v3.26.3
FAIR VALUE MEASUREMENTS - Fair Value of Other Temporary Investments and Cash (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value $ 5,256 $ 4,916
Total Other Temporary Investments and Restricted Cash    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cost 315 264
Gross Unrealized Gains 33 29
Gross Unrealized Losses (7) (2)
Fair Value 341 291
Restricted Cash    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cost 89 71
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Fair Value 89 71
Other Cash Deposits    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cost 15 13
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Fair Value 15 13
Fixed Income Securities – Mutual Funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cost 198 167
Gross Unrealized Gains 0 0
Gross Unrealized Losses (7) (2)
Fair Value 191 165
Equity Securities – Mutual Funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cost 13 13
Gross Unrealized Gains 33 29
Gross Unrealized Losses 0 0
Fair Value $ 46 $ 42