In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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- Definition

Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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- Definition

Amount of realized loss from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of realized and unrealized gain (loss) on investment.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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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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Segments and Related Information - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment and Related Information [Line Items]
Number of operating segments \| segment		5
Number of reportable segments \| segment		5
Other
Segment and Related Information [Line Items]
Gain (loss) on investments			$ 2.8
Corporate
Segment and Related Information [Line Items]
Bargain purchase gain			0.2	$ 3.5
Corporate \| AVCT
Segment and Related Information [Line Items]
Fair value losses related to investment		$ 0.2	7.7	7.8
2023 Acquisitions
Segment and Related Information [Line Items]
Acquisition and integration costs		71.9
2023 Acquisitions \| Reportable Segments \| Communications Segment
Segment and Related Information [Line Items]
Acquisition and integration costs		22.5
2023 Acquisitions \| Reportable Segments \| Clean Energy and Infrastructure Segment
Segment and Related Information [Line Items]
Acquisition and integration costs		37.1
2023 Acquisitions \| Reportable Segments \| Power Delivery
Segment and Related Information [Line Items]
Acquisition and integration costs		8.5
2023 Acquisitions \| Corporate
Segment and Related Information [Line Items]
Acquisition and integration costs		$ 3.8
2022 Acquisitions
Segment and Related Information [Line Items]
Acquisition and integration costs			86.0
2022 Acquisitions \| Reportable Segments \| Communications Segment
Segment and Related Information [Line Items]
Acquisition and integration costs			4.7
2022 Acquisitions \| Reportable Segments \| Clean Energy and Infrastructure Segment
Segment and Related Information [Line Items]
Acquisition and integration costs			6.4
2022 Acquisitions \| Reportable Segments \| Power Delivery
Segment and Related Information [Line Items]
Acquisition and integration costs			39.0
2022 Acquisitions \| Reportable Segments \| Oil and Gas
Segment and Related Information [Line Items]
Acquisition and integration costs			8.0
2022 Acquisitions \| Corporate
Segment and Related Information [Line Items]
Acquisition and integration costs			27.9
2021 Acquisitions
Segment and Related Information [Line Items]
Acquisition and integration costs				$ 3.6
Bargain purchase gain			3.6
2021 Acquisitions \| Power Delivery
Segment and Related Information [Line Items]
Bargain purchase gain	$ 3.6		$ 0.2