v3.26.3
Cash and Cash Equivalents and Short-Term Investments (Details)
£ in Millions, $ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Sep. 30, 2026
GBP (£)
Dec. 31, 2025
GBP (£)
Cash, Cash Equivalents, and Short-Term Investments [Abstract]          
Cash and cash equivalents and short-term investments $ 15,300   $ 2,800    
Cash and cash equivalents and short term investments, period increase (decrease)     12,500    
Issuance of debt 13,404 $ 0      
Restricted cash and investments 165   180    
Operating funds required to be held in U.K. $ 97   $ 97 £ 73 £ 72