Employee Benefit Plans (Summary of Key Information for the Plans) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Multiemployer Plans [Line Items]
Company contributions	$ 32.3	$ 41.2	$ 44.8
The Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Green	Green
Company contributions	$ 6.7	$ 9.5	10.1
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Apr. 15, 2025
Joint Pension Fund, Local Union 164 IBEW
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Green	Green
Company contributions	$ 6.4	$ 6.8	2.5
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Apr. 30, 2026
Excavators Union Local 731 Pension Fund
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Green	Green
Company contributions	$ 4.0	$ 4.0	4.8
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Apr. 30, 2026
Construction Laborers Pension Trust for Southern California
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Green	Green
Company contributions	$ 3.4	$ 2.8	1.5
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Jun. 30, 2026
Operating Engineers Pension Trust
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Yellow	Yellow
FIP/RP Status Pending or Implemented	Implemented
Company contributions	$ 3.4	$ 2.4	1.5
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Jun. 30, 2025
Carpenters Pension Trust Fund for Northern California
Multiemployer Plans [Line Items]
Pension Protections Act Zone Status	Red	Red
FIP/RP Status Pending or Implemented	Implemented
Company contributions	$ 2.4	$ 2.9	$ 4.6
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Jun. 30, 2023

Indicates certified zone status of multiemployer pension plan determined to be individually significant. Acceptable values are "Green", "Yellow", "Orange", "Red", "Other", and "NA".

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Expiration date of collective-bargaining arrangement (CBA) requiring contribution to multiemployer pension plan determined to be individually significant, in YYYY-MM-DD format.

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- Definition

Amount of cost for employer contribution to multiemployer pension plan determined to be individually significant.

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- Definition

Indicates whether funding improvement plan or rehabilitation plan was implemented or pending for multiemployer pension plan, determined to be individually significant. Acceptable values are "No", "Pending", "Implemented", "Other", and "NA".

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- Definition

Indicates whether employer paid surcharge to multiemployer pension plan determined to be individually significant. Acceptable values are "No", "Yes" and "NA".

+ References

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-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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