XML 43 R30.htm IDEA: XBRL DOCUMENT v3.4.0.3
Share-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 28 $ 24  
Deferred compensation costs related to unvested awards $ 234   $ 116
Remaining shares authorized 23.0    
RSUs and Performance-based RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, weighted average grant-date fair value (in USD per share) $ 62    
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, granted to certain officers, key employees and, for SARS, directors (in shares) 1.6    
Stock awards, vesting period 4 years    
Stock awards, percentage of award vesting and becoming exercisable annually 25.00%    
Stock awards, period of service after grant date 1 year    
Stock Appreciation Rights      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, granted to certain officers, key employees and, for SARS, directors (in shares) 0.4    
Stock awards, vesting period 4 years    
Stock awards, percentage of award vesting and becoming exercisable annually 25.00%    
Stock awards, expiration 10 years    
Stock awards, weighted average grant-date fair value (in USD per share) $ 22    
Stock awards, weighted average exercise price (in USD per share) $ 67    
Stock Option Program and the SAR Program      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Remaining shares authorized 6.0    
Executive Officers | Performance-based RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, granted to certain officers, key employees and, for SARS, directors (in shares) 0.2    
Stock awards, vesting period 3 years    
Senior Leaders and Members of Starwood Acquisition Team | Performance-based RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, granted to certain officers, key employees and, for SARS, directors (in shares) 0.4    
Stock awards, vesting period 3 years