v3.26.1
DEBT AND EQUITY SECURITIES - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
property
Schedule of Equity Method Investments [Line Items]          
Other long-term liabilities $ 2,055   $ 2,055   $ 1,956
Equity method investments 196   196   186
Net financing receivables 499   499   472
Available-for-sale, unrealized loss   $ 0   $ (12)  
Amortized cost 526   526   475
Equity securities without a readily determinable fair value 6   6   11
Equity securities without a readily determinable fair value, impairment charge     5 0  
Convertible Debt Securities          
Schedule of Equity Method Investments [Line Items]          
Proceeds from sale of investment         $ 30
Number of franchised | property         1
Available-for-sale, unrealized loss (16) 4 (22) (1)  
Allowance for credit loss, expense   (25)   (30)  
Preferred equity          
Schedule of Equity Method Investments [Line Items]          
Amortized cost 351   351   $ 322
Preferred equity | Hyatt Regency Orlando          
Schedule of Equity Method Investments [Line Items]          
Amortized cost 199   199   196
Debt instrument, unamortized discount $ 26   $ 26   29
Debt instrument, interest rate, effective percentage 8.90%   8.90%    
Unconsolidated Hospitality Ventures          
Schedule of Equity Method Investments [Line Items]          
Equity method investments $ 177   $ 177    
Gain in equity earnings (losses)     0    
Net financing receivables 10   10    
Impairment charges on equity method investments   $ 6   $ 7  
Disposal Group, Disposed of by Sale | Guarantee Type, Other | Unlimited Vacation Club          
Schedule of Equity Method Investments [Line Items]          
Maximum potential future payments 132   132   149
Variable Interest Entity, Not Primary Beneficiary          
Schedule of Equity Method Investments [Line Items]          
Other long-term liabilities $ 78   $ 78   $ 80