Stock-Based Compensation - Summary of Share-Based Payment Arrangement, Stock Appreciation Right, Activity (Detail)	3 Months Ended
Mar. 31, 2026 $ / shares shares
Time Vested [Member]
Schedule Of Share Based Compensation Stock Appreciation Rights Award Activity [Line Items]
Outstanding Balance, Units \| shares	216,187
Outstanding Balance, Price \| $ / shares	$ 200.16
Effect of Reorganization Transactions and IPO, Units \| shares	(216,187)
Effect of Reorganization Transactions and IPO, Price \| $ / shares	$ 200.16
Exchange of SOLV Energy Holdings LLC Equity Awards \| shares	15,602,637
Exchange of SOLV Energy Holdings LLC Equity Awards, Price \| $ / shares	$ 25
Forfeited in Period \| shares	(13,728)
Forfeited in Period, Price \| $ / shares	$ 25
Outstanding Balance, Units \| shares	15,588,909
Outstanding Balance, Price \| $ / shares	$ 25
Vested in Period \| shares	9,593,243
Vested in Period, Price \| $ / shares	$ 25
Performance Vested [Member]
Schedule Of Share Based Compensation Stock Appreciation Rights Award Activity [Line Items]
Outstanding Balance, Units \| shares	123,953
Outstanding Balance, Price \| $ / shares	$ 105.96
Effect of Reorganization Transactions and IPO, Units \| shares	(123,953)
Effect of Reorganization Transactions and IPO, Price \| $ / shares	$ 105.96
MOIC Vested [Member]
Schedule Of Share Based Compensation Stock Appreciation Rights Award Activity [Line Items]
Outstanding Balance, Units \| shares	82,969
Outstanding Balance, Price \| $ / shares	$ 106.09
Effect of Reorganization Transactions and IPO, Units \| shares	(82,969)
Effect of Reorganization Transactions and IPO, Price \| $ / shares	$ 106.09
Additional C Units [Member]
Schedule Of Share Based Compensation Stock Appreciation Rights Award Activity [Line Items]
Outstanding Balance, Units \| shares	79,007
Outstanding Balance, Price \| $ / shares	$ 261.48
Effect of Reorganization Transactions and IPO, Units \| shares	(79,007)
Effect of Reorganization Transactions and IPO, Price \| $ / shares	$ 261.48

Schedule Of Share Based Compensation Stock Appreciation Rights Award Activity.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options effect of reorganisation in period fair value.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options effect of reorganisation transactions.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options exchange in period.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options exchange in period fair value.

+ References

No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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