CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenues	$ 1,145.8	$ 1,176.7	$ 3,398.2	$ 3,465.0
Costs and expenses:
Cost of products sold	810.8	858.9	2,443.6	2,542.4
Selling, general and administrative	233.4	226.0	736.5	732.3
Intangible amortization	8.2	8.8	24.4	26.4
Impairment of intangible assets			2.0
Special charges, net	6.9	6.4	25.1	17.2
Operating income	86.5	76.6	166.6	146.7
Other income (expense), net	(4.1)		(4.2)	19.0
Interest expense	(27.1)	(28.7)	(83.4)	(85.0)
Interest income	2.6	1.6	6.2	4.5
Equity earnings in joint ventures	11.4	8.6	30.6	25.0
Income from continuing operations before income taxes	69.3	58.1	115.8	110.2
Income tax provision	(12.3)	(9.6)	(17.2)	(27.0)
Income from continuing operations	57.0	48.5	98.6	83.2
Income from discontinued operations, net of tax	4.9	12.4	10.2	39.6
Gain (loss) on disposition of discontinued operations, net of tax	0.2	(0.7)	(2.3)	(1.6)
Income from discontinued operations, net of tax	5.1	11.7	7.9	38.0
Net income	62.1	60.2	106.5	121.2
Net income (loss) attributable to noncontrolling interests	(0.8)	2.4	2.5	2.5
Net income attributable to SPX Corporation common shareholders	62.9	57.8	104.0	118.7
Amounts attributable to SPX Corporation common shareholders:
Income from continuing operations, net of tax	57.8	46.1	96.3	80.5
Income from discontinued operations, net of tax	5.1	11.7	7.7	38.2
Net income	62.9	57.8	104.0	118.7
Basic income per share of common stock:
Income from continuing operations attributable to SPX Corporation common shareholders (in dollars per share)	$ 1.29	$ 0.92	$ 2.11	$ 1.60
Income from discontinued operations attributable to SPX Corporation common shareholders (in dollars per share)	$ 0.12	$ 0.24	$ 0.17	$ 0.77
Net income per share attributable to SPX Corporation common shareholders (in dollars per share)	$ 1.41	$ 1.16	$ 2.28	$ 2.37
Weighted-average number of common shares outstanding - basic (in shares)	44,709	49,958	45,592	50,174
Diluted income per share of common stock:
Income from continuing operations attributable to SPX Corporation common shareholders (in dollars per share)	$ 1.28	$ 0.92	$ 2.09	$ 1.58
Income from discontinued operations attributable to SPX Corporation common shareholders (in dollars per share)	$ 0.12	$ 0.24	$ 0.16	$ 0.76
Net income per share attributable to SPX Corporation common shareholders (in dollars per share)	$ 1.40	$ 1.16	$ 2.25	$ 2.34
Weighted-average number of common shares outstanding - diluted (in shares)	45,037	50,038	46,140	50,799
Comprehensive income	$ 137.6	$ 139.6	$ 121.8	$ 134.9