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Subsequent Event (Details) - Subsequent Event - USD ($) shares in Millions, $ in Millions | Oct. 13, 2021 | Oct. 31, 2021 | Oct. 08, 2021 | Oct. 07, 2021
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Integral Unconsolidated Affiliates |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Equity interest |  | 44.00% |  |
Senior Credit Facility | Line of Credit |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Borrowing capacity |  |  | $ 3,390.0 |
Delayed Draw Term Loan Facility | Senior Credit Facility | Line of Credit |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Borrowing capacity |  |  | 750.0 |
Revolving Credit Facility | Senior Credit Facility | Line of Credit |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Borrowing capacity |  |  | $ 2,640.0 | $ 2,510.0
Blattner Holding Company |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Cash consideration | $ 2,290.0 |  |  |
Number of shares granted for acquired companies (in shares) | 3.3 |  |  |
Value of quanta common stock issued | $ 345.4 |  |  |

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