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Receivables, net (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Time-Sharing Transactions, Maturities of Notes Receivable, Net [Abstract] |  |
Working capital contributions | $ 25.0 | $ 25.0
Percentage of total net receivables minimum | 10.00% |

X
- Definition Represents maximum individually percentage of net receivables. + References No definition available. + Details
Name: | gva_PercentageOfNetReceivablesIndividuallyMaximum
Namespace Prefix: | gva_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the value of total current assets net of current liabilities as of the balance sheet date. + References No definition available. + Details
Name: | gva_WorkingCapitalDeficit
Namespace Prefix: | gva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_TimeSharingTransactionsMaturitiesOfNotesReceivableNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration