v3.25.0.1
SEGMENT AND GEOGRAPHIC INFORMATION - Schedule of Summarized Consolidated Financial Information by Segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting Information      
Revenue $ (6,648) $ (6,667) $ (5,891)
Segment Revenues      
Segment Reporting Information      
Revenue (3,365) (3,656) (3,302)
Gross fees      
Segment Reporting Information      
Revenue (1,099) (970) (808)
Base management fees      
Segment Reporting Information      
Revenue (399) (374) (319)
Incentive management fees      
Segment Reporting Information      
Revenue (242) (232) (192)
Franchise and other fees      
Segment Reporting Information      
Revenue (458) (364) (297)
Owned and leased      
Segment Reporting Information      
Revenue (1,174) (1,339) (1,235)
Rooms revenue      
Segment Reporting Information      
Revenue (754) (845) (772)
Food and beverage      
Segment Reporting Information      
Revenue (279) (333) (305)
Other      
Segment Reporting Information      
Revenue (141) (161) (158)
Distribution      
Segment Reporting Information      
Revenue (1,023) (1,047) (986)
Other revenues      
Segment Reporting Information      
Revenue (69) (300) (273)
Contra revenue      
Segment Reporting Information      
Revenue 69 47 31
Revenues for reimbursed costs      
Segment Reporting Information      
Revenue (3,352) (3,058) (2,620)
Operating Segments      
Segment Reporting Information      
Revenue (6,720) (6,758) (5,977)
Operating Segments | Management and franchising      
Segment Reporting Information      
Revenue (4,474) (4,154) (3,591)
Operating Segments | Owned and leased      
Segment Reporting Information      
Revenue (1,197) (1,368) (1,263)
Operating Segments | Distribution      
Segment Reporting Information      
Revenue (1,049) (1,236) (1,123)
Operating Segments | Segment Revenues      
Segment Reporting Information      
Revenue (3,437) (3,747) (3,388)
Operating Segments | Segment Revenues | Management and franchising      
Segment Reporting Information      
Revenue (1,191) (1,143) (1,002)
Operating Segments | Segment Revenues | Owned and leased      
Segment Reporting Information      
Revenue (1,197) (1,368) (1,263)
Operating Segments | Segment Revenues | Distribution      
Segment Reporting Information      
Revenue (1,049) (1,236) (1,123)
Operating Segments | Gross fees      
Segment Reporting Information      
Revenue (1,149) (1,033) (868)
Operating Segments | Gross fees | Management and franchising      
Segment Reporting Information      
Revenue (1,149) (1,033) (868)
Operating Segments | Gross fees | Owned and leased      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Gross fees | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Base management fees      
Segment Reporting Information      
Revenue (432) (414) (356)
Operating Segments | Base management fees | Management and franchising      
Segment Reporting Information      
Revenue (432) (414) (356)
Operating Segments | Base management fees | Owned and leased      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Base management fees | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Incentive management fees      
Segment Reporting Information      
Revenue (252) (248) (205)
Operating Segments | Incentive management fees | Management and franchising      
Segment Reporting Information      
Revenue (252) (248) (205)
Operating Segments | Incentive management fees | Owned and leased      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Incentive management fees | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Franchise and other fees      
Segment Reporting Information      
Revenue (465) (371) (307)
Operating Segments | Franchise and other fees | Management and franchising      
Segment Reporting Information      
Revenue (465) (371) (307)
Operating Segments | Franchise and other fees | Owned and leased      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Franchise and other fees | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Owned and leased      
Segment Reporting Information      
Revenue (1,197) (1,368) (1,263)
Operating Segments | Owned and leased | Management and franchising      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Owned and leased | Owned and leased      
Segment Reporting Information      
Revenue (1,197) (1,368) (1,263)
Operating Segments | Owned and leased | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Rooms revenue      
Segment Reporting Information      
Revenue (777) (874) (800)
Operating Segments | Rooms revenue | Management and franchising      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Rooms revenue | Owned and leased      
Segment Reporting Information      
Revenue (777) (874) (800)
Operating Segments | Rooms revenue | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Food and beverage      
Segment Reporting Information      
Revenue (279) (333) (305)
Operating Segments | Food and beverage | Management and franchising      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Food and beverage | Owned and leased      
Segment Reporting Information      
Revenue (279) (333) (305)
Operating Segments | Food and beverage | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Other      
Segment Reporting Information      
Revenue (141) (161) (158)
Operating Segments | Other | Management and franchising      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Other | Owned and leased      
Segment Reporting Information      
Revenue (141) (161) (158)
Operating Segments | Other | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Distribution      
Segment Reporting Information      
Revenue (1,023) (1,047) (986)
Operating Segments | Distribution | Management and franchising      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Distribution | Owned and leased      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Distribution | Distribution      
Segment Reporting Information      
Revenue (1,023) (1,047) (986)
Operating Segments | Other revenues      
Segment Reporting Information      
Revenue (68) (299) (271)
Operating Segments | Other revenues | Management and franchising      
Segment Reporting Information      
Revenue (42) (110) (134)
Operating Segments | Other revenues | Owned and leased      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Other revenues | Distribution      
Segment Reporting Information      
Revenue (26) (189) (137)
Operating Segments | Contra revenue      
Segment Reporting Information      
Revenue 69 47 31
Operating Segments | Contra revenue | Management and franchising      
Segment Reporting Information      
Revenue 69 47 31
Operating Segments | Contra revenue | Owned and leased      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Contra revenue | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Revenues for reimbursed costs      
Segment Reporting Information      
Revenue (3,352) (3,058) (2,620)
Operating Segments | Revenues for reimbursed costs | Management and franchising      
Segment Reporting Information      
Revenue (3,352) (3,058) (2,620)
Operating Segments | Revenues for reimbursed costs | Owned and leased      
Segment Reporting Information      
Revenue 0 0 0
Operating Segments | Revenues for reimbursed costs | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Eliminations      
Segment Reporting Information      
Revenue 72 91 86
Eliminations | Management and franchising      
Segment Reporting Information      
Revenue 49 62 58
Eliminations | Owned and leased      
Segment Reporting Information      
Revenue 23 29 28
Eliminations | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Eliminations | Segment Revenues      
Segment Reporting Information      
Revenue 72 91 86
Eliminations | Gross fees      
Segment Reporting Information      
Revenue 50 63 60
Eliminations | Base management fees      
Segment Reporting Information      
Revenue 33 40 37
Eliminations | Incentive management fees      
Segment Reporting Information      
Revenue 10 16 13
Eliminations | Franchise and other fees      
Segment Reporting Information      
Revenue 7 7 10
Eliminations | Owned and leased      
Segment Reporting Information      
Revenue 23 29 28
Eliminations | Rooms revenue      
Segment Reporting Information      
Revenue 23 29 28
Eliminations | Food and beverage      
Segment Reporting Information      
Revenue 0 0 0
Eliminations | Other      
Segment Reporting Information      
Revenue 0 0 0
Eliminations | Distribution      
Segment Reporting Information      
Revenue 0 0 0
Eliminations | Other revenues      
Segment Reporting Information      
Revenue (1) (1) (2)
Eliminations | Contra revenue      
Segment Reporting Information      
Revenue 0 0 0
Eliminations | Revenues for reimbursed costs      
Segment Reporting Information      
Revenue $ 0 $ 0 $ 0