Stock Compensation Plans

9 Months Ended

Sep. 30, 2015

7. STOCK COMPENSATION PLANS

As of September 30, 2015, the Company’s primary types of stock-based compensation were restricted stock and stock options. Stock-based compensation expense for the following periods was:



In millions	Three months ended September 30		Nine months ended September 30
In millions	2015	2014	2015	2014
Restricted stock expense	$12	$7	$32	$26
Tax benefit	(4)	(2)	(10)	(8)
Total stock-based compensation (net of tax)	$8	$5	$22	$18

Stock-based compensation expense is recognized in the financial statements based upon fair value. During the three and nine months ended September 30, 2015 and 2014, the Company did not grant any stock options. As of September 30, 2015, the total unrecognized compensation cost of $96 million related to unvested restricted stock grants is expected to be recognized over a weighted average period of approximately 1.2 years.