Amount after tax of income (loss) from continuing operations attributable to the parent.

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Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Amount after tax of income (loss) from a discontinued operation attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

+ References + Details

Shareholders' Equity and Long-Term Incentive Compensation - Components Used For Calculation Of Basic And Diluted Income (Loss) (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Oct. 02, 2021	Jul. 03, 2021	Apr. 03, 2021	Dec. 31, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Income from continuing operations attributable to SPX Corporation common stockholders for calculating basic and diluted income per share									$ 59.0	$ 73.8	$ 76.3
Income (loss) from discontinued operations, net of tax	$ 2.0	$ 316.4	$ 44.2	$ 3.8	$ 5.3	$ 3.1	$ 8.2	$ 8.6	366.4	25.2	(11.0)
Adjustment related to redeemable noncontrolling interest (Note 15)									0.0	0.0	5.6
Income (loss) from discontinued operations attributable to SPX Corporation common stockholders for calculating basic and diluted income per share									$ 366.4	$ 25.2	$ (5.4)
Denominator:
Weighted-average number of common shares used in basic income per share (in shares)									45,289	44,628	43,942
Dilutive securities — Employee stock options, restricted stock shares and restricted stock units (in shares)									1,206	1,138	1,015
Weighted-average number of common shares and dilutive securities used in diluted income per share (in shares)									46,495	45,766	44,957