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Acquisitions - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2025	Jan. 16, 2025	Jan. 01, 2025
Project Management | Turner & Townsend
Business Acquisition [Line Items]
Equity method investments in unconsolidated subsidiaries, variations in ownership percentage			70.00%
Industrious
Business Acquisition [Line Items]
Equity interest percentage		60.00%
Goodwill deductible amount	$ 395
Industrious | Building Operations & Experience
Business Acquisition [Line Items]
Equity interest percentage		100.00%
Turner & Townsend | Project Management
Business Acquisition [Line Items]
Equity interest percentage			10.00%
Estimated based on discounted forecasted cash flows	$ 371

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of reorganization value related to present value of discounted cash flows of the emerging entity. Reorganization value is the amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

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