special charges, net	7.7	8.9	19.7	20.1
Operating income	107.1	108.6	217.4	248.2
Other expense, net	(34.6)	(6.8)	(33.7)	(20.7)
Interest expense	(23.7)	(22.4)	(71.5)	(63.5)
Interest income	1.4	1.0	4.2	3.9
Loss on early extinguishment of interest rate protection agreements and term loan		(25.6)		(25.6)
Equity earnings in joint ventures	6.9	6.4	20.7	22.3
Income from continuing operations before income taxes	57.1	61.2	137.1	164.6
Income tax benefit (provision)	4.8	(21.5)	(16.2)	(37.4)
Income from continuing operations	61.9	39.7	120.9	127.2
Income (loss) from discontinued operations, net of tax		0.1		(0.3)
Gain (loss) on disposition of discontinued operations, net of tax	0.4	(0.1)	1.2	12.1
Income from discontinued operations, net of tax	0.4		1.2	11.8
Net income	62.3	39.7	122.1	139.0
Less: Net income (loss) attributable to noncontrolling interests	1.6	0.3	4.0	(1.3)
Net income attributable to SPX Corporation common shareholders	60.7	39.4	118.1	140.3
Amounts attributable to SPX Corporation common shareholders:
Income from continuing operations, net of tax	60.3	39.4	116.9	128.5
Income from discontinued operations, net of tax	0.4		1.2	11.8
Net income	$ 60.7	$ 39.4	$ 118.1	$ 140.3
Basic income per share of common stock:
Income from continuing operations attributable to SPX Corporation common shareholders (in dollars per share)	$ 1.19	$ 0.79	$ 2.32	$ 2.59
Income from discontinued operations attributable to SPX Corporation common shareholders (in dollars per share)	$ 0.01		$ 0.02	$ 0.24
Net income per share attributable to SPX Corporation common shareholders (in dollars per share)	$ 1.20	$ 0.79	$ 2.34	$ 2.83
Weighted-average number of common shares outstanding - basic (in shares)	50,618	49,740	50,480	49,643
Diluted income per share of common stock:
Income from continuing operations attributable to SPX Corporation common shareholders (in dollars per share)	$ 1.19	$ 0.78	$ 2.29	$ 2.56
Income from discontinued operations attributable to SPX Corporation common shareholders (in dollars per share)	$ 0.01		$ 0.02	$ 0.23
Net income per share attributable to SPX Corporation common shareholders (in dollars per share)	$ 1.20	$ 0.78	$ 2.31	$ 2.79
Weighted-average number of common shares outstanding - diluted (in shares)	50,804	50,445	51,039	50,222