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Note 4. Intangible Assets Amortization Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets $ 117 $ 116 $ 109
Expected amortization expense for 2016 102    
Expected amortization expense for 2017 95    
Expected amortization expense for 2018 94    
Expected amortization expense for 2019 93    
Expected amortization expense for 2020 91    
Expected amortization expense thereafter 1,258    
Amortizable—Franchise agreements (a)      
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets 67 67 67
Amortizable—License agreements (c)      
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets 1 1 1
Amortizable—Customer relationships (d)      
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets 28 37 37
Amortizable—Pendings and listings (f)      
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets 16 8 3
Amortizable—Other (g)      
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets $ 5 $ 3 $ 1