XML 133 R111.htm IDEA: XBRL DOCUMENT v3.8.0.1
SHARE-BASED COMPENSATION - Share-Based Compensation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Share-based compensation expense $ 92 $ 66 $ 51
Tax benefit $ 32 $ 22 $ 18