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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Summary of RSUs and PSUs to be Settled in Common Stock Activity | A summary of the activity for RSUs to be settled in common stock for the years ended December 31, 2024, 2023 and 2022 is as follows (RSUs in thousands):
| 2024 |  | 2023 |  | 2022
| RSUs |  | Weighted Average Grant Date Fair Value (Per Unit) |  | RSUs |  | Weighted Average Grant Date Fair Value (Per Unit) |  | RSUs |  | Weighted Average Grant Date Fair Value (Per Unit)
Unvested at January 1 | 2,548 |  |  | $104.76 |  | 3,263 |  |  | $78.74 |  | 3,880 |  |  | $61.64
Granted | 857 |  |  | $246.34 |  | 684 |  |  | $161.81 |  | 860 |  |  | $113.07
Vested | (1,216) |  |  | $82.86 |  | (1,268) |  |  | $68.06 |  | (1,319) |  |  | $50.60
Forfeited | (165) |  |  | $165.14 |  | (131) |  |  | $116.29 |  | (158) |  |  | $84.94
Unvested at December 31 | 2,024 |  |  | $173.32 |  | 2,548 |  |  | $104.76 |  | 3,263 |  |  | $78.74
A summary of the activity for PSUs to be settled in common stock for the years ended December 31, 2024, 2023 and 2022 is as follows (PSUs in thousands):
| 2024 |  | 2023 |  | 2022
| PSUs |  | Weighted Average Grant Date Fair Value (Per Unit) |  | PSUs |  | Weighted Average Grant Date Fair Value (Per Unit) |  | PSUs |  | Weighted Average Grant Date Fair Value (Per Unit)
Unvested at January 1 | 491 |  |  | $129.70 |  | 733 |  |  | $65.39 |  | 931 |  |  | $47.27
Granted | 109 |  |  | $263.34 |  | 177 |  |  | $174.50 |  | 153 |  |  | $119.74
Vested | (175) |  |  | $96.45 |  | (413) |  |  | $35.12 |  | (334) |  |  | $40.15
Forfeited | — |  |  | N/A |  | (6) |  |  | $101.66 |  | (17) |  |  | $58.79
Unvested at December 31 | 425 |  |  | $177.69 |  | 491 |  |  | $129.70 |  | 733 |  |  | $65.39
Grant Date Fair Value for Awards of Performance Units Inputs | The Monte Carlo simulation valuation methodology applied the following key inputs:
|  | 2024 |  | 2023 |  | 2022
Valuation date price based on March 4, 2024, March 9, 2023 and March 2, 2022 closing stock prices of Quanta common stock |  | $243.34 |  | $160.55 |  | $110.24
Expected volatility (1) |  | 33 | % |  | 35 | % |  | 39 | %
Risk-free interest rate |  | 4.43 | % |  | 4.62 | % |  | 1.64 | %
Term in years |  | 2.83 |  | 2.81 |  | 2.83
(1) The expected volatility inputs for Quanta are based on historical volatility, which is based on Quanta’s dividend-adjusted closing prices over a period equivalent to the performance period.

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- Definition Schedule Of Share Based Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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