Fair Value of Financial Instruments - Senior Notes (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
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	$ 534.0	$ 619.5
6.625% Senior Notes
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items]
Senior notes, gross carrying amount	$ 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	$ 280.5
IEA Senior Notes
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items]
Senior notes, gross carrying amount	225.1
Mastec Senior Notes
Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items]
Senior notes, gross carrying amount	$ 74.9

Contractual interest rate for funds borrowed, under the debt agreement.

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Fair value portion of notes payable.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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