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Fair Value of Financial Instruments - Senior Notes - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
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4.50% Senior Notes |  |
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items] |  |
Senior notes, gross carrying amount | $ 600.0 | $ 600.0
4.50% Senior Notes | Senior Notes |  |
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items] |  |
Debt instrument, interest rate (percentage) | 4.50% |
Senior notes, estimated fair value | $ 552.0 | 534.0
6.625% Senior Notes |  |
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items] |  |
Senior notes, gross carrying amount | $ 282.1 | 281.2
6.625% Senior Notes | Senior Notes |  |
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items] |  |
Debt instrument, interest rate (percentage) | 6.625% |
Senior notes, estimated fair value | $ 268.5 | $ 280.5
Six Point Six Two Five Percent IEA Senior Notes |  |
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items] |  |
Senior notes, gross carrying amount | 225.1 |
Six Point Six Two Five Percent MasTec Senior Notes |  |
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items] |  |
Senior notes, gross carrying amount | $ 74.9 |

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- Definition Fair value portion of notes payable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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