Quarterly report pursuant to Section 13 or 15(d)

Franchising, Marketing and Reservation Activities (Details)

v3.8.0.1
Franchising, Marketing and Reservation Activities (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Disaggregation of Revenue [Line Items]      
Net Revenues $ 302 $ 289 $ 1,280
Bad debt expense (less than) 1 1  
Proceeds from development advance notes 8 2  
Development advances 3 3  
Franchisees and hotel owners      
Disaggregation of Revenue [Line Items]      
Development advance notes $ 60   $ 64
Minimum      
Disaggregation of Revenue [Line Items]      
Franchise/management agreement term 10 years    
Maximum      
Disaggregation of Revenue [Line Items]      
Franchise/management agreement term 20 years    
Initial franchise fee revenue      
Disaggregation of Revenue [Line Items]      
Net Revenues $ 3 4  
Forgiveness of note receivable      
Disaggregation of Revenue [Line Items]      
Net Revenues $ 1 $ 2