Comprehensive Income (Loss) and Shareholders' (Deficit) Equity - Amounts Reclassified out of Accumulated Other Comprehensive (Loss) Income (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Gains and other income $ 0 $ 0
Interest expense (36) (30)
Income before income taxes 307 231
Provision for income taxes 100 59
NET INCOME 207 172
Foreign Currency Translation Adjustments | Reclassification of Gains (Losses) from Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Income before income taxes (3)  
Provision for income taxes 0  
NET INCOME (3)  
Other Derivative Instrument Adjustments | Reclassification of Gains (Losses) from Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Income before income taxes 5  
Provision for income taxes 0  
NET INCOME 5  
Interest rate contracts | Other Derivative Instrument Adjustments | Reclassification of Gains (Losses) from Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Interest expense (1)  
Cash flow hedges | Other Derivative Instrument Adjustments | Reclassification of Gains (Losses) from Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Base management and franchise fees 3  
Net investment hedging | Foreign Currency Translation Adjustments | Reclassification of Gains (Losses) from Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Gains and other income (3)  
Net investment hedging | Other Derivative Instrument Adjustments | Reclassification of Gains (Losses) from Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Gains and other income $ 3