CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended	6 Months Ended
Jun. 27, 2026	Jun. 28, 2025	Jun. 27, 2026	Jun. 28, 2025
Income Statement [Abstract]
Revenues	$ 679.0	$ 552.4	$ 1,245.8	$ 1,035.0
Costs and expenses:
Cost of products sold	406.2	323.5	742.4	610.2
Selling, general and administrative	129.9	117.2	249.3	226.7
Selling, general and administrative — intangible amortization	26.3	24.6	49.6	44.3
Special charges, net	1.6	0.0	1.8	0.1
Other operating expense, net	0.0	0.5	0.0	0.5
Operating income	115.0	86.6	202.7	153.2
Other income (expense), net	(5.1)	(2.1)	(8.1)	0.6
Interest expense	(8.8)	(15.6)	(17.2)	(27.9)
Interest income	1.1	1.0	2.2	1.9
Income from continuing operations before income taxes	102.2	69.9	179.6	127.8
Income tax provision	(22.9)	(17.4)	(35.9)	(23.6)
Income from continuing operations	79.3	52.5	143.7	104.2
Income from discontinued operations, net of tax	0.0	0.0	1.6	0.0
Loss on disposition of discontinued operations, net of tax	(0.9)	(0.3)	(7.0)	(0.8)
Loss from discontinued operations, net of tax	(0.9)	(0.3)	(5.4)	(0.8)
Net income	$ 78.4	$ 52.2	$ 138.3	$ 103.4
Basic income per share of common stock:
Income from continuing operations (in dollars per share)	$ 1.58	$ 1.12	$ 2.88	$ 2.24
Loss from discontinued operations (in dollars per share)	(0.01)	0	(0.11)	(0.02)
Net income per share (in dollars per share)	$ 1.57	$ 1.12	$ 2.77	$ 2.22
Weighted-average number of common shares outstanding — basic (in shares)	50,070	46,716	49,999	46,586
Diluted income per share of common stock:
Income from continuing operations (in dollars per share)	$ 1.56	$ 1.10	$ 2.84	$ 2.21
Loss from discontinued operations, net of tax (in dollars per share)	(0.01)	0	(0.11)	(0.02)
Net income per share (in dollars per share)	$ 1.55	$ 1.10	$ 2.73	$ 2.19
Weighted-average number of common shares outstanding — diluted (in shares)	50,675	47,396	50,597	47,255
Comprehensive income	$ 56.2	$ 82.6	$ 109.8	$ 143.6

Amortization of Intangible Assets, Selling, General and Administrative

No definition available.

Name:	spxc_AmortizationOfIntangibleAssetsSellingGeneralAndAdministrative
Namespace Prefix:	spxc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with an exit from business activities or restructuring pursuant to a duly authorized plan, excluding asset retirement obligations. Such costs include charges associated with employee terminations, lease terminations, asset impairments, etc.

+ References

No definition available.