Stock-Based Compensation - Grant Date Fair Value for Awards of Performance Units Inputs (Details) - Performance Stock Units (PSUs) to be settled in Common Stock - $ / shares |
6 Months Ended | ||||
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Jun. 30, 2026 |
Jun. 30, 2025 |
Apr. 10, 2026 |
Feb. 26, 2026 |
Feb. 27, 2025 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Valuation date price based on closing prices of Quanta common stock on February 26,2026 and April 10, 2026 for 2026 and February 27,2025 for 2025 (in usd per share) | $ 585.36 | $ 565.05 | $ 259.26 | ||
| Expected volatility (in percent) | 35.00% | 34.00% | |||
| Risk-free interest rate (in percent) | 4.05% | ||||
| Term in years | 2 years 10 months 2 days | ||||
| Minimum | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Risk-free interest rate (in percent) | 3.45% | ||||
| Term in years | 2 years 10 months 6 days | ||||
| Maximum | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Risk-free interest rate (in percent) | 3.85% | ||||
| Term in years | 4 years 8 months 23 days | ||||
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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