Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

We recognized the following employee share-based compensation expense during the second quarter and the first six months of 2017 and 2016:

	Three Months Ended June 30,				Six Months Ended June 30,
(Dollars in millions)	2017		2016		2017		2016
Share-based compensation	$	17	$	17	$	41	$	38
Related tax benefit	—		4		—		8