Stock Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2017

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

Schedule of stock-based compensation expense recognized in the consolidated statements of operations

Total stock-based compensation expense recognized in the "Cost of services" and “Selling, general, and administrative” line items of the unaudited consolidated statements of operations resulting from stock options, non-vested restricted stock awards, and non-vested restricted stock units was as follows for the periods presented:

	Three months ended March 31,
(in millions)	2017		2016
Cost of services	$	19	$	49
Selling, general, and administrative	46		66
Total	$	65	$	115