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Goodwill (Tables)
 3 Months Ended
Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in the Carrying Amount of Goodwill by Segment
The following table summarizes the changes in the carrying amount of goodwill by segment for the three months ended June 30, 2025.

(in millions)
Global Business Solutions
Consulting & Engineering Services
Global Infrastructure Services
Insurance Services
Total
Balance as of March 31, 2025, net$526 $— $— $— $526 
Reallocation of goodwill
(526)367 14 145 — 
Impairment losses(1)
— — (14)— (14)
Foreign currency translation(2)
— 14 — 6 20 
Balance as of June 30, 2025, net$— $381 $— $151 $532 
Goodwill, gross3,600 5,080 1,422 10,102 
Accumulated impairment losses(3,219)(5,080)(1,271)(9,570)
Balance as of June 30, 2025, net$381 $— $151 $532 
    

(1) Impairment losses are included within Other income, net on the statements of operations.
(2) The foreign currency translation amount reflects the impact of currency movements on non-U.S. dollar-denominated goodwill balances.