v3.26.3
Fair Value Measurements - Schedule of Fair Value of Investment Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value $ 6 $ 5
Level 1 | Exchange-traded Funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 6 5
Level 1 | Time Deposits    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 0 0
Level 1 | Government Securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 0 0
Level 1 | Corporate Bonds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 0 0
Level 1 | Asset-backed Securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 0 0
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 528 182
Level 2 | Exchange-traded Funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 0 0
Level 2 | Time Deposits    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 375 0
Level 2 | Government Securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 69 71
Level 2 | Corporate Bonds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 67 82
Level 2 | Asset-backed Securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 17 29
Total    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 534 187
Total | Exchange-traded Funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 6 5
Total | Time Deposits    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 375 0
Total | Government Securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 69 71
Total | Corporate Bonds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value 67 82
Total | Asset-backed Securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Investments at Fair Value $ 17 $ 29