Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

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

Schedule of Stock-Based Compensation

Stock-based compensation for the three months ended March 31 is as follows:

(in millions)	2019		2018
Stock option expense	$	—	$	1
Restricted stock and unit awards expense	12		12
Total stock-based compensation expense	$	12	$	13