v3.26.1
Long-Term Debt and Short-Term Borrowings - Turner & Townsend Revolving Credit Facility Narrative (Details) - Revolving credit facility - Turner & Townsend
£ in Millions, $ in Millions
Jun. 30, 2026
GBP (£)
Dec. 31, 2025
USD ($)
Mar. 31, 2022
GBP (£)
2027 Credit agreement      
Debt Instrument [Line Items]      
Amounts available to borrow under credit agreement     £ 120
Additional accordion option £ 20    
Revolving credit facility, maturity date January 31, 2024      
Debt Instrument [Line Items]      
Revolving credit facilities | $   $ 0