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Disclosure of the percentage effect on project profit (defined as project revenue less project costs of revenue, including depreciation) during the reporting period of changes in contract estimates for projects that were in process as of the end of the prior year and are accounted for under the cost-to-cost method.

+ References

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Expected length of time within which an unapproved change order or claim is approved by the customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of billed or unbilled claims or similar items subject to uncertainty concerning their determination or ultimate realization under long-term contracts that are expected to be collected in the next fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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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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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Business, Basis of Presentation and Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenue [Line Items]
Revenue recognition, changes In contract estimates, cost-to-cost method, financial effect, percentage (less than)	0.50%	0.30%	0.30%	0.50%
Revenue recognition, remaining performance obligations, contract price allocated	$ 9,500.0		$ 9,500.0
Contract with customer, unapproved change orders and/or claims, amount	$ 159.0		159.0		$ 194.0
Clean Energy and Infrastructure \| Operating Segments
Revenue [Line Items]
Revenue recognition, changes in contract estimates, result from margin increases			$ 10.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Revenue [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months		3 months
Revenue recognition, remaining performance obligations, contract price allocated	$ 2,600.0		$ 2,600.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	2 years		2 years
Revenue recognition, remaining performance obligations, contract price allocated	$ 6,900.0		$ 6,900.0
Maximum
Revenue [Line Items]
Revenue recognition, changes In contract estimates, cost-to-cost method, financial effect, percentage (less than)			5.00%	5.00%
Change order or claim approval process, term within which expected to be completed			1 year
Revenue Benchmark \| Performance Obligation Concentration Risk \| Performance Obligation, Timing Of Recognition, Remainder Of Year
Revenue [Line Items]
Concentration risk, percentage of total			27.50%
Master Service and Other Service Agreements \| Revenue Benchmark \| Concentration Risk from Type of Arrangement
Revenue [Line Items]
Concentration risk, percentage of total	41.00%	37.00%	40.00%	42.00%
Master Service and Other Service Agreements \| Revenue Benchmark \| Concentration Risk from Type of Arrangement \| Point in Time
Revenue [Line Items]
Concentration risk, percentage of total	2.00%	2.00%	2.00%	3.00%