Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Amortization Expense of Amortizable Intangible Assets) (Details)

v3.10.0.1
Intangible Assets (Amortization Expense of Amortizable Intangible Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]      
Amortization expense $ 31 $ 20 $ 18
2019 37    
2020 37    
2021 37    
2022 35    
2023 34    
Franchise agreements      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense 22 16 15
Management agreements      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense 7 3 2
Trademarks, net      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense 1 1 0
Other      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense $ 1 $ 0 $ 1