XML 46 R34.htm IDEA: XBRL DOCUMENT
v3.23.1

Stock-Based Compensation (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule 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 three months ended March 31, 2023 and 2022 is as follows (RSUs in thousands):
| 2023 |  | 2022
| RSUs |  | Weighted Average Grant Date Fair Value (Per Unit) |  | RSUs |  | Weighted Average Grant Date Fair Value (Per Unit)
Unvested at January 1 | 3,263 |  |  | $78.74 |  | 3,880 |  |  | $61.64
Granted | 626 |  |  | $158.82 |  | 768 |  |  | $110.24
Vested | (1,120) |  |  | $65.50 |  | (1,177) |  |  | $48.50
Forfeited | (75) |  |  | $107.63 |  | (38) |  |  | $63.66
Unvested at March 31 | 2,694 |  |  | $102.59 |  | 3,433 |  |  | $77.09
A summary of the activity for PSUs to be settled in common stock for the three months ended March 31, 2023 and 2022 is as follows (PSUs in thousands):
| 2023 |  | 2022
| PSUs |  | Weighted Average Grant Date Fair Value (Per Unit) |  | PSUs |  | Weighted Average Grant Date Fair Value (Per Unit)
Unvested at January 1 | 733 |  |  | $65.39 |  | 931 |  |  | $47.27
Granted | 177 |  |  | $174.50 |  | 148 |  |  | $119.04
Vested | (413) |  |  | $35.12 |  | (334) |  |  | $40.15
Unvested at March 31 | 497 |  |  | $129.38 |  | 745 |  |  | $64.69
Grant Date Fair Value for Awards of Performance Units Inputs | The Monte Carlo simulation valuation methodology applied the following key inputs:
|  | 2023 |  | 2022
Valuation date price based on March 9, 2023 and March 2, 2022 closing stock prices of Quanta common stock |  | $160.55 |  | $110.24
Historical volatility |  | 35 | % |  | 39 | %
Risk-free interest rate |  | 4.62 | % |  | 1.64 | %
Term in years |  | 2.81 |  | 2.83

X
- Definition Schedule Of Share Based Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block] + References No definition available. + Details
Name: | pwr_ScheduleOfShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | pwr_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration