XML 72 R55.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stock-Based Compensation Incentive Equity Awards Activity - Summary of Option Activity (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Options, Weighted Average Exercise Price Roll Forward    
Proceeds from exercise of stock options $ 3 $ 1
Options    
Options, Number of Shares Roll Forward    
Outstanding at January 1, 2017 3.3  
Granted 0.4  
Exercised (a) (b) [1],[2] (0.2)  
Forfeited/Expired 0.0  
Outstanding at June 30, 2017 (c) [3] 3.5  
Options, Weighted Average Exercise Price Roll Forward    
Outstanding at January 1, 2017 $ 31.71  
Granted 27.56  
Exercised (a) (b) [1],[2] 23.89  
Forfeited/Expired 0.00  
Outstanding at June 30, 2017 (c) [3] $ 31.50  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 1  
Proceeds from exercise of stock options 5  
Intrinsic value of outstanding options $ 6  
Weighted average remaining contractual life of outstanding options 6 years  
[1] Cash received from options exercised during the six months ended June 30, 2017 was $5 million.
[2] The intrinsic value of options exercised during the six months ended June 30, 2017 was $1 million.
[3] Options outstanding at June 30, 2017 have an intrinsic value of $6 million and have a weighted average remaining contractual life of 6 years.